摘要
Graphene has been demonstrated to be able to detect individual gas molecules [Schedin et al. Nat. Mater. 6 （2007）652], which has attracted a lot of sensor research activities. Here we report for the first time that graphene is capable of detecting the ordering degree of absorbed water molecules. The efficiency of doping varies from the degrees of molecular ordering. The simulated results show that the highly ordered water molecules contribute more to the doping effect, which reduces the conductance of the water/graphene system.
Graphene has been demonstrated to be able to detect individual gas molecules [Schedin et al. Nat. Mater. 6 （2007）652], which has attracted a lot of sensor research activities. Here we report for the first time that graphene is capable of detecting the ordering degree of absorbed water molecules. The efficiency of doping varies from the degrees of molecular ordering. The simulated results show that the highly ordered water molecules contribute more to the doping effect, which reduces the conductance of the water/graphene system.
基金
Supported by the National Natural Science Foundation of China under Grant No 51271100, the National Basic Research Program of China under Grant No 2012CB825702, and the Special Funding in the Project of the Taishan Scholar Construction Engineering.
