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Chemical Science

A universal route with fine kinetic control to a family of penta-twinned gold nanocrystals†

Tao Zhang,a Xuejiao Li,ac Yiqiang Sun, b Dilong Liu,a Cuncheng Li, *b Weiping Cai a and Yue Li *a Author affiliations

* Corresponding authors

a Key Laboratory of Materials Physics, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China E-mail: yueli@issp.ac.cn

b School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, Shandong, P. R. China

c University of Science and Technology of China, Hefei, P. R. China

Abstract

Some of the major difficulties hindering the synthesis of different types of colloidal nanocrystals are their complex synthetic methods and the lack of a universal growth mechanism in one system. Herein, we propose a general strategy of kinetically controlled seed-mediated growth to synthesize a family of penta-twinned gold nanocrystals. Specifically, different kinds of penta-twinned nanocrystals (truncated penta-twinned decahedra, truncated bipyramids, bipyramids, truncated bipyramids with tips, star-like penta-twinned nanocrystals, decahedra with concave edges, and decahedra) with tunable sizes and high purity were readily achieved in one system solely by tailoring the deposition kinetics of adatoms on different sites of decahedral seeds. The controllable deposition kinetics can be realized by changing the ratio of reductant/gold precursors (R), which dictates whether horizontal or vertical features along the 5-fold axis direction of Au decahedral seeds are produced. Additionally, the selective growth of a second metal (silver) on penta-twinned gold seeds can be reached through minor modification of R, which opens a new avenue for mechanistic investigation by visualizing the seed localization within the final particles. The present work demonstrates a general paradigm for the kinetic growth of penta-twinned crystals and would be extended to the synthesis of other families of nanocrystals.

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Article information

DOI https://doi.org/10.1039/D1SC03040J Article type Edge Article Submitted 05 Jun 2021 Accepted 22 Aug 2021 First published 24 Aug 2021 This article is Open Access All publication charges for this article have been paid for by the Royal Society of Chemistry

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Chem. Sci., 2021,12, 12631-12639 BibTex EndNote MEDLINE ProCite ReferenceManager RefWorks RIS

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A universal route with fine kinetic control to a family of penta-twinned gold nanocrystals

T. Zhang, X. Li, Y. Sun, D. Liu, C. Li, W. Cai and Y. Li, Chem. Sci., 2021, 12, 12631 DOI: 10.1039/D1SC03040J

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Tao Zhang Xuejiao Li Yiqiang Sun Dilong Liu Cuncheng Li Weiping Cai Yue Li

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