| Title |
Capacitive Humidity Sensors using lodine-doped Polyphenylacetylene Thin Films |
| Authors |
민남기(Min, Nam-Ki) ; 진준형(Jin, Joon-Hyung) ; 김태윤(Kim, Tae-Yoon) ; 홍석인(Hong, Suk-In) |
| Keywords |
정전용량형 습도센서 ; I_2-doped PPA 박막 ; 마이크로 센서 ; |
| Abstract |
We report the results of a preliminary investigation on capacitive humidity sensors using iodine-doped polyphenylacetylene(PPA) thin films. PPA was prepared from phenylacetylene(PA), chemically doped with iodine, and characterized by DSC, ^1H-NMR and FTIR spectra. The iodine-doped PPA sensors showed a sensitivity of 0.20pF/%RH, a linearity of 3.8%FS, a negligible hysteresis, and a low temperature coefficients of 0.043~0.067pF/°C over a wide range of relative humidity. These results are expected to open up the possibility of iodine-doped PPA thin films as relative humidity sensors. |