Yuri Gagarin State Technical University of Saratov, 77 Politechnicheskaya Street, 410054, Saratov, Russia; V. A. Kotel'nikov Institute of RadioEng. & Electr. of RAS, Saratov Branch, 38 Zelenaya Street, 410019, Saratov, Russia.
Yuri Gagarin State Technical University of Saratov, 77 Politechnicheskaya Street, 410054, Saratov, Russia.
Anal Chim Acta. 2015 Oct 15;897:81-6. doi: 10.1016/j.aca.2015.09.029. Epub 2015 Sep 25.
Nanocrystalline potassium polytitanates K2O·nTiO2·mH2O represent a new type of semiconducting compounds which are characterized by a high specific surface that makes them promising for use in gas sensors. In this work, we have studied potassium polytitanate mesoporous nanoparticle agglomerates placed over a SiO2/Si substrate equipped with multiple coplanar electrodes to measure the electrical response to various organic vapors, 1000 ppm of concentration, mixed with air by impedance spectrometry in range of the 10(-2)-10(6) Hz. The recorded impedance data for each sensor segment are associated with RC components of an equivalent circuit which are applied to selectively recognize the test vapors exploiting a "multisensor array" approach.
纳米晶钛酸钾 K2O·nTiO2·mH2O 代表了一种新型的半导体化合物，其特点是具有高比表面积，这使得它们有望在气体传感器中得到应用。在这项工作中，我们研究了放置在 SiO2/Si 衬底上的具有介孔纳米颗粒团聚体的钛酸钾，该衬底上装有多个共面电极，用于通过阻抗谱法测量对各种有机蒸气（浓度为 1000 ppm）与空气混合的电响应，频率范围为 10(-2)-10(6) Hz。为每个传感器段记录的阻抗数据与等效电路的 RC 分量相关联，这些分量被应用于通过“多传感器阵列”方法选择性地识别测试蒸气。
