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Research Article

Study of thermoelectric enhanced SERS and photocatalysis with ZnO-metal nanorod arrays

Baoqiang Du1, Jibing Tan1, Chang Ji1, Mingrui Shao1, Xiaofei Zhao1, Jing Yu1, Chao Zhang1, Chuansong Chen1, Hui Pan2( ), Baoyuan Man1( ), Zhen Li1( )
School of Physics and Electronics, Collaborative Innovation Center of Light Manipulations and Applications, Shandong Normal University, Jinan 250014, China
Institute of Applied Physics and Materials Engineering, University of Macau, Macao 999078, China
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Graphical Abstract

Thermoelectrically induced surface-enhanced Raman scattering (E-SERS) substrates were fabricated. Enhanced SERS signal and precise control of the redox reaction were achieved by applying a controlled temperature gradient to the substrates.

Abstract

Herein, a thermoelectric induced surface-enhanced Raman scattering (SERS) substrate consisting of ZnO nanorod arrays and metal nanoparticles is proposed. The intensities of SERS signals are further enhanced by an order of magnitude and the limit of detection (LOD) for the molecules is reduced by at least one order of magnitude after the application of a thermoelectric potential. The enhancement mechanism is analyzed carefully and thoroughly based on the experimental and theoretical results, thus proving that the thermoelectric-induced enhancement of the SERS signals should be classified as a chemical contribution. Furthermore, it is proved that the electric regulation mechanism is universally applicable, and the fabricated substrate realizes enormous enhancements for various types of molecules, such as rhodamine 6G, methyl orange, crystal violet, amaranth, and biological molecules. Additionally, the proposed electric-induced SERS (E-SERS) substrate is also realized to monitor and manipulate the plasmon-activated redox reactions. We believe that this study can promote the course of the research on E-SERS and plasmon-enhanced photocatalysts.

Keywords

ZnOelectric-induced surface-enhanced Raman scattering (E-SERS)temperature gradientphotocatalysislocal surface plasmon resonance (LSPR)

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Nano Research
Volume 16 Issue 4,
April 2023
Pages 5427-5435
DOI: 10.1007/s12274-022-5253-y
Cite this article:
Du B, Tan J, Ji C, et al. Study of thermoelectric enhanced SERS and photocatalysis with ZnO-metal nanorod arrays. Nano Research, 2023, 16(4): 5427-5435. https://doi.org/10.1007/s12274-022-5253-y
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Received: 25 August 2022
Revised: 15 October 2022
Accepted: 27 October 2022
Published: 12 November 2022
© Tsinghua University Press 2022
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