NEWS   For NanoCentury



  • >
  •    NEWS   
  • >
  • Seminar
Extra Form
◎ 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 Seminar 안내-Mamadou S. Diallo, Ph.D., 09.6.3 2009.05.25
40 Seminar 안내-H. Grabert (FRIAS) & J. G. Korvink (FRIAS & IMTEK), 09.5.25 2009.05.18
39 Seminar 안내 - 전석우박사, Intellecture Ventures 2008.01.21
38 Prof. Timothy P. Lodge, University of Minnesota file 2017.06.26
37 Prof. Nicholas A. Kotov (University of Michigan) file 2016.11.07
36 Prof. Nicholas A. Kotov (University of Michigan) file 2017.06.22
35 Prof. Nanshu Lu (University of Texas at Austin) file 2019.03.12
34 Prof. Mark Hersam, Northwestern 2014.08.12
33 Prof. Jongseung Yoon (University of Southern California) file 2017.06.22
32 Prof. Jianxin Geng, Beijing University of Chemical Technology file 2018.10.01
31 Prof. Gadi Eisenstein (Director Russell Berrie Nanotechnology Institute) file 2016.11.07
30 Prof. Andrey L. Rogach / Dr. Stephen V. Kershaw (City University of Hong Kong) file 2016.11.07
29 Lerwen LIU, PhD (Managing Director of NanoGlobe Pte Ltd) file 2016.11.07
28 KI정기세미나 안내-조용훈,전석우,김범준교수 (08.11.11, 16:00~) file 2008.11.07
27 KINC 그래핀 워크샵 (10월 1일(금) 13:00) file 2010.09.14
26 KINC Seminar: 이창구 박사 (Sungkyunkan Univ., Mechanical Eng.) file 2010.10.07
» KINC Seminar: 유영준 박사 (Department of Physics, Columbia University, New York) file 2010.07.26
24 KINC Seminar: Prof. Younan Xia (Washington Univ. at St. Louis) 2009.11.26
23 KINC Seminar: Prof. Sunmin Ryu (Kyung Hee Univ.) file 2010.06.08
22 KINC Seminar: Prof. Ryan C. Hayward (Univ. of Massachusetts, Amherst) 2010.05.17
Board Pagination Prev 1 2 3 4 5 6 Next
/ 6