SnO2 Nanostructured Thin Films for Room-Temperature Gas Sensing of Volatile Organic Compounds | Zendy

Kelsey Haddad | Zendy; Ahmed A. Abokifa | Zendy; Shalinee Kavadiya | Zendy; Byeongdu Lee | Zendy; Sriya Banerjee | Zendy; Baranidharan Raman | Zendy; Parag Banerjee | Zendy; Cynthia S. Lo | Zendy; John D. Fortner | Zendy; Pratim Biswas | Zendy

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SnO₂ Nanostructured Thin Films for Room-Temperature Gas Sensing of Volatile Organic Compounds

Author(s) -

Kelsey Haddad,

Ahmed A. Abokifa,

Shalinee Kavadiya,

Byeongdu Lee,

Sriya Banerjee,

Baranidharan Raman,

Parag Banerjee,

Cynthia S. Lo,

John D. Fortner,

Pratim Biswas

Publication year - 2018

Publication title -

acs applied materials and interfaces

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.535

H-Index - 228

eISSN - 1944-8252

pISSN - 1944-8244

DOI - 10.1021/acsami.8b08397

Subject(s) - materials science , thin film , chemical vapor deposition , adsorption , volatile organic compound , deposition (geology) , chemical engineering , nanotechnology , oxide , oxygen , water vapor , organic chemistry , metallurgy , paleontology , chemistry , sediment , engineering , biology

We demonstrated room-temperature gas sensing of volatile organic compounds (VOCs) using SnO 2 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.

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