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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 Seminar안내-Dr.Changsoon Kim(Duke Univ.), 08.9.29 file 2008.11.07
40 Seminar안내-Prof. Yoshio Bando(NIMS), 08.8.26 2008.11.07
39 Seminar안내-김필립박사(Columbia Univ.), 08.12.10(수) 15시 2008.11.26
38 Seminar안내-박지용 박사 (아주대), 09.04.2 2009.03.23
37 Seminar안내-이호성박사(KOSEF), 08.6.26 2008.11.07
36 Seminar안내-진병두박사(KIST), 08.4.7 2008.11.07
35 Won Jun Jo (Massachusetts Institute of Technology) file 2016.11.07
34 [EEWS-KINC Special Seminar] Prof. Singho JIN (Materials Program, UCSD) file 2013.07.09
33 [Invited Seminar] Prof. Nicholas A. Kotov (University of Michigan) file 2011.08.16
32 [KINC Invite Seminar] Prof. Young-Jun Yu (Dept. of Physics, Columbia Univ.) 2011.09.23
31 [KINC Invited Seminar] Dr. Enrico Benassi(Nanoscience Institute S3 / Physics Dep.) file 2012.06.14
30 [KINC Invited Seminar] Patrick Stayton & Allan S. Hoffman(Univ. of Washington) file 2011.01.14
29 [KINC Invited Seminar] Prof. Ali Shakouri(Purdue University, Director of the Birck Nanotechnology Center) 2014.02.07
28 [KINC Invited Seminar] Prof. Byounghak Lee(Dept. of Physics, Texas State University) file 2013.06.14
27 [KINC Invited Seminar] Prof. Coskun Kocabas (Bilkent Univ.) file 2013.08.06
26 [KINC Invited Seminar] Prof. MinJun Kim, Drexel University file 2014.06.23
25 [KINC Invited Seminar] Prof. RAJARSHI BANERJEE(University of North Texas) 2011.09.05
24 [KINC Invited Seminar] Prof. Rodney S. Ruoff(Director, Center for Multidimensional Carbon Materials (CMCM)) file 2014.02.07
23 [KINC Invited Seminar] Prof. Suck Won Hong (Pusan National Univ.) file 2011.03.21
22 [KINC Invited Seminar] Prof. Yongfang Li(Institute of Chemistry) file 2012.05.17
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