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Beam generation and structural optimization of size-selected Au923 clusters

Abstract

Size selected beam of Au923±20 clusters are 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 the Au923±20 clusters, which are then analyzed by 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) etc. The bulk-favorable cuboctahedron (i.e. face center cubic, Fcc) structure is found with only 10-20 percent, while the penta-rotating symmetrical structures (Dh / Ih) are dominant over three quarters. Changing the beam condition may optimize the clusters from Dh-dominant to Ih-dominant phase. This paves the way towards nanoparticles control beyond the diameters.

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Article information


Submitted
17 Apr 2020
Accepted
18 May 2020
First published
18 May 2020

This article is Open Access

Nanoscale Adv., 2020, Accepted Manuscript
Article type
Communication

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, Accepted Manuscript , DOI: 10.1039/D0NA00304B

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