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

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 dimensiona...

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Bibliographic Details
Published in:Journal of materials chemistry 2012-01, Vol.22 (4), p.1370-1374
Main Authors: He, Lifang, Huang, Jianan, Xu, Tingting, Chen, Limiao, Zhang, Kui, Han, Suting, He, Yao, Lee, Shuit Tong
Format: Article
Language:English
Subjects:
Biochemistry
Inverse
Nanocomposites
Nanomaterials
Nanostructure
Silver
Strategy
Two dimensional
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Summary: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 10 super(7)), 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.
ISSN:0959-9428
1364-5501
DOI:10.1039/C1JM14144A