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Abstract
The C2H5OH gas sensors were developed using flame-made 0.75mol%Nb/ZnO NPs composite with P3HT as the sensing materials. The composite films of P3HT: 0.75mol% Nb/ZnO NPs in the ratio of 4:1, 3:1, 2:1, 1:1 and 1:2 were prepared by drop casting method onto Al2O3 substrates interdigitated with Au electrodes. The sensing films were analyzed by XRD, SEM and EDS. The gas sensing of C2H5OH was studied at the room temperatures. It was found that the composite films P3HT:0.75mol% Nb/ZnO NPs in the ratio of 2:1 showed the highest sensitivity and fast response time towards C2H5OH gas at room temperature.
Acknowledgments
The authors gratefully acknowledge the financial support from the Thailand Research Fund (TRF), the Office of the Higher Education Commission and Maejo University, Thailand (MRG5580067); the National Research Council of Thailand; the National Research University under the Office of Higher Education Commission; Materials Science Research Center, Faculty of Science, Chiang Mai University, Thailand and National Electronics and Computer Technology Center (NECTEC), Pathumthani, Thailand are gratefully acknowledged.