|
|
|
|
|
Jeong
|
|
I am
mainly interested in fundamental aspects of energy dissipation and conversion
at surfaces and interfaces. Once the external energy is deposited to the
surface during the mechanical interaction, chemical processes, or absorption
of photons, energy dissipation at surfaces and interfaces is mediated by
excitation of elementary processes including surface phonons and electronic
excitations. Understanding atomic mechanism of energy dissipation has great
importance in the community of surface science, and may give intriguing
possibility of controlling surface phenomena such as friction, chemical
processes, or photon energy conversion. My
research topics include; 1) Detection and utilization of hot electron flows
generated under exothermic catalytic reactions. It was found that the
chemicurrent is correlated with the catalytic turnover rate of CO oxidation.
2) Hot electron detection on Pt colloid nanoparticle surfaces with
metal-oxide Schottky diodes. 3) Investigation of influence of size, shape,
and composition in Pt and Rh nanoparticles and bimetallic nanoparticles on
the catalytic activity. 4)
fundamental aspects of energy dissipation in friction – elucidation of
electronic contribution in friction and atomic scale friction and adhesion
properties of complex metallic alloys including decagonal quasicrystals. 5) Charge transport properties and mechanical
properties in organic molecules. Selected Publications 1.
Gabor A. Somorjai, and Jeong Y. Park, “Molecular Factors of Catalytic
Selectivity” Angewandte
Chemie Int. Ed. (Reviews) 47, 9212 – 9228 (2008). Selected
as the Cover.
2.
Sang Hoon Joo, Jeong Young Park, Chia-Kuang Tsung, Yusuke
Yamada, Peidong Yang and Gabor A. Somorjai “Thermally Stable Nanocatalysts
for High Temperature Reactions: Pt-Mesoporous Silica Core-Shell
Nanoparticles” Nature
Materials (in press, 2008). DOI: 10.1038/NMAT2329
3.
Jeong
Young Park, and P. A. Thiel, “Atomic scale friction and adhesion
properties of quasicrystal surfaces” Journal of
Physics: Condensed Matter 20, 314012 (2008).
4.
Jeong
Y. Park, Hyunjoo Lee, J. Russell Renzas, Yawen Zhang, and Gabor
A. Somorjai "Probing Hot Electron Flow Generated on Pt Nanoparticles
with Au/TiO2 Schottky Diodes during Catalytic CO Oxidation" Nano
Letters 8, 2388-2392 (2008).
5. Jeong Young Park,
Yawen Zhang, Michael Grass, Tianfu Zhang, and Gabor A. Somorjai “Tuning of
Catalytic CO oxidation by Changing Composition of Rh-Pt Bimetallic
Nanoparticles” Nano
Letters, 8, 673 -677, (2008).
6.
Gabor A. Somorjai and Jeong Y. Park, “Frontiers of Surface Science” Physics
Today (feature article) 60, 48 (2007)
7.
Jeong Young Park, D. F.
Ogletree, P. A. Thiel, and M. Salmeron, “Electronic control of friction in
silicon pn junctions “ Science,
313, 186, (2006).
8.
Gabor A. Somorjai, Roger L. York, Derek Butcher and Jeong Y. Park, “The Evolution of Model Catalytic
Systems; Studies of Structure, Bonding and Dynamics from Single Crystal Metal
Surfaces to Nanoparticles, and from Low Pressure (< 10-3 Torr)
to High Pressure (> 10-3 Torr) to Liquid Interfaces” Phys.
Chem. Chem. Phys., (invited review paper), 9, 3500-3513 (2007).
9.
Jinyu Chen, Imma Ratera, J. Y. Park, and Miquel Salmeron,
“Velocity dependence of friction and hydrogen
bonding effects” Phys.
Rev. Lett. 96, 236102 (2006).
10. Jeong
Young Park, and Gabor A. Somorjai, “The Catalytic Nanodiode: Detecting Continuous Electron
Flow at Oxide-Metal Interfaces Generated by Gas Phase Exothermic Chemical
Reaction” ChemPhysChem
(invited concept article) 7,
1409 (2006).
11. Jeong
Young Park, D. F. Ogletree, M. Salmeron, R. A.
Ribeiro, P. C. Canfield, C. J. Jenks, and P. A. Thiel, “High Frictional
Anisotropy of Periodic and Aperiodic Directions on a Quasicrystal Surface “ Science
309, 1354 (2005).
12. Jeong
Young Park, G. M. Sacha, M. Enachescu, D. F.
Ogletree, R. A. Ribeiro, P. C. Canfield, C. J. Jenks, and P. A. Thiel, J. J.
Sáenz, and M. Salmeron “Sensing dipole fields at atomic steps with combined
scanning tunneling and force microscopy” Phys. Rev. Lett. 95, 136802 (2005).
13. Jeong
Young Park, D. F. Ogletree, M. Salmeron, R. A.
Ribeiro, P. C. Canfield, C. J. Jenks, and P. A. Thiel,
“Atomic scale coexistence of periodic and quasiperiodic order in a 2-fold
Al-Ni-Co decagonal quasicrystal surface” Phys.
Rev. B 72 (Rapid Communication), 220201 (2005).
|
|
