NEWS   For NanoCentury

Seminar

KAIST Institute 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
101 오스트리아-한국 나노기술 국제협력을 위한 공동 세미나 개최 file 2019.06.22
100 2019 KINC 미세먼지 Lecture Series (제 3회) file 2019.05.15
99 2019 KINC 미세먼지 Lecture Series (제 2회) file 2019.05.08
98 2019 KINC 미세먼지 Lecture Series (제 1회) file 2019.04.30
97 Prof. Nanshu Lu (University of Texas at Austin) file 2019.03.12
96 Prof. Jianxin Geng, Beijing University of Chemical Technology file 2018.10.01
95 Invited Special Seminar (Prof. Shlomo Magdassi) file 2018.09.05
94 2018 Asian-Nano Symposium on Macromolecules file 2018.03.26
93 [제 3회 KINC 특별 초청 강연 안내]2017.10.23(월) 16시 이조원 한미 나노포럼 조직위원장 file 2017.10.16
92 한미 나노기술 공동연구센터 협력 세미나 /김문재 교수, UT Dallas file 2017.07.07
91 Prof. Timothy P. Lodge, University of Minnesota file 2017.06.26
90 Prof. Jongseung Yoon (University of Southern California) file 2017.06.22
89 Prof. Nicholas A. Kotov (University of Michigan) file 2017.06.22
88 Dr. Won Jun Jo (M.I.T) file 2017.04.28
87 Prof. Andrey L. Rogach / Dr. Stephen V. Kershaw (City University of Hong Kong) file 2016.11.07
86 Prof. Gadi Eisenstein (Director Russell Berrie Nanotechnology Institute) file 2016.11.07
85 KAIST Self-Assembly Symposium 2016 file 2016.11.07
84 Prof. Nicholas A. Kotov (University of Michigan) file 2016.11.07
83 Lerwen LIU, PhD (Managing Director of NanoGlobe Pte Ltd) file 2016.11.07
82 Won Jun Jo (Massachusetts Institute of Technology) file 2016.11.07
Board Pagination Prev 1 2 3 4 5 6 Next
/ 6