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Enhanced room temperature gas sensing properties of low temperature solution processed ZnO/CuO heterojunction.
BMC Chem 2019; 13(1):4BC

Abstract

The development of room temperature gas sensors having response towards a specific gas is attracting researchers nowadays in the field. In the present work, room temperature (29 °C) ethanol sensor based on vertically aligned ZnO nanorods decorated with CuO nanoparticles was successfully fabricated by simple cost effective solution processing. The heterojunction sensor exhibits better sensor parameters compared to pristine ZnO. The response of the heterojunction sensor to 50 ppm ethanol is, at least, 2-fold higher than the response of the ZnO bare sensor. Also the response and recovery time of ZnO/CuO sensor to 50 ppm ethanol are of 9 and 420 s whereas the values are 16 and 510 s respectively for ZnO sensor. The vertical alignment of ZnO nanorods as well as its surface modification by CuO nanoparticles increased the effective surface area of the device and the formation of p-CuO/n-ZnO junction at the interface are the reasons for the improved performance at room temperature. In addition to ethanol, the fabricated device has the capability to detect the presence of reducing gases like hydrogen sulfide and ammonia at room temperature.

Authors+Show Affiliations

Nanophotonic and Optoelectronic Devices Laboratory, Department of Physics, Cochin University of Science and Technology, Kochi, 682022 Kerala India.Nanophotonic and Optoelectronic Devices Laboratory, Department of Physics, Cochin University of Science and Technology, Kochi, 682022 Kerala India.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31355365

Citation

Subha, P P., and M K. Jayaraj. "Enhanced Room Temperature Gas Sensing Properties of Low Temperature Solution Processed ZnO/CuO Heterojunction." BMC Chemistry, vol. 13, no. 1, 2019, p. 4.
Subha PP, Jayaraj MK. Enhanced room temperature gas sensing properties of low temperature solution processed ZnO/CuO heterojunction. BMC Chem. 2019;13(1):4.
Subha, P. P., & Jayaraj, M. K. (2019). Enhanced room temperature gas sensing properties of low temperature solution processed ZnO/CuO heterojunction. BMC Chemistry, 13(1), p. 4. doi:10.1186/s13065-019-0519-5.
Subha PP, Jayaraj MK. Enhanced Room Temperature Gas Sensing Properties of Low Temperature Solution Processed ZnO/CuO Heterojunction. BMC Chem. 2019;13(1):4. PubMed PMID: 31355365.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Enhanced room temperature gas sensing properties of low temperature solution processed ZnO/CuO heterojunction. AU - Subha,P P, AU - Jayaraj,M K, Y1 - 2019/01/29/ PY - 2017/08/28/received PY - 2019/01/16/accepted PY - 2019/7/30/entrez PY - 2019/7/30/pubmed PY - 2019/7/30/medline KW - Hydrothermal KW - Room temperature gas detection KW - ZnO/CuO hierarchical structure KW - p–n Heterojunction SP - 4 EP - 4 JF - BMC chemistry JO - BMC Chem VL - 13 IS - 1 N2 - The development of room temperature gas sensors having response towards a specific gas is attracting researchers nowadays in the field. In the present work, room temperature (29 °C) ethanol sensor based on vertically aligned ZnO nanorods decorated with CuO nanoparticles was successfully fabricated by simple cost effective solution processing. The heterojunction sensor exhibits better sensor parameters compared to pristine ZnO. The response of the heterojunction sensor to 50 ppm ethanol is, at least, 2-fold higher than the response of the ZnO bare sensor. Also the response and recovery time of ZnO/CuO sensor to 50 ppm ethanol are of 9 and 420 s whereas the values are 16 and 510 s respectively for ZnO sensor. The vertical alignment of ZnO nanorods as well as its surface modification by CuO nanoparticles increased the effective surface area of the device and the formation of p-CuO/n-ZnO junction at the interface are the reasons for the improved performance at room temperature. In addition to ethanol, the fabricated device has the capability to detect the presence of reducing gases like hydrogen sulfide and ammonia at room temperature. SN - 2661-801X UR - https://www.unboundmedicine.com/medline/citation/31355365/Enhanced_room_temperature_gas_sensing_properties_of_low_temperature_solution_processed_ZnO/CuO_heterojunction_ L2 - https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/31355365/ DB - PRIME DP - Unbound Medicine ER -