title: Hand-Held Reader for Colorimetric Sensor Arrays.
abstract: An inexpensive hand-held device for analysis of colorimetric sensor arrays (CSAs) has been developed. The device makes use of a contact image sensor (CIS), technology commonly used in business card scanners, to rapidly collect low-noise colorimetric data for chemical sensing. The lack of moving parts and insensitivity to vibration allow for lower noise and improved scan rates compared to other digital imaging techniques (e.g., digital cameras, flatbed scanners); signal-to-noise ratios are a factor of 3-10 higher than currently used methods, and scan rates are up to 250 times faster without compromising sensitivity. The device is capable of real-time chemical analysis at scan rates up to 48 Hz.
authors.affiliation: Department of Chemistry, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801, United States.
authors.forename: Jon R
authors.initials: JR
authors.lastname: Askim
authors.affiliation: Department of Chemistry, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801, United States.
authors.forename: Kenneth S
authors.initials: KS
authors.lastname: Suslick
mesh_terms: D015374:Biosensing Techniques / Q000191:economics / Q000295:instrumentation*; D003124:Colorimetry / Q000295:instrumentation*; D001330:Electronic Data Processing; D059629:Signal-To-Noise Ratio