当前位置: 首页 > 学术作品
Flexible, transparent and highly sensitive SERS substrates with cross-nanoporous structures for fast on-site detection
时间:2021-12-20 16:47:02
分类:Nanoscale
作品信息

期刊

Nanoscale

标题

Flexible, transparent and highly sensitive SERS substrates with cross-nanoporous structures for fast on-site detection

作者

Yingcheng Wang, Yuanhao Jin, Xiaoyang Xiao, Tianfu Zhang, Haitao Yang, Yudan Zhao, Jiaping Wang, Kaili Jiang, Shoushan Fan and Qunqing Li

摘要

A flexible and transparent film assembled from the cross-nanoporous structures of Au on PET (CNS of Au@PET) is developed as a versatile and effective SERS substrate for rapid, on-site trace analysis with high sensitivity. The fabrication of the CNS of Au can be achieved on a large scale at low cost by employing an etching process with super-aligned carbon nanotubes as a mask, followed by metal deposition. A strongly enhanced Raman signal with good uniformity can be obtained, which is attributed to the excitation of “hot spots” around the metal nanogaps and sharp edges. Using the CNS of Au@PET film as a SERS platform, real-time and on-site SERS detection of the food contaminant crystal violet (CV) is achieved, with a detection limit of CV solution on a tomato skin of 10−7 M. Owing to its ability to efficiently extract trace analytes, the resulting substrate also achieves detection of 4-ATP contaminants and thiram pesticides by swabbing the skin of an apple. A SERS detection signal for 4-ATP has a relative standard deviation of less than 10%, revealing the excellent reproducibility of the substrate. The flexible, transparent and highly sensitive substrates fabricated using this simple and cost-effective strategy are promising for practical application in rapid, on-site SERS-based detection.

原文链接

https://pubs.rsc.org/en/content/articlelanding/2018/nr/c8nr01628c

在线咨询
ONLINE CONSULTING
电话咨询
PHONE CONSULTING

010-82449939