Zoepfl, Alexander and Lemberger, Michael-Maximilian and Koenig, Matthias and Ruhl, Guenther and Matysik, Frank-Michael and Hirsch, Thomas (2014) Reduced graphene oxide and graphene composite materials for improved gas sensing at low temperature. FARADAY DISCUSSIONS, 173. pp. 403-414. ISSN 1359-6640, 1364-5498
Full text not available from this repository. (Request a copy)Abstract
Reduced graphene oxide (rGO) was investigated as a material for use in chemiresistive gas sensors. The carbon nanomaterial was transferred onto a silicon wafer with interdigital gold electrodes. Spin coating turned out to be the most reliable transfer technique, resulting in consistent rGO layers of reproducible quality. Fast changes in the electrical resistance at a low operating temperature of 85 degrees C could be detected for the gases NO2, CH4 and H-2. Especially upon adsorption of NO2 the high signal changes allowed a minimum detection of 0.3 ppm (S/N = 3). To overcome the poor selectivity, rGO was chemically functionalized with octadecylamine, or modified by doping with metal nanoparticles such as Pd and Pt, and also metal oxides such as MnO2, and TiO2. The different response patterns for six different materials allowed the discrimination of all of the test gases by pattern recognition based on principal component analysis.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | CHEMICALLY-MODIFIED GRAPHENE; ROOM-TEMPERATURE; SENSORS; NANOSHEETS; TRANSPORT; NANOCOMPOSITES; TRANSPARENT; PERFORMANCE; REDUCTION; SHEETS; |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Analytische Chemie, Chemo- und Biosensorik > Instrumentelle Analytik (Prof. Frank-Michael Matysik) |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 28 Nov 2019 11:05 |
| Last Modified: | 28 Nov 2019 11:05 |
| URI: | https://pred.uni-regensburg.de/id/eprint/10862 |
Actions (login required)
 |
View Item |
