Issue 7, 2020

Beam generation and structural optimization of size-selected Au923 clusters

Abstract

A size-selected beam of Au923±20 clusters is generated in a gas-phase condensation cluster source equipped with a lateral time-of-flight mass selector. The beam current reaches up to 9.13 nA for small clusters and 80 pA for Au923±20 clusters, which are then analyzed using a scanning transmission electron microscope. Four types of metastable structures are observed for the Au923±20 clusters, including ino-decahedron (Dh), cuboctahedron and icosahedron (Ih). The proportion of bulk-favorable cuboctahedron (i.e. face center cubic (Fcc)) structure takes up only 10–20%, while the penta-rotating symmetrical structures (Dh/Ih) are the dominant ones which take up over three quarters. Changing the beam condition may optimize the clusters from Dh-dominant to the Ih-dominant phase, which paves the way towards nanoparticle control beyond the diameters.

Graphical abstract: Beam generation and structural optimization of size-selected Au923 clusters

Article information

Article type
Communication
Submitted
17 apr 2020
Accepted
18 may 2020
First published
18 may 2020
This article is Open Access
Creative Commons BY-NC license

Nanoscale Adv., 2020,2, 2720-2725

Beam generation and structural optimization of size-selected Au923 clusters

S. Lu, K. Hu, Z. Zuo, S. Hu, G. Wang, F. Song and L. Cao, Nanoscale Adv., 2020, 2, 2720 DOI: 10.1039/D0NA00304B

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