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@ARTICLE{Grasmik:858607,
author = {Grasmik, Viktoria and Breisch, Marina and Loza, Kateryna
and Heggen, Marc and Köller, Manfred and Sengstock,
Christina and Epple, Matthias},
title = {{S}ynthesis and biological characterization of alloyed
silver–platinum nanoparticles: from compact core–shell
nanoparticles to hollow nanoalloys},
journal = {RSC Advances},
volume = {8},
number = {67},
issn = {2046-2069},
address = {London},
publisher = {RSC Publishing},
reportid = {FZJ-2018-07467},
pages = {38582 - 38590},
year = {2018},
abstract = {Bimetallic nanoparticles consisting of silver and platinum
were prepared by a modified seeded-growth process in water
in the full composition range in steps of 10 $mol\%.$ The
particles had diameters between 15–25 nm as determined by
disc centrifugal sedimentation (DCS) and transmission
electron microscopy (TEM). Whereas particles with high
platinum content were mostly spherical with a solid silver
core/platinum shell structure, mostly hollow alloyed
nanoparticles were observed with increasing silver content.
The internal structure and the elemental distribution within
the particles were elucidated by high-resolution
transmission electron microscopy (HRTEM) in combination with
energy-dispersive X-ray spectroscopy (EDX). The particles
were cytotoxic for human mesenchymal stem cells (hMSC) above
50 $mol\%$ silver. This was explained by dissolution
experiments where silver was only released at and above 50
$mol\%$ silver. In contrast, platinum-rich particles (less
than 50 $mol\%$ silver) did not release any silver ions.
This indicates that the presence of platinum inhibits the
oxidative dissolution of silver.},
cin = {PGI-5},
ddc = {540},
cid = {I:(DE-Juel1)PGI-5-20110106},
pnm = {143 - Controlling Configuration-Based Phenomena (POF3-143)},
pid = {G:(DE-HGF)POF3-143},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000451075500051},
doi = {10.1039/C8RA06461J},
url = {https://juser.fz-juelich.de/record/858607},
}