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Issue 21, 2019
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Altering the stability of nanoislands through core–shell supports

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Abstract

We follow the decay of two-dimensional Ag nanoclusters, called islands, on Cu–Ag core–shell supports by variable low temperature scanning tunneling microscopy in the temperature range between 160 and 260 K. We reveal two qualitatively different types of decay mechanisms, either linear in time, indicative of an interface-limited decay, or non-linear in time, indicative of diffusion-limited decay. In contrast to conventional decay on monometallic supports, the decay exponent of the diffusion-limited decay depends on temperature; it varies by one order of magnitude. Moreover, the decay rate decreases with increasing temperature. This unusual behaviour is traced back to the temperature-dependent shell of the core–shell support.

Graphical abstract: Altering the stability of nanoislands through core–shell supports

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Submitted
17 Jan 2019
Accepted
14 May 2019
First published
14 May 2019

Nanoscale, 2019,11, 10314-10319
Article type
Paper

Altering the stability of nanoislands through core–shell supports

C. Sprodowski and K. Morgenstern, Nanoscale, 2019, 11, 10314
DOI: 10.1039/C9NR00529C

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