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Issue 4, 2012
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Silver nanosheet-coated inverse opal film as a highly active and uniform SERS substrate

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Abstract

The availability of well-controlled and reproducible substrates is critically important for surface-enhanced Raman spectroscopy (SERS)-based applications, but it remains a challenge at present. Herein, we report a facile strategy to prepare a new kind of SERS-active substrate, i.e., a two dimensional (2D) macroporous Ag film composed of a silver nanosheet (AgNS)-coated inverse opal film. The prepared substrate features good SERS reproducibility with a high enhancement factor (6 × 107), enabling the ultra-sensitive detection of 10 fM rhodamine 6G (R6G). Moreover, the resultant substrate can be applied in the label-free detection of DNA with a sensitivity limit as low as 5 nM. Consequently, as a high-performance SERS-active substrate, the 2D AgNS-coated inverse opal film is promising for a myriad of chemical and biochemical sensing applications.

Graphical abstract: Silver nanosheet-coated inverse opal film as a highly active and uniform SERS substrate

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Publication details

The article was received on 24 Aug 2011, accepted on 31 Oct 2011 and first published on 18 Nov 2011


Article type: Paper
DOI: 10.1039/C1JM14144A
Citation: J. Mater. Chem., 2012,22, 1370-1374
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    Silver nanosheet-coated inverse opal film as a highly active and uniform SERS substrate

    L. He, J. Huang, T. Xu, L. Chen, K. Zhang, S. Han, Y. He and S. T. Lee, J. Mater. Chem., 2012, 22, 1370
    DOI: 10.1039/C1JM14144A

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