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Trace chemical detection in air using electronic noses and nano-structured sensing materials



Kurt D. Benkstein, Christopher B. Montgomery, Stephen Semancik


For a variety of application areas, including homeland defense, environmental and health monitoring and emergency response, the detection of gas-phase chemicals is of great interest. One approach to these challenging sensing tasks is to use arrays of broadly selective chemical sensors as an electronic nose. In this presentation, we describe recent research at NIST, where we employ multi- element microscale chemiresistor arrays populated with varied (chemically and morphologically) sensing materials. Furthermore, we modulate the operating temperature of the microsensors on millisecond timescales to enable increased selectivity for the detection of several volatile organic compounds in air at varied concentrations less than 100 µmol/mol.
Proceedings Title
SPIE Proceedings
Conference Dates
May 5-9, 2014
Conference Location
Baltimore, MD
Conference Title


gas-phase sensors, e-nose, chemiresistor


Benkstein, K. , Montgomery, C. and Semancik, S. (2014), Trace chemical detection in air using electronic noses and nano-structured sensing materials, SPIE Proceedings, Baltimore, MD, [online], (Accessed June 22, 2024)


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Created June 11, 2014, Updated November 10, 2018