산소 분위기 열처리에 따른 ZnO 나노선의 상온 영역에서의 수소가스 검출 특성 향상
Enhanced Hydrogen Gas Sensing Properties of ZnO Nanowires Gas Sensor by Heat Treatment under Oxygen Atmosphere
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ZnO nanowires were synthesized and annealed at various temperatures of 500-800oC in oxygen atmosphere to investigate hydrogen gas sensing properties. The diameter and length of the synthesized ZnO nanowires were approximately 50-100 nm and a few 10s μm, respectively. H2 gas sensing performance of the ZnO nanowires sensor was measured with electrical resistance changes caused by H2 gas with a concentration of 0.1-2.0%. The response of ZnO nanowires at room temperature to 2.0% H2 gas is found to be two times enhanced by annealing process in O2 atmosphere at 800oC. In the current study, the effect of heat treatment in O2 atmosphere on the gas sensing performance of ZnO nanowires was studied. And the underlying mechanism for the sensing improvement of the ZnO nanowires was also discussed.
Abstract
ZnO nanowires were synthesized and annealed at various temperatures of 500-800oC in oxygen atmosphere to investigate hydrogen gas sensing properties. The diameter and length of the synthesized ZnO nanowires were approximately 50-100 nm and a few 10s μm, respectively. H2 gas sensing performance of the ZnO nanowires sensor was measured with electrical resistance changes caused by H2 gas with a concentration of 0.1-2.0%. The response of ZnO nanowires at room temperature to 2.0% H2 gas is found to be two times enhanced by annealing process in O2 atmosphere at 800oC. In the current study, the effect of heat treatment in O2 atmosphere on the gas sensing performance of ZnO nanowires was studied. And the underlying mechanism for the sensing improvement of the ZnO nanowires was also discussed.
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