Results 201 to 210 of about 7,178 (247)
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Colorimetric Sensor Array for Monitoring CO and Ethylene
Analytical Chemistry, 2018Developing miniaturized and inexpensive detectors remains an important and practical goal for field-deployable monitoring of toxic gases and other bioactive volatiles. CO (a common toxic pollutant) and ethylene (the phytohormone primarily responsible for fruit ripening) share the capability of strong back-π-bonding to low-oxidation-state metal ions ...
Zheng Li, Kenneth S. Suslick
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Detection of Chemical Warfare Agents by Colorimetric Sensor Arrays
ACS Sensors, 2020We report the successful use of colorimetric arrays to identify chemical warfare agents (CWAs). Methods were developed to interpret and analyze a 73-indicator array with an entirely automated workflow. Using a cross-validated first-nearest-neighbor algorithm for assessing detection and identification performances on 632 exposures, at 30 min ...
Charles E. Davidson +11 more
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Colorimetric Sensor Arrays for Volatile Organic Compounds
Analytical Chemistry, 2006The development of a low-cost, sensitive colorimetric sensor array for the detection and identification of volatile organic compounds (VOCs) is reported. Using an array composed of chemoresponsive dyes, enormous discriminatory power is possible in a simple device that can be imaged easily with an ordinary flatbed scanner.
Michael C, Janzen +4 more
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Multidimensional colorimetric sensor array for discrimination of proteins
Biosensors and Bioelectronics, 2016An extensible multidimensional colorimetric sensor array for the detection of protein is developed based on DNA functionalized gold nanoparticles (DNA-AuNPs) as receptors. In the presence of different proteins, the aggregation behavior of DNA-AuNPs was regulated by the high concentrations of salt and caused different color change; while DNA-AuNPs grew ...
Jinpeng, Mao +5 more
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The Optoelectronic Nose: Colorimetric and Fluorometric Sensor Arrays
Chemical Reviews, 2018A comprehensive review on the development and state of the art of colorimetric and fluorometric sensor arrays is presented. Chemical sensing aims to detect subtle changes in the chemical environment by transforming relevant chemical or physical properties of molecular or ionic species (i.e., analytes) into an analytically useful output.
Zheng Li +2 more
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Hand-Held Reader for Colorimetric Sensor Arrays
Analytical Chemistry, 2015An 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
Jon R, Askim, Kenneth S, Suslick
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Colorimetric sensor arrays for molecular recognition
Tetrahedron, 2004Abstract The development of colorimetric sensor arrays for the detection of volatile organic compounds is reported. Using an array of chemo-responsive dyes, enormous discriminatory power is created in a simple device that can imaged easily with an ordinary flat-bed scanner.
Kenneth S. Suslick +2 more
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Identification of Nanoparticles with a Colorimetric Sensor Array
ACS Sensors, 2015A simple colorimetric sensor array technique was developed for the detection of various different nanoparticles (NPs) in aqueous solutions. The sensor array consists of five different cross-reactive chemoresponsive dyes, whose visible absorbances change in response to their interactions with NPs.
Morteza Mahmoudi +3 more
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Colorimetric Sensor Arrays for the Analysis of Beers: A Feasibility Study
Journal of Agricultural and Food Chemistry, 2006Eighteen commercial beers have been analyzed in both liquid and gas phases using colorimetric sensor arrays made from selected chemically responsive dyes printed on a hydrophobic membrane. Digital imaging of the dye array before and after exposure to the complex analytes in either the liquid phase or the head-gas provides a color change profile as a ...
Chen, Zhang +2 more
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Counterion Free Colorimetric Metal Cation Sensor Array
Journal of Combinatorial Chemistry, 2007By a systematic ionic effect study in colorimetric dye arrays, we effectively suppressed the anion effect using the proper buffer condition and configured a universal cation sensor system. This result cast a warning for careful validation for other anion sensing systems in aqueous solution.
Lee, Jun-Seok +2 more
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