NDLI: Flexible membranes of Ag-nanosheet-grafted polyamide-nanofibers as effective 3D SERS substrates

Content Provider	Royal Society of Chemistry (RSC)
Author	Huang, Qing Huang, Zhulin Zhu, Chuhong Qian, Yiwu Sun, Kexi Meng, Guowen Chen, Bin
Copyright Year	2014
Abstract	We report on a synthetic approach to produce self-supported flexible surface-enhanced Raman scattering (SERS) active membranes consisting of polyamide (PA) nanofibers grafted with vertical Ag-nanosheets, via a combinatorial process of electrospinning PA-nanofiber membranes, assembling Au-nanoparticles on the PA-nanofibers as seeds for subsequent growth of Ag-nanosheets, and electrodepositing Ag-nanosheets on the electrospun PA-nanofibers. As a high density of Ag-nanosheets are vertically grown around each PA-nanofiber in the three-dimensional (3D) networked PA-nanofiber membranes, homogeneous nano-scaled gaps between the neighboring Ag-nanosheets are formed, leading to a high density of 3D SERS “hot spots” within the Ag-nanosheet-grafted PA-nanofiber membranes. The Ag-nanosheet-grafted PA-nanofiber membranes demonstrate high SERS activity with excellent Raman signal reproducibility for rhodamine 6G over the whole membrane. For a SERS-based trial analysis of polychlorinated biphenyls (PCBs, a kind of global environmental hazard), the 3D SERS substrate membranes are modified with mono-6-β-cychlodextrin to effectively capture PCB molecules. As a result, not only a low concentration down to 10−6 M is reached, but also two congeners of PCBs in their mixed solution are identified, showing promising potential in SERS-based rapid detection of trace organic pollutants such as PCBs in the environment.
Starting Page	4781
Ending Page	4788
Page Count	8
File Format	HTM / HTML PDF
ISSN	20403364
Volume Number	6
Issue Number	9
Journal	Nanoscale
DOI	10.1039/c3nr06483b
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Rhodamine Surface-enhanced Raman spectroscopy Polyamide Electrospinning Raman Combinatorics Polychlorinated biphenyl PCB Three-dimensional space
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology

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