Publications (2)1.32 Total impact
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Article: Micro-structure sensors based on ZnO microcrystals with contact-controlled ethanol sensing
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ABSTRACT: ZnO microcrystals are synthesized through a facile solution method and characterized by field-emission scanning electron microscopy, transmission electron microscopy, selected area electron diffraction and X-ray diffraction. The ethanol sensing properties of these microcrystals are investigated by spin-coating them on a silicon substrate with Pt electrodes to fabricate a micro-structure sensor. The sensitivity is up to 8 when the sensor is exposed to 50 ppm ethanol, and the response time and recovery time are 10 s and 20 s, respectively. A contact-controlled model is established to explain the sensing properties of the microcrystals, which provides another approach to realize high-performance gas sensors.Chinese Science Bulletin 04/2012; 54(23):4371-4375. · 1.32 Impact Factor -
Article: Preparation, characterization, and gas-sensing properties of Pd-doped In2O3 nanofibers
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ABSTRACT: Pure and Pd-doped In2O3 nanofibers are synthesized via a simple electrospinning method and characterized by scanning electron microscopy and X-ray diffraction. Comparing with pure In2O3 nanofibers, Pd-doped In2O3 nanofibers exhibit much higher sensitivity to ethanol at 200 °C. The sensor fabricated from Pd-doped In2O3 nanofibers can detect ethanol down to 1 ppm (the corresponding sensitivity is 4) with good selectivity, and the response and recovery times are 1 and 10 s, respectively. The sensing mechanism and the effect of Pd doping are discussed. The results indicate that the Pd-doped In2O3 nanofibers can be used to fabricate high performance ethanol sensors.Materials Letters. 63(23):1975-1977.
