| Title: | Organic Vapor Sensing Mechanisms by Large-Area Graphene Back-Gated Field-Effect Transistors under UV Irradiation |
| Author(s): | Drozdowska K; Rehman A; Sai P; Stonio B; Krajewska A; Dub M; Kacperski J; Cywinski G; Haras M; Rumyantsev S; Osterlund L; Smulko J; Kwiatkowski A; |
| Address: | "Department of Metrology and Optoelectronics, Faculty of Electronics, Telecommunications, and Informatics, Gdansk University of Technology, G. Narutowicza 11/12, 80-233 Gdansk, Poland. CENTERA Laboratories, Institute of High Pressure Physics PAS, 01-142 Warsaw, Poland. Centre for Advanced Materials and Technologies CEZAMAT, Warsaw University of Technology, 02-822 Warsaw, Poland. Institute of High Pressure Physics PAS, Sokolowska 29/37, 01-142 Warsaw, Poland. Department of Materials Science and Engineering, The Angstrom Laboratory, Uppsala University, P. O. Box 35, 75103 Uppsala, Sweden" |
| DOI: | 10.1021/acssensors.2c01511 |
| ISSN/ISBN: | 2379-3694 (Electronic) 2379-3694 (Linking) |
| Abstract: | "The gas sensing properties of graphene back-gated field-effect transistor (GFET) sensors toward acetonitrile, tetrahydrofuran, and chloroform vapors were investigated with the focus on unfolding possible gas detection mechanisms. The FET configuration of the sensor device enabled gate voltage tuning for enhanced measurements of changes in DC electrical characteristics. Electrical measurements were combined with a fluctuation-enhanced sensing methodology and intermittent UV irradiation. Distinctly different features in 1/f noise spectra for the organic gases measured under UV irradiation and in the dark were observed. The most intense response observed for tetrahydrofuran prompted the decomposition of the DC characteristic, revealing the photoconductive and photogating effect occurring in the graphene channel with the dominance of the latter. Our observations shed light on understanding surface processes at the interface between graphene and volatile organic compounds for graphene-based sensors in ambient conditions that yield enhanced sensitivity and selectivity" |
| Keywords: | UV irradiation acetonitrile chloroform fluctuation-enhanced sensing graphene sensor organic vapors tetrahydrofuran; |
| Notes: | "PubMed-not-MEDLINEDrozdowska, Katarzyna Rehman, Adil Sai, Pavlo Stonio, Bartlomiej Krajewska, Aleksandra Dub, Maksym Kacperski, Jacek Cywinski, Grzegorz Haras, Maciej Rumyantsev, Sergey Osterlund, Lars Smulko, Janusz Kwiatkowski, Andrzej eng 2022/09/20 ACS Sens. 2022 Oct 28; 7(10):3094-3101. doi: 10.1021/acssensors.2c01511. Epub 2022 Sep 19" |
