| Title: | Selectivity of volatile organic compounds on the surface of zinc oxide nanosheets for gas sensors |
| Author(s): | Thi Hong Hoa P; Chihaia V; Kim Le O; Hai PT; Quan DL; Thanh HT; Son DN; |
| Address: | "Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City, Vietnam. dnson@hcmut.edu.vn. Vietnam National University Ho Chi Minh City, Linh Trung Ward, Ho Chi Minh City, Vietnam. Institute of Physical Chemistry 'Ilie Murgulescu' of the Romanian Academy, Splaiul Independentei 202, Sector 6, 060021 Bucharest, Romania" |
| ISSN/ISBN: | 1463-9084 (Electronic) 1463-9076 (Linking) |
| Abstract: | "The detection of volatile organic compounds by gas sensors is of great interest for environmental quality monitoring and the early-stage and noninvasive diagnosis of diseases. Experiments found hexane, toluene, aniline, butanone, acetone, and propanol gases in the exhaled breath of patients suffering from COVID-19, lung cancer, and diabetes. However, no studies are available to systematically elucidate the selectivity of these gases on nanosheets of zinc oxide for chemiresistive and direct thermoelectric gas sensors. Therefore, this work performed the elucidation by studying the electronic, electrical, and thermal properties of the bilayered ZnO nanosheets with polar (0001) and non-polar (112?S0) surfaces under the adsorption of the gases. The interaction between the gases and the nanosheets belongs to two groups: electrostatic attraction and charge exchange. The second one occurs due to the peak resonance of the same type of orbitals between the substrates and the gases along the surface normal and the first one for the other cases. The characteristics of the Seebeck coefficient exhibited distinct selectivity of butanone and acetone" |
| Keywords: | Acetone/chemistry Butanones *covid-19 Gases Humans *Volatile Organic Compounds *Zinc Oxide/chemistry; |
| Notes: | "MedlineThi Hong Hoa, Phan Chihaia, Viorel Kim Le, Ong Hai, Pham Thanh Quan, Dang Long Thanh, Huynh Tat Son, Do Ngoc eng England 2022/08/23 Phys Chem Chem Phys. 2022 Aug 31; 24(34):20491-20505. doi: 10.1039/d2cp02243e" |
