Seeing smells: development of an optoelectronic nose

Química Nova

Kenneth S. Suslick¹  Daniel P. Bailey¹  Crystal K. Ingison¹  Michael Janzen¹  Margaret E. Kosal¹  William B. Mcnamara Iii¹  Neal A. Rakow¹  Avijit Sen¹  Jeremy J. Weaver¹  Jennifer B. Wilson¹  Chen Zhang¹  Shirley Nakagaki¹ 

[1] ,University of Illinois at Urbana-Champaign Department of Chemistry Urbana,USA

关键词: electronic nose;    metalloporphyrins;    sensor technology;   

DOI  :  10.1590/S0100-40422007000300029

来源: SciELO

【 摘 要 】

The development of an array of chemically-responsive dyes on a porous membrane and in its use as a general sensor for odors and volatile organic compounds (VOCs) is reviewed. These colorimetric sensor arrays (CSA) act as an "optoelectronic nose" by using an array of multiple dyes whose color changes are based on the full range of intermolecular interactions. The CSA is digitally imaged before and after exposure and the resulting difference map provides a digital fingerprint for any VOC or mixture of odorants. The result is an enormous increase in discriminatory power among odorants compared to prior electronic nose technologies. For the detection of biologically important analytes, including amines, carboxylic acids, and thiols, high sensitivities (ppbv) have been demonstrated. The array is essentially non-responsive to changes in humidity due to the hydrophobicity of the dyes and membrane.

【 授权许可】

CC BY-NC   
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