基于Au修饰的花状V<sub>2</sub>O<sub>5</sub>的表面增强拉曼散射研究

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Abstract The flower-like V₂O₅ materials were synthesized via one-step hydrothermal method. After that, gold films were deposited on the surface of the flower-like V₂O₅ materials by ion beam sputtering and then annealed at 400 ℃ to obtain the flower-like V₂O₅@Au materials. The samples were characterized by XRD, XPS and TEM, and surface-enhanced Raman effect (SERS) spectra were performed. It is found that the flower-like V₂O₅@Au materials are used as SERS substrates with good Raman activity, and their detected lowest concentration of rhodamine 6G (R6G) is 1.0×10^-8 mol·L^-1 and their enhancement factor is about 10⁵. SERS spectra of the examined 30 points for R6G at the concentration of 10^-6 mol·L^-1 revealed that the relative standard deviation (RSD) of the characteristic peak intensity is less than 20%. The flower-like V₂O₅@Au materials have high sensitivity and good detection reproducibility for R6G detection. In addition, the flower-like V₂O₅@Au materials exhibit high sensitivity to the carcinogens malachite green (MG) and rhodamine B (RhB), and their limits of detection are 4.36×10^-9 mol·L^-1 and 3.11×10^-8 mol·L^-1 respectively. This substrate has a potential application for food safety and environmental monitoring.

Key words： flower-like V₂O₅@Au composite SERS carcinogen

Published: 01 July 2020

CLC number:

TB333

Fund:This work was financially supported by the Natural Science Foundation of China (11764046).

About author:: Song Yang, Yunnan Normal University, Master's degree, mainly engaged in the preparation of semiconductor nanomaterials and its surface enhanced Raman scattering characteristics ; Yingkai Liu, Yunnan Normal University, doctoral supervisor, September 1999—December 2002, Ph.D. in physics, Nanjing University, majoring in cluster phy-sics and nanotechnology, Ph.D. in January 2003. From July 2003 to August 2005, he was a postdoctoral researcher at City University of Hong Kong, China. In 2018, he was invited to visit Rice University for one year. He is mainly engaged in the preparation of one-dimensional nanomaterials and nanofilms and their spectral and optoelectronic properties and application. Hosted and participated in many national natural science foundations and provincial natural science foundations, and published more than 40 papers in academic journals at home and abroad, of which 18 (first authors) were included by SCI, and more than half of the journals' impact factors are among the forefront of disciplines. For example, two papers have been published on Advanced Materials and Applied Physics Letters, with one cover article. It has been cited more than 100 times by others' SCI retrieval papers, and a single article has been cited by other people's SCI retrieval papers 44 times. It has trained dozens of postgraduates and more than 100 undergraduates.

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	YANG Song
	SHENG Shuanghua
	LIU Yingkai

Cite this article:

YANG Song,SHENG Shuanghua,LIU Yingkai. Study on Surface Enhanced Raman Scattering of Flower-like V₂O₅ MaterialsModified by Au Nanoparticles[J]. Materials Reports, 2020, 34(Z1): 34-38.

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http://www.mater-rep.com/EN/ OR http://www.mater-rep.com/EN/Y2020/V34/IZ1/34

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