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@ARTICLE{Niederdraenk:16364,
author = {Niederdraenk, F. and Seufert, K. and Stahl, A. and
Bhalerao-Panajkar, R.S. and Marathe, S. and Kulkarni, S.K.
and Neder, R.B. and Kumpf, C.},
title = {{E}nsemble modeling of very small {Z}n{O} nanoparticles},
journal = {Physical Chemistry Chemical Physics},
volume = {13},
issn = {1463-9076},
address = {Cambridge},
publisher = {RSC Publ.},
reportid = {PreJuSER-16364},
pages = {498 - 505},
year = {2011},
note = {We thank the Volkswagen Stiftung (project I/78 909) and the
Deutsche Forschungsgemeinschaft (DFG, SFB 410) for financial
support. Technical assistance by the HASYLAB staff is also
acknowledged. The project was supported by the IHP program
"Access to Research Infrastructures" of the European
Commission (HPRI-CT-1999-00040).},
abstract = {The detailed structural characterization of nanoparticles
is a very important issue since it enables a precise
understanding of their electronic, optical and magnetic
properties. Here we introduce a new method for modeling the
structure of very small particles by means of powder X-ray
diffraction. Using thioglycerol-capped ZnO nanoparticles
with a diameter of less than 3 nm as an example we
demonstrate that our ensemble modeling method is superior to
standard XRD methods like, e.g., Rietveld refinement.
Besides fundamental properties (size, anisotropic shape and
atomic structure) more sophisticated properties like
imperfections in the lattice, a size distribution as well as
strain and relaxation effects in the particles and-in
particular-at their surface (surface relaxation effects) can
be obtained. Ensemble properties, i.e., distributions of the
particle size and other properties, can also be investigated
which makes this method superior to imaging techniques like
(high resolution) transmission electron microscopy or atomic
force microscopy, in particular for very small
nanoparticles. For the particles under study an excellent
agreement of calculated and experimental X-ray diffraction
patterns could be obtained with an ensemble of anisotropic
polyhedral particles of three dominant sizes, wurtzite
structure and a significant relaxation of Zn atoms close to
the surface.},
keywords = {Metal Nanoparticles: chemistry / Models, Molecular /
Particle Size / X-Ray Diffraction / Zinc Oxide: chemistry /
Zinc Oxide (NLM Chemicals) / J (WoSType)},
cin = {PGI-3 / JARA-FIT},
ddc = {540},
cid = {I:(DE-Juel1)PGI-3-20110106 / $I:(DE-82)080009_20140620$},
pnm = {Grundlagen für zukünftige Informationstechnologien},
pid = {G:(DE-Juel1)FUEK412},
shelfmark = {Chemistry, Physical / Physics, Atomic, Molecular $\&$
Chemical},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:21060929},
UT = {WOS:000285390400018},
doi = {10.1039/c0cp00758g},
url = {https://juser.fz-juelich.de/record/16364},
}