Nanocrystalline ZnO quantum dots (QD) with a diameter of 10 nm was synthesized and tested toward eight different toxic industrial chemicals (i.e., nitrogen dioxide (NO₂), hydrogen sulfide (H₂S), ammonia (NH₃), carbon monoxide (CO), methane (CH₄), ethanol (C₂H₅OH), acetone (CH₃)₂CO, and toluene (C₆H₅CH₃)) with a broad concentration range at five different operating temperatures. Systemic studies allow to determine the kinetics of gas sensing as well as the competing reactions of analytes with sensing material and adsorbed oxygen. ZnO QD showed an excellent sensing performance toward NO₂ and H₂S in comparison to other target analytes. The selectivity can be further improved by controlling the operating temperature (i.e., higher selectivity toward NO₂ and H₂S were achieved at 300 °C and 450 °C, respectively). Moreover, the optimal temperature was found to be analyte dependent.

合成了直径为 10 nm 的纳米晶 ZnO 量子点 (QD)，并针对八种不同的有毒工业化学品（即二氧化氮(NO ₂ )、硫化氢 (H ₂ S)、氨 (NH ₃ )、一氧化碳 ( CO)、甲烷(CH ₄ )、乙醇(C ₂ H ₅ OH)、丙酮(CH ₃ ) ₂ CO、甲苯(C ₆ H ₅ CH ₃)) 在五种不同的工作温度下具有广泛的浓度范围。系统研究可以确定气体传感的动力学以及分析物与传感材料和吸附氧的竞争反应。与其他目标分析物相比， ZnO QD 对 NO ₂和 H ₂ S表现出出色的传感性能。通过控制操作温度可以进一步提高选择性（即分别在 300 °C 和 450 °C 时实现对 NO ₂和 H _{2 S 的更高选择性）。}此外，发现最佳温度取决于分析物。