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Synthesis of multi-branched gold nanostructures and their surface-enhanced Raman scattering properties of 4-aminothiophenol

Published online by Cambridge University Press:  07 February 2019

Min He ,
Beibei Cao ,
Xiangxiang Gao ,
Bin Liu  and
Jianhui Yang
Min He
Affiliation:
Key Laboratory of Synthetic and Natural Functional Molecule Chemistry (Ministry of Education), Shaanxi Key Laboratory of Physico-Inorganic Chemistry, College of Chemistry and Materials Science, Northwest University, Xi’an 710127, People’s Republic of China
Beibei Cao
Affiliation:
Key Laboratory of Synthetic and Natural Functional Molecule Chemistry (Ministry of Education), Shaanxi Key Laboratory of Physico-Inorganic Chemistry, College of Chemistry and Materials Science, Northwest University, Xi’an 710127, People’s Republic of China
Xiangxiang Gao
Affiliation:
Key Laboratory of Synthetic and Natural Functional Molecule Chemistry (Ministry of Education), Shaanxi Key Laboratory of Physico-Inorganic Chemistry, College of Chemistry and Materials Science, Northwest University, Xi’an 710127, People’s Republic of China
Bin Liu
Affiliation:
Key Laboratory of Synthetic and Natural Functional Molecule Chemistry (Ministry of Education), Shaanxi Key Laboratory of Physico-Inorganic Chemistry, College of Chemistry and Materials Science, Northwest University, Xi’an 710127, People’s Republic of China
Jianhui Yang*
Affiliation:
Key Laboratory of Synthetic and Natural Functional Molecule Chemistry (Ministry of Education), Shaanxi Key Laboratory of Physico-Inorganic Chemistry, College of Chemistry and Materials Science, Northwest University, Xi’an 710127, People’s Republic of China
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

A facile one-pot and environmentally friendly method was developed to synthesize multi-branched flowerlike gold (Au) nanostructures by reducing chlorate gold (HAuCl4) with hydrogen peroxide (H2O2) in the presence of sodium citrate. The multibranched Au nanostructures were characterized by transmission electron microscopy and Ultraviolet-visible (UV-vis) absorption spectroscopy. The molar ratio of sodium citrate to HAuCl4 and the concentrations of the reacted reagents play important roles in the formation of multibranched Au nanostructures. The multibranched Au nanostructures with sharp tips exhibit excellent surface-enhanced Raman scattering (SERS) ability of 4-aminothiophenol (PATP). The experimental and simulated results both confirm that the photoinduced catalytic coupling reaction of PATP transformation to 4,4′-dimercaptoazobenzene occurs on the surface of multibranched Au nanostructures at a high power during the SERS measurement. It is believed that these multibranched Au nanostructures may find potential applications in SERS, biosensors, and the photoinduced surface catalytic application fields.

Keywords

AunanostructureRaman spectroscopy
Type
Article
Information
Journal of Materials Research , Volume 34 , Issue 17: Focus Issue: Building Advanced Materials via Particle Aggregation and Molecular Self-Assembly , 16 September 2019 , pp. 2928 - 2934
Copyright
Copyright © Materials Research Society 2019 

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