Publications

84.   S. W. Han, W. S. Yun, S. Seong, Z. Tahir, Y. S. Kim, M. Ko, S. Ryu, J.-S. Bae, C. W. Ahn, and J. Kang,        "Hidden Direct Bandgap of Bi2O2Se by Se Vacancy and Enhanced Direct Bandgap of Bismuth Oxide Overlayer",        J. Phys. Chem. Lett. 15, 1590 (2024);  [Link] [PDF]
83.   W. Kim,+ G. Jeong,+ J. Oh, J. Kim, K. Watanabe, T. Taniguchi and S. Ryu,*        "Exciton-Sensitized Second-Harmonic Generation in 2D Heterostructures",        ACS Nano 17, 20580 (2023) (+equal authorship);  [Link] [PDF]
82.   B. S. Gu, S. Dutta, Y.-R. Hong, O. F. N. Okello, H. Im, S. Ahn, S.-Y. Choi, J. W. Han, S. Ryu and I. S. Lee,        "Harmonious Heterointerfaces Formed on 2D-Pt Nanodendrites by Facet-Respective Stepwise Metal Deposition for Enhanced Hydrogen Evolution Reaction",        Angew. Chem.-Int. Edit. 62, e202307816 (2023);  [Link] [PDF]
81.   H. Kim, J. H. Kim, J. Kim, J. Park, K. Park, J.-H. Baek, J.-C. Shin, H. Lee, J. Son, S. Ryu, Y.-W. Son, H. Cheong and G.-H. Lee,        "In-Plane Anisotropy of Graphene by Strong Interlayer Interactions with van der Waals Epitaxially Grown MoO3",        Sci. Adv. 9, eadg6696 (2023);  [Link] [PDF]
80.   D. Kim, S. Lee, J. Park, J. Lee, H. C. Choi, K. Kim and S. Ryu,*        "In-Plane and Out-of-Plane Excitonic Coupling in 2D Molecular Crystals",        Nature Commun. 14, 2736 (2023);  [Link] [PDF]
79.   Y. Kim,+ H. Kang,+ M. Song, H. Kwon and  S. Ryu,*        "Interfacial-Water-Modulated Photoluminescence of Single-Layer WS2 on Mica",        Int. J. Mol. Sci. 24, 3492 (2023) (+equal authorship);  [Link] [PDF]
78.   Y. Park, C. Ahn, J.-G. Ahn, J. H. Kim, J. Jung, J. Oh, S. Ryu, S. Kim, S. C. Kim, T. Kim and H. Lim,        "Critical Role of Surface Termination of Sapphire Substrates in Crystallographic Epitaxial Growth of MoS2 Using Inorganic Molecular Precursors",        ACS Nano 17, 1196 (2023);  [Link] [PDF]
77.   S. Kim,+ S. Yoon,+ H. Ahn, G. Jin, H. Kim, M.-H. Jo, C. Lee, J. Kim* and S. Ryu,*        "Photoluminescence Path Bifurcations by Spin Flip in Two-Dimensional CrPS4",        ACS Nano 16, 16385 (2022) (+equal authorship);  [Link] [PDF]
76.   H. Zhao* and S. Ryu,*        "Insights into 2D Materials",        Phys. Chem. Chem. Phys. 24, 16940 (2022);  [Link] [PDF]
75.   K. Y. Ma, L. Zhang, S. Jin, Y. Wang, S. I. Yoon, H. Hwang, J. Oh, D. S. Jeong, M. Wang, S. Chatterjee, G. Kim, A-R. Jang, J. Yang, S. Ryu, H. Y. Jeong, R. S. Ruoff, M. Chhowalla, F. Ding and H. S. Shin,        "Epitaxial Single-Crystal Hexagonal Boron Nitride Multilayers on Ni (111)",        Nature 606, 88 (2022);  [Link] [PDF]
74.   H. Kang,+ K. Park+ and S. Ryu,*         "Optical Imaging of Redox and Molecular Diffusion in 2D van der Waals Space",        Acc. Chem. Res. 55, 44 (2022) (+equal authorship);  [Link] [PDF]
73.   K. Park and S. Ryu,*         "Dual-Channel Charge Transfer Doping of Graphene by Sulfuric Acid",        Bull. Korean Chem. Soc. 43, 40 (2022);  [Link] [PDF]
72.   S. W. Han, W. S. Yun, H. Kim, Y. Kim, D.-H. Kim, C. W. Ahn and S. Ryu         "Hole Doping Effect of MoS2 via Electron Capture of He+ Ion Irradiation",        Sci. Rep. 11, 23590 (2021);  [Link] [PDF]
71.   S. J. Yang, D. Kim, J. Choi, S. H. Kim, K. Park, S. Ryu and K. Cho,        "Enhancing Thermoelectric Power Factor of 2D Organometal Halide Perovskites by Suppressing 2D/3D Phase Separation",        Adv. Mater. 33, 2102797 (2021);  [Link] [PDF]
70.   S. Song, S. J. Yang, J. Choi, S. G. Han, K. Park, H. Lee, J. Min, S. Ryu and K. Cho,        "Surface Stabilization of a Formamidinium Perovskite Solar Cell Using Quaternary Ammonium Salt",        ACS Appl. Mater. & Interfaces 13, 37052 (2021);  [Link] [PDF]
69.   H. Kang and S. Ryu,*        "Optical Imaging of Chemically and Geometrically Controlled Molecular Diffusion and Redox in 2D van der Waals Space",        J. Phys. Chem. C 125, 16819 (2021);  [Link] [PDF]
68.   S. Koo, I. Park, K. Watanabe, T. Taniguchi, J. Shim and S. Ryu,*       "Extraordinary Photostability and Davydov Splitting in BN-Sandwiched Single-Layer Tetracene Molecular Crystals",        Nano Lett. 21, 6600 (2021);  [Link] [PDF]
67.   S. Lee, S. Kim, C. Park, W. Kim, S. Ryu and W. Choi,       "Solar Denitrification Coupled with in situ Water Splitting",        Energy Environ. Sci. 14, 4437 (2021);  [Link] [PDF]
66.   N. Kim, S. Choi, S.-J. Yang, J. Park, J.-H. Park, N. N. Nguyen, K. Park, S. Ryu, K. Cho and C.-J. Kim,        "Graphene Nanoribbon Grids of Sub-10 nm Widths with High Electrical Connectivity",        ACS Appl. Mater. & Interfaces 13, 28593 (2021);  [Link] [PDF]
65.   M. Song, H. Kang, D. Rhodes, B. Kim, J. Hone and S. Ryu,*       "Optically Facet-Resolved Reaction Anisotropy in Two-Dimensional Transition Metal Dichalcogenides",        2D Materials 8, 035045 (2021);  [Link] [PDF
64.   J.-I. Lee, S. Cho, T. T. Vu, S. Kim, S. Ryu, J. Moon and S. Park       "Hybrid Polyion Complex Micelles Enabling High-Performance Lithium-Metal Batteries with Universal Carbonates",        Energy Storage Mater. 38, 509 (2021);  [Link] [PDF]
63.   S. Kim, J. Lee, C. Lee and S. Ryu,*       "Polarized Raman Spectra and Complex Raman Tensors of Antiferromagnetic Semiconductor CrPS4",        J. Phys. Chem. C 125, 2691 (2021);  [Link] [PDF]
62.   W. Kim, J. Y. Ahn, J. Oh, J. H. Shim and S. Ryu,*       "Second-Harmonic Young's Interference in Atom-Thin Heterocrystals",        Nano Lett. 20, 8825 (2020);  [Link] [PDF]
61.   S. W. Jang, S. Dutta, A. Kumar, Y.-R. Hong, H. Kang, S. Lee, S. Ryu, W. Choi, and I. S. Lee,       "Holey Pt Nanosheets on NiFe-Hydroxide Laminates: Synergistically Enhanced Electrocatalytic 2D Interface toward Hydrogen Evolution Reaction",        ACS Nano 14, 10578 (2020);  [Link] [PDF]
60.   J. Choi, S. Koo, M. Song, D. Jung, S. Choi  and S. Ryu,*       "Varying Electronic Coupling at Graphene-Copper Interfaces Probed with Raman Spectroscopy",        2D Materials 7, 025006 (2020);  [Link] [PDF]
59.   K. Park,+ H. Kang,+ S. Koo, D. Lee and S. Ryu,*       "Redox-Governed Charge Doping Dictated by Interfacial Diffusion in Two-Dimensional Materials",        Nature Commun. 10, 4931 (2019) (+equal authorship)[Link] [PDF]
58.   S. Kim, J. Lee, G. Jin, M.-H. Jo, C. Lee and S. Ryu,*       "Crossover between Photochemical and Photothermal Oxidations of Atomically Thin Magnetic Semiconductor CrPS4",        Nano Lett. 19, 4043 (2019);  [Link] [PDF] 57.   H. Jeon, T. Teraji, K. Watanabe, T. Taniguchi and S. Ryu,*       "Lattice Vibrations of Single and Multi-Layer Isotopologic Graphene",        Carbon 140, 449 (2018);  [Link] [PDF]
56.   Y. Kwon, K. Kim, W. Kim, S. Ryu and H. Cheong,       "Variation of Photoluminescence Spectral Line Shape of Monolayer WS2",        Curr. Appl. Phys. 18, 941 (2018);  [Link] [PDF]
55.   G. Ahn and S. Ryu,*       "Reversible Sulfuric Acid Doping of Graphene Probed by in-situ Multi-Wavelength Raman Spectroscopy",        Carbon 138, 257 (2018);  [Link] [PDF] 54.   S.-J. Kwon, T.-H. Han, T. Y. Ko, N. Li, S.-H. Bae, K. S. Kim, S. Ryu and T.-W. Lee,       "Extremely Stable Graphene Electrodes Doped with Macromolecular Acid",        Nature Commun. 9, 2037 (2018);  [Link] [PDF]
53.   Y. Jang, S.-J. Kwon, J. Shin, H. Jeong, W.-T. Hwang, J.-W. Kim, J. Koo, T. Y. Ko, S. Ryu, G. Wang, T.-W. Lee, and T. Lee,       "Interface-Engineered Charge Transport Properties in Benzenedithol Molecular Electronic Junctions via Chemically p-doped Graphene Electrodes",        ACS Appl. Mater. & Interfaces 9, 42043 (2017);  [Link] [PDF]
52.   Y. Ryu, W. Kim, S. Koo, H. Kang, K. Watanabe, T. Taniguchi, and S. Ryu,*       "Interface-Confined Doubly Anisotropic Oxidation of Two-Dimensional MoS2",        Nano Lett. 17, 7267 (2017);  [Link] [PDF]
51.   J. Lee, T. Y. Ko, J. H. Kim, H. Bark, B. Kang, S.-G. Jung, T. Park, Z. Lee, S. Ryu,* and C. Lee,*       "Structural and Optical Properties of Single- and Few-Layer Magnetic Semiconductor CrPS4",        ACS Nano 11, 10935 (2017);  [Link] [PDF]
50.   D.-G. Lee, H. Jeong, K.-W. Jeon, L. Zhang, K. Park, S. Ryu, J. Kim, and I. S. Lee,       "Carbon thin-layer-coated manganese oxide nanocrystals as an effective support for high-performance Pt electrocatalysts stabilized at a metal–metal oxide–carbon triple junction",        J. Mater. Chem. A 5, 22341 (2017);  [Link] [PDF]
49.   D. Luo, X. You, B.-W. Li, X. Chen, H. J. Park, M. Jang, T. Y. Ko, K. Wong, M. Yousaf, X. Chen, M. Huang, S. H. Lee,  Z. Lee, H.-J. Shin, S. Ryu, S. K. Kwak, N. Park, R. R. Bacsa, W. Bacsa, R. S. Ruoff,       "Role of Graphene in Water-Assisted Oxidation of Copper in Relation to Dry Transfer of Graphene",        Chem. Mater. 29, 4546 (2017);  [Link] [PDF]
48.   P. K. Nayak, Y. Horbatenko, S. Ahn, G. Kim, J.-U. Lee, K. Y. Ma, A-R. Jang, H. Lim, D. Kim, S. Ryu, H. Cheong, N. Park, and H. S. Shin,       "Probing Evolution of Twist-Angle-Dependent Interlayer Excitons in MoSe2/WSe2 van der Waals Heterostructures",        ACS Nano 11, 4041 (2017);  [Link] [PDF]
47.   J. E. Lee, J. Jung, T. Y. Ko, S. Kim, S.-I. Kim, J. Nah, S. Ryu, K. T. Nam and M. H. Lee,       "Catalytic synergy effect of MoS2/reduced graphene oxide hybrids for a highly efficient hydrogen evolution reaction",        RSC Adv. 7, 5480 (2017);  [Link] [PDF] 
46.   T. Y. Ko, A. Jeong, W. Kim, J. Lee, Y. Kim, J. E. Lee, G. H. Ryu, K. Park, D. Kim, Z. Lee, M. H. Lee, C. Lee and S. Ryu,*       "On-Stack Two-Dimensional Conversion of MoS2 into MoO3",        2D Materials 4, 014003 (2017);  [Link] [PDF]
45.   X. Zhang, Y. Huang, S. Chen, N. Y. Kim, W. Kim, D. Schilter, M. Biswal, B. Li, Z. Lee, S. Ryu, C. W. Bielawski, W. S. Bacsa, and R. S. Ruoff,       "Birch-Type Hydrogenation of Few-Layer Graphenes: Products and Mechanistic Implications",        J. Am. Chem. Soc. 138, 14980 (2016);  [Link] [PDF]
44.   H. Kwon, S. W. Seo, T. G. Kim, E. S. Lee, P. T. Lanh, S. Yang, S. Ryu,* J. W. Kim,*       "Ultrathin and Flat Layer Black Phosphorus Fabricated by Reactive Oxygen and Water Rinse",        ACS Nano 10, 8723 (2016);  [Link] [PDF]
43.   S. Kim and S. Ryu,*       "Thickness-Dependent Native Strain in Graphene Membranes Visualized by Raman Spectroscopy ",        Carbon 100, 283 (2016);  [Link] [PDF]
42.   S.-S. Kim, M. J. Park, J.-H. Kim, G. Ahn, S. Ryu, B. H. Hong, and B.-H. Sohn,       "Strain-Assisted Wafer-Scale Nanoperforation of Single-Layer Graphene by Arrayed Pt Nanoparticles",        Chem. Mater. 27, 7003 (2015);  [Link] [PDF]
41.   D.-S. Kim, H. Kwon, A. Y. Nikitin, S. Ahn, L. Martín-Moreno, F. J. García-Vidal, S. Ryu, H. Min, and Z. H. Kim,       "Stacking Structures of Few-Layer Graphene Revealed by Phase-Sensitive Infrared Nanoscopy",        ACS Nano 9, 6765 (2015);  [Link] [PDF]
40.    K. Park and S. Ryu,*        "Direction-Controlled Chemical Doping for Reversible G-Phonon Mixing in ABC Trilayer",        Sci. Rep. 5, 8707 (2015);  [Link] [PDF]
39.    Y.-J. Yu, K. S. Kim, J. Nam, S. R. Kwon, H. Byun, K. Lee, J.-H. Ryou, R. D. Dupuis, J. Kim, G. Ahn, S. Ryu, M.-Y. Ryu and J. S. Kim,        "Temperature-Dependent Resonance Energy Transfer from Semiconductor Quantum Wells to Graphene",        Nano Lett. 15, 896 (2015);  [Link] [PDF]
38.    P. Joo, K. Jo, G. Ahn, D. Voiry, H. Y. Jeong, S. Ryu, M. Chhowalla, and B.-S. Kim,*        "Functional Polyelectrolyte Nanospaced MoS2 Multilayers for Enhanced Photoluminescence",        Nano Lett. 14, 6456 (2014);  [Link] [PDF]
37.    Y. Ryu, M. K. Park, and S. Ryu,*        "Thermal Modulation of Photoluminescence from Single-Layer MoS2",        Bull. Korean Chem. Soc. 35, 3077 (2014);  [Link] [PDF]
36.    G. Park, S. K. Park, J. Han, T. Y. Ko, S. Lee, J. Oh, S. Ryu, H. S. Park and S. Park,        "Finely Tuning Oxygen Functional Groups of Graphene Materials and Optimizing Oxygen Levels for Capacitors ",        RSC Adv. 4, 36377 (2014);  [Link] [PDF]
35.    D. Lee, G. Ahn and S. Ryu,*        "Two-Dimensional Water Diffusion at a Graphene-Silica Interface",        J. Am. Chem. Soc. 136, 6634 (2014);  [Link] [PDF]
34.    Y. Kim, D. Cho, S. Ryu and C. Lee,        "Tuning Doping and Strain in Graphene by Microwave-Induced Annealing",        Carbon 67, 673 (2014);  [Link] [PDF]
33.    J. Hong, M. K. Park, E. J. Lee, D. Lee, D. S. Hwang and S. Ryu,*        "Origin of New Broad Raman D and G Peaks in Annealed Graphene",        Sci. Rep. 3, 2700 (2013);  [Link] [PDF]
32.    S. W. Han, Y. H. Hwang, S.-H. Kim, W. S. Yun, J. D. Lee, M. G. Park, S. Ryu, J. S. Park, D.-H. Yoo, S.-P. Yoon, S. C. Hong, K. S. Kim, and Y. S. Park,        "Controlling Ferromagnetic Easy Axis in a Layered MoS2 Single Crystal",        Phys. Rev. Lett. 110, 247201 (2013);  [Link] [PDF]
31.    G. Ahn , H. R. Kim , T. Y. Ko , K. Choi , K. Watanabe , T. Taniguchi , B. H. Hong , and S. Ryu,*        "Optical Probing of the Electronic Interaction between Graphene and Hexagonal Boron Nitride",        ACS Nano 7, 1533 (2013);  [Link] [PDF]
30.    S.-W. Min, H. S. Lee, H. J. Choi, M. K. Park, T. Nam, H. Kim, S. Ryu and S. Im,        "Nanosheet Thickness-Modulated MoS2 Dielectric Property Evidenced by Field-Effect Transistor Performance",        Nanoscale 5, 548 (2013);  [Link] [PDF]
29.    M. J. Lee, J. S. Choi, J.-S. Kim, I.-S. Byun, D. H. Lee, S. Ryu, C. Lee, and B. H. Park,        "Characteristics and Effects of Diffused Water Between Graphene and a SiO2 Substrate",        Nano Res. 5, 710 (2012);  [Link] [PDF]
28.    H. S. Lee, S.-W. Min, M. K. Park, Y. T. Lee, P. J. Jeon, J. H. Kim, S. Ryu and S. Im,        " MoS2 Nanosheets for Top-Gate Nonvolatile Memory Transistor Channel",        Small 8, 3111 (2012);  [Link] [PDF]
27.    S. W. Han, G.-B. Cha, E. Frantzeskakis, I. Razado-Colambo, J. Avila, Y. S. Park, D. Kim, J. Hwang, J. S. Kang, S. Ryu, W. S. Yun, S. C. Hong, and M. C. Asensio,        "Band-Gap Expansion in the Surface-Localized Electronic Structure of MoS2(0002)",        Phys. Rev. B 86, 115105 (2012);  [Link] [PDF]
26.    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);  [Link] [PDF]
25.    H. S. Lee, S. Min, Y. Chang, M. K. Park, T. Nam, H. Kim, J. H. Kim, S. Ryu, and S. Im,        “MoS2 Nanosheet Phototransistors with Thickness-Modulated Optical Energy Gap”,        Nano Lett. 12, 3695 (2012);  [Link] [PDF]
24.    G. Ahn, H. R. Kim, B. H. Hong, and S. Ryu,*         “Raman Spectroscopy Study on the Reactions of UV-Generated Oxygen Atoms with Single-Layer Graphene on SiO­2/Si Substrates”,        Carbon Lett. 13, 34 (2012);  [Link] [PDF]
23.    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);  [Link] [PDF]
22.    H. Kwon, K. Hwang, J. Park, S. Ryu, and S. K. Kim,          “Electron Solvation and Solvation-Induced Crystallization of an Ammonia Film on Ag(111) Studied by 2-Photon Photoemission”,         Phys. Chem. Chem. Phys. 13, 17785 (2011);  [Link] [PDF]
21.    S. W. Han, H. Kwon, S. K. Kim, S. Ryu, W. S. Yun, D. H. Kim, J. H. Hwang, J.-S. Kang, J. Baik, H. J. Shin, and S. C. Hong,          “Band-Gap Transition Induced by Interlayer van der Waals Interaction in MoS2”,         Phys. Rev. B 84, 045409 (2011);  [Link] [PDF]
20.    S. Ryu,* J. Maultzsch, M. Y. Han, P. Kim, and L. E. Brus,         “Raman Spectroscopy of Lithographically Patterned Graphene Nanoribbons”,         ACS Nano 5, 4123 (2011);  [Link] [PDF]
19.    S. Ryu, Li Liu, S. Berciaud, Y.-J. Yu, H. Liu, P. Kim, G. W. Flynn, and L. E. Brus,         “Atmospheric Oxygen Binding and Hole Doping in Deformed Graphene on a SiO2 Substrate”,         Nano Lett. 10, 4944 (2010);  [Link] [PDF]
18.    J. Song, T. Y. Ko, and S. Ryu,*         “Raman Spectroscopy Study of Annealing-Induced Effects on Graphene Prepared by Micromechanical Exfoliation”,         Bull. Korean Chem. Soc. 31, 2679 (2010);  [Link] [PDF]
17.    C. Lee, H. Yan, L. E. Brus, T. F. Heinz, J. Hone, and S. Ryu,*         “Anomalous Lattice Vibrations of Single- and Few-Layer MoS2”,         ACS Nano 4, 2695 (2010);  [Link] [PDF]
16.    S. Vukelic, P. Kongsuwan, S. Ryu and Y. L. Yao,        "Ultrafast Laser Induced Structural Modification of Fused Silica—Part II: Spatially Resolved and Decomposed Raman Spectral Analysis",        J. Manuf. Sci. E. 132, 061013 (2010);  [Link] [PDF]
15.    H. Liu, S. Ryu, Z. Chen, M. L. Steigerwald, C. Nuckolls, and L. E. Brus,         “Photochemical Reactivity of Graphene”,         J. Am. Chem. Soc. 131, 17099 (2009);  [Link] [PDF]
14.    Y.-J. Yu, Y. Zhao, S. Ryu, L. E. Brus, K. S. Kim, and P. Kim,         “Tuning the Graphene Work Function by Electric Field Effect”,         Nano Lett. 9, 3430 (2009);  [Link] [PDF]
13.    E. Stolyarova, D. Stolyarov, K. Bolotin, S. Ryu, L. Liu, K. T. Rim, M. Klima, M.Hybertsen,         I. Pogorelsky, I. Pavlishin, K. Kusche, J. Hone, P. Kim, H. L. Stormer, V. Yakimenko, and G. Flynn,         “Observation of Graphene Bubbles and Effective Mass Transport under Graphene Films”,         Nano Lett. 9, 332 (2009);  [Link] [PDF]
12.    S. Berciaud, S. Ryu, L. E. Brus, and T. F. Heinz,         “Probing the Intrinsic Properties of Exfoliated Graphene: Raman Spectroscopy of Free-Standing Monolayers”,         Nano Lett. 9, 346 (2009);   [Link] [PDF]
11.    S. Ryu, M. Y. Han, J. Maultzsch, M. L. Steigerwald, T. F. Heinz, P. Kim, and L. E. Brus,         “Reversible Basal Plane Hydrogenation of Graphene”,         Nano Lett. 8, 4597 (2008);  [Link] [PDF]
10.    L. Liu,+ S. Ryu,+ M. R. Tomasik, E. Stolyarova, N. J. Jung, M. S. Hybertsen, M. L. Steigerwald, L. E. Brus, and G. W. Flynn,        “Graphene Oxidation: Thickness Dependent Etching and Strong Chemical Doping”,         Nano Lett. 8, 1965 (2008) (+equal authorship);  [Link] [PDF]
9.     J. S. Lee, S. Ryu, K. Yoo, J. Kim , I. S. Choi, and W. S. Yun,         “Local Inhomogeneity in Gate Hysteresis of Carbon Nanotube Field-effect Transistors Investigated by Scanning Gate Microscopy”,        Ultramicroscopy 108, 1045 (2008);  [Link] [PDF] 
8.     J. S. Lee, S. Ryu, K. Yoo, I. S. Choi, W. S. Yun, and J. Kim,         “Origin of Gate Hysteresis in Carbon Nanotube Field-Effect Transistors”,         J. Phys. Chem. C 111, 12504 (2007);  [Link] [PDF]
7.     E. Stolyarova, K. T. Rim, S. Ryu, J. Maultzsch, P. Kim, L. E. Brus, T. F. Heinz, M. S. Hybertsen, and G. W. Flynn,       “High-resolution Scanning Tunneling Microscopy Imaging of Mesoscopic Graphene Sheets on an Insulating Surface”,        Proc. Natl. Acad. Sci. USA 104, 9209 (2007);  [Link] [PDF]
6.     S. Ryu, J. Chang, and S. K. Kim,         “Hot Electrons at Metal-organic interface: Time-resolved Two Photon Photoemission Study of Phenol on Ag(111)”,         J. Vac. Sci. Technol. A 24, 1454 (2006);  [Link] [PDF]
5.     S. Ryu, J. Chang, H. Kwon, and S. K. Kim,        “Dynamics of Solvated Electron Transfer in Thin Ice Film Leading to a Large Enhancement in Photodissociation of CFCl3”,         J. Am. Chem. Soc. 128, 3500 (2006);  [Link] [PDF]
4.     S. Ryu, J. Chang, and S. K. Kim,         “Interfacial Electron Dynamics and Hot-electron-driven Surface Photochemistry of Carbon Tetrachloride on Ag(111)”,         J. Chem. Phys. 123, 114710 (2005);  [Link] [PDF]
3.     J. Lee,+ S. Ryu,+ J. Chang, S. Kim, and S. K. Kim,         “Direct Observation of an Intermediate State for a Surface Photochemical Reaction Initiated by Hot Electron Transfer”,         J. Phys. Chem. B 109, 14481 (2005) (+equal authorship);  [Link] [PDF]
2.     J. Lee, S. Ryu, J. S. Ku, and S. K. Kim,         “Charge Transfer Photodissociation of Phenol on Ag(111)”,         J. Chem. Phys. 115, 10518 (2001);  [Link] [PDF]
1.     J. Lee, S. Ryu, and S. K. Kim,         “The Adsorption and Photochemistry of Phenol on Ag(111)”,         Surf. Sci. 481, 163 (2001);  [Link] [PDF]