Ultrasensitive single crystalline TeO2 nanowire based hydrogen gas sensors

作者：Yan Changzeng; Binh Huy Le; Kang Dae Joon^*

来源：Journal of Materials Chemistry A, 2014, 2(15): 5394-5398.

DOI：10.1039/c4ta00135d

We report a high performance tellurium dioxide (TeO2) nanowire (NW)-based hydrogen gas sensor fabricated by standard photolithography. High-quality single crystalline TeO2 NWs were synthesized using gold as a catalyst with high reproducibility. The resulting NW diameters were as small as 30 nm. The gas sensing properties were investigated at various temperatures at two different H-2 concentrations (0.5% and 1%). We observed Delta R/R responses of 28% and 57% at 25 degrees C and 140 degrees C, respectively. Furthermore, detailed sensitivity-versus-temperature analysis shows that sensitivity of up to 138% can be obtained at 140 degrees C for 1% H-2 concentration.

• 出版日期2014
• 单位McGill