Nanosensors Based on Graphene Inter-layer Electronic Properties: Sensing Mechanism and Selectivity

被引:0
|
作者
Rao, Fubo [1 ]
Almumen, Haider [1 ]
Li, Wen [1 ]
Dong, Lixin [1 ]
机构
[1] Michigan State Univ, Dept Elect & Comp Engn, E Lansing, MI 48824 USA
来源
2012 12TH IEEE CONFERENCE ON NANOTECHNOLOGY (IEEE-NANO) | 2012年
关键词
Graphene; nanosensors; inter-layer; bi-layer; mono-layer;
D O I
暂无
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Graphene-based nanosensors with inter-layer structures were built and tested as gas sensors in response to ethanol and water molecules, and were compared with intra-layer nanosensors built on mono-layer and bi-layer graphenes. Ethanol and water molecules were chosen because they act differently as donors and acceptors to graphenes. The results show that the sensitivities of the inter-layer graphene nanosensors were over two times higher than the ones based on the mono-layer and bi-layer graphenes under the same experimental conditions. Strong suppression of the tunneling current through the two stacked graphene layers was observed, which is mainly caused by the reconstruction of the microscopic corrugation due to the adsorption of gas molecules.
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页数:4
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