P1.4.3 Humidity sensing of poly(diallyldimethylammonium chloride)/single-walled carbon nanotube composite films fabricated by self-assembly technique
- 14th International Meeting on Chemical Sensors - IMCS 2012
2012-05-20 - 2012-05-23
- P1.4 Nanostructured Sensors
- H. Jing, Y. Jiang, X. Du, H. Tai, G. Xie - State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information, University of Electronic Science and Technology of China (UESTC) (P. R. China)
- 986 - 989
Single-walled carbon nanotube composite films were prepared on quartz crystal microbalance by self-assembly process, and their properties to relative humidity ranging from 20.9% to 80.2% were studied at room temperature. The treated SWNTs were characterized by Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy. Two kinds of SWNT sensors were fabricated using original SWNTs and carboxyl modified SWNTs as humidity sensitive material, respectively. The results showed that the sensitivity of the PDDA/SWNT-COOH humidity sensor was 20.23% higher than the PDDA/SWNT sensor. In contrast, the latter had a superior recovery property and the recovery time was 64 s, while that of the PDDA/SWNT-COOH sensor was 84 s. Both sensors had good repeatability and stability.