Synthesis of uniform hexagonal Ag nanoprisms with controlled thickness and tunable surface plasmon bands

Xing Chen; Xun Liu; Kai Huang

doi:10.1007/s12613-019-1785-x

Volume 26 Issue 6

Jun. 2019

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2019 > 26(6): 796-802

Xing Chen, Xun Liu, and Kai Huang, Synthesis of uniform hexagonal Ag nanoprisms with controlled thickness and tunable surface plasmon bands, Int. J. Miner. Metall. Mater., 26(2019), No. 6, pp. 796-802. https://doi.org/10.1007/s12613-019-1785-x

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Xing Chen, Xun Liu, and Kai Huang, Synthesis of uniform hexagonal Ag nanoprisms with controlled thickness and tunable surface plasmon bands, Int. J. Miner. Metall. Mater., 26(2019), No. 6, pp. 796-802. https://doi.org/10.1007/s12613-019-1785-x

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Research Article

Synthesis of uniform hexagonal Ag nanoprisms with controlled thickness and tunable surface plasmon bands

+ Author Affiliations

Corresponding author:
Kai Huang E-mail: khuang@metall.ustb.edu.cn
Received: 24 May 2018; Revised: 5 November 2018; Accepted: 13 November 2018

Abstract

Abstract

In this work, we synthesized monodispersed hexagonal Ag nanoprisms in high yields in a system of poly(vinylpyrrolidone) (PVP) in N-methylpyrrolidone (NMP). A blue shift occurred and was strongly dependent on the thickness of the uniform Ag nanoprisms, which had almost the same radial area. When the Ag nanoprisms grew thicker, their in-plane dipole resonance peaks markedly shifted toward shorter wavelengths (i.e., blue shift). PVP played a critical role of favoring vertical growth of the Ag nanoplates, preventing aggregation, and inducing the formation of Ag hexagonal nanoprisms (HNPs) through the transformation from thin Ag triangular nanoprisms (TNPs). Compared with similar previous research, the present study provides quite uniform Ag hexagonal nanoplates, which makes the blue shift related more solely and distinctly to the thickness of the Ag nanoprisms. The findings of this work provide a new perspective toward understanding the unique optical characteristics of Ag HNPs with different aspect ratios.
- hexagonal nanoprisms;
- silver nanoprisms;
- blue shift;
- thickness effect

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