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Qin Z.,Institutes for Optoelectric Information and Technology | Qin Z.,Yunnan Normal University | Liu Y.,Institutes for Optoelectric Information and Technology | Liu Y.,Yunnan Normal University | And 10 more authors.
Chemical Physics Letters | Year: 2016

Pure In2O3 NBs and Er-In2O3 NBs have been successfully synthesized by carbon thermal reduction. The doping of Er leads the optimal temperature of the In2O3 to decrease. The response of the Er-In2O3 sensor to 100 ppm of alcohol is 4.8 at 220 °C, which is twice larger than that of the pure In2O3 sensor. It is also found that the doping of Er has increased the performance of the sensors. Moreover, Er-In2O3 sensor has a fast response (recovery) time to different concentration of alcohol at 220 °C. In addition, the mechanism of pure In2O3 sensor and Er-In2O3 sensor are discussed. © 2016 Published by Elsevier B.V. Source


Ma J.,Institutes for Optoelectric Information and Technology | Ma J.,Yunnan Normal University | Liu Y.,Institutes for Optoelectric Information and Technology | Liu Y.,Yunnan Normal University | And 10 more authors.
Sensors and Actuators, B: Chemical | Year: 2015

Sb-doped SnO2 nanoribbons (NRs) with a single crystal structure are synthesized via thermal evaporation. H2S gas sensor is developed based on a single Sb-SnO2 NR through dual-ion beam sputtering deposition with a mask template. The response of the Sb-SnO2 NR sensor has been measured up to 56-100 ppm of H2S at 150 °C. More importantly, this sensor shows a response of 10(1.6) toward 100 ppb of H2S at 150 °C(25 °C), which promotes the detection limit of H2S. The NR-based sensor also exhibits a high sensitivity, good selectivity and long-term stability with a prompt response time, demonstrating good sensing capabilities at room temperature. The mechanism for enhanced sensing performance of Sb-doped SnO2 nanoribbon is discussed. © 2015 Published by Elsevier B.V. Source

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