Dresden 2020 – scientific programme
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MM: Fachverband Metall- und Materialphysik
MM 24: Materials for Sensors and Actuators
MM 24.1: Talk
Tuesday, March 17, 2020, 11:45–12:00, IFW B
Supramolecular Functionalized Pristine Graphene Utilizing A Bio-compatible Stabilizer Towards Ultra-sensitive Ammonia Detection — •Shirong Huang1, Luis Antonio Panes-Ruiz1, Alexander Croy1, Leif Riemenschneider1, Vyacheslav Khavru2, Viktor Bezugly1,2,3, and Gianaurelio Cuniberti1,3 — 1Institute for Materials Science and Max Bergmann Center for Biomaterials, Technische Universität Dresden, 01062 Dresden, Germany — 2Life Science Inkubator Sachsen GmbH & Co. KG, Tatzberg 47, 01307 Dresden, Germany — 3Center for Advancing Electronics Dresden (cfAED), TU Dresden, 01062 Dresden, Germany
In this work, we develop pristine graphene-based gas sensors utilizing flavin monocleotide sodium salt (FMNS) towards ultra-sensitive ammonia detection. The sensor has 3% response upon exposure to 10 ppm NH3 and a limit of detection of 1.6 ppm at room temperature and shows a good recovery. Raman, UV-vis, FT-IR spectra, as well as SEM measurements are employed to characterized the quality of the graphene flakes, indicating a good structural quality of graphene with few defects. Complementary molecular dynamics simulation results show that FMNS molecules play two important roles for the graphene sensor: to stabilize graphene flakes via supramolecular functionalization and to act as binding sites for NH3 molecules. The process is very mild, environmentally friendly, and low cost. We believe this work may pave a path to design high performance gas sensor with low cost and boost the application of graphene for sensing.