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Thermal and Optical Activation Mechanisms of Nanospring-Based Chemiresistors

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 chemiresisto...

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Detalles Bibliográficos
Autores principales: Dobrokhotov, Vladimir, Oakes, Landon, Sowell, Dewayne, Larin, Alexander, Hall, Jessica, Barzilov, Alexander, Kengne, Alex, Bakharev, Pavel, Corti, Giancarlo, Cantrell, Timothy, Prakash, Tej, Williams, Joseph, Bergman, Leah, Huso, Jesse, McIlroy, David
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Molecular Diversity Preservation International (MDPI) 2012
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3386703/
https://www.ncbi.nlm.nih.gov/pubmed/22778604
http://dx.doi.org/10.3390/s120505608
Descripción
Sumario: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.