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◎ Title : Spatially resolved electric and thermal properties study of graphene field effect devices
◎ Speaker : Young-Jun Yu (Department of Physics, Columbia University, New York)
◎ Date & Time : 8. 6(Fri) 16:00
◎ Place : 응용공학동 신소재공학과 제 2세미나실

◎ Abstract :
Spatially resolved electric and thermal properties study of graphene field effect devices

We present spatially resolved surface potential and thermal distribution of graphene field effect devices probed by scanning Kelvin probe microscopy (SKPM) and scanning thermal microscopy (SThM).
In SKPM study, we measured the surface potential variation of mono and bi-layer graphene devices. Using the electric field effect, the work function of graphene can be adjusted as the gate voltage tunes the Fermi level across the charge neutrality point. Upon biasing the device, the surface potential map obtained by SKPM provides a reliable way to measure the contact resistance of individual electrodes contacting graphene.
In order to understand the energy dissipation in graphene devices, including graphene nanoribbons (GNRs), we have studied temperature distribution of self-heated GNRs with SThM within 100 nm spatial resolutions. The temperature distributions measured in GNRs are attributed to joule heating variation in the channel due to the locally enhanced scattering which forms hot spot formation. From these SThM map in the devices, the junction thermal resistance between GNR and SiO2 substrate were estimated

List of Articles
번호 제목 날짜
41 [KINC Invited Seminar] Prof. Yongfang Li(Institute of Chemistry) file 2012.05.17
40 [KINC Invited Seminar] 이재광 박사 (Vanderbilt University) file 2012.06.07
39 [KINC Invited Seminar] Dr. Enrico Benassi(Nanoscience Institute S3 / Physics Dep.) file 2012.06.14
38 [KINC Invited Seminar] Prof. Byounghak Lee(Dept. of Physics, Texas State University) file 2013.06.14
37 [EEWS-KINC Special Seminar] Prof. Singho JIN (Materials Program, UCSD) file 2013.07.09
36 [KINC Invited Seminar] Prof. Coskun Kocabas (Bilkent Univ.) file 2013.08.06
35 [KINC Invited Seminar] 김명길 박사(Stanford University) file 2013.08.19
34 [KINC Invited Seminar] 홍영기 박사(University of Michigan) 2013.12.27
33 [KINC Invited Seminar] 박 철 박사( National Institute of Aerospace (NIA)) file 2013.12.27
32 [KINC Invited Seminar] Prof. Rodney S. Ruoff(Director, Center for Multidimensional Carbon Materials (CMCM)) file 2014.02.07
31 [KINC Invited Seminar] Prof. Ali Shakouri(Purdue University, Director of the Birck Nanotechnology Center) 2014.02.07
30 [Special Invited Seminar] Status and Prospect on Development of Nanomaterials for Supercapacitor file 2014.02.13
29 [Special Invited Seminar] Prof. Paras N. Prasad (State University of New York at Buffalo) file 2014.02.17
28 Emerging Biomaterials 2014 2014.06.23
27 [KINC Invited Seminar] Prof. MinJun Kim, Drexel University file 2014.06.23
26 Prof. Mark Hersam, Northwestern 2014.08.12
25 [KINC 초청세미나 안내]2014.10.13 11시, 엄태식 박사(University of Washington) 2014.10.13
24 [KINC 초청 세미나 안내] 2015.1.21(수) 16시, 윤종승 교수(Southern California 대학) file 2015.01.12
23 [KINC 초청세미나 안내] 2015.02.02(월)16:00, 이재광 박사(Oak Ridge National Laboratory) file 2015.02.04
22 [KINC 초청 세미나 안내]2015.10.29 16:00 조지아텍 Zhiqun Lin 교수 file 2015.10.27
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