期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 112, 期 35, 页码 13442-13446出版社
AMER CHEMICAL SOC
DOI: 10.1021/jp8021024
关键词
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资金
- Ministry of Science and Technology of China [2006CB605105, 2006CBOL0601]
- Natural Science Foundation of China [10674077, 10774084]
- Ministry of Education of China
We have studied the adsorption of gas molecules (CO, NO, NO2, O-2, N-2, CO2, and NH3) on graphene nanoribbons (GNRs) using first principles methods. The adsorption geometries, adsorption energies, charge transfer, and electronic band structures are obtained. We find that the electronic and transport properties of the GNR with an-nchair-shaped edges are sensitive to the adsorption of NH3, and the system exhibits n-type semiconducting behavior after NH3 adsorption. Other gas molecules have little effect on modifying the conductance of GNRs. Quantum transport calculations further indicate that NH3 molecules can be detected out of these gas molecules by the GNR-based sensor.
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