A xylan assisted surface-enhanced Raman scattering substrate for rapid food safety detection

Zhouyang Xiang; Mengyun He; Li Li; Jamshed Bobokalonov; Abduvali Dzhonmurodov; Xingxiang Ji

doi:10.3389/fbioe.2022.1031152

A xylan assisted surface-enhanced Raman scattering substrate for rapid food safety detection

Front Bioeng Biotechnol. 2022 Sep 30:10:1031152. doi: 10.3389/fbioe.2022.1031152. eCollection 2022.

Authors

Zhouyang Xiang^{1

2}, Mengyun He², Li Li², Jamshed Bobokalonov³, Abduvali Dzhonmurodov³, Xingxiang Ji¹

Affiliations

¹ State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China.
² State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, China.
³ V.I. Nikitin Institute of Chemistry, National Academy of Sciences of Tajikistan, Dushanbe, Tajikistan.

Abstract

Cellulose fiber/paper-based surface-enhanced Raman scattering (SERS) is considered as a promising food safety detection technology due to its non-toxicity, low cost, flexibility, and hygroscopicity for possible rapid on-site agricultural product contaminant detection. However, it faces the problems of poor noble metal adhesion and toxic noble metal reducing agent. In this study, a natural macromolecule-xylan was used as both a reducing agent and a stabilizing agent to prepare stable Au-Ag bimetal nanoparticles, which were anchored on the paper surface by xylans in order to fabricate a paper-based Au-Ag bimetallic SERS substrate. The results show that the SERS substrate has a high Raman enhancement performance and reproductively. The substrate can effectively detect trace pesticide, i.e., thiram, and the limit of detection is as low as 1 × 10^-6 mol/L (0.24 ppm). In addition, the paper-based SERS substrate can be used for direct detection of pesticide residues on the surface of fruit. The paper-based SERS substrate developed in this study has great potential in applications for rapid food safety detection.

Keywords: bimetal nanoparticle; food safety detection; paper base; surface-enhanced Raman scattering; xylan.