TY - JOUR
T1 - SnO2 Nanostructured Thin Films for Room-Temperature Gas Sensing of Volatile Organic Compounds
AU - Haddad, Kelsey
AU - Abokifa, Ahmed
AU - Kavadiya, Shalinee
AU - Lee, Byeongdu
AU - Banerjee, Sriya
AU - Raman, Baranidharan
AU - Banerjee, Parag
AU - Lo, Cynthia
AU - Fortner, John
AU - Biswas, Pratim
N1 - Funding Information:
This research is based upon work supported in part by the Solar Energy Research Institute for India and the U.S. (SERIIUS) funded jointly by the U.S. Department of Energy subcontract DE AC36-08G028308 (Office of Science, Office of Basic Energy Sciences, and Energy Efficiency and Renewable Energy, Solar Energy Technology Program, with support from the Office of International Affairs) and the Government of India subcontract IUSSTF/JCERDC-SERIIUS/2012 dated 22nd Nov 2012. This research used resources of the Advanced Photon Source, a U.S. Department of Energy (DOE) Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory under Contract No. DE-AC02-06CH11357. The authors acknowledge financial support from Washington University in St. Louis and the Institute of Materials Science and Engineering for the use of instruments and staff assistance. K.H. would like to acknowledge the McDonnell International Scholars Academy for their financial support.
Publisher Copyright:
Copyright © 2018 American Chemical Society.
PY - 2018/9/5
Y1 - 2018/9/5
N2 - 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.
AB - 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.
KW - aerosol chemical vapor deposition
KW - DFT calculations
KW - metal-oxide nanostructures
KW - sensors
KW - thin films
UR - http://www.scopus.com/inward/record.url?scp=85052298294&partnerID=8YFLogxK
U2 - 10.1021/acsami.8b08397
DO - 10.1021/acsami.8b08397
M3 - Article
C2 - 30086231
AN - SCOPUS:85052298294
SN - 1944-8244
VL - 10
SP - 29972
EP - 29981
JO - ACS Applied Materials and Interfaces
JF - ACS Applied Materials and Interfaces
IS - 35
ER -