| Title: | Detection of n-Propanol Down to the Sub-ppm Level Using p-Type Delafossite AgCrO(2) Nanoparticles |
| Author(s): | Li W; Li X; Zong Y; Kong L; Zhu W; Xu M; Liu H; |
| Address: | "Key Laboratory of Advanced Display and System Applications of Ministry of Education, Shanghai University, 149 Yanchang Road, Shanghai200072, China. Department of Micro/Nano Electronics, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai200240, China. School of Microelectronics, Fudan University, Shanghai200433, China" |
| DOI: | 10.1021/acssensors.2c02182 |
| ISSN/ISBN: | 2379-3694 (Electronic) 2379-3694 (Linking) |
| Abstract: | "As an important biomarker of lung cancer, n-propanol at the sub-ppm level is still challenging to be detected for a simple and immediate early diagnosis. In this work, a new n-propanol gas sensor with an ultralow detection limit down to 100 ppb is presented using AgCrO(2) nanoparticles synthesized by a simple hydrothermal method. Compared with the congeneric CuCrO(2) and commercial SnO(2), AgCrO(2) exhibits prevailing performances, including a higher selectivity, dynamic response, and logarithmical linearity but lower working temperature. The first-principles calculation and the energy band theoretical analysis are combined to elucidate the sensing mechanism, in which the chemical adsorption of gaseous molecules to silver followed by the dehydrogenation on chromium on the surface of AgCrO(2) is responsible for the outstanding susceptibility toward n-propanol. The proposed metal oxide semiconductor gas sensor capable of sub-ppm n-propanol detection provides a route to design and optimize the sensitive material system for the advanced trace detection of the volatile organic compounds" |
| Keywords: | *1-Propanol Propanols *Nanoparticles Adsorption Chromium Gases AgCrO2 gas sensor metal oxide semiconductor n-propanol volatile organic compounds; |
| Notes: | "MedlineLi, Wentao Li, Xuyang Zong, Yu Kong, Lingwei Zhu, Wenhuan Xu, Min Liu, Hai eng Research Support, Non-U.S. Gov't 2022/12/31 ACS Sens. 2023 Jan 27; 8(1):289-296. doi: 10.1021/acssensors.2c02182. Epub 2022 Dec 30" |
