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3. Thermal and Optical Activation Mechanisms of Nanospring-Based Chemiresistors

Author

Tej Prakash, Joseph Williams, David McIlroy, Leah Bergman, Jesse Huso, Pavel Bakharev, Timothy Cantrell, Giancarlo Corti, Dewayne Sowell, Alexander Larin, Jessica Hall, Alexander Barzilov, Vladimir Dobrokhotov, Landon Oakes, and Alex Kengne

Subjects
nanosprings, sensor, electronic nose, Chemical technology, TP1-1185
Abstract

Chemiresistors (conductometric sensor) were fabricated on the basis of novel nanomaterials—silica nanosprings ALD coated with ZnO. The effects of high temperature and UV illumination on the electronic and gas sensing properties of chemiresistors are reported. For the thermally activated chemiresistors, a discrimination mechanism was developed and an integrated sensor-array for simultaneous real-time resistance scans was built. The integrated sensor response was tested using linear discriminant analysis (LDA). The distinguished electronic signatures of various chemical vapors were obtained at ppm level. It was found that the recovery rate at high temperature drastically increases upon UV illumination. The feasibility study of the activation method by UV illumination at room temperature was conducted.

Published
2012
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5. Thermal and Optical Activation Mechanisms of Nanospring-Based Chemiresistors

Author

Giancarlo Corti, Alexander Larin, Tej Prakash, Alex Kengne, Joseph Williams, Landon Oakes, Leah Bergman, David N. McIlroy, Jessica Hall, Dewayne Sowell, Pavel V Bakharev, Timothy Cantrell, Vladimir Dobrokhotov, Alexander Barzilov, and Jesse Huso

Subjects
electronic nose, Materials science, Electronic nose, Chemical vapors, Nanotechnology, lcsh:Chemical technology, Biochemistry, Article, Atomic and Molecular Physics, and Optics, Analytical Chemistry, Recovery rate, sensor, nanosprings, Thermal, lcsh:TP1-1185, Electrical and Electronic Engineering, Activation method, Instrumentation
Abstract

Chemiresistors (conductometric sensor) were fabricated on the basis of novel nanomaterials--silica nanosprings ALD coated with ZnO. The effects of high temperature and UV illumination on the electronic and gas sensing properties of chemiresistors are reported. For the thermally activated chemiresistors, a discrimination mechanism was developed and an integrated sensor-array for simultaneous real-time resistance scans was built. The integrated sensor response was tested using linear discriminant analysis (LDA). The distinguished electronic signatures of various chemical vapors were obtained at ppm level. It was found that the recovery rate at high temperature drastically increases upon UV illumination. The feasibility study of the activation method by UV illumination at room temperature was conducted.

Published
2012

6. Thermal and Optical Activation Mechanisms of Nanospring-Based Chemiresistors

Author

Dobrokhotov, Vladimir, primary, Oakes, Landon, additional, Sowell, Dewayne, additional, Larin, Alexander, additional, Hall, Jessica, additional, Barzilov, Alexander, additional, Kengne, Alex, additional, Bakharev, Pavel, additional, Corti, Giancarlo, additional, Cantrell, Timothy, additional, Prakash, Tej, additional, Williams, Joseph, additional, Bergman, Leah, additional, Huso, Jesse, additional, and McIlroy, David, additional

Published
2012
Full Text
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