Humidity sensors using in-situ synthesized sodium polystyrenesulfonate/ZnO nanocomposites
SENSORS, 2002 IEEE - Tập 1 - Trang 207-211 vol.1
Tóm tắt
Thin film humidity sensor has been prepared using in-situ synthesized inorganic/organic nanocomposites of sodium polystyrenesulfonate (NaPSS) and ZnO. Its humidity sensing characteristics and the sensing mechanism have been investigated by measuring the complex impedance spectra of the sensor at different humidities. The logarithm of the impedance of sensor based on composite film changes linearly by 4 orders of magnitude over almost the whole humidity range (11%/spl sim/97%RH). Furthermore, the sensor exhibits a quick response (absorption: 2 sec., desorption: 2 sec.) and small hysteresis (less than 2%RH). The composite film shows better sensing properties than NaPSS film, such as better linearity, quicker response. Explanation of the improvement is attempted by taking into account the composition and structure of the nanocomposites.
Từ khóa
#Humidity #Zinc oxide #Nanocomposites #Sensor phenomena and characterization #Electrodes #Material storage #Optical films #Optical polymers #Magnetic sensors #Thin film sensorsTài liệu tham khảo
10.1016/0254-0584(95)01629-9
10.1016/0032-3861(89)90081-5
maehashi, 1993, Electrical Engineering in Japan, 30, 28
10.1016/0925-4005(95)85152-6
10.1016/S0925-4005(00)00313-0
10.1016/S0925-4005(00)00703-6
10.1016/S0379-6779(99)00132-0
10.1016/S0021-8502(97)10032-5
novak, 1993, Adv. Mater, 5, 422
10.1016/S0254-0584(00)00386-2
10.1016/S0167-2738(97)00349-4
10.1016/S0925-4005(99)00364-0
10.1016/S0167-2738(00)00334-9
10.1016/S0167-2738(98)00376-2
bernard, 1991, Ceram Soc, 74, 697, 10.1111/j.1151-2916.1991.tb06911.x
10.1016/S0925-4005(97)80265-1
yana, 1998, Chin Chem Lett, 9, 223
yang, 1999, Polym Sci, 74
10.1016/S0925-4005(99)00187-2
10.1016/S0925-4005(96)02019-9
10.1016/S0925-4005(01)00611-6
10.1016/S0925-4005(01)00966-2
10.1002/macp.1981.021820135
li, 0, Chinese Journal of Polymer Science in press
10.1016/S0167-2738(00)00688-3
pope, 1951, 9
10.1016/0250-6874(88)80046-5
10.1016/S0042-207X(98)00105-5