korea inu



Nano Material Science Lab

 Name   jong-dal hong
 Office   No. 05-450 / TEL : +82-32-835-8234 / E-mail : hong5506@incheon.ac.kr
 Lab   Nano material science Lab / No. 05-402 / TEL : +82-32-835-4557
 Homepage   http://prof.incheon.ac.kr/~hong5506/

 Research Fields

• main research field
   Molecular design and self-assembly for organic thin films and functional nanomaterials

• detail research field
   - Electrostatically Self-Assembled Stimuli-responsive Materials :
     (Optical gates for control of material transport, Manipulation of surface properties, Ion separation, ion sensing,
     Cathode separation membrane of Li-batterie)
   - Nanomaterials for dye-sensitized solar cell
     (Far-red/near ir-dye, Solid-state electrolytes, Morphology manipulation based on self-assembly techniques)




 Education

• B.S. Johannes Gutenberg University of Mainz, Germany, 1985
• M.S. Johannes Gutenberg University of Mainz, Germany, 1988
• Ph.D. Johannes Gutenberg University of Mainz, Germany, 1992




 Research Interests

Molecular design and self-assembly for organic thin films and functional nanomaterials :
The main aim of our research is to specialize in designing and synthesizing organic thin films based on molecular self-assembly in order to manipulate order and function. Accordingly, the development of advanced materials followed by variation of molecular and supramolecular structure with respect to specific applications is of particular interest.

Our major research areas are :

• Electrostatically Self-Assembled Stimuli-responsive Materials :

Optical gates for control of material transport, Manipulation of surface properties, Ion separation, ion sensing, Cathode separation membrane of Li-batterie Response to stimulus is a basic process of living systems These responses lead to dramatic changes of material properties: shape, surface characteristics, solubility, formation of an intricate molecular self-assembly or a sol-to-gel transition. The research in the field aims at the applications in delivery of therapeutics, tissue engineering, bioseparations, sensors, actuators, etc.

We have designed and investigated molecular switches based on azobenzene or oxazine which specifically respond to light and pH among various other external stimuli. Recently, an optical molecular switch in polyelectrolyte multilayer films was demonstrated for reversible controls on the ion flow by means of the light-induced reversible Z/E isomerization of azobenzene or chromophore orientation.


• Nanomaterials for dye-sensitized solar cell :

Far-red/near ir-dye, Solid-state electrolytes, Morphology manipulation based on self-assembly techniques To date, the development of photovoltaic cells efficiently harvesting solar energy becomes a challenging research area according to the rapidly growing world energy demand as well as the global climate change. This is more apparent if we would consider the fact that more energy from sunlight strikes the Earth in one hour (4.3 × 1020 J) than all the energy consumed on the planet in a year (4.1 × 1020 J). Dye-sensitized solar cell (DSC), introduced by Graetzel at 1991, is attracting great concern for the replacement of solid-state photovoltaic devices based on silicon which are dominated in the current market.

However, an overall conversion efficiency limit of 10~12% has been not broken through since the last decade. Our group focuses on synthesis of various photosensitizers, solid-state electrolytes, and the manipulation of nanocrystalline layers based on self-assembly techniques for the optimization of the cell efficiency.




 Selected Publications

“Photoregulation of Ion Permeation through a Polyelectrolyte Multilayer Membrane by Manipulating the Chromophore Orientation”, Surjith K. Kumar, Jousheed Pennakalathil,Tea Hyan Kim, Kyuwon Kim, Jong Ku Park and Jong-Dal Hong. Langmuir 2009, 25, 1767-1771.

“Photoresponsive Ion Gating Function of an Azobenzene Polyelectrolyte Multilayer Spin-Self-Assembled on a Nanoporous Support”, Surjith K. Kumar and Jong-Dal Hong. Langmuir 2008. 24, 4190-4193.

“Electrostatic Self-Assembly of a Macrocyclic Amphiphile for Inducing the Flat Orientation of Chromophores”, Surjith K. Kumar, Jong-Ku Park, Jong-Dal Hong, Langmuir 2007, 23, 5093- 5096.

“Preparation of Pd Nanocrystals onto Trenched Silicon Devices Confirmed by Electron Tomography”, Jong-Bong Park, Dong Kee Yi, Jae-Young Choi, Seong Jae Choi, In-Yong Song, Jang-Ho Lee, Minshi An, and Jong-Dal Hong J. Electrochem. Soc. 2007, 154, H202-H204.

“Synthesis and Photoisomerization Characteristics of a 2,4,4'-Substituted Azobenzene Tethered to the Side Chains of Polymethacrylamide”, Surjith K. Kumar, Jong-Dal Hong, Chang-Keun Lim, Soo-Young Park. Macromolecules 2006, 39, 3217-3223.

“Evidence for Spin Coating Electrostatic Self-Assembly of Poly-electrolytes”, Seung-Sub Lee, Ki-Bong Lee, Jong-Dal Hong, Langmuir 2003, 19, 7592-7596.

"Photochromic Hollow Shells: Photoisomerization of Azobenzene Polyionene in Solution, in Multilayer Assemblies on Planar and Spherical Surfaces",B. D. Jung and J.-D. Hong, A. Voigt, S. Leporatti, L. Dane, E. Donath, and H. Mohwald, Colloids and Interfaces A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS 2002, 198-200, 483-489.

"Fabrication of multilayer films using spinning process", Jinhan Cho, Kookheon Char, Jong-Dal Hong, Ki-Bong Lee, Adv. Mater. 2001, 13, 1076-1078.

"Layer-by-layer deposited multilayer assemblies of ionene-type polyelectrolytes based on spin-coating method", Seung-Sub Lee, Jong-Dal Hong, Chang Hwan Kim, Kwan Kim,Ja Pil Koo, Ki-Bong Lee, Macromolecules 2001, 34, 5358-5360.





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