Polymer induced one-step interfacial self-assembly method for the fabrication of flexible, robust and free-standing SERS substrates for rapid on-site detection of pesticide residues

被引：50

作者：

Wu, Peng ^{[1
]}

Zhong, Lu-Bin ^{[1
,2
,3
]}

Liu, Qing ^{[1
,4
]}

Zhou, Xi ^{[5
]}

Zheng, Yu-Ming ^{[1
,2
,3
]}

机构：

[1] Chinese Acad Sci, Inst Urban Environm, CAS Key Lab Urban Pollutant Convers, 1799 Jimei Rd, Xiamen 361021, Fujian, Peoples R China

[2] Chinese Acad Sci, Inst Urban Environm, CAS Ctr Excellence Reg Atmospher Environm, Xiamen 361021, Fujian, Peoples R China

[3] Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China

[4] Putian Univ, Fujian Prov Key Lab Ecol Toxicol Effects & Contro, Putian 351100, Peoples R China

[5] Xiamen Univ, Coll Mat, Dept Biomat, Xiamen 361005, Fujian, Peoples R China

来源：

NANOSCALE | 2019年 / 11卷 / 27期

基金：

中国国家自然科学基金;

关键词：

RAMAN-SPECTROSCOPY; GOLD NANORODS; NANOPARTICLES; IDENTIFICATION; TRANSPARENT; MONOLAYER; FRUITS; ARRAY;

D O I：

10.1039/c9nr02851j

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We have demonstrated a one-step approach for the fabrication of flexible, robust, reproducible and freestanding SERS substrates (AuNPs/polyvinyl chloride (PVC) film) through a polymer induced interfacial self-assembly method. In this method, the polymer (PVC) plays dual roles, that is, inducing the interfacial self-assembly of nanoparticles and fixing the assembled nanostructure in the PVC matrix. As the assembled nanoparticles are orderly half-embedded in the PVC film, the AuNPs/PVC film exhibits outstanding reproducibility and stability. In addition, the film could be easily regenerated by rinsing with NaBH4 solution. As a proof of concept, the film was directly wrapped on an apple surface for in situ detection of pesticide residues, and a detection limit of 10 ng cm(-2) thiram was achieved. Furthermore, rapid on-site and in situ detection of multi-pesticide residues has been proved to be feasible with the aid of a portable Raman spectrometer. Due to its simple preparation, good reliability, outstanding stability and reusability, the AuNPs/PVC film has great potential in practical applications.

引用

页码：12829 / 12836

页数：8