@article{Ovodok_Kormosh_Bilanych_Ivanovskaya_2022, title={Acetone Vapor Sensors Based on Tin Dioxide Doped by Au Nanoparticles}, volume={67}, url={https://ujp.bitp.kiev.ua/index.php/ujp/article/view/2022168}, DOI={10.15407/ujpe67.3.216}, abstractNote={<p>The effect of nano-sized gold particles on the adsorption-sensitive properties of SnO<sub>2</sub>–Au sensors under the detection of acetone vapors has been studied. Different techniques for the preparation of SnO<sub>2</sub>–Au nanocomposites with an average Au particle size of 2 nm were applied. It has been found that a fivefold increase in the sensor response to acetone vapors and threshold sensitivity (C<sub>lim</sub>) of 0.1 ppm are achieved by adding gold to tin dioxide in the colloidal form during synthesis. While adding gold in ion form (Au (III)) leads to a growth of the sensor response to acetone vapors by 2.7 times and defines C<sub>lim</sub> of 0.2 ppm. The slope of the calibration curves of the SnO<sub>2</sub>–Au sensors allows registering acetone vapors at concentrations ranging from C<sub>lim</sub> to 5 ppm. This concentration range can be used for the express diagnostics in diabetes. The enhanced sensitivity of SnO<sub>2</sub>–Au sensors to acetone vapors can be explained by an increase in the adsorption-catalytic activity of tin ions as a result of the modifying effect of sulfate groups and the envolving of highly dispersed gold in the adsorption – catalytic process of oxidation of acetone molecules.</p>}, number={3}, journal={Ukrainian Journal of Physics}, author={Ovodok, E. and Kormosh, V. and Bilanych, V. and Ivanovskaya, M.}, year={2022}, month={May}, pages={216} }