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  •    Professor
  • Surface Chemistry and Physical Chemistry
  • Ph. D. 1999, Seoul National University
  • WEBPAGE : http://scale.kaist.ac.kr
  • E-MAIL : jeongypark@kaist.ac.kr
  • Tel/Office : 042-350-1713 (Office), 1773 (Lab) / 3209 (N5) (Room)

Contact information

Tel: (office) +82-42-350-1713, (lab) +82-42-350-1773
Location: (office) Room 3209 (Bldg. N5), (lab) Room 2156 & 2151 (Bldg. N5)
Fax: +82-42-350-2810

Education

1993: B.S. Seoul National University
1995: M.S. Seoul National University
1999: Ph.D. Seoul National University

Professional Experiences

1999-2002: Postdoctoral fellow, University of Maryland
2002-2009: Postdoctoral fellow and Staff Scientist, Lawrence Berkeley National Laboratory
2009-2016: Associate Professor, KAIST
2013-2016: Group Leader, Center for Nanomaterials and Chemical Reactions, Institute for Basic Science
2016-present : Professor, KAIST and Associate Director, Center for Nanomaterials and Chemical Reactions, Institute for Basic Science

Career

International Committee member of Asian Science Camp
Editorial board member of Scientific Reports
International advisory board of Advanced Materials Interfaces

Awards

KAIST Top 10 Research Achievements (2016)
Top Government R&D Achievement Award (2012, National Science & Technology Commission)
Top 50 Basic Research Achievement Award (2012, National Research Foundation)
KAIST Top 10 Research Achievements (2012)
Monthly Scientist Award (2011, Daejeon City)

RESEARCH AREA


Brief Introduction






In our group, we focus on the fundamental atomic and molecular aspects of chemical reactions in complicated and realistic systems, which is a drastic transformation from the idealized model systems used in the past. We will use metal single crystals, oxide–metal interfaces, solid–liquid interfaces, and synthesize and fabricate metal nanoparticles. In situ experimental techniques capable of accessing different pressure regimes, from ultra-high vacuum to ambient pressure and solid–liquid interfaces, will also be employed. The new surface instruments will be used for atomic-level characterization of surfaces, including sum frequency generation (SFG) surface vibrational spectroscopy, ambient-pressure scanning tunneling microscopy (AP-STM), ambient-pressure atomic force microscopy (AP-AFM), and high-pressure X-ray photoelectron spectroscopy. As the frontiers of molecular surface science move from ultra-high vacuum surface studies of single crystals to high-pressure gas and solid–liquid interfaces to nanocrystals and nanocomposites, We will take the lead by developing prototype instruments for molecular surface studies of chemical structure, bonding, and reactivity. We synthesize metal and nanocomposite nanoparticles, to characterize them, and to study their reactivities. In the group, we have four research topics (surface chemistry, nanocatalysis, hot electron and scanning probe microscopy) as detailed below.


Research topics

 Surface chemistry
Using various surface sensitive techniques under in situ conditions where the chemical reactions are taking place, we aim to reveal the fundamental principles underlying the formation of nanostructures, and to build on this foundation to synthesize highly-efficient nanocatalysts with desired structure and properties.

 Nanocatalysis
It is known that catalytic activity depends on the size, shape, and composition of nanoparticles. We have systematically expanded this study by synthesizing multi-functional nanoparticles of different sizes, including core–shell, yolk–shell, and hybrid nanocatalysts. We collaborated with another research group that has the capability to synthesize and fabricate novel nanocatalysts. These nanoparticles were then characterized using various surface-sensitive techniques.

 Hot Electron
We have demonstrated electronic excitation created during atomic or molecular processes at the surface. This diode scheme has been utilized to show the analogous photocurrent process and its potential application in future solar and chemical energy conversion technologies.

 Scanning Probe Microscopy
Surface science techniques allow us to determine reaction intermediates and surface mobility under catalytic reaction conditions. Scanning probe microscopy (combined with friction and conductance measurements) was utilized at ambient and reaction conditions, which permits us to investigate the nanomechanical (e.g., friction, adhesion, wear, indentation, modulus), charge transport (e.g., conductance, bandgap), and structural properties.

Representative publications

1. Boosting hot electron flux and catalytic activity at metal–oxide interfaces of PtCo bimetallic nanoparticles, Hyosun Lee et al. Nature Comm (2018).
2. Hot Electrons at Solid–Liquid Interfaces: A Large Chemoelectric Effect during the Catalytic Decomposition of Hydrogen Peroxide, Ievgen I. Nedrygailov et al. Angewandte Chemie 2016, 55, 10859-10862 (Selected as Front Cover)
3. The Role of Hot Electrons and Metal-oxide Interfaces in Surface Chemistry and Catalytic Reactions, Jeong Young Park et al. Chemical Reviews 2015, 115, 2781-2817 (Selected as the Front Cover)
4. Enhance Nanoscale Friction on Fluorinated Graphene, Sangku Kwon et al. Nano Letters 2012, 12, 6043-6048 (Highlighted in Nature, Nature 487, 143 (2012).)
5. Friction Anisotropy–Driven Domain Imaging on Exfoliated Monolayer Graphene, Jin Sik Choi et al. Science 2011, 333, 607.
6. Electronic control of friction in silicon pn junctions, Jeong Young Park et al. Science, 2006, 313, 186.
7. High Frictional Anisotropy of Periodic and Aperiodic Directions on a Quasicrystal Surface, Jeong Young Park et al. Science 2005, 309, 1354.