کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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742149 | 1462109 | 2013 | 6 صفحه PDF | دانلود رایگان |
A novel sensing graphene/polypyrrole (PPy) material was prepared by a chemical oxidative polymerization method with various weight percentages of graphene. The structure and morphology were characterized by XRD (X-ray diffraction), FTIR (Fourier transform infrared), TEM (transmission electron microscopy), UV–vis spectrometry and TGA (thermo-gravimetric analysis). The humidity sensing properties were measured by using an LCR (inductance, capacitance and resistance) analyzer. The results indicate that the sample with 10% graphene/PPy had better humidity sensing properties than the other samples at relative humidity (RH) in the range 12–90%. The response and recovery times were approximately 15 s and 20 s, respectively. The prepared sensor has a higher sensitivity (S = 138) than those developed elsewhere and the humidity hysteresis value was very small at all humidities (<0.16%). The results herein demonstrate the potential of graphene/PPy composite for use in fabricating high-performance humidity sensors.
Journal: Sensors and Actuators B: Chemical - Volume 181, May 2013, Pages 326–331