Cauliflower-Inspired 3D SERS Substrate for Multiple Mycotoxins Detection.

Analytical Chemistry
Jinjie LiHeyou Han

Abstract

Surface-enhanced Raman spectroscopy (SERS) is a promising analytical tool, but simultaneous detection of multiple targets using SERS remains a challenge. Herein, a cauliflower-inspired 3D SERS substrate with intense hot spots was prepared through sputtering Au nanoparticles (Au NPs) on the surface of polydimethylsiloxane coated anodic aluminum oxide (PDMS@AAO) complex substrate. As a result, the cauliflower-inspired 3D SERS substrate achieved the highest SERS activities at a sputtering time of 8 min. Under the optimal conditions, this SERS substrate possessed a low detection limit of 10-12 M, excellent enhancement uniformity (relative standard deviation, RSD = 4.57%) and high enhancement factor (2.2 × 106) for 4-mercaptobenzoic acid (4-MBA). Furthermore, the results of Raman showed that the 3D-Nanocauliflower SERS substrates could realize the simultaneous label-free detection for three mycotoxins (aflatoxin B1, deoxynivalenol, and zearalenone) in maize for the first time. It behaved good linear relationship between the concentrations and Raman intensities of aflatoxin B1, zearalenone, and deoxynivalenol. For the three mycotoxins, this method exhibited the limit of detection (LOD) of 1.8, 47.7, and 24.8 ng/mL (S/N = 3), respecti...Continue Reading

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Citations

Jan 8, 2021·Comprehensive Reviews in Food Science and Food Safety·Wenlei ZhaiMeng Wang
Jan 12, 2021·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Xiaoya PengWei Deng
Feb 4, 2021·The Analyst·Linxia WuDizhe Wei
Aug 1, 2021·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·Kaiqiang Wang, Jinjie Li
Jul 21, 2021·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·Xiaoran TianXianming Kong
Nov 5, 2019·ACS Applied Materials & Interfaces·Fengrui XuDavid L Kaplan
Nov 6, 2020·Analytical Chemistry·Rebeca S RodriguezChristy L Haynes
Mar 10, 2020·Analytical Chemistry·Jinjie LiHeyou Han
Jul 19, 2019·ACS Applied Materials & Interfaces·Kaiqiang WangLunjie Huang
Jan 15, 2022·NPJ Science of Food·Natasha LoganChristopher T Elliott

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