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Quantification of surface composition and segregation on AuAg bimetallic nanoparticles by MALDI MS
Suiyang Liao1, Zhi Luo, Jonas Bastian Metternich
1Institute of Materials, École Polytechnique Fédérale de Lausanne, Station 12, 1015 Lausanne, Switzerland. francesco.stellacci@epfl.ch.
Nanoscale
|November 5, 2020
Abstract:
In this work we show that it is possible to use MALDI-TOF as a tool to quantify the atomic composition and to describe the phase segragation of the surface of ligand-coated, bimetallic AuAg nanoparticles. Our investigation shows that AuAg nanoparticles of various compositions exhibit core-shell heterogeneity with surface enrichment of Ag. A Monte-Carlo type simulation demonstrates that the surface Au and Ag atoms arrange in a random fashion.