| Title: | Exploitation of Schottky-Junction-based Sensors for Specifically Detecting ppt-Concentration Gases |
| Author(s): | Xu S; Yang C; Tian Y; Lu J; Jiang Y; Guo H; Zhao J; Peng H; |
| Address: | "Songshan Lake Materials Laboratory, Dongguan523808, P. R. China. State Key Laboratory of Mesoscopic Physics and Department of Physics, Peking University, Beijing100871, P. R. China. International Center for Quantum Materials, School of Physics, Peking University, Beijing100871, P. R. China. Collaborative Innovation Center of Quantum Matter, Beijing100871, P. R. China. Interdisciplinary Institute of Light-Element Quantum Materials and Research Center for Light-Element Advanced Materials, Peking University, Beijing100871, P. R. China. The Institute of Physics, Chinese Academy of Sciences, Beijing100190, P. R. China. Center for Nanochemistry, Beijing Science and Engineering Center for Nanocarbons, Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing100871, P. R. China" |
| DOI: | 10.1021/acssensors.2c01591 |
| ISSN/ISBN: | 2379-3694 (Electronic) 2379-3694 (Linking) |
| Abstract: | "Gas species and concentrations of human-exhaled breath correlate with health, wherein disease markers contain volatile organic compounds (VOCs) of concentrations in parts per billion. It is expected that a gas-sensing strategy possesses a gas specificity and detection limit in the parts per trillion (ppt) range; however, it is still a challenge. This investigation has exploited the Schottky junction of gas sensors for detecting the reactance signal of ppt VOC, aiming for a specific and rapid detection toward disease marker acetone. In this new sensing paradigm, formed by the engineered energy band between metal-semiconductor contact, the Schottky junction is accessed to specific modulation of different adsorbate dopings and the corresponding reactance signal is measured. Regarding the detection toward ppt concentration of acetone, this sensing paradigm possesses rapid ( approximately 100 s) and room-temperature response, molecular specificity, and 34 ppt of detection limit. The proposed detection paradigm is demonstrated to show a high feasibility toward detection of disease marker acetone" |
| Keywords: | Humans *Gases Breath Tests Acetone Exhalation *Volatile Organic Compounds Schottky junction gas sensor molecular specificity ppt detection limit two-dimensional material; |
| Notes: | "MedlineXu, Shipu Yang, Chen Tian, Ye Lu, Jing Jiang, Ying Guo, Hanjie Zhao, Jinkui Peng, Hailin eng Research Support, Non-U.S. Gov't 2022/12/09 ACS Sens. 2022 Dec 23; 7(12):3764-3772. doi: 10.1021/acssensors.2c01591. Epub 2022 Dec 8" |
