Organic molecular thin films as gas sensors
SENSORS, 2002 IEEE - Tập 2 - Trang 1144-1147 vol.2
Tóm tắt
In this paper we will present some interesting data on the gas sensitivity of very thin films of metal phthalocyanine (as copper phthalocyanine, CuPc) towards NO/sub 2/ at very low concentration (ppb). A thermal treatment following the deposition strongly enhances the gas sensitivity. We will relate this high gas sensitivity to the surface morphology of the film. In fact atomic force microscopy data indicate that after the thermal treatment the surface roughness strongly increases, while the crystalline structure, which is less influenced by the thermal process, gives a lower contribution to the gas sensing properties.
Từ khóa
#Thin film sensors #Gas detectors #Thermal force #Rough surfaces #Surface roughness #Surface morphology #Surface treatment #Atomic force microscopy #Transistors #CopperTài liệu tham khảo
lee, 2001, Appl Surf Sci, 173, 10.1016/S0169-4332(01)00019-8
zhou, 1998, Thin Solid Films, 317
kerp, 2000, Solar Energy Materials & Solar Cells, 63, 10.1016/S0927-0248(00)00040-4
ottaviano, 1999, Surf Sci, 431, 10.1016/S0039-6028(99)00495-1
collins, 1988, D Appl Phys, 21, 10.1088/0022-3727/21/1/021
schon, 2001, J Appl Phys, 89
ho, 2001, Sens Actuators B, 77, 10.1016/S0925-4005(01)00742-0
newton, 2000, G McHale Sens Actuators B, 67
hsieh, 1998, Thin Solid Films, 322, 10.1016/S0040-6090(97)00964-4
gould, 2001, Thin Solid Film, 432, 398
lee, 1999, Appl Phys Lett, 74
yakimov, 2002, Appl Phys Lett, 80
lee, 2001, Appl Surf Sci, 172, 10.1016/S0169-4332(00)00846-1