BEGIN:VCALENDAR VERSION:2.0 PRODID:-//IXAS: The International X-ray Absorption Society - ECPv6.15.15//NONSGML v1.0//EN CALSCALE:GREGORIAN METHOD:PUBLISH X-WR-CALNAME:IXAS: The International X-ray Absorption Society X-ORIGINAL-URL:https://xrayabsorption.org X-WR-CALDESC:Events for IXAS: The International X-ray Absorption Society REFRESH-INTERVAL;VALUE=DURATION:PT1H X-Robots-Tag:noindex X-PUBLISHED-TTL:PT1H BEGIN:VTIMEZONE TZID:UTC BEGIN:STANDARD TZOFFSETFROM:+0000 TZOFFSETTO:+0000 TZNAME:UTC DTSTART:20190101T000000 END:STANDARD END:VTIMEZONE BEGIN:VTIMEZONE TZID:America/New_York BEGIN:DAYLIGHT TZOFFSETFROM:-0500 TZOFFSETTO:-0400 TZNAME:EDT DTSTART:20210314T070000 END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:-0400 TZOFFSETTO:-0500 TZNAME:EST DTSTART:20211107T060000 END:STANDARD BEGIN:DAYLIGHT TZOFFSETFROM:-0500 TZOFFSETTO:-0400 TZNAME:EDT DTSTART:20220313T070000 END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:-0400 TZOFFSETTO:-0500 TZNAME:EST DTSTART:20221106T060000 END:STANDARD BEGIN:DAYLIGHT TZOFFSETFROM:-0500 TZOFFSETTO:-0400 TZNAME:EDT DTSTART:20230312T070000 END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:-0400 TZOFFSETTO:-0500 TZNAME:EST DTSTART:20231105T060000 END:STANDARD BEGIN:DAYLIGHT TZOFFSETFROM:-0500 TZOFFSETTO:-0400 TZNAME:EDT DTSTART:20240310T070000 END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:-0400 TZOFFSETTO:-0500 TZNAME:EST DTSTART:20241103T060000 END:STANDARD END:VTIMEZONE BEGIN:VTIMEZONE TZID:UTC BEGIN:STANDARD TZOFFSETFROM:+0000 TZOFFSETTO:+0000 TZNAME:UTC DTSTART:20220101T000000 END:STANDARD END:VTIMEZONE BEGIN:VTIMEZONE TZID:America/Chicago BEGIN:DAYLIGHT TZOFFSETFROM:-0600 TZOFFSETTO:-0500 TZNAME:CDT DTSTART:20210314T080000 END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:-0500 TZOFFSETTO:-0600 TZNAME:CST DTSTART:20211107T070000 END:STANDARD BEGIN:DAYLIGHT TZOFFSETFROM:-0600 TZOFFSETTO:-0500 TZNAME:CDT DTSTART:20220313T080000 END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:-0500 TZOFFSETTO:-0600 TZNAME:CST DTSTART:20221106T070000 END:STANDARD BEGIN:DAYLIGHT TZOFFSETFROM:-0600 TZOFFSETTO:-0500 TZNAME:CDT DTSTART:20230312T080000 END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:-0500 TZOFFSETTO:-0600 TZNAME:CST DTSTART:20231105T070000 END:STANDARD END:VTIMEZONE BEGIN:VTIMEZONE TZID:Europe/Paris BEGIN:DAYLIGHT TZOFFSETFROM:+0100 TZOFFSETTO:+0200 TZNAME:CEST DTSTART:20190331T010000 END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:+0200 TZOFFSETTO:+0100 TZNAME:CET DTSTART:20191027T010000 END:STANDARD BEGIN:DAYLIGHT TZOFFSETFROM:+0100 TZOFFSETTO:+0200 TZNAME:CEST DTSTART:20200329T010000 END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:+0200 TZOFFSETTO:+0100 TZNAME:CET DTSTART:20201025T010000 END:STANDARD BEGIN:DAYLIGHT TZOFFSETFROM:+0100 TZOFFSETTO:+0200 TZNAME:CEST DTSTART:20210328T010000 END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:+0200 TZOFFSETTO:+0100 TZNAME:CET DTSTART:20211031T010000 END:STANDARD END:VTIMEZONE BEGIN:VEVENT DTSTART;VALUE=DATE:20231101 DTEND;VALUE=DATE:20231104 DTSTAMP:20260416T013636 CREATED:20230822T031348Z LAST-MODIFIED:20230822T031348Z UID:823-1698796800-1699055999@xrayabsorption.org SUMMARY:XAFS 2023 Short Course on XAFS\, BNL DESCRIPTION:Application deadline: August 31\, 2023 https://www.bnl.gov/xafscourse/ \nEvery year Brookhaven National Laboratory offers a three-day training course to those interested in learning about the use of x-ray absorption spectroscopy methods. This year\, the course will be offered on site November 1–3\, 2023. It continues the annual tradition of gathering a group of scientists\, active in the field\, to share their expertise with those interested in learning about the use of x-ray spectroscopy methods in their research. \nThe course will be useful for those scientists interested in learning advanced XANES and EXAFS methods\, including\, tentatively\, molecular dynamics EXAFS (MD-EXAFS)\, reverse Monte Carlo EXAFS (RMC-EXAFS)\, machine learning – assisted XANES and EXAFS (ML-XANES and ML-EXAFS)\, and data analysis and are interested in advanced modeling methods applicable for nanomaterials research. \nDuring the last day of the workshop\, as has been our tradition since the inception of Brookhaven XAFS short courses\, the instructors will divide participants in groups for in-depth problem solving\, data analysis and modeling\, to best match participants and their research interests. There will be Q&A sessions on the subject of the lectures on the first and second days of the workshop. X-ray spectroscopy is one of the main techniques of the DOE light sources\, and the course supports the DOE mission by educating new users in the applications of this technique. \nCourse participants will be limited and selected based on their application materials. \nWednesday\, November 1 and Thursday\, November 2 will be devoted to lectures and demonstrations of the software packages.\nFriday\, November 3 will be devoted to the practical session\, in which participants will practice problem solving methods discussed in the previous days. Registered participants will have an option to analyze their own data\, in addition to the projects chosen for training purpose.\nCourse Enrollment Application URL:https://xrayabsorption.org/events/xafs-2023-short-course-on-xafs-bnl/ LOCATION:Brookhaven National Lab\, Islip\, NY\, United States END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/New_York:20231030T080000 DTEND;TZID=America/New_York:20231031T170000 DTSTAMP:20260416T013636 CREATED:20230830T173542Z LAST-MODIFIED:20230830T173542Z UID:829-1698652800-1698771600@xrayabsorption.org SUMMARY:EXAFS-50 Symposium DESCRIPTION:https://www.bnl.gov/exafs-50/ \nThis is a two-day Symposium (“EXAFS-50”) that will be devoted to marking the 50th anniversary of discovery of EXAFS. The workshop will bring together the scientists that will talk about the past and present of EXAFS technique and cover topics discussing its future potential and applications. EXAFS is one of the major synchrotron techniques at the DOE light sources and the workshop’s scope directly supports the mission of DOE to establish leadership in advanced characterization at the DOE large user facilities. URL:https://xrayabsorption.org/events/exafs-50-symposium/ LOCATION:Brookhaven National Lab\, Islip\, NY\, United States END:VEVENT BEGIN:VEVENT DTSTART;VALUE=DATE:20231010 DTEND;VALUE=DATE:20231013 DTSTAMP:20260416T013636 CREATED:20230822T031002Z LAST-MODIFIED:20230822T031502Z UID:821-1696896000-1697155199@xrayabsorption.org SUMMARY:XAS 2023 @ BNL DESCRIPTION:XAS 2023: Fundamentals of XAS Data Analysis: A Hands-on Tutorial\nHosted by Brookhaven National Laboratory\, October 10–12\, 2023: https://www.bnl.gov/xascourse/index.php \nAbout this Course \nX-ray absorption spectroscopy is a core technique of the DOE synchrotron user facilities and attracts diverse scientific communities. This 3-day course offered by NSLS-II experts will introduce XAS data analysis for new and prospective users and provide an opportunity to perform real experiments at NSLS-II XAS beamlines. The first day will be devoted to fundamentals of XAS analysis\, data reduction and processing\, and basics of XAS experiments and instrumentation. \nParticipants will be trained hands-on on XAS data analysis of increasing complexity. Modern XAS methods such as high-resolution spectroscopy will also be introduced. On the third day\, the participants will participate in the experiments at XAS beamlines and analyze the data they collect. URL:https://xrayabsorption.org/events/xas-2023-bnl/ LOCATION:Brookhaven National Lab\, Islip\, NY\, United States END:VEVENT BEGIN:VEVENT DTSTART;TZID=UTC:20230822T080000 DTEND;TZID=UTC:20230822T160000 DTSTAMP:20260416T013636 CREATED:20221025T201452Z LAST-MODIFIED:20221213T131825Z UID:747-1692691200-1692720000@xrayabsorption.org SUMMARY:XAFS Workshop at IUCr 2023 DESCRIPTION:Room 220 of the Melbourne Convention Centre. See also: https://iucr2023.org/workshops/.\nPrice for attendance: $40AUD to cover coffee break and lunch.\n\n  \nThis workshop is intended to be an introduction to XAFS principles and techniques for crystallographers with tutorials and a hand-on-training session on data analysis. The talks are delivered by experienced XAFS professionals from all over the world that include basic principles of the technique\, basic and advanced data analysis techniques and examples of the application of XAFS technique in several cutting-edge research areas of physical science\, material science\, chemical\, and biological sciences. \n \nProgramme: coming soon. \n \nSee also: IUCr 2023 URL:https://xrayabsorption.org/events/xafs_iucr2023/ LOCATION:Melbourne\, Melbourne Convention & Exhibition Centre\, Melbourne\, Australia END:VEVENT BEGIN:VEVENT DTSTART;VALUE=DATE:20230817 DTEND;VALUE=DATE:20230820 DTSTAMP:20260416T013636 CREATED:20221212T230739Z LAST-MODIFIED:20230208T165159Z UID:772-1692230400-1692489599@xrayabsorption.org SUMMARY:Q2XAFS 2023 DESCRIPTION:The International Workshop on Improving Data Quality and Quantity in XAFS Spectroscopy (Q2XAFS2023) will be held at the Australian Synchrotron in Melbourne (Australia)\, August 17-19\, 2023. This will be a satellite meeting of the 2023 IUCr Congress. \nThe workshop aims to bring together experts in the field of X-ray Absorption Spectroscopy to discuss aspects of the technique that affect data quality in XAFS experiments. Q2XAFS2023 will provide a forum for discussions with the goal of reviewing international standards and protocols and developing revised recommendations for best practices when performing XAFS experiments. The workshop will be attended by scientists working at international facilities as well as academics. \nThe workshop will prioritize gender balance and give equal opportunity across scientific disciplines and regions. \nA Poster session will include awards for Early Career scientists. \nFor more details\, see:\n Q2XAFS description at xrayabsorption.org\n Q2XAFS2023: official webpage at ANSTO URL:https://xrayabsorption.org/events/q2xafs-2023/ LOCATION:Australia Synchrotron\, Melbourne\, Australia END:VEVENT BEGIN:VEVENT DTSTART;VALUE=DATE:20221102 DTEND;VALUE=DATE:20221105 DTSTAMP:20260416T013636 CREATED:20220730T191016Z LAST-MODIFIED:20220810T163356Z UID:734-1667347200-1667606399@xrayabsorption.org SUMMARY:2022 XAFS Short Course at BNL DESCRIPTION:BNL XAFS Short Course (Virtual) \nNovember 2-4\, 2022 \nSee https://www.bnl.gov/xafscourse/ for more information. URL:https://xrayabsorption.org/events/2022-bnl-short-course/ LOCATION:Brookhaven National Lab\, Islip\, NY\, United States CATEGORIES:Training Courses END:VEVENT BEGIN:VEVENT DTSTART;VALUE=DATE:20220724 DTEND;VALUE=DATE:20220730 DTSTAMP:20260416T013636 CREATED:20220424T161231Z LAST-MODIFIED:20220424T161316Z UID:663-1658620800-1659139199@xrayabsorption.org SUMMARY:2022 APS/IIT XAFS Summer School DESCRIPTION:Illinois Institute of Technology \nChicago\, IL 60616  \nSee https://xrayabsorption.org/2022-aps-iit-xafs-summer-school for more information URL:https://xrayabsorption.org/events/2022-aps-iit-xafs-summer-school/ LOCATION:Illinois Institute of Technology\, Chicago\, IL\, United States CATEGORIES:Training Courses ORGANIZER;CN="Grant Bunker":MAILTO:gbunker@iit.edu END:VEVENT BEGIN:VEVENT DTSTART;VALUE=DATE:20220710 DTEND;VALUE=DATE:20220716 DTSTAMP:20260416T013636 CREATED:20220424T162141Z LAST-MODIFIED:20220424T162141Z UID:674-1657411200-1657929599@xrayabsorption.org SUMMARY:XAFS 2022 DESCRIPTION:https://xafs2022.org URL:https://xrayabsorption.org/events/xafs-2022/ END:VEVENT BEGIN:VEVENT DTSTART;VALUE=DATE:20220601 DTEND;VALUE=DATE:20220602 DTSTAMP:20260416T013636 CREATED:20220314T223657Z LAST-MODIFIED:20220314T223731Z UID:655-1654041600-1654127999@xrayabsorption.org SUMMARY:2025 XAFS Conference Proposal Deadline DESCRIPTION:IXAS Conference Selection URL:https://xrayabsorption.org/events/2025-xafs-conference-proposal-deadline/ END:VEVENT BEGIN:VEVENT DTSTART;VALUE=DATE:20220501 DTEND;VALUE=DATE:20220502 DTSTAMP:20260416T013636 CREATED:20220225T043813Z LAST-MODIFIED:20220225T044537Z UID:635-1651363200-1651449599@xrayabsorption.org SUMMARY:IXAS Award Nomination Deadline DESCRIPTION:Call for 2022 IXAS Awards URL:https://xrayabsorption.org/events/call-for-ixas-awards/ CATEGORIES:XAFS Conference END:VEVENT BEGIN:VEVENT DTSTART;VALUE=DATE:20220417 DTEND;VALUE=DATE:20220418 DTSTAMP:20260416T013636 CREATED:20220225T044949Z LAST-MODIFIED:20220225T045255Z UID:642-1650153600-1650239999@xrayabsorption.org SUMMARY:XAFS 2022 Abstract Deadline DESCRIPTION:https://xafs2022.org/ \n  \n  URL:https://xrayabsorption.org/events/xafs-2022-abstract-deadline/ CATEGORIES:XAFS Conference END:VEVENT BEGIN:VEVENT DTSTART;TZID=Europe/Paris:20201113T140000 DTEND;TZID=Europe/Paris:20201113T150000 DTSTAMP:20260416T013636 CREATED:20201111T154424Z LAST-MODIFIED:20201111T154424Z UID:601-1605276000-1605279600@xrayabsorption.org SUMMARY:ESRF Webinar: Marius Retegan: Computational Spectroscopy in the Age of the Extremely Brilliant Source:  From Punch Cards to Artificial Intelligence DESCRIPTION:Computational Spectroscopy in the Age of the Extremely Brilliant Source:  From Punch Cards to Artificial Intelligence \nMarius Retegan\, ESRF scientist\n\nPlease click the link below to join the webinar:\nhttps://esrf.zoom.us/j/92127181949?pwd=bDlpOCtMVDEreDFPSTd0aE14Ymh2Zz09\nPasscode: F5i@Cu\nWebinar ID: 921 2718 1949 URL:https://xrayabsorption.org/events/esrf_retegan/ END:VEVENT BEGIN:VEVENT DTSTART;VALUE=DATE:20200917 DTEND;VALUE=DATE:20200918 DTSTAMP:20260416T013636 CREATED:20200916T182758Z LAST-MODIFIED:20200916T182758Z UID:595-1600300800-1600387199@xrayabsorption.org SUMMARY:Santiago Figueroa: Spectroscopy and New Scientific Opportunities at SIRIUS\, part II DESCRIPTION:Thursday September 17: 9 am Seattle\, 12 noon NY\, 5 pm London\, 7 pm Moscow\nlink: https://washington.zoom.us/j/91967881684 \n \n\n\nSirius is one of the first fourth-generation Synchrotron Light Sources to be built in the world and will have the highest brightness among the light sources in the energy range that goes from soft x-rays to hard X-rays with energies up to 20 keV.  The choice and design of the first Sirius beamlines were defined considering three general guidelines\, discussed in the first lecture of this sequence: access to new science\, Improvement to current science\, innovation in strategic areas.\n\n   \nThe second two x-ray absorption beamlines intended for Sirius are in the assembled phase. These two beamlines will enable unprecedented studies to be made in Brazil\, in practically all areas of knowledge\, whether of academic or industrial interest:\n     ** QUATI (QUick X-Ray Absorption Spectroscopy for TIme-Resolved experiments) is a beamline dedicated to high quality X-ray absorption spectroscopy experiments\, in XANES (X-Ray Absorption Near Edge Structure)  and EXAFS (Extended X-ray Absorption Fine Structure) modes\, allowing measurements in the time scale of milliseconds. Multitechnique approach will be performed: XRD\, Raman and IR coupled with XAFS experiments. X-ray Emission Spectroscopy (XES) will be accessible by a Von Hamos spectrometer to enable fast scan acquisition.\n     ** IPÊ (Inelastic and Photo-Electron spectroscopy) is a beamline that will have two experimental stations to allow complementary techniques probing the electronic structure of materials X-Ray Photoelectron Spectroscopy (AP-XPS) and Resonant Inelastic X-Ray Scattering (RIXS). URL:https://xrayabsorption.org/events/figueroa-sirius2/ END:VEVENT BEGIN:VEVENT DTSTART;VALUE=DATE:20200910 DTEND;VALUE=DATE:20200911 DTSTAMP:20260416T013636 CREATED:20200903T152554Z LAST-MODIFIED:20200903T152759Z UID:591-1599696000-1599782399@xrayabsorption.org SUMMARY:Wolfgang Malzer: Principles and applications of laboratory XAS with graphite crystal von Hamos spectrometers DESCRIPTION:The presentation will be at 9 am Seattle (Los Angeles) time (UTC-7). To join this meeting\, use the Zoom links as sent by Jerry Seidler URL:https://xrayabsorption.org/events/journalclub_w_malzer/ END:VEVENT BEGIN:VEVENT DTSTART;VALUE=DATE:20200903 DTEND;VALUE=DATE:20200904 DTSTAMP:20260416T013636 CREATED:20200902T115147Z LAST-MODIFIED:20200903T143853Z UID:584-1599091200-1599177599@xrayabsorption.org SUMMARY:Helio Tolentino and Others: Spectroscopy and New Scientific Opportunities at SIRIUS\, part I DESCRIPTION:The presentation will be at 9 am Seattle (Los Angeles) time (UTC-7). To join this meeting\, use the link: https://washington.zoom.us/j/99543082366   \nSirius is one of the first fourth-generation Synchrotron Light Sources to be built in the world and will have the highest brightness among the light sources in the energy range that goes from soft x-rays to hard X-rays with energies up to 20 keV. \n\nThe choice and design of the first Sirius beamlines were defined considering three general guidelines:\n–Access to New Science: to make the most out of the high brightness of a fourth-generation Synchrotron Light Source to explore techniques such as coherent scattering\, nanofocus and inelastic scattering spectroscopy;\n–Improvement to Current Science: to provide access to enhanced versions of experimental techniques currently available through the high brightness and wide spectrum provided by the Source;\n–Innovation in Strategic Areas: to provide high-tech tools to solve problems in strategic areas for the Country. \n\nThe first 2 x-ray absorption beamlines intended for Sirius are in the assembled phase. These two beamlines will enable unprecedented studies to be made in Brazil\, in practically all areas of knowledge\, whether of academic or industrial interest: \n– Carnauba (Coherent X-rAy NAnoprobe BeAmline) is a beamline for multiple advanced techniques using X-ray absorption\, scattering and emission\, and combining coherent light with nano-focusing. It is the longest of Sirius beamlines\, with 145 meters distance between the light source and the sample environment. This length is required to produce a high optical demagnification and attain a focus size of about 30 nm. \n– EMA (Extreme condition Methods of Analysis) beamline will be dedicated to study samples under extreme thermodynamical conditions by coupling both microfocus (1×1 µm2) and nanofocus (100×100 nm2) beamsizes to x-ray magnetic spectroscopy\, x-ray diffraction and x-ray coherent imaging in multiple experimental instruments\, placed along the beam path for optimization. \n\n  URL:https://xrayabsorption.org/events/sirius-xas/ END:VEVENT BEGIN:VEVENT DTSTART;VALUE=DATE:20200827 DTEND;VALUE=DATE:20200828 DTSTAMP:20260416T013636 CREATED:20200827T134704Z LAST-MODIFIED:20200902T114910Z UID:569-1598486400-1598572799@xrayabsorption.org SUMMARY:Kristjan Kunnus: Probing of coherent nuclear wavepacket dynamics with X-ray emission and scattering in solvated Fe photosensitizers DESCRIPTION:Spin and oxidation state sensitivity of 3d metal K-edge X-ray Emission Spectroscopy (XES) has been utilized in recent years to successfully probe the ultrafast spin transition and electron transfer processes in femtosecond time-resolved experiments [1\,2]. In this talk I will present the results from a combined time-resolved Fe Kα and Kβ XES and X-ray Solution Scattering (XSS) experiment at the LCLS where we investigated photoinduced dynamics in a molecular Fe photosensitizer [Fe(bmip)2]2+ (bmip = 2\,6-bis(3-methyl-imidazole-1-ylidine)-pyridine) [3]. Simultaneous tracking of electronic and nuclear structure allowed us to determine branching of electronic relaxation pathways and observe coherent nuclear dynamics. In particular\, I will discuss the origin of vibronic effects in time-resolved XES experiments and explain how these lead to the sensitivity of XES from nuclear wavepacket dynamics [4]. \nReferences: \n\nZhang et al.\, Nature 7\, 629 (2014). \nK. S. Kjær et al.\, Chem. Sci. 10\, 5749-5760 (2019). \nK. Kunnus et al.\, Nat. Commun. 11\, 634 (2020). https://doi.org/10.1038/s41467-020-14468-w \n M. Vacher et al.\, Struct. Dyn. 7\, 044102 (2020). https://doi.org/10.1063/4.0000022\n\n\n  \n\n  URL:https://xrayabsorption.org/events/journalclub_kunnus/ END:VEVENT BEGIN:VEVENT DTSTART;VALUE=DATE:20200820 DTEND;VALUE=DATE:20200821 DTSTAMP:20260416T013636 CREATED:20200827T134214Z LAST-MODIFIED:20200827T134251Z UID:567-1597881600-1597967999@xrayabsorption.org SUMMARY:M. Darby Dyar: Application of Multivariate Analysis Techniques to Quantitative Interpretation of Valence States in XAS DESCRIPTION:The study of extraterrestrial samples returned from the Moon\, asteroids\, and via meteorites has the potential to inform problems relating to the oxidation states of multivalent cations and the distribution of oxygen in our Solar System. For more than 25 years\, our group has worked to develop XAS methods for analyzing the partial pressure of oxygen in formation environments of tiny returned samples. This problem has application to all materials in which quantitative measurement of valence states is needed. This talk will provide a brief history of measurements of oxidation state in minerals\, and discuss the particular challenges of undertaking calibration data needed for anisotropic materials using a polarized synchrotron beam. We will show how multivariate analysis techniques such as partial least squares can be used to predict valence state and oxygen partial pressure at one-micron scales\, and enable mapping of small grains by selective choice of specific channels. These new methods enable understanding of processes as diverse as lunar volcanic eruptions and lightning strikes in terrestrial deserts. \nReferences: \n\nDyar et al. (2016) Accurate predictions of iron redox state in silicate glasses: A multivariate approach using x-ray absorption spectroscopy. Amer. Mineral.\, 101\, 744-748. https://doi.org/10.2138/am-2016-5555\nDyar et al. (2016) Use of multivariate analysis for synchrotron micro-XANES analysis of iron valence state in amphiboles. Amer. Mineral.\, 101\, 1171-1189. https://doi.org/10.2138/am-2016-5556\nMcCanta et al. (2017) In situ measurement of ferric iron in lunar glass beads using Fe-XAS. Icarus\, 285\, 95-102\, 10.1016/j.icarus.2016.12.029. https://doi.org/10.2138/am-2016-5556\nLanzirotti et al. (2018) Accurate predictions of microscale oxygen barometry in basaltic glasses using vanadium K-edge x-ray absorption spectroscopy: A multivariate approach. Amer. Mineral.\, 103\, 1282-1297.https://doi.org/10.2138/am-2018-6319\nRoberts et al. (2019) Oxidation state of iron in fulgurites and trinitite: Implications for redox changes during abrupt high-temperature and pressure events. Geochim. Cosmochim. Acta\, 266\, 332-350. https://doi.org/10.1016/j.gca.2019.08.021\n\n  URL:https://xrayabsorption.org/events/journalclub_dyar/ END:VEVENT BEGIN:VEVENT DTSTART;VALUE=DATE:20200813 DTEND;VALUE=DATE:20200814 DTSTAMP:20260416T013636 CREATED:20200827T135248Z LAST-MODIFIED:20200827T140155Z UID:572-1597276800-1597363199@xrayabsorption.org SUMMARY:Juanjuan Huang: Energy Dispersive X-ray Absorption Spectroscopy at the Munich Compact Light Source DESCRIPTION:X-ray absorption spectroscopy (XAS) is an important characterization method but has been carried out mostly at large facilities\, limiting the power as a routine characterization for scientific purposes. Therefore\, a lot of effort has been put in developing laboratory XAS using x-ray tubes and other sources. Novel compact x-ray sources based on inverse Compton scattering can generate brilliant hard x-rays in a laboratory setting\, e.g. with a footprint of 7 × 3 m for the one installed at the Munich Compact Light Source (MuCLS). Their low-divergence intense beams with tunable well-defined x-ray energies make them well suited for XAS techniques\, especially for hard x-rays >10 keV. In this talk\, I will briefly introduce the MuCLS facility and a specific XAS setup for such a source. The XAS spectra can be obtained in a short time with great spectral quality. This approach shows great potential to be an efficient and less costly substitute for routine XAS measurements at large facilities. \nReferences: \n\n Huang\, J. et al. Energy-Dispersive X-ray Absorption Spectroscopy with an Inverse Compton Source. Sci. Rep.\, 10\, 8772 (2020). https://doi.org/10.1038/s41598-020-65225-4\n Eggl\, E.\, et al. The Munich Compact Light Source: initial performance measures. J. Synchrotron Rad.\, 23\, 1137-1142 (2016). https://doi.org/10.1107/S160057751600967X\nGünther\, B.\, et al. X-ray beamline of the Munich Compact Light Source. J. Synchrotron Rad.\, 27 (2020). https://doi.org/10.1107/S1600577520008309\n\n  URL:https://xrayabsorption.org/events/journalclub_huang/ END:VEVENT BEGIN:VEVENT DTSTART;VALUE=DATE:20200810 DTEND;VALUE=DATE:20200811 DTSTAMP:20260416T013636 CREATED:20200808T213818Z LAST-MODIFIED:20200827T134919Z UID:555-1597017600-1597103999@xrayabsorption.org SUMMARY:Susan Cumberland: Determining uranium geochemistry within natural organic-matter rich environments using XAS and XFM techniques DESCRIPTION: \nAnalysing metals within environmental samples using wet chemistry can pose analytical problems\, particularly with carbon-based and solid samples. X-ray absorbance spectroscopy (XAS) analysis is one alternative approach\, able to target elements of interest whilst avoiding matrix interference from low mass elements (e.g. carbon). One element that is particularly suited to XAS is uranium (U)\, which is commonly investigated at the L3 edge. Understanding behaviour of U within the environment has been the focus of researchers for many decades\, whether in exploration\, mining\, contamination\, remediation or nuclear. Uranium geochemistry is the same regardless of whether its source is natural\, depleted or as spent fuel\, and the study of U is therefore multifaceted. In general terms\, of the two main oxidation states\, U(IV) and U(VI)\, U(IV) minerals have extremely low solubility\, while U(VI) can be more soluble and therefore potentially mobilised.\n   In my work I have explored the nature of U within ore deposits\, in particular the relationship between U and natural organic matter (OM) using XAS and X-ray fluorescence microscopy (XFM). OM may influence U mobility whether facilitating its pathway through the environment or acting as a sink for U. In the case of the latter\, OM may accumulate U over millennia within sediments or wetlands. Combining techniques from two beamlines at the Australian Synchrotron\, XAS (XANES\, EXAFS) and XFM (element mapping\, µXANES)\, together with laboratory µXRD\, spatial and chemical information were acquired on organically hosted U sediments taken from Mulga Rock Deposit\, Western Australia.\n   Results from XAS on bulk samples revealed how U at Mulga Rock is predominantly U(VI) within the OM sediments. However\, from using µXANES transects across U on pyrite rims\, we observe U(IV) outwardly transitioning to U(VI). Analysis of other features suggest that U has immortalised bacteria as coffinite (USiO4) ellipsoids. Furthermore\, I show from laboratory experiments how OM may immobilise U(VI) rapidly without change in oxidation state. Thus\, challenging traditional views that reduction of U(VI) to U(IV) has to occur for U to be immobilised within OM sediments.  \n\n \nReferences:\n\nCumberland\, S.A.\, Douglas\, G.\, Grice\, K. and Moreau\, J.W.\, 2016. Uranium mobility in organic matter-rich sediments: A review of geological and geochemical processes. Earth-Science Reviews\, 159: 160-185. https://doi.org/10.1016/j.earscirev.2016.05.010\nCumberland\, S.A.\, Etschmann\, B.\, Brugger\, J.\, Douglas\, G.\, Evans\, K.\, Fisher\, L.\, Kappen\, P. and Moreau\, J.W.\, 2018a. Characterization of uranium redox state in organic-rich Eocene sediments. Chemosphere\, 194: 602-613. https://doi.org/10.1016/j.chemosphere.2017.12.012\nCumberland\, S.A.\, Wilson\, S.A.\, Etschmann\, B.\, Kappen\, P.\, Howard\, D.\, Paterson\, D. and Brugger\, J.\, 2018b. Rapid immobilisation of U(VI) by Eucalyptus bark: Adsorption without reduction. Applied Geochemistry\, 96: 1-10. https://doi.org/10.1016/j.apgeochem.2018.05.023.\nCumberland\, SA.\, Evans\, K.\, Douglas\, G.\, de Jonge\, M.\, Fisher\, L.\, Howard\, D.\, Moreau.\, J. Characterisation of uranium-pyrite associations within organic-rich Eocene sediments using EM\, XFM-μXANES and μXRD.  (submitted\, Ore Geology Reviews) URL:https://xrayabsorption.org/events/journalcub_susan_cumberland/ END:VEVENT BEGIN:VEVENT DTSTART;TZID=UTC:20200805T080000 DTEND;TZID=UTC:20200805T170000 DTSTAMP:20260416T013636 CREATED:20200805T221626Z LAST-MODIFIED:20200805T221643Z UID:549-1596614400-1596646800@xrayabsorption.org SUMMARY:Liang Zhang: In situ/operando XAS for energy storage materials DESCRIPTION:Rechargeable batteries (Li-ion batteries and beyond) have received extensive attention as powerful boosters for the development of human society. However\, the application of rechargeable batteries is still hindered by low energy density\, serious voltage hysteresis\, and long-term degradation. Therefore\, it is of great importance for understanding the underlying redox reaction and capacity fading mechanisms to circumvent these problems and improve the overall battery performance. In this talk\, I will mainly talk about the application in-situ/operando X-ray absorption spectroscopy for understanding the electrochemical reaction mechanism of electrode materials of various rechargeable batteries under real operation conditions\, which is an imperative prerequisite for the further optimization of the battery performance.   \n\nReferences:\n\nYan et al.\, Deciphering the Reaction Mechanism of Lithium–Sulfur Batteries by In Situ/Operando Synchrotron-Based Characterization Techniques\, Adv. Energy Mater.\, 2019\, 1900148\, https://doi.org/10.1002/aenm.201900148\nLin et al.\, Synchrotron X‑ray Analytical Techniques for Studying Materials Electrochemistry in Rechargeable Batteries\, Chem. Rev.\, 2017\, 117\, 13123\, https://doi.org/10.1021/acs.chemrev.7b00007\nZhu et al.\, In Situ Probing Multiple-Scale Structures of Energy Materials for Li-Ion Batteries\, Small Methods\, 2019\, 1900223\, https://doi.org/10.1002/smtd.201900223\n\n  \n\n  URL:https://xrayabsorption.org/events/journalclub_liangzhang/ END:VEVENT BEGIN:VEVENT DTSTART;VALUE=DATE:20200730 DTEND;VALUE=DATE:20200731 DTSTAMP:20260416T013636 CREATED:20200621T135910Z LAST-MODIFIED:20200805T221341Z UID:494-1596067200-1596153599@xrayabsorption.org SUMMARY:Thomas Penfold: Towards the Rapid Analysis of XANES for Complex Systems using Deep Neural Networks DESCRIPTION:X-ray spectroscopy delivers strong impact across the physical and biological sciences by providing end users with highly detailed information about the electronic and geometric structure of matter. To decode this information in challenging cases\, e.g.\, in operando catalysts\, batteries\, and temporally evolving systems [1]\, advanced theoretical calculations are necessary. The complexity and resource requirements often render these out of reach for end users\, and therefore\, the data are often not interpreted exhaustively\, leaving a wealth of valuable information unexploited. In this talk\, I will discuss our recently developed method based upon supervised machine learning of X-ray absorption spectra through the development of a deep neural network (DNN) [2]. This DNN is able to estimate Fe K-edge X-ray absorption near-edge structure spectra in less than a second with no input beyond geometric information about the local environment of the absorption site. We predict peak positions with sub-eV accuracy and peak intensities with errors over an order of magnitude smaller than the spectral variations that the model is engineered to capture. I will also discuss its extension to other absorption edges\, the properties of the network and also highlights areas on which future developments should focus. \nReferences: \n\n C. J. Milne\, T. J. Penfold and M. Chergui Coord. Chem. Rev. 277\, 44-68 (2014).\nC. D. Rankine\, M. M. M. Madkhali\, and T. J. Penfold J. Phys. Chem. A 2020\, 124\, 21\, 4263?4270 URL:https://xrayabsorption.org/events/journalclub-thomas-penfold/ CATEGORIES:XAFS Journal Club END:VEVENT BEGIN:VEVENT DTSTART;VALUE=DATE:20200727 DTEND;VALUE=DATE:20200729 DTSTAMP:20260416T013636 CREATED:20200621T135456Z LAST-MODIFIED:20200727T030303Z UID:492-1595808000-1595980799@xrayabsorption.org SUMMARY:Andy Aquila: The Tender X-ray Imaging (TXI) instrument at the LCLS DESCRIPTION:This presentation will take place at 6 pm Monday\, Seattle (Los Angeles) time / 9 am Tuesday\, Beijing time using Zoom. For the Zoom link and password\, visit  https://tinyurl.com/XAFStalks  within 30 minutes of the beginning of the presentation. \nThe Linac Coherent Light Source (LCLS) upgrade to a high repetition source offers new avenues to pump/probe X-ray spectroscopies. Here I will briefly introduce the new capabilities of the LCLS focusing on the Tender X-ray Instrument (TXI). The TXI instrument is a dual-beam instrument\, fed by both the soft X-ray and hard X-ray undulators of LCLS; a feature currently unique among XFEL instruments. The tender x-ray instrument will enable x-ray pump/x-ray probe techniques especially in the emerging field of nonlinear x-ray science\, support tender X-ray spectroscopy measurements\, and provide a coherent scattering/ forward diffraction instrument for sub-micron samples. It is designed to accommodate a variety of additional techniques\, such as absorption and photoemission spectroscopy\, as well as an array of samples from fixed targets to gases\, aerosols\, and liquid jet targets. \n\nAbbamonte\, et al.\, New Science Opportunities Enables by LCLS-II X-ray Lasers https://portal.slac.stanford.edu/sites/lcls_public/Documents/LCLS-IIScienceOpportunities_final.pdf\nhttps://lcls.slac.stanford.edu/instruments/neh-1-2 URL:https://xrayabsorption.org/events/journalclub-andy-aquila/ CATEGORIES:XAFS Journal Club END:VEVENT BEGIN:VEVENT DTSTART;VALUE=DATE:20200723 DTEND;VALUE=DATE:20200724 DTSTAMP:20260416T013636 CREATED:20200621T135236Z LAST-MODIFIED:20200727T030438Z UID:490-1595462400-1595548799@xrayabsorption.org SUMMARY:Matthew Marcus: Soft x-ray spectromicroscopy in extraterrestrial materials DESCRIPTION:Extraterrestrial materials such as meteorites and interplanetary dust particles are often very complex and non-uniform\, with diverse species within a small sample. In some cases\, especially for the products of sample-return missions\, the available samples are small and precious. X-ray micro- and nano-spectroscopy are ideal complements to other methods such as TEM and nano-SIMS. In this talk\, I will review several examples from the literature showing how X-ray spectromicroscopy has been used to study extraterrestrial materials and infer their histories of formation and alteration. I will also review some experimental techniques\, especially STXM. \nReferences: \n\nSandford\, Scott A.\, et al. “Organics captured from comet 81P/Wild 2 by the Stardust spacecraft.” Science 314\, no. 5806 (2006): 1720-1724.\nLo\, Yuan Hung\, et al. “Multimodal x-ray and electron microscopy of the Allende meteorite.” Science advances 5\, no. 9 (2019): eaax3009.\nVan Aken\, P. A.\, and B. Liebscher. “Quantification of ferrous/ferric ratios in minerals: new evaluation schemes of Fe L 23 electron energy-loss near-edge spectra.” Physics and Chemistry of Minerals 29\, no. 3 (2002): 188-200. URL:https://xrayabsorption.org/events/journalclub-matthew-marcus/ CATEGORIES:XAFS Journal Club END:VEVENT BEGIN:VEVENT DTSTART;VALUE=DATE:20200720 DTEND;VALUE=DATE:20200722 DTSTAMP:20260416T013636 CREATED:20200621T134914Z LAST-MODIFIED:20200727T030541Z UID:488-1595203200-1595375999@xrayabsorption.org SUMMARY:Li Song: Soft X-ray endstaions at the Hefei Light Source and some applications of XAS DESCRIPTION:Hefei Light Source (HLS) is the first dedicated synchrotron radiation facility in China with electron ring energy of 0.8 Gev\, which is located on the West Campus of the University of Science and Technology of China (USTC). With the completion of twice constructions and recent upgradation\, HLS become a fully upgraded soft X-ray synchrotron radiation facility\, now operating ten experimental stations (Infrared Spectroscopy and Microspectroscopy\, Combustion and Flame\, Mass Spectrometry\, Soft X-ray Microscopy\, Spectral Radiation Standard and Metrology\, Atomic & Molecular Physics\, Photoemission Spectroscopy\, Catalysis and Surface Science\, X-Ray Magnetic Circular Dichroism\, Angle-resolved Photoemission Spectroscopy) [1]. The well-designed beamlines and experimental stations at HLS\, together with the Shanghai synchrotron Radiation Facility and the Beijing Synchrotron Radiation Facility\, allow us to perform cutting edge scientific experiments. Here\, I will briefly introduce the soft X-ray endstations at HLS\, and present our recent studies based on X-ray absorption techniques. In particular\, two progress will be discussed: (1) adopt the rational atom-binding strategy and develop the method of precise nano-confined synthesis\, subsequently establish the structure-property relationships in several functional nanomaterials anchored with single atoms by combining synchrotron XAS and XPS [2-5]; (2) propose the controllable ion-intercalating and ion-exchanging strategies and develop the method of in-situ reconstructed synthesis\, eventually clarify the working mechanism of cation-/anion-modulated functional nanomaterials by the means of operando XAS with synchrotron-on-line devices[6-9]. \n  \nReferences: \n\nhttp://en.nsrl.ustc.edu.cn/main.htm\n\nAtomically dispersed platinum supported on curved carbon supports for efficient electrocatalytic hydrogen evolution\, Nature Energy\, 2019\, 4:512-518. https://doi.org/10.1038/s41560-019-0402-6\n\nAchieving Efficient Alkaline Hydrogen Evolution Reaction over a Ni5P4 Catalyst Incorporating Single-Atomic Ru Sites\, Advanced Materials\, 2020\, 32:1906972. https://doi.org/10.1002/adma.201906972\n\nElectrochemical Conversion of CO2 to Syngas with Controllable CO/H2 Ratios over Co and Ni Single-Atom Catalysts\, Angewandte Chemie International Edition\, 2020\, 59:3033-3037. https://doi.org/10.1002/anie.201912719\n\nSingle Nickel Atoms on Nitrogen-Doped Graphene Enabling Enhanced Kinetics of Lithium-Sulfur Batteries\, Advanced Materials\, 2019\, 31:1903955. https://doi.org/10.1002/adma.201903955\n\nStable Metallic 1T-WS2 Nanoribbons Intercalated with Ammonia Ions: The Correlation between Structure and Electrical/Optical Properties\, Advanced Materials\, 2015\, 27:4837-4844. https://doi.org/10.1002/adma.201502134\n\nAtomic Cobalt Covalently Engineered Interlayers for Superior Lithium-Ion Storage\, Advanced Materials\, 2018\, 30:1802 https://doi.org/10.1002/adma.201802525525.\n\nTracking Structural Self-Reconstruction and Identifying True Active Sites toward Cobalt Oxychloride Precatalyst of Oxygen Evolution Reaction\, Advanced Materials\, 2019\, 31:1805127. https://doi.org/10.1002/adma.201805127\n\nAtomic Sn4+ Decorated into Vanadium Carbide MXene Interlayers for Superior Lithium Storage\, Advanced Energy Materials\, 2018\, 9:1802977. https://doi.org/10.1002/aenm.201802977 \n\n\n  URL:https://xrayabsorption.org/events/journalclub-li-song/ CATEGORIES:XAFS Journal Club END:VEVENT BEGIN:VEVENT DTSTART;VALUE=DATE:20200716 DTEND;VALUE=DATE:20200717 DTSTAMP:20260416T013636 CREATED:20200621T134547Z LAST-MODIFIED:20200720T012215Z UID:486-1594857600-1594943999@xrayabsorption.org SUMMARY:Hao Yuan: Ptychography and 4D imaging by spectro-ptycho-tomography DESCRIPTION:Coherent X-ray scattering (diffraction) methods will be key to exploiting the high coherent flux of 4th generation synchrotron sources. Ptychography is a coherent diffraction technique that allows rapid\, reliable inversion of arrays of diffraction images into real space images by using overlapping spatial areas to constrain the reconstruction [1]. While ptychography is quite well developed in the hard X-ray regime and in electron and optical microscopy\, the implementation of soft X-ray ptychography is in its infancy. Soft X-ray ptychography is a coherent diffraction imaging technique readily implemented in Scanning Transmission X-ray Microscopy (STXM) [2]. 4D imaging by soft X-ray ptychography – chemically specific\, quantitative 3D mapping of nanostructures can provide insight into the physical and chemical properties. By measuring spectro-ptycho-tomography – 2D ptychographic images at multiple photon energies and multiple tilt angles – 3D chemical distribution can be derived [3]. \nReferences: \n\nPfeiffer F. X-ray ptychography. Nature Photonics\, 2018\, 12(1): 9-17. https://doi.org/10.1038/s41566-017-0072-5\n\nShapiro D A\, Yu Y S\, Tyliszczak T\, et al. Chemical composition mapping with nanometre resolution by soft X-ray microscopy. Nature Photonics\, 2014\, 8(10): 765-769. \nWu J\, Zhu X\, Shapiro D A\, et al. Four-dimensional imaging of ZnO-coated alumina aerogels by scanning transmission X-ray microscopy and ptychographic tomography. The Journal of Physical Chemistry C\, 2018\, 122(44): 25374-25385. https://pubs.acs.org/doi/abs/10.1021/acs.jpcc.8b07363\n\n\n  URL:https://xrayabsorption.org/events/journalclub-hao-yuan/ CATEGORIES:XAFS Journal Club END:VEVENT BEGIN:VEVENT DTSTART;VALUE=DATE:20200713 DTEND;VALUE=DATE:20200715 DTSTAMP:20260416T013636 CREATED:20200522T144512Z LAST-MODIFIED:20200720T012040Z UID:430-1594598400-1594771199@xrayabsorption.org SUMMARY:Wantana Klysubun: XAS capability and science at the Thailand synchrotron DESCRIPTION: URL:https://xrayabsorption.org/events/journalclub-wantana-klysubun/ CATEGORIES:XAFS Journal Club END:VEVENT BEGIN:VEVENT DTSTART;VALUE=DATE:20200709 DTEND;VALUE=DATE:20200710 DTSTAMP:20260416T013636 CREATED:20200522T144257Z LAST-MODIFIED:20200714T010724Z UID:427-1594252800-1594339199@xrayabsorption.org SUMMARY:Dooshaye Moonshiram: Electronic and Structural Configurations of Earth-Abundant Water Splitting Catalysts and Spin Crossover Complexes DESCRIPTION:The solar light-driven splitting of water for hydrogen fuel production is a promising alternative to fossil fuels due to their rapid depletion and concomitant environmental pollution. The design of light-driven devices composed of organic\, inorganic or hybrid materials that can mimic natural photosynthetic processes is extremely desirable. An essential component of such systems is the light-harvesting chromophore\, analogous to the photosynthetic pigments\, which can absorb the energy of the incident photons. Consequently\, the light energy is converted into an electronically excited state for the creation of a charge-separated state that helps to generate the required thermodynamic driving force for subsequent catalytic reactions. \nCommonly used molecular photosensitizers traditionally contain precious and scarce 4d or 5d transition metals such as Platinum\, Ruthenium\, Rhenium or Iridium. However\, over the past decades\, a range of noble metal-free photosensitizers based on earth-abundant metals such as Copper\, Chromium\, and Zinc appeared\, with the aim to bring these light-harvesting molecules into more practical applications. A systematic series novel homo- and heteroleptic Cu(I) photosensitizers based on tetradentate 1\,10-phenanthroline ligands of the type X^N^N^X containing two additional donor moieties in the 2\,9-position (X = SMe or OMe) were designed. Time-resolved X-ray absorption spectroscopy in the picosecond time scale\, coupled with time-dependent density functional theory calculations\, provided in-depth information on the excited state electron configurations. For the first time\, a significant shortening of the Cu-X distance and a change in the coordination mode to a pentacoordinated geometry is shown in the excited states of the two homoleptic complexes. These findings are important with respect to a precise understanding of the excited state structures and a further stabilization of this type of photosensitizers. This talk will further demonstate the reaction pathways of several cobalt and nickel-based hydrogen evolving complexes\, examined in unprecedented detail with picosecond time resolution when coupled with copper and ruthenium-based photosensitizers. Results shown will enable the rational design of molecular hydrogen-evolving photocatalysts that can perform beyond the current microsecond time scale\, and suggest ways in which the ligand structures can be adjusted to facilitate protonation and catalytic efficiency.\n \nReferences: \n\nIglesias et al\, Tracking Light-Induced Excited-State Dynamics…. Chem Eur J 2020 https://doi.org/10.1002/chem.202001393\nMoonshiram et al Tracking Structural and Electronic Configurations… JACS 2016 https://doi.org/10.1021/jacs.6b05680\nGotica et al Spectroscopic Characterization of a Bio-inspired … Chem Eur J 2019 https://doi.org/10.1002/chem.201904934\nRentschler Coordination Behavior of Cu(I) Photosensitizers… Chem Eur J 2019 https://doi.org/10.1002/chem.201905601\n\n  URL:https://xrayabsorption.org/events/journalclub-dooshaye-moonshiram/ CATEGORIES:XAFS Journal Club END:VEVENT BEGIN:VEVENT DTSTART;VALUE=DATE:20200706 DTEND;VALUE=DATE:20200708 DTSTAMP:20260416T013636 CREATED:20200522T144124Z LAST-MODIFIED:20200714T011003Z UID:425-1593993600-1594166399@xrayabsorption.org SUMMARY:Chris Glover: Australian XAFS: Past\, present\, and a Br-ght future DESCRIPTION:The Australian XAFS community started from small beginnings and currently\, XAFS is one of the most oversubscribed techniques at the Australian Synchrotron. The community has been fostered by access to facilities; initially the Australian National Beamline Facility (ANBF) at the Photon Factory\, to more recently the XAS beamline at the Australian Synchrotron. The ANBF was a simple and versatile\, non focussed bend magnet beamline\, which was retired in ~ 2010. The XAS beamline is a Wiggler based\, focussed beamline\, with much greater flux and high photon energies\, and has been operational since 2007. User demand has resulted in two new beamlines\, currently under construction at the Australian Synchrotron – the Medium Energy X-Ray Absorption Spectroscopy Beamlines (MEX 1 and 2). These beamlines share a bend magnet\, and are aimed to cover the Tender and medium energy range with differing beamsizes – from microns’s to mm’s. MEX will be equipped with 4 endstations in total\, including a microprobe\, a 5 crystal Rowland circle spectrometer and a custom low energy X-Ray spectrometer. \n\nI this talk\, I will briefly describe the past\, present and the bright future of XAFS in the Australian context. I will briefly summarise the ANBF\, the capabilities and performance of the XAS beamline and highlight the scientific opportunities and complementary nature of the new MEX beamlines.\n \nReferences: \n\nhttps://www.nature.com/articles/srep20350\nhttps://pubs.acs.org/doi/10.1021/cn200097s\nhttps://pubs.acs.org/doi/10.1021/acs.biochem.5b01136\nhttps://www.ansto.gov.au/user-access/instruments/australian-synchrotron-beamlines/x-ray-absorption-spectroscopy\nhttps://www.ansto.gov.au/research/facilities/australian-synchrotron/project-br-ght\n\n  URL:https://xrayabsorption.org/events/journalclub-chris-glover/ CATEGORIES:XAFS Journal Club END:VEVENT BEGIN:VEVENT DTSTART;VALUE=DATE:20200702 DTEND;VALUE=DATE:20200703 DTSTAMP:20260416T013636 CREATED:20200522T143805Z LAST-MODIFIED:20200705T154542Z UID:423-1593648000-1593734399@xrayabsorption.org SUMMARY:Yuanyuan Li: Multimodal approach for determining the electronic and atomic structure of ceria supported Pt single atoms catalyst DESCRIPTION:Single atoms catalysts (SACs) have been heavily investigated in the recent years because of their good catalytic properties (especially activity and selectivity) for many chemical reactions [1]. In addition to that\, in SACs\, the supported metals are used with extremely high efficiency compared to their nano counterparts. That is very important for noble metals\, which are naturally scare yet widely used in industry for a vast number of important chemical reactions. Despite of the progress that has been made\, there are fundamental questions remained unaddressed: what is the structure (electronic and atomic) that responsible for the improved catalytic properties? How does the structure respond to the reaction environment? Only by addressing these questions\, are we able to improve synthesis processes to get desired catalysts. \nThe key to address the above-mentioned questions is the capability of characterizing the structure of single atoms catalysts. The challenge originates from: 1) for SACs\, the weight loading of single atoms on the support is usually low\, 2) the heterogeneity of the single atom sites owing to the surface heterogeneity of most solid supports\, and 3) the complex structure of the single atoms system resulted from the strong correlation between the single atoms and the support. This work aimed to address those issues by developing synthesis methods for obtaining homogeneously distributed single atoms with high weight loadings and combining multiple experimental techniques (STEM\, DRIFTS\, XPS\, RIXS\, XAS) with calculation methods to study the electronic and atomic structure of single atoms with the presence of strong metal-support interactions. For demonstration\, the specific system studied here is ceria supported Pt single atoms [2]. \nReferences: \n\nA. Wang\, J. Li\, T. Zhang\, Heterogeneous single-atom catalysis. Nature Reviews Chemistry 2\, 65–81 (2018). https://doi.org/10.1038/s41570-018-0010-1\n\nM. Kottwitz\, Y. Li\, R. M. Palomino\, Z. Liu\, Q. Wu\, G. Wang\, J. Huang\, J. Timoshenko\, S. D. Senanayake\, M. Balasubramanian\, D. Lu\, R. G. Nuzzo\, A. I. Frenkel\, Local structure and electronic state of atomically dispersed Pt on nanosized CeO2 support\, ACS Catalysis 9\, 8738-8748 (2019). https://doi.org/10.1021/acscatal.9b02083\n\n\n  URL:https://xrayabsorption.org/events/journalclub-yuanyuan-li/ CATEGORIES:XAFS Journal Club END:VEVENT BEGIN:VEVENT DTSTART;VALUE=DATE:20200629 DTEND;VALUE=DATE:20200630 DTSTAMP:20260416T013636 CREATED:20200522T143648Z LAST-MODIFIED:20200630T151555Z UID:421-1593388800-1593475199@xrayabsorption.org SUMMARY:Feng Lin: Ion Reactions to Modulate Solid-State Electrochemistry for Batteries and Electrocatalysis DESCRIPTION:Ion reactions offer a huge playground for tuning the electronic and crystal properties of inorganic solids for energy applications. Our research focuses on resolving a longstanding question in materials electrochemistry regarding redox active solids: how does the mesoscale chemical distribution influence ion reactions at different length scales? Through manipulating the thermodynamics and kinetics of the ion intercalation chemistry\, our goal is to develop experimental methodologies and establish novel design principles to enhance the electrochemical properties of ion-intercalating solids for batteries and electrocatalysis. Our studies are largely facilitated by synchrotron X-ray spectroscopic and imaging techniques that provide fundamental insights into intercalation chemistries. In this presentation\, we will first highlight our recent progress in understanding and improving electrode materials for lithium and sodium batteries. We design novel synthetic approaches to overcome the surface challenges of oxide cathode materials for high energy density\, high power density and long cycle life. Then\, we will discuss how we make use of interfacial ion reactions to modulate the electronic properties of water splitting electrocatalysts. We will highlight that tailoring the phase segregation at the catalyst-electrolyte interface constitutes a large space for stabilizing catalytic activity. \n  URL:https://xrayabsorption.org/events/journalclub-feng-lin/ CATEGORIES:XAFS Journal Club END:VEVENT END:VCALENDAR