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000858607 1001_ $$0P:(DE-HGF)0$$aGrasmik, Viktoria$$b0
000858607 245__ $$aSynthesis and biological characterization of alloyed silver–platinum nanoparticles: from compact core–shell nanoparticles to hollow nanoalloys
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000858607 520__ $$aBimetallic nanoparticles consisting of silver and platinum were prepared by a modified seeded-growth process in water in the full composition range in steps of 10 mol%. The particles had diameters between 15–25 nm as determined by disc centrifugal sedimentation (DCS) and transmission electron microscopy (TEM). Whereas particles with high platinum content were mostly spherical with a solid silver core/platinum shell structure, mostly hollow alloyed nanoparticles were observed with increasing silver content. The internal structure and the elemental distribution within the particles were elucidated by high-resolution transmission electron microscopy (HRTEM) in combination with energy-dispersive X-ray spectroscopy (EDX). The particles were cytotoxic for human mesenchymal stem cells (hMSC) above 50 mol% silver. This was explained by dissolution experiments where silver was only released at and above 50 mol% silver. In contrast, platinum-rich particles (less than 50 mol% silver) did not release any silver ions. This indicates that the presence of platinum inhibits the oxidative dissolution of silver.
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000858607 7001_ $$0P:(DE-HGF)0$$aBreisch, Marina$$b1
000858607 7001_ $$0P:(DE-HGF)0$$aLoza, Kateryna$$b2
000858607 7001_ $$0P:(DE-Juel1)130695$$aHeggen, Marc$$b3
000858607 7001_ $$0P:(DE-HGF)0$$aKöller, Manfred$$b4
000858607 7001_ $$0P:(DE-HGF)0$$aSengstock, Christina$$b5
000858607 7001_ $$00000-0002-1641-7068$$aEpple, Matthias$$b6$$eCorresponding author
000858607 773__ $$0PERI:(DE-600)2623224-8$$a10.1039/C8RA06461J$$gVol. 8, no. 67, p. 38582 - 38590$$n67$$p38582 - 38590$$tRSC Advances$$v8$$x2046-2069$$y2018
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