The results of the development of gas chemical nanosensors with sensing elements based on titanium dioxide are presented in the review. The developed devices are systematized in accordance with the features of construction of their sensing elements. Four groups of nanosensors are specified: devices with sensing elements containing a coating of only titanium dioxide (Group 1), nanosensors with sensing elements containing a coating of a layer of titanium dioxide with an outer layer of another material (Group 2), devices with sensing elements containing a coating of a composite material based on titanium dioxide (Group 3), and nanosensors with sensing elements containing a coating of a layer of a composite material based on titanium dioxide with an outer layer of another material (Group 4). The analytical capabilities of the devices of these groups are assessed. Some patterns in their behavior are discussed. In particular, the potential of nanosensors in the identification of a large number of inorganic and organic chemical compounds is demonstrated. The effect of thickness, morphology, composition of the coating, and temperature of the sensing elements on the sensitivity and selectivity of measurements and the response and recovery times is shown.

中文翻译：

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具有基于二氧化钛的传感元件的气体化学纳米传感器

本综述介绍了具有基于二氧化钛的传感元件的气体化学纳米传感器的开发结果。所开发的设备根据其传感元件的结构特点进行系统化。指定了四组纳米传感器：具有仅包含二氧化钛涂层的传感元件的设备（第1组），具有包含二氧化钛层和另一种材料外层的涂层的传感元件的纳米传感器（第2组），具有传感元件包含基于二氧化钛的复合材料的涂层（第3组），以及具有传感元件的纳米传感器，该传感器包含基于二氧化钛的复合材料的涂层和另一种材料的外层（第4组）的涂层。评估这些组的设备的分析能力。讨论了其行为的一些模式。特别地，证明了纳米传感器在鉴定大量无机和有机化合物中的潜力。示出了厚度，形态，涂层组成和感测元件的温度对测量的灵敏度和选择性以及响应和恢复时间的影响。