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@INPROCEEDINGS{Feygenson:889197,
author = {Feygenson, Mikhail and Nandakumaran, Nileena},
title = {{U}sing {N}eutron and {X}-ray {P}air-{D}istribution
{F}unction {M}ethod for {S}tructural {S}tudies of
{N}anoparticles},
reportid = {FZJ-2021-00107},
year = {2020},
abstract = {Pair-distribution function (PDF) analysis of total neutron
scattering data has proved tobe an indispensable tool for
scientists to determine the local crystal structure
ofnanoparticles that often differs in significant ways from
their bulk counterparts. The PDFanalysis provides
quantitative information about arrangement of atoms on
atomic scale,enabling studies of defects, surface
relaxations and local disorder in nanoparticles. Inthis
talk, I will give an introduction to the method, including
practical aspects of datareduction and data corrections. I
will briefly present several software solutions for thePDF
data analysis. The differences between neutron and x-ray PDF
measurements andtheir advantages for studies of
nanoparticles will be discussed. The PDFinstrumentation
available to users at large-scale neutron and synchrotron
facilitiesaround the globe will be reviewed. I will focus on
three examples that amplifyimportance of the PDF analysis in
nanoparticle research. They include PDF studies ofcoated Co
nanoparticles1, exchange biased Au-Fe3O4 dumbbells2 and
GaN/ZnOnanoparticles3 used in the visible-light
photocatalysis. In the last part of the talk JCNS-2PhD
student Nileena Nandakumaran will reflect on her experience
on performingsynchrotron x-ray PDF measurements on
iron-oxide nanoparticles. As a first time user,she will
share her overall experience on challenges of collecting PDF
data and onrunning remote PDF experiments, which has been
becoming more and more importantduring these days.1
Feygenson, M., Formo, E. V., Freeman, K., Schieber, N., Gai,
Z., $\&$ Rondinone, A. J. Implications of RoomTemperature
Oxidation on Crystal Structure and Exchange Bias Effect in
Co/CoO Nanoparticles. Journalof Physical Chemistry C,
119(46), 26219–26228 (2015).2 Feygenson, M., Bauer, J. C.,
Gai, Z., Marques, C., Aronson, M. C., Teng, X., Su, D.,
Stanic, V., Urban, V. S.,Beyer, K. A., $\&$ Dai, S. Exchange
bias effect in Au-Fe3 O4 dumbbell nanoparticles induced by
the chargetransfer from gold. Physical Review B - Condensed
Matter and Materials Physics, 92(5), 1–13 (2015).3
Feygenson, M., Neuefeind, J. C., Tyson, T. A., Schieber, N.,
$\&$ Han, W. Q. Average and Local CrystalStructures of
(Ga1-xZnx)(N1-xOx) Solid Solution Nanoparticles. Inorganic
Chemistry, 54(23), 11226–11235 (2015).},
month = {Dec},
date = {2020-12-17},
organization = {Digital Institute Seminar JCNS-2,
online event (online event), 17 Dec
2020 - 17 Dec 2020},
subtyp = {Invited},
cin = {JCNS-2 / PGI-4 / JARA-FIT / JCNS-1},
cid = {I:(DE-Juel1)JCNS-2-20110106 / I:(DE-Juel1)PGI-4-20110106 /
$I:(DE-82)080009_20140620$ / I:(DE-Juel1)JCNS-1-20110106},
pnm = {144 - Controlling Collective States (POF3-144) / 524 -
Controlling Collective States (POF3-524) / 6212 - Quantum
Condensed Matter: Magnetism, Superconductivity (POF3-621) /
6213 - Materials and Processes for Energy and Transport
Technologies (POF3-621) / 6G4 - Jülich Centre for Neutron
Research (JCNS) (POF3-623)},
pid = {G:(DE-HGF)POF3-144 / G:(DE-HGF)POF3-524 /
G:(DE-HGF)POF3-6212 / G:(DE-HGF)POF3-6213 /
G:(DE-HGF)POF3-6G4},
typ = {PUB:(DE-HGF)31},
url = {https://juser.fz-juelich.de/record/889197},
}