期刊
CHEMOSENSORS
卷 8, 期 3, 页码 -出版社
MDPI
DOI: 10.3390/chemosensors8030082
关键词
graphene oxide; gas detection; nanomechanical sensors; Membrane-type Surface Stress Sensors (MSS)
资金
- Leading Initiative for Excellent Young Researchers, Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan
- MEXT, Japan [20K05345, 18H04168]
- Iketani Science and Technology Foundation, Japan
- Murata Science Foundation, Japan
- Public/Private R&D Investment Strategic Expansion Program (PRISM), Cabinet Office, Japan
- Mitacs-JSPS Summer Program, Japan Society for the Promotion of Science (Japan) and Mitacs (Canada)
- World Premier International Research Center Initiative (WPI) on Materials Nanoarchitectonics (MANA), NIMS
- MSS Forum
- Grants-in-Aid for Scientific Research [20K05345, 18H04168] Funding Source: KAKEN
Graphene is a key material for gas sensing applications owing to its high specific surface area and vast chemical modification potential. To fully utilize the potential of graphene, a sensing platform independent of conductive properties is required. In this study, we employed membrane-type surface stress sensors (MSS)-A kind of nanomechanical sensor operated in the static mode-As a sensing platform and utilized graphene oxide (GO) as a gas sensing material. MSS detect surface stress caused by gas sorption; therefore, chemically modified graphene with low conductivity can be utilized as a gas sensing material. We evaluated the sensing performance of a GO-coated MSS by measuring its responses to five gases. We demonstrated with the GO-coated MSS the feasibility of GO as a gas sensing material for static mode nanomechanical sensors and revealed its high selectivity to water vapor. Moreover, we investigated the sensing mechanism of the GO-coated MSS by comparing it with the sensing performance of MSS coated with reduced graphene oxide and graphite powder and deduced key factors for sensitivity and selectivity. Considering the high sensitivity of the GO-coated MSS and the compact measurement system that MSS can realize, the present study provides a new perspective on the sensing applications of graphene.
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