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71Â¥2009-03-30 09:39:22
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72Â¥2009-04-05 22:29:11
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73Â¥2009-04-06 12:06:54
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74Â¥2009-04-26 09:59:51
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xiaopei2007

Í­³æ (СÓÐÃûÆø)

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memser(½ð±Ò+10,VIP+0): 7-10 16:25
½éÉܺ«¹úÁ½¸ö×ö´ÅÐÔÄÉÃ×Á£×ӺϳɺÍÉúÎïÓ¦ÓõÄÅ£ÈË£¬Seoul National UniversityµÄHyeon taeghwanºÍYonsei UniversityµÄJinwoo Cheon.


1. [LABORATORY/RESEARCH GROUP/DEPARTMENT]: Our research is focused on the synthesis and application of various nanomaterials.
Especially we are interested in the bio-medical and electronic applications of nanomaterials.

    [LEADER/RESEARCHER]:Hyeon taeghwan

B. S., Seoul National University, Chemistry, 1987

M. S., Seoul National University, Chemistry, 1989

Ph. D., University of Illinois at Urbana-Champaign, Inorganic Chemistry, 1996
Thesis: Nanostructured Catalytic and Magnetic Materials: Sonochemical Synthesis and Characterization;
Advisor: Kenneth S. Suslick


Editorial Board

1) Advanced Materials (Wiley-VCH), since August 2005

2) Chemical Communications (Royal Society of Chemistry), since March 2006

3) Chemistry of Materials (American Chemical Society), since January 2009

4) Small (Wiley-VCH), Founding Editorial Board Member, since 2004

5) International Journal of Nanotechnology, Founding Editorial Board Member since 2003



    [RESEARCH INTERESTS/CURRENT PROJECTS]:

I. Bio-medical applications

We have developed new generalized synthetic procedures to produce various kinds of monodispersed nanocrystals. We have applied these nanocrystals to bio-medical applications.

1) MRI contrast agent

In particular, we developed the first biocompatible nanoparticulate T1 MRI contrast agent for various bodyorgans. We obtained clear T1-weighted MR images of the brain, liver, kidney, and spinal cord from 5 days to 3 weeks after the administration of MnO nanoparticles which depicted fine anatomic structures. This new class of MRI contrast agent will open up a new direction in the applications of MR imaging for biomedical research and targeted therapy using molecular and cellular imaging in future medicine.

2) Multifunctional nanoparticles

We developed the synthesis and bio-medical applications of multifunctional nanoparticles to multimodal imaging probes and simultaneous imaging and therapy. In the porous silica nanoparticles containing various nanoparticles, magnetic nanoparticles and quantum dots were used as MRI imaging and optical imaging and pores in silica were used as vehicles for drug.

3) WBP process

We developed a new general route to induce nanostructural transformation. This process is composed of silica coating/heat treatment/removal of silica (wrap-bake-peel). Water dispersible hollow iron oxide nanocapsules were obtained by applying the wrap-bake-peel process to FeOOH nanoparticles. The synthesized magnetite nanocapsules could be used not only as a drug-delivery vehicle, but also as a T2 MRI contrast agent. The current process is quite general and can be used to transform heterostructured FePt nanoparticles into hightemperature f.c.t.-phase FePt alloy nanocrystals. We expect that this wrap?bake?peel process can be used for the nanostructural transformation of various kinds of material to produce many useful functional nanostructured materials.

II. The synthesis of various nanocrystals

1) The study of formation mechanism of monodisperse nanocrystals

We studied the kinetics of the formation of spherical nanocrystals via the "heat-up" process. The ¡°heat-up process. We constructed a theoretical model describing the ¡°heat-up¡± process and performed a numerical simulation. Through this theoretical work, we showed that the ¡°heat-up¡± process and ¡°hot injection¡± method could be understood within the same theoretical framework. We expect that the concept of the ¡°heating-up¡± process introduced herein can be extended to explain many other synthetic processes.


2) Hollow nanostructures

We synthesized hollow oxide nanoparticles of various sizes, shapes, and compositions such as Iron oxide, Manganese oxide and iron. Because of the unique hollow structure and the spin relaxation enhancement, the hollow oxide nanoparticles have potential for multifunctional biomedical applications such as the drug delivery vehicles and the MRI contrast agents.
75Â¥2009-05-04 10:05:30
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xiaopei2007

Í­³æ (СÓÐÃûÆø)

¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï
memser(½ð±Ò+10,VIP+0): 7-10 16:24
[LABORATORY/RESEARCH GROUP/DEPARTMENT]:Inorganic Chemistry / Materials Chemistry / Nano Science


[LEADER/RESEARCHER]:Jinwoo Cheon

Education
1988 - 1993     Ph.D. University of Illinois, Urbana-Champaign
1985 - 1987     M.S. Department of Chemistry, Yonsei University
1981 - 1985     B.S. Department of Chemistry, Yonsei University

Experience

2008 - present     Horace G. Underwood Chair Professor
2008 - present     Visiting Professor, California NanoSystems Institute, UCLA
2008 - present     Fellow of Royal Society of Chemistry (FRSC)
2006 - present     Director of Convergence Nanomaterials System,
                          National Research Laboratory
2004 - present     Division Head of Nano-Medical National Core Research Center
2003 - present     Junior Member of Korean Academy of Science and Technology
2002 - present     Professor, Department of Chemistry, Yonsei University
1998 - 2002         Assistant and Associate Professor, Department of Chemistry, KAIST
1995 - 1998         Staff Research Associate, Department of Chemistry, UCLA
1993 - 1995         Post Doc.,
                          Lawrence Berkeley National Laboratory & University of California, Berkeley
1993                    Visiting Researcher, AT&T Bell Labs, Murray Hill, NJ


Board Member of Journal of Material Chemistry,  RSC Publishing Group.


[RESEARCH INTERESTS/CURRENT PROJECTS]:

1.Fabrication of Nanomaterials
   - Semiconductors, Magnets, Metals, & Alloys

Nanoparticle synthetic kinetics, design of their assemblies, understanding of nanoscaling laws and phenomena, nanomagnetism
Nanocrystals show different physical ( e.g. magnetic, electric, and optical) properties with their size and shape. With chemically well controlled synthetic method, the size and shape of nanocrystals can be modified.
Especially we research on nanomagnetism which can be predicted by nanoscaling laws.


2.Applications of Nano-materials to Medical Diagnosis and Therapeutics

Cancer detection using magnetic nanomaterials and MRI
Magnetic nanomaterials show different magnetism with their sizes and shapes. Elucidation of nanoscale magnetism and their utilization to biomedical cancer detection system via Magnetic Resonance Imaging (MRI) are under proceeding


3. 2-D Layered NanoSheets for Energy Storage Device

2-D Tungsten Oxide Nanosheet from Transforation of 1-D Tungsten Nanorod
76Â¥2009-05-04 10:16:28
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Ìú¸Ëľ³æ (СÓÐÃûÆø)

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77Â¥2009-05-24 21:19:14
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78Â¥2009-07-10 11:27:00
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QQ1236971

Í­³æ (СÓÐÃûÆø)

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¡¤ Molecule Structure
¡¤ Controlled-Synthesis
¡¤ Tip Enhanced Raman Scattering
79Â¥2009-07-10 11:32:58
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