SnO2 Nanostructured Thin Films for Room-Temperature Gas Sensing of Volatile Organic Compounds
| Autor: | Sriya Banerjee, Ahmed A. Abokifa, Cynthia S. Lo, Shalinee Kavadiya, John D. Fortner, Parag Banerjee, Kelsey Haddad, Byeongdu Lee, Baranidharan Raman, Pratim Biswas |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Oxide chemistry.chemical_element 02 engineering and technology Chemical vapor deposition 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Oxygen 0104 chemical sciences Aerosol Metal chemistry.chemical_compound Adsorption Chemical engineering chemistry visual_art visual_art.visual_art_medium Deposition (phase transition) General Materials Science Thin film 0210 nano-technology |
| Zdroj: | ACS Applied Materials & Interfaces. 10:29972-29981 |
| ISSN: | 1944-8252 1944-8244 |
| Popis: | We demonstrated room-temperature gas sensing of volatile organic compounds (VOCs) using SnO2 nanostructured thin films grown via the aerosol chemical vapor deposition process at deposition temperatures ranging from 450 to 600 °C. We investigated the film’s sensing response to the presence of three classes of VOCs: apolar, monopolar, and biopolar. The synthesis process was optimized, with the most robust response observed for films grown at 550 °C as compared to other temperatures. The role of film morphology, exposed surface planes, and oxygen defects were explored using experimental techniques and theoretical calculations to improve the understanding of the room-temperature gas sensing mechanism, which is proposed to be through the direct adsorption of VOCs on the sensor surface. Overall, the improved understanding of the material characteristics that enable room-temperature sensing gained in this work will be beneficial for the design and application of metal oxide gas sensors at room temperature. |
| Databáze: | OpenAIRE |
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