A flexible transparent Ag-NC@PE film as a cut-and-paste SERS substrate for rapid in situ detection of organic pollutants. Issue 20 (6th September 2016)

• Record Type: Journal Article
• Authors: Zhou, Ningning; Meng, Guowen; Huang, Zhulin; Ke, Yan; Zhou, Qitao; Hu, Xiaoye
• Is Part Of: Analyst. Volume 141:Issue 20(2016)
• Page Start: 5864
• Page End: 5869
• Publication Date: 2016-09-06
• Subjects: Chemistry, Analytic -- Periodicals; 543
• DOI: 10.1039/c6an00807k
• Languages: English
• ISSNs: 0003-2654

Abstract

Abstract : A flexible transparent Ag-NC@PE film substrate is pasted onto contaminated fruits for rapid in situ SERS detection of organic pollutants. Abstract : This report presents a simple and inexpensive fabrication approach to a flexible transparent composite film as a "cut-and-paste" surface-enhanced Raman scattering (SERS) substrate for in situ detection of organic pollutants. First, a self-assembled monolayer of Ag-nanocubes (Ag-NCs) is obtained at the air/water interface. Then, the Ag-NC monolayer is retrieved onto a flexible transparent polyethylene (PE) film to achieve an Ag-NC@PE composite film as a flexible SERS substrate. As the Ag-NCs in the monolayer are closely and uniformly packed on the PE film, the Ag-NC@PE composite film shows high SERS-activity with good signal homogeneity and reproducibility. Furthermore, the flexible transparent Ag-NC@PE composite film is "cut into" small pieces and directly "pasted" onto contaminated fruits for in situ SERS detection, as a result 10 nM thiram, 1 μM 4-polychlorinated biphenyl and 10 nM methyl parathion contaminants on oranges are detected, respectively. Therefore the Ag-NC@PE composite film is an inexpensive and effective SERS substrate for rapid in situ detection of organic pollutants in aqueous solutions, on fruits and other solid objects.