Highly Sensitive Surface-Enhanced Raman spectroscopy for the Surface Corrosion Analysis of Bronze Relics Using the Polyacrylonitrile/Polyvinylpyrrolidone Silver Nanoparticle Flexible Substrate

Pengyang Li; Yahui Zhang; Xia Huang; Junying Chen; Jiachang Chen; Lei Li; Xiaoqi Xi

doi:10.1021/acsomega.2c06376

Highly Sensitive Surface-Enhanced Raman spectroscopy for the Surface Corrosion Analysis of Bronze Relics Using the Polyacrylonitrile/Polyvinylpyrrolidone Silver Nanoparticle Flexible Substrate

ACS Omega. 2023 Jan 10;8(3):3091-3101. doi: 10.1021/acsomega.2c06376. eCollection 2023 Jan 24.

Authors

Pengyang Li¹, Yahui Zhang², Xia Huang², Junying Chen¹, Jiachang Chen³, Lei Li⁴, Xiaoqi Xi⁴

Affiliations

¹ School of Chemical Engineering, Zhengzhou University, Zhengzhou, Henan450001, P.R. China.
² School of Materials Science and Engineering, Zhengzhou University, Zhengzhou, Henan450001, P.R. China.
³ Henan Provincial Institute of Cultural Relics and Archaeology, Zhengzhou, Henan450000, P.R. China.
⁴ PLA Strategic Support Force Information Engineering University Henan Key Laboratory of Imaging and Intelligent Processing, Zhengzhou, Henan450002, P.R. China.

Abstract

Surface-enhanced Raman spectroscopy (SERS) is widely used in biological and chemical analyses and in other fields because of its advantages such as high sensitivity and nondestructive nature. Ancient bronze cultural relics of China are exquisitely shaped and highly ornamental. Harmful rust components on the surface of bronze cultural relics have been extensively analyzed. SERS is beneficial to the surface composition analysis of ancient Chinese bronze relics and can be used for accurate characterization with almost zero damage to the surface. In this study, we designed a solution with polyacrylonitrile (PAN) and polyvinylpyrrolidone (PVP) macromolecules as precursors, which were electrospun and used as the nanofiber substrate. After tannic acid modification, the substrate was loaded with silver nanoparticles by using Tollens' reagent as the silver source and glutaraldehyde as the reducing agent in a water bath. The morphology and size of silver nanoparticles were adjusted by changing the reaction times. The effects of tannic acid and PVP as stabilizers were investigated. R6G and basic copper chloride were used as probe molecules for substrate SERS, and the Raman enhancement factor was calculated. The SERS performance of the substrate with high sensitivity was verified through characterization.