Park Sunghoon, Kim Soohyun, Ko Hyunsung, Lee Chongmu
J Nanosci Nanotechnol. 2014 Dec;14(12):9025-8. doi: 10.1166/jnn.2014.10065.
ZnO-core/ZnS-shell nanowires were synthesized by the thermal evaporation of a mixture of ZnO and graphite powders followed by the thermal evaporation of ZnS powders. Multiple networked nanowire gas sensors were then fabricated using the core-shell nanowires. The morphology, crystal structure and sensing properties of the ZnO-core/ZnS-shell nanowires to C2H5OH gas at room temperature under ultraviolet (UV) illumination were examined. The responses of the ZnO-core/ZnS-shell nanowires to C2H5OH gas were 1.2-2.1 times higher than those of the ZnO nanowires at C2H5OH concentrations ranging from 50 to 250 ppm under UV illumination. On the other hand, the resistance of the ZnO nanowires in the dark at room temperature was too high to measure. The underlying mechanism for the enhanced gas sensing properties of the ZnO-core/ZnS-shell nanowires toward C2H5OH gas is discussed.
通过热蒸发氧化锌和石墨粉末的混合物，随后热蒸发硫化锌粉末，合成了氧化锌核/硫化锌壳纳米线。然后使用核壳纳米线制造了多个网络化纳米线气体传感器。研究了氧化锌核/硫化锌壳纳米线在室温下紫外光照射下对乙醇气体的形貌、晶体结构和传感特性。在紫外光照射下，乙醇浓度在50至250 ppm范围内时，氧化锌核/硫化锌壳纳米线对乙醇气体的响应比氧化锌纳米线高1.2至2.1倍。另一方面，室温下黑暗环境中氧化锌纳米线的电阻过高，无法测量。讨论了氧化锌核/硫化锌壳纳米线对乙醇气体传感性能增强的潜在机制。
