Share Email Print
cover

Proceedings Paper

Free surface microfluidic/SERS for detection of gas-phase DNT
Author(s): Brian D. Piorek; Seung Joon Lee; Nick Judy; Carl D. Meinhart; Martin Moskovits; Augustus Fountain; Steven Christesen; Jason Guicheteau
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

A novel microfluidic/SERS platform has been developed for real time sensing of 2,4-DNT. The fundamental research is being conducted at UCSB, commercialized by SpectraFluidics, and validated at ECBC. The system leverages phenomena at multiple length scales, ranging from tens of micrometers to several nanometers. The key enabling technology is a newly developed invention termed Free-Surface Fluidics (FSF), where one or more fluidic surfaces are confined by surface tension forces, and exposed to the surrounding atmosphere. The free-surface fluidic architecture is combined with surface-enhanced Raman spectroscopy (SERS) for detection of 2,4-DNT. Once 2,4-DNT analyte molecules are absorbed into the flow, they can interact with gold or silver colloidal particles. This architecture allows for analysis and deterministic control of SERS 'hot spot' aggregation, which can increase Raman scattering signal strength by up to 10 orders in magnitude. We have successfully measured DNT vapor at concentrations as low as ~1 ppb. This sensitivity value is confirmed by orthogonal measurements using GC-mass spectroscopy at ECBC.

Paper Details

Date Published: 5 May 2010
PDF: 7 pages
Proc. SPIE 7665, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XI, 76650L (5 May 2010); doi: 10.1117/12.849521
Show Author Affiliations
Brian D. Piorek, SpectraFluidics, Inc. (United States)
Seung Joon Lee, SpectraFluidics, Inc. (United States)
Nick Judy, Univ. of California, Santa Barbara (United States)
Carl D. Meinhart, Univ. of California, Santa Barbara (United States)
Martin Moskovits, Univ. of California, Santa Barbara (United States)
Augustus Fountain, U.S. Army Edgewood Chemical Biological Ctr. (United States)
Steven Christesen, U.S. Army Edgewood Chemical Biological Ctr. (United States)
Jason Guicheteau, U.S. Army Edgewood Chemical Biological Ctr. (United States)


Published in SPIE Proceedings Vol. 7665:
Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XI
Augustus Way Fountain III; Patrick J. Gardner, Editor(s)

© SPIE. Terms of Use
Back to Top