NDLI: Inkjet-printed paper-based SERS dipsticks and swabs for trace chemical detection.

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Inkjet-printed paper-based SERS dipsticks and swabs for trace chemical detection.

Content Provider	Semantic Scholar
Author	Yu, Wei Wen White, Ian M.
Copyright Year	2013
Abstract	We demonstrate a paper-based surface swab and lateral-flow dipstick that includes an inkjet-printed surface-enhanced Raman spectroscopy (SERS) substrate for analyte detection. Due to capillary-action wicking of cellulose, the paper dipstick enables extremely simple and pump-free loading of liquid samples into the detection device, and in addition provides inherent analyte concentration within the detection volume. Furthermore, the flexible nature of the paper-based SERS device also enables it to act as a swab to collect analyte molecules directly from a large-area surface; the collected analyte molecules can then be focused into a small-volume SERS-active region by lateral-flow concentration. These capabilities are unseen in today's SERS substrates and microfluidic SERS devices. Using these novel lateral-flow paper SERS devices, we achieved detection limits as low as 95 fg of Rhodamine 6G (R6G), 413 pg of the organophosphate malathion, 9 ng of heroin, and 15 ng of cocaine. Moreover, the measurements show that the technique is quantitative and is repeatable across multiple swabs and dipsticks. The results reported here may lead to ultra-low-cost portable applications in trace chemical detection.
Starting Page	2360
Ending Page	2366
Page Count	7
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://www.rsc.org/suppdata/an/c2/c2an36116g/c2an36116g.pdf
PubMed reference number	23001259v1
Alternate Webpage(s)	https://doi.org/10.1039/c2an36116g
DOI	10.1039/c2an36116g
Journal	The Analyst
Volume Number	138
Issue Number	4
Language	English
Access Restriction	Open
Subject Keyword	Capillary Action Cellulose Cocaine Dipstick device Malathion Microfluidics Organophosphates Spectroscopy, Near-Infrared Swab specimen analyte
Content Type	Text
Resource Type	Article

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