NDLI: Nanoparticle-coated chemiresistors with CMOS baseline tracking and cancellation

Content Provider	IEEE Xplore Digital Library
Author	Rairigh, D. Warnell, G. Mason, A.J. Xu, C. Rowe, M.P. Covington, E.L. Kurdak, C. Zellers, E.T.
Copyright Year	2008
Description	Author affiliation: Michigan State Univ., East Lansing, MI (Rairigh, D.; Warnell, G.; Mason, A.J.) \|\| Univ. of Michigan, Ann Arbor, MI (Xu, C.; Rowe, M.P.; Covington, E.L.; Kurdak, C.; Zellers, E.T.)
Abstract	Chemiresistors (CR) with thiolate-monolayer-protected gold nanoparticle (MPN) interfacial layers can provide sensitive detection of volatile organic compounds (VOCs). However, baseline resistances are high (~M-ohm) relative to the typical responses (~ohms), and baseline drifts can be large. These factors represent impediments to the implementation of CRs and CR arrays in microanalytical systems for multi-VOC monitoring. This paper presents a new baseline cancellation and tracking system for MPN-coated CRs. This system separates the sensor response and baseline in the analog domain. Concentrations down to hundreds of ppm were measured. The circuitry of the system demonstrated a sensor input range of over 45.8 dB. Most importantly, it accurately tracked and removed baseline drifts on the order of 2 mV/min and measured multiple sensors whose baselines differed by 27 MOmega.
Starting Page	196
Ending Page	199
File Size	636775
Page Count	4
File Format	PDF
ISBN	9781424425808
ISSN	19300395
DOI	10.1109/ICSENS.2008.4716416
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-10-26
Publisher Place	Italy
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Chromium Gold Immune system Chemical sensors Gas detectors Sensor systems Sensor phenomena and characterization Circuit testing Electrodes Sensor arrays
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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