Atomic structure of a seed-sized gold nanoprism

Yongbo Song (), Yingwei Li, Meng Zhou, Hao Li, Tingting Xu, Chuanjun Zhou, Feng Ke, Dayujia Huo, Yan Wan, Jialong Jie, Wen Wu Xu, Manzhou Zhu () and Rongchao Jin ()
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Yongbo Song: Anhui University
Yingwei Li: Carnegie Mellon University
Meng Zhou: University of Science and Technology of China
Hao Li: Anhui University
Tingting Xu: Anhui Medical University
Chuanjun Zhou: Anhui University
Feng Ke: Anhui University
Dayujia Huo: Beijing Normal University
Yan Wan: Beijing Normal University
Jialong Jie: Beijing Normal University
Wen Wu Xu: Ningbo University
Manzhou Zhu: Anhui University
Rongchao Jin: Carnegie Mellon University

Nature Communications, 2022, vol. 13, issue 1, 1-7

Abstract: Abstract The growth of nanoparticles along one or two directions leads to anisotropic nanoparticles, but the nucleation (i.e., the formation of small seeds of specific shape) has long been elusive. Here, we show the total structure of a seed-sized Au56 nanoprism, in which the side Au{100} facets are surrounded by bridging thiolates, whereas the top/bottom {111} facets are capped by phosphine ligands at the corners and Br− at the center. The bromide has been proved to be the key to effectively stabilize the Au{111} to fulfill a complete face-centered-cubic core. In femtosecond electron dynamics analysis, the non-evolution of transient absorption spectra of Au56 is similar to that of larger-sized gold nanoclusters (n > 100), which is ascribed to the completeness of the prismatic Au56 core and an effective electron relaxation pathway created by the stronger Au-Au bonds inside. This work provides some insights for the understanding of plasmonic nanoprism formation.

Date: 2022
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DOI: 10.1038/s41467-022-28829-0

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