JOURNAL OF SHANDONG UNIVERSITY(NATURAL SCIENCE) ›› 2025, Vol. 60 ›› Issue (9): 1-9.doi: 10.6040/j.issn.1671-9352.0.2025.013

   

Facet control and quantitative analysis of trisoctahedral gold nanoparticles

KONG Li, LI Longwei, HAO Mengjiao   

  1. Institute of Crystal Materials(State Key Laboratory of Crystal Materials), Shandong University, Jinan 250100, Shandong, China
  • Published:2025-09-10

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Abstract: Gold seeds were prepared using chloroauric acid as raw material, and the seed growth method was used to successfully prepare trisoctahedralgold nanoparticles(TOH-Au NPs)with high-index crystal faces.Firstly, trisoctahedral gold nanoparticles with high-index facets of {331}, {441}, and {431} were successfully fabricated through a seed-mediated growth method by precisely controlling the molar ratio of Au3+/ascorbic acid(AA)in the reaction system. The surface facets of the as-prepared nanoparticles were systematically characterized using transmission electron microscopy(TEM)combined with projection angle analysis and deconvolution of cyclic voltammetry(CV)curves, which confirmed the successful formation of high-index facets. Furthermore, the influence of cetyltrimethylammonium chloride(CTAC)concentration on the formation of TOH-Au NPs was investigated. The results demonstrated that the increase of AA content significantly promoted the formation of high-index crystal planes and the increasing the CTAC concentration improved the monodispersity of the nanoparticles. This study provided a robust strategy for the controllable synthesis of gold nanoparticles with specific high-index facets, laying a solid foundation for their potential applications in catalysis, sensing, and surface-enhanced Raman spectroscopy(SERS).

Key words: gold nanoparticle, seed growth method, high index facet, deconvolution analysis, cyclic voltammetry curve

CLC Number: 

  • O641
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