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:20260621
DTEND;VALUE=DATE:20260627
DTSTAMP:20260422T222126
CREATED:20250516T141707Z
LAST-MODIFIED:20260209T143230Z
UID:1005-1782000000-1782518399@xrayabsorption.org
SUMMARY:XAFS19 (XAFS 2026)
DESCRIPTION:The 19th International XAFS conference in 2026 in Chiang Mai\, Thailand\nXAFS 2026\, The 19th International XAFS Conference (XAFS2026) will be held in Thailand\, from June 21 to June 26\, 2026\nVenue: The Empress Convention Center and Hotel\, Chiang Mai.\nWebsite: http://www.xafs2026.org/\nOrganizer: Synchrotron Light Research Institute\nConference Chair: Wantana Klysubun \nThe abstract submission deadline for “Poster Presentation” has been extended to 28 February 2026. \n(XAFS2025 is cancelled.) \n 
URL:https://xrayabsorption.org/events/xafs19-xafs-2026/
LOCATION:Chiang Mai\, Thailand\, The Empress Convention Center and Hotel\, Chiang Mai\, Thailand
CATEGORIES:XAFS Conference
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20250714
DTEND;VALUE=DATE:20250720
DTSTAMP:20260422T222126
CREATED:20240619T091115Z
LAST-MODIFIED:20250415T084825Z
UID:884-1752451200-1752969599@xrayabsorption.org
SUMMARY:Announcement regarding XAFS19 (XAFS 2025)
DESCRIPTION:Cancellation of the 19th International XAFS conference in 2025 in Chicago\nDear all involved with XAFS\, \nAs you may know\, the 19th International XAFS conference (XAFS 19) was scheduled to occur in Chicago from the 14th to the 19th of July 2025. \nAfter considering the many uncertainties with hosting an international conference in the US given the current political climate\, the organizer of the 19-XAFS conference proposed its postponement. The IXAS EC voted on the subject and unanimously voted to cancel the 19-XAFS in Chicago in 2025. We appreciate your kind understanding. \nWe will now call for a bid to host the conference next year\, XAFS 2026\, and we will decide on the new venue and communicate the decision to the community as soon as possible. Please contact the IXAS chair\, Kiyotaka Asakura (kytkaskr@fc.ritsumei.ac.jp)\, if you are interested in organizing the XAFS 2026. \nThe deadline of the bid paper submission is 23:59 JST on 22 April. \nThanks. \nKiyotaka Asakura IXAS Chair \nCarlo Segre Chair of the 19-XAFS \nSee https://www.icdd.com/xafs19/ for more details.
URL:https://xrayabsorption.org/events/xafs-2025/
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20250204
DTEND;VALUE=DATE:20250607
DTSTAMP:20260422T222126
CREATED:20250204T034937Z
LAST-MODIFIED:20250204T034937Z
UID:982-1738627200-1749254399@xrayabsorption.org
SUMMARY:Call for International XAFS Conference 2028 (Deadline June 1\, 2025).
DESCRIPTION:IXAS Conference Selection \n \nPlease follow the link above for the details.
URL:https://xrayabsorption.org/events/call-for-international-xafs-conference-2028-deadline-june-1-2025/
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20250130
DTEND;VALUE=DATE:20250502
DTSTAMP:20260422T222126
CREATED:20250204T033256Z
LAST-MODIFIED:20250415T132229Z
UID:970-1738195200-1746143999@xrayabsorption.org
SUMMARY:On IXAS Awards for 2025
DESCRIPTION:IXAS Awards \n \nCurrently IXAS Award for 2025 applications are suspended because of the cancellation of XAFS-19.
URL:https://xrayabsorption.org/events/open-for-ixas-awards-deadline-may-1-2025/
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20240701
DTEND;VALUE=DATE:20241001
DTSTAMP:20260422T222126
CREATED:20240521T115739Z
LAST-MODIFIED:20240721T184657Z
UID:870-1719792000-1727740799@xrayabsorption.org
SUMMARY:Q2XAFS 2024
DESCRIPTION:Q2XAFS 2024: On-line July to September\, 2024 \nThe International Workshop on Improving Data Quality and Quantity in XAFS Spectroscopy (Q2XAFS2024) will be held online between July to September\, 2024. \nQ2XAFS\, Quality and Quantity for XAS\, is a conference/workshop series in which expert users and world leaders in X-ray spectroscopy are invited to present an overview of the latest developments and discuss collaborative efforts in response to arising opportunities/challenges in the field. The latest iteration of the Q2XAFS was run at the Australian Synchrotron\, ANSTO\, as a satellite of the IUCr Congress 2023 in Melbourne\, Australia. Working group activities have started to give recommendations in the International XAFS Conference in 2025 in Chicago\, USA. \nor more details\, see:  Q2XAFS2024 and  Q2XAFS2024 (external).
URL:https://xrayabsorption.org/events/q2xafs-2024/
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20231101
DTEND;VALUE=DATE:20231104
DTSTAMP:20260422T222126
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:20260422T222126
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:20260422T222126
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:20260422T222126
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:20260422T222126
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:20260422T222126
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:20260422T222126
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:20260422T222126
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:20260422T222126
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:20260422T222126
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:20260422T222126
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:20260422T222126
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:20260422T222126
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:20260422T222126
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:20260422T222126
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:20260422T222126
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:20260422T222126
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:20260422T222126
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:20260422T222126
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:20260422T222126
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:20260422T222126
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:20260422T222126
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:20260422T222126
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:20260422T222127
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:20260422T222127
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
END:VCALENDAR