Development of a low-cost hand-held nitric oxide (NO) sensor with high selectivity, sensitivity and low detection limit is attractive for environment and health monitoring applications. NO gas sensor was fabricated using hydrothermally grown ZnO nanorods (ZnO NRs). The sensing performance like sensor response, sensitivity, detection limit has been improved significantly by attaching gold nanoparticles (Au NPs) with ZnO NRs. Au NPs were synthesized by chemical reduction method from gold chloride trihydrate. The attachment of Au NPs on nanorods was done by spin coating method. The maximum sensor response and sensitivity were obtained at $\sim 100^{\circ }$C operating temperature with $300\mu$l gold loading. The interference study of the sensor was carried out with acetone, ammonia, carbon monoxide, hydrogen peroxide and propanol. It demonstrated high selectivity towards the interfering gases and high humid condition. Au-decorated ZnO NRs exhibited very low detection limit $\sim 6.6$$$ppb, which is attractive for biomedical applications.

开发具有高选择性、高灵敏度和低检测限的低成本手持式一氧化氮 (NO) 传感器对于环境和健康监测应用具有吸引力。 NO 气体传感器是使用水热生长的 ZnO 纳米棒 (ZnO NR) 制造的。通过将金纳米颗粒 (Au NP) 与 ZnO NR 附着，传感器响应、灵敏度、检测限等传感性能得到显着改善。以三水氯化金为原料，采用化学还原法合成了纳米金。 Au NPs 在纳米棒上的附着是通过旋涂法完成的。最大传感器响应和灵敏度获得于$～100^{\circ }$C 工作温度$300\mu$l 金装。使用丙酮、氨、一氧化碳、过氧化氢和丙醇对传感器进行了干扰研究。它表现出对干扰气体和高湿度条件的高选择性。 Au 修饰的 ZnO NRs 表现出非常低的检测限$～6。6$$$ppb，这对生物医学应用很有吸引力。