Loading...
2017.11.27 10:25

[Thu. 30 Nov. 2017] Prof. Sunmin Ryu/Department of Chemistry, POSTECH, Pohang, South Korea

?

Shortcut

PrevPrev Article

NextNext Article

+ - Up Down Comment Print
?

Shortcut

PrevPrev Article

NextNext Article

+ - Up Down Comment Print
Extra Form
Speaker Prof. Sunmin Ryu
Date Thu. 30 Nov. 2017
Time 5:00pm
Venue #331, Asan Hall, College of Science

Surface Science of 2-Dimensional Crystals Probed by Optical Spectroscopy

 

Two-dimensional crystals (2DX) represented by graphene hold substantial potentials both in fundamental research and industrial applications owing to novel electronic and optical properties enabled by dimensional confinement. In addition, their intrinsic properties are readily manipulated by chemical entities in direct contact because of their high fraction of surface atoms. To uncover and control emerging properties, my group has explored surface and interfacial science of low dimensional materials and developed optimized spectroscopic methods. In particular, Raman spectroscopy has proven to be a versatile analytical probe because of the varying spectral features for different thickness, stacking, defect density, charge density, mechanical strain, temperature, etc. Such multimodal sensitivity, however, turns into difficulty when multiple unknown variables are to be determined simultaneously. In this talk, I will explain that the effects of strain and charges in graphene can be optically separated from each other by correlation analysis of the two modes, enabling simple quantification of both. Employing the analysis, I will present our recent findings on important surface scientific problems in 2-dimension such as structural deformation caused by substrates and thermal perturbation, interfacial charge transfer, and molecular diffusion through 2DX-substrate interface.

 

References

1.      J. E. Lee, G. Ahn, J. Shim, Y. S. Lee, and S. Ryu,* “Optical Separation of Mechanical Strain from Charge Doping in Graphene”, Nature Commun. 3, 1024 (2012) 

2.      J. Shim, C. H. Lui, T. Y. Ko, Y.-J. Yu, P. Kim, T. F. Heinz, and S. Ryu,* “Water-Gated Charge Doping of Graphene Induced by Mica Substrates”, Nano Lett. 12, 648 (2012) 

3.      D. Lee, G. Ahn and S. Ryu,* “Two-Dimensional Water Diffusion at a Graphene-Silica Interface”, J. Am. Chem. Soc. 136, 6634 (2014) 

 

 

 


List of Articles
No. Subject Speaker Date
Notice Spring semester 2019 Seminar Schedule file - -
58 [April 4. 2019] Rational Design of Solid-State Materials with Asymmetric Coordination Environment Prof. Kang Min Ok (Sogang University) Thu. 4 Apr. 2019
57 [March 28. 2019] NMR Structural Studies of engineered novel antimicrobial peptides Prof. Yongae Kim (Hankuk University of Foreign Studies) Thu. 28 Mar. 2019
56 [March 21, 2019] Nanomaterials Design for Energy Conversion and Storage Prof. Jong-Hyuk Park (Yonsei University) Thu. 21 Mar. 2019
55 [March 27, 2019] Hyperpolarization Researches with NV center, 129Xe and Parahydrogen file Prof. Keunhong Jeong March 27, 2019
54 [March 20, 2019] Challenges in molecular dynamics simulations of unfolded proteins and protein-DNA complexes file Dr. Jejoong Yoo March 20, 2019
53 [March 5. 2019] Innovation@Agilent file Dr. Darlene Solomon (Agilent Technologies Inc.) Tuesday. 5 March. 2019
52 [March 5. 2019] Prof. Michael J. Sailor/Treatment of S. aureus Bacterial Infections with Porous Silicon Nanoparticles Prof. Michael J. Sailor (UC San Diego) Tuesday. 5 March. 2019
51 [Thu. 6 Dec. 2018] Prof. Dong-Ho Kim/Department of Chemistry, Yonsei University, Seoul, Korea Prof. Dong-Ho Kim (Yonsei University) Thu. 6 Dec. 2018
50 Fall semester 2018 Seminar Schedule file - -
49 [January 24, 2018] Electro-Optic Organic THz Wave Sources file Prof. O-Pil Kwon(Ajou University) January 24, 2018 (Wednesday)
» [Thu. 30 Nov. 2017] Prof. Sunmin Ryu/Department of Chemistry, POSTECH, Pohang, South Korea Prof. Sunmin Ryu Thu. 30 Nov. 2017
47 [Thu. 23 Nov. 2017] Prof. Sung-Gon Kim/Department of Chemistry, Kyonggi University, Suwon, Korea Prof. Sung-Gon Kim Thu. 23 Nov. 2017
46 [November 14, 2017] Zero-Point Energy, Fluctuations, and Dissipation : A (Mostly) Quantum-Optical Perspective Prof. Milonni, Peter November 14, 2017
45 [Thu. 16 Nov. 2017] Prof. Hyungjun Kim/Department of Chemistry, and Graduate school of Energy, Environment, Water, and Sustainability (EEWS), KAIST, Daejeon, Korea Prof. Hyungjun Kim Thu. 16 Nov. 2017
44 [Fri. 30 Oct. 2017] Prof. Igor Rodin/Department of Chemistry, Moscow State University, Moscow, Russia Prof. Igor Rodin Fri. 30 Oct. 201
43 [October 31, 2017] New ways of vision: Protein structures in translational medicine and business development, my experience file Prof. Robert Huber(1988 Nobel Prize in Chemistry) October 31, 2017
42 [Thu. 26 Oct. 2017] Dr. Jung-Nyoung Heo/Center for Medicinal Chemistry Research, Korea Research Institute of Chemical Technology, Daejeon, Korea Dr. Jung-Nyoung Heo Thu. 26 Oct. 2017
41 [October 25, 2017] Ultrafast electron microscopy: applications in chemical and materials sciences Dr. Byung-Kuk Yoo October 25, 2017
40 [Mon. 16 Oct. 2017] Prof. Kirk S. Schanze/Department of Chemistry, University of Texas at San Antonio, Texas, USA Prof. Kirk S. Schanze Mon. 16 Oct. 2017
Board Pagination ‹ Prev 1 2 3 Next ›
/ 3

Designed by sketchbooks.co.kr / sketchbook5 board skin

나눔글꼴 설치 안내


이 PC에는 나눔글꼴이 설치되어 있지 않습니다.

이 사이트를 나눔글꼴로 보기 위해서는
나눔글꼴을 설치해야 합니다.

설치 Cancel

Sketchbook5, 스케치북5

Sketchbook5, 스케치북5

Sketchbook5, 스케치북5

Sketchbook5, 스케치북5

Department of Chemistry, Korea University, Tel) +82-2-3290-3120
145 Anam-ro Seongbuk-gu Seoul, 02841, Republic of Korea
Copyright(c) 2014 KOREA UNIVERSITY DEPARTMENT of CHEMISTRY. All right reserved.