Abstract
Graphene is one of the most promising materials for high-performance gas sensors due to its unique properties such as high sensitivity at room temperature, transparency, and flexibility. However, the low selectivity and irreversible behavior of graphene-based gas sensors are major problems. Here, we present unprecedented room temperature hydrogen detection by Au nanoclusters supported on self-activated graphene. Compared to pristine graphene sensors, the Au-decorated graphene sensors exhibit highly improved gas-sensing properties upon exposure to various gases. In particular, an unexpected substantial enhancement in H 2 detection is found, which has never been reported for Au decoration on any type of chemoresistive material. Density functional theory calculations reveal that Au nanoclusters on graphene contribute to the adsorption of H atoms, whereas the surfaces of Au and graphene do not bind with H atoms individually. The discovery of such a new functionality in the existing material platform holds the key to diverse research areas based on metal nanocluster/graphene heterostructures.
| Original language | English |
|---|---|
| Pages (from-to) | 2966-2973 |
| Number of pages | 8 |
| Journal | Nanoscale |
| Volume | 11 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 2019 Feb 14 |
Bibliographical note
Funding Information:This work was financially supported by the Basic Science Research Program (2017R1A2B3009135 and 2018R1A4A1022647) and the Nano-Material Technology Development Program (2016M3A7B4910) through the National Research Foundation of Korea (NRF) and performed, in part, at the Center for Integrated Nanotechnologies, an Office of Science User Facility operated for the U.S. Department of Energy (DOE) Office of Science. Los Alamos National Laboratory, an affirmative action equal opportunity employer, is managed by Triad National Security, LLC for the U.S. Department of Energy's NNSA, under contract 89233218CNA000001.
Funding Information:
This work was financially supported by the Basic Science Research Program (2017R1A2B3009135 and 2018R1A4A1022647) and the Nano-Material Technology Development Program (2016M3A7B4910) through the National Research Foundation of Korea (NRF) and performed, in part, at the Center for Integrated Nanotechnologies, an Office of Science User Facility operated for the U.S. Department of Energy (DOE) Office of Science. Los Alamos National Laboratory, an affirmative action equal opportunity employer, is managed by Triad National Security, LLC for the U.S. Department of Energy’s NNSA, under contract 89233218CNA000001.
Publisher Copyright:
© 2019 The Royal Society of Chemistry.
ASJC Scopus subject areas
- Materials Science(all)