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@ARTICLE{Stroppa:201763,
author = {Stroppa, Daniel and Montoro, Luciano A. and Campello,
Antonio and Gracia, Lourdes and Beltrán, Armando and
Andrés, Juan and Leite, Edson R. and Ramirez, Antonio J.},
title = {{P}rediction of dopant atom distribution on nanocrystals
using thermodynamic arguments},
journal = {Physical chemistry, chemical physics},
volume = {16},
number = {3},
issn = {1463-9084},
address = {Cambridge},
publisher = {RSC Publ.},
reportid = {FZJ-2015-04057},
pages = {1089 - 1094},
year = {2014},
abstract = {A theoretical approach aiming at the prediction of
segregation of dopant atoms on nanocrystalline systems is
discussed here. It considers the free energy minimization
argument in order to provide the most likely dopant
distribution as a function of the total doping level. For
this, it requires as input (i) a fixed polyhedral geometry
with defined facets, and (ii) a set of functions that
describe the surface energy as a function of dopant content
for different crystallographic planes. Two Sb-doped SnO2
nanocrystalline systems with different morphology and dopant
content were selected as a case study, and the calculation
of the dopant distributions expected for them is presented
in detail. The obtained results were compared to previously
reported characterization of this system by a combination of
HRTEM and surface energy calculations, and both methods are
shown to be equivalent. Considering its application
pre-requisites, the present theoretical approach can provide
a first estimation of doping atom distribution for a wide
range of nanocrystalline systems. We expect that its use
will support the reduction of experimental effort for the
characterization of doped nanocrystals, and also provide a
solution to the characterization of systems where even
state-of-art analytical techniques are limited.},
cin = {PGI-5},
ddc = {540},
cid = {I:(DE-Juel1)PGI-5-20110106},
pnm = {42G - Peter Grünberg-Centre (PG-C) (POF2-42G41)},
pid = {G:(DE-HGF)POF2-42G41},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000328643900032},
doi = {10.1039/C3CP53427H},
url = {https://juser.fz-juelich.de/record/201763},
}