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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
61 [KINC Invited Seminar] Prof. Yongfang Li(Institute of Chemistry) file 2012.05.17
60 [KINC Invited Seminar] 이건도 연구교수(서울대 재료공학부) file 2012.05.07
59 [KINC Invited Seminar] 김종복 박사(Princeton University) file 2012.04.25
58 [KINC Invite Seminar] Prof. Young-Jun Yu (Dept. of Physics, Columbia Univ.) 2011.09.23
57 [KI목요세미나] 정희태 교수(KAIST, 생명화학공학과) file 2011.09.15
56 [KINC Invited Seminar] Prof. RAJARSHI BANERJEE(University of North Texas) 2011.09.05
55 [Invited Seminar] Prof. Nicholas A. Kotov (University of Michigan) file 2011.08.16
54 EEWS-MIRC-KINC Special Seminar file 2011.08.16
53 [KINC Invited Seminar] 이민백 박사 (Georgia Institute of Technology) 2011.06.08
52 [KINC Invited Seminar] Shu Yang (Dept. of MSE, Univ. of Pennsylvania) file 2011.05.30
51 KINC Invited Seminar] 이관형 박사 (Columbia University) file 2011.04.25
50 [KINC Invited Seminar] Prof. Suck Won Hong (Pusan National Univ.) file 2011.03.21
49 [KI목요세미나] 김봉수 교수(KAIST 화학과) file 2011.03.14
48 [KINC Invited Seminar] Patrick Stayton & Allan S. Hoffman(Univ. of Washington) file 2011.01.14
47 KI Thursday Seminar- 11/11 file 2010.10.25
46 KINC Seminar: 이창구 박사 (Sungkyunkan Univ., Mechanical Eng.) file 2010.10.07
45 KINC 그래핀 워크샵 (10월 1일(금) 13:00) file 2010.09.14
» KINC Seminar: 유영준 박사 (Department of Physics, Columbia University, New York) file 2010.07.26
43 KINC Seminar: Prof. Sunmin Ryu (Kyung Hee Univ.) file 2010.06.08
42 KINC Seminar: Dr. Woo Soo Kim (Xerox Research Center of Canada) 2010.05.17
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