Jump to main content
Jump to site search

Issue 9, 2014
Previous Article Next Article

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

Author affiliations

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.

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

Back to tab navigation

Supplementary files

Publication details

The article was received on 06 Dec 2013, accepted on 06 Feb 2014 and first published on 17 Feb 2014


Article type: Paper
DOI: 10.1039/C3NR06483B
Nanoscale, 2014,6, 4781-4788

  •   Request permissions

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

    Y. Qian, G. Meng, Q. Huang, C. Zhu, Z. Huang, K. Sun and B. Chen, Nanoscale, 2014, 6, 4781
    DOI: 10.1039/C3NR06483B

Search articles by author

Spotlight

Advertisements