Intrinsic carrier transport properties of single-walled carbon nanotubes have been probed by two parallel methods on the same individual tubes： The contactless dielectric force microscopy （DFM） technique and the co...Intrinsic carrier transport properties of single-walled carbon nanotubes have been probed by two parallel methods on the same individual tubes： The contactless dielectric force microscopy （DFM） technique and the conventional field-effect transistor （FET） method. The dielectric responses of SWNTs are strongly correlated with electronic transport of the corresponding FETs. The DC bias voltage in DFM plays a role analogous to the gate voltage in FET. A microscopic model based on the general continuity equation and numerical simulation is built to reveal the link between intrinsic properties such as carrier concentration and mobility and the macroscopic observable, i.e. dielectric responses, in DFM experiments. Local transport barriers in nanotubes, which influence the device transport behaviors, are also detected with nanometer scale resolution.展开更多
Dear Editor, The brassinosteroid （BR） signaling pathway has been well elucidated in Arabidopsis. The identification of BR-signaling components in rice suggested that the primary pathway is conserved in both dicot a...Dear Editor, The brassinosteroid （BR） signaling pathway has been well elucidated in Arabidopsis. The identification of BR-signaling components in rice suggested that the primary pathway is conserved in both dicot and monocot plants. However,展开更多
文摘Intrinsic carrier transport properties of single-walled carbon nanotubes have been probed by two parallel methods on the same individual tubes： The contactless dielectric force microscopy （DFM） technique and the conventional field-effect transistor （FET） method. The dielectric responses of SWNTs are strongly correlated with electronic transport of the corresponding FETs. The DC bias voltage in DFM plays a role analogous to the gate voltage in FET. A microscopic model based on the general continuity equation and numerical simulation is built to reveal the link between intrinsic properties such as carrier concentration and mobility and the macroscopic observable, i.e. dielectric responses, in DFM experiments. Local transport barriers in nanotubes, which influence the device transport behaviors, are also detected with nanometer scale resolution.
基金This work was supported by grants from the Ministry of Science and Technology of the People＇s Republic of China （2011CB100200） and the National Natural Science Foundation of China （31025004, 90817108）. No conflict of interest declared.
文摘Dear Editor, The brassinosteroid （BR） signaling pathway has been well elucidated in Arabidopsis. The identification of BR-signaling components in rice suggested that the primary pathway is conserved in both dicot and monocot plants. However,
