A Uniform, Reproducible and Tunable SERS Substrate for Chemical and Biological Sensing

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Authors
  1. Wang, S.
  2. Tay, L.
  3. Liu, H.
Corporate Authors
Defence R&D Canada - Suffield, Ralston ALTA (CAN)
Abstract
This report provides a novel approach to self-assemble negatively charged individual pristine silver nanoparticles generated in the gas phase (with diameter less than 10 nm) on to a solid support (glass, plastic, rubber, silicon wafer, ITO, etc.) for the fabrication of a low-cost SERS-active substrate. The SERS substrate has been demonstrated to be tunable to accommodate different excitation lasers to achieve the maximum SERS response simply by controlling the deposition time. The SERS response has been shown to be highly reproducible / uniform from point-to-point across the entire substrate as well as from batch-to-batch which is desirable for quantifiable detection of chemical and biological molecules. In addition, the DRDC SERS substrate works well for chemical and biochemical sensing in both liquid and vapour forms. This new technology provides an affordable and reliable sensing and identification capability against new and emerging chemical and biological threats in support of the CF.

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Keywords
SERS;hand held raman;detection and identification;TICs;WMD
Report Number
DRDC-SUFFIELD-TM-2012-164 — Technical Memorandum
Date of publication
01 Nov 2013
Number of Pages
46
DSTKIM No
CA046057
CANDIS No
806533
Format(s):
Electronic Document(PDF)

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