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PRODID:-//Memento EPFL//
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SUMMARY:Crystal structure determination by 3D electron diffraction
DTSTART:20220519T140000
DTEND:20220519T153000
DTSTAMP:20260406T152957Z
UID:b4e9d8a23411fde8643941da083154b8c62bde2b706bd67d3434927f
CATEGORIES:Conferences - Seminars
DESCRIPTION:Dr. Lukas Palatinus\, Czech Academy of Sciences\n3D electron 
 diffraction (ED) is a crystallographic technique allowing structure analys
 is from single submicrometric crystals. This technique was born almost two
  decades ago\, but it is now going through a phase of explosive developmen
 t. Some eight years ago its general applicability and achievable accuracy 
 was still a matter of debates. Five years ago\, first reports showing reli
 able localization of hydrogen atoms by 3D ED appeared\, and refinements wi
 th figures of merit approaching those of X-ray diffraction became possible
 . Today\, observation of hydrogens and other structural details is conside
 red routine\, and advanced applications like charge density analysis from 
 3D ED data are emerging.\nThe webinar will give a brief overview of the de
 velopment of the technique and then it will focus on the challenges techni
 que poses from the experimental and data-processing point of view. An over
 view of applications will be given cover materials ranging from intermetal
 lic alloys including precipitates through multiphasic mineralogical sample
 s all the way to hydrated materials\, MOFs and complex organic materials. 
 The determination of absolute structure by electron crystallography will a
 lso be discussed. It will be shown that 3D ED is ripe enough to be immedia
 tely useful for material scientists and chemists who need crystallographic
  characterisation of microcrystalline materials\, but it is also young eno
 ugh to offer exciting opportunities for any material scientist wishing to 
 contribute to its development. \n\n\nBiography:\nLukas Palatinus studied 
 mineralogy and geochemistry at the Charles University in Prague. During hi
 s PhD. At the University Bayreuth\, Germany he focused on the crystallogra
 phic analysis of modulated structures. Later\, during the post-doc stay at
  the EPFL\, Lausanne\, Switzerland\, he developed the program Superflip fo
 r the solution of the crystallographic phase problem for periodic and aper
 iodic crystals\, using iterative dual space algorithms. \nSince 2009\, Dr
 . Palatinus is the head of the group of electron crystallography at the In
 stitute of Physics of the Czech Academy of Sciences in Prague. He and his 
 co-workers are developing methods for crystal structure analysis from elec
 tron diffraction data\, with the main focus is on the structure refinement
  from 3D electron diffraction tomography data using the dynamical diffract
 ion theory.\n 
LOCATION:https://epfl.zoom.us/j/2019908135
STATUS:CONFIRMED
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