A Highly ordered CdS nanoflake array was fabricated by CVD, and its gas sensing characteristics were investigated. The sensor exhibited high response (resistance ratio) of 89% to 5 part per million (ppm) nitrogen dioxide (NO₂) under green LED illumination (wavelength 500–540 nm, irradiance 21 W/m²) with excellent selectivity and little interference by humidity. Moreover, the sensor showed promising potential for operating under fluorescent lamp and natural solar light, which can be used for medical diagnosis and indoor/outdoor environment monitoring. This performance is attributed to the low band gap energy (2.4 eV) of CdS and the unique morphology of nanoflake array which can enhance both the light absorption and conductivity.

利用CVD法制备了高序CdS纳米片阵列，并对其气敏特性进行了研究。该传感器在绿色LED照明（波长500–540 nm，辐照度21 W / m ²）下表现出89％至百万分之五（ppm）的二氧化氮（NO ₂）的高响应（电阻率），选择性极佳，干扰极小受湿度影响。此外，该传感器在荧光灯和自然太阳光下具有广阔的应用前景，可用于医疗诊断和室内/室外环境监测。此性能归因于CdS的低带隙能（2.4 eV）和纳米片状阵列的独特形态，可同时提高光吸收和电导率。