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날짜 2016-04-26 16:00 
일시 April 26 (Tue), 4PM 
장소 #1323(1st Floor. E6-2) 
연사 Dr. Myung-Ho Bae, Korea Research Institute of Standards and Science 

Transport spectroscopy for electronic bands in carbon-based nanomaterials with weak-bond contacts


April 26 (Tue), 4PM, #1323(1st Floor. E6-2)
Dr. Myung-Ho Bae, Korea Research Institute of Standards and Science

As a consequence of their unique electronic band structures, carbon-based nanomaterials (CNMs) such as carbon nanotubes and graphene exhibit intriguing quantum transports when incorporated into field-effect transistors (FETs) in which the contact resistance represents the coupling strength between the nanosystem and the bulk system.  Here, we report a new aspect of CNM quantum devices that offers transport spectroscopy in the tunnelling regime of ~1 eV and directly reflects the electronic density of states. This was accomplished using physisorption contacts with the CNMs. Our first-principles calculations reveal that charge transfer is rare between the physisorption-contacted electrodes and CNMs. Therefore, the physisorption-contacted electrode forms a physisorption interface with a considerable vacuum gap and causes little disruption to the density of states of the CNM near the contact.


Contact: Chan-Ho Yang, Physics Dept., (

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