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Title : Mechanical and physical properties of atomic sheets


Speaker  :  이창구 교수(Sungkyunkwan University, Mechanical Engineering)


Date & Time : 10.15 (Fri) 11:00


Place : 응용공학동 신소재공학과 제 2세미나실


 


Mechanical and physical properties of atomic sheets


 


Recently discovered atomically thin sheets, such as graphene, has shown outstanding properties that differ from their bulk counterparts and is expected to lead to numerous applications in electronics, energy, chemistry, and mechanics. So far, the majority of the research effort has been focused on graphene and its electronic and optical properties and applications.


In contrast, their mechanical properties have barely been explored although they are equally interesting and are envisioned to have great impacts on materials design. Also other atomically thin layered materials such as MoS2 and BN have not studied as thoroughly.


In this talk, I am going to present mechanical, tribological, fluidic, optical and electrical properties of atomically thin sheets of graphene, MoS2, BN, and NbSe2. Using AFM techniques, graphene and MoS2’s mechanical properties have been measured, and graphene has shown extraordinary stiffness and fracture strength. Single-asperity contact friction measurement revealed increased friction on atomically thin sheets than their bulk materials due to “puckering effect”. I have also discovered that liquid flow over graphene generates electric potential due to charge drag effect. MoS2, when the thickness decreases down to single layer, changes from indirect to direct bangap material due to quantum confinement.


 


 


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
» 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
44 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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