Ag-Au nanoclusters: Structure and phase segregation
Research output: Contribution to journal › Article
Authors
Colleges, School and Institutes
Abstract
We present a systematic survey of unprotected Ag-Au nanoclusters prepared by inert gas aggregation. The clusters are initially fully and homogeneously alloyed, exhibiting icosahedral and decahedral structural motifs. Imaging using scanning transmission electron microscopy indicates that over a period of up to 2 yr, the nanoclusters undergo structural transitions into phase-segregated core-shell and Janus particles with Ag-Au cores and AgxO shells. Larger Janus particles undergo a ripening process which results in division into separate Ag-Au-rich and Ag2O-rich particles. We propose that oxidation of the Ag component and subsequent diffusion of AgxO are responsible for the observed phenomena. (C) 2011 American Institute of Physics. [doi:10.1063/1.3656244]
Details
Original language | English |
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Article number | 171914 |
Pages (from-to) | 171914 |
Number of pages | 1 |
Journal | Applied Physics Letters |
Volume | 99 |
Issue number | 17 |
Publication status | Published - 1 Oct 2011 |