Thermal and Optical Activation Mechanisms of Nanospring-Based Chemiresistors
| Autor: | 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, Alex Kengne |
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| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Předmět: | |
| Zdroj: | Sensors, Vol 12, Iss 5, Pp 5608-5622 (2012) |
| Druh dokumentu: | article |
| ISSN: | 1424-8220 70636850 |
| DOI: | 10.3390/s120505608 |
| Popis: | 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. |
| Databáze: | Directory of Open Access Journals |
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