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='''Imaging Reaction Dynamics in Living Cells'''=
=='''Carbon Nano Tube & Graphene'''==
[[Image:CNT.JPG|left|400 px]]
We are interested in every aspect of conductive materials such as electronic and mechanical properties. In addition, we want to see how they interact with other chemicals. Thus, the adsorption and mixing behavior are investigated.<br>
<br><br><br><br>
 
=='''Hydrogel for Biomedical Applications'''==
[[Image:Hydrogel.JPG|right|500 px]]
We pursue fundamental understanding of hydrogel system by characterizing the structure-property relationship of given materials. Based on such relationship, we design new hydrogel system for better properties such as excellent biocompatibility, optimal mechanical strength, proper permeation of gas & nutrition and smart response to external conditions. <br>
<br><br><br><br><br><br><br><br>
 
=='''Fuel Cell Technology'''==
[[Image:Fuel_cell.JPG|left|600 px]]
We are investigating the atomistic/molecular mechanisms in fuel cell system, which serves to develop better materials and better configurations.<br>
For membrane, we are investigating the nanophase-segregation consisting of water phase and polymer phase in order to understand the proton conduction within that specific material. Based on such knowledge, we design new chemical structures of membrane materials.<br>
For electrode, we are studying i) the interface between membrane and electrode and ii) the electrochemical events on electrode.<br>
<br><br><br><br><br>
 
=='''NanoElectronics and NanoMechanics'''==
[[Image:Cyclo.JPG|right|300 px]]
We are interested in nano-meter scale system consisting of organic/inorganic materials to aim at developing electronic/mechanic devices. For this, we pursue fundamental understanding of tunneling, atomic displacement and molecular deformation in molecular self-assembly at various conditions.<br>
Such fundamental understandings will enable us to achieve better stability and performance.<br>
<br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br>
 
=='''Research Collaborators'''==
<b>Prof. William A. Goddard, III</b> <br>
California Institute of Technology <br>
Materials and Process Simulation Center <br>
Chemistry, Chemical Engineering, Materials Science and Engineering, Applied Physics <br>
<br>
 
<b>Prof. James R. Heath</b> <br>
California Institute of Technology <br>
Chemistry <br>
<br>
 
<b>Prof. J. Fraser Stoddart</b> <br>
Northwestern University <br>
Chemistry <br>
<br>
 
<b>Prof. Mark E. Davis</b> <br>
California Institute of Technology <br>
Chemical Engineering <br>
<br>
 
<b>Prof. Yushan Yan</b> <br>
University of California, Riverside <br>
Chemical & Environmental Engineering <br>
<br>
 
<b>Dr. Yue Qi</b> <br>
General Motors <br>
R&D Center <br>
<br>
 
<b>Prof. Shiang-Tai Lin</b> <br>
National Taiwan University <br>
Chemical Engineering <br>
<br>


[[Image:cell_rxns_paynelab.gif|right|390 px]]
<b>Prof. David Bucknall</b> <br>
Cells are dynamic environments that use carefully regulated mechanisms to maintain function and health. One example of this is the vesicle-mediated transport of lipids (shown to the right). Each bright spot shows a single vesicle as it transports lipids through the cell. Each step of this process; internalization, transport in the vesicle, and enzymatic degradation of the lipids, is controlled by chemical reactions and mechanical forces within the cell. Understanding these dynamic processes requires a method that will provide both spatial and temporal information-the ability to watch each step as it occurs. To obtain this information we use fluorescence microscopy to directly probe intracellular dynamics. The Payne Lab is interested in two related questions; what are the rates and mechanisms of these intracellular processes and how can we better image each event.
Georgia Institute of Technology <br>
Polymer, Textile and Fiber Engineering <br>
Materials Science and Engineering <br>
<br>


<b>Prof. Vladimir Tzukruk</b> <br>
Georgia Institute of Technology <br>
Materials Science and Engineering <br>
Polymer, Textile and Fiber Engineering <br>
<br>


==='''Imaging chemical reactions within a cell.'''===
<b>Prof. Rina Tannenbaum</b> <br>
Georgia Institute of Technology <br>
Materials Science and Engineering <br>
<br>


Direct imaging reveals the subcellular location, concentration, and reaction rate of the molecules of interest. These parameters can be measured to determine a complete intracellular reaction mechanism. Specific systems of interest include post-translational modification of proteins, transcytosis across the blood-brain barrier, and delivery of cargo to the lysosome for degradation. These systems pose a number of biological and physical questions including the mechanism of intracellular transport, kinetics of vesicle fusion, influence of the local environment on a chemical reaction, and the conversion of chemical energy into mechanical motion.
<b>Prof. Zhong Lin Wang</b> <br>
Georgia Institute of Technology <br>
Materials Science and Engineering <br>
<br>


<b>Prof. Jaehong Kim</b> <br>
Georgia Institute of Technology <br>
Civil and Environmental Engineering <br>
<br>


==='''New methods for live cell imaging: Fluorescence microscopy and nanomaterial delivery.'''===
<b>Dr. Gene Kim</b> <br>
Cookson Electronics <br>
Assembly Materials Group <br>
<br>


The Payne Lab is developing new optical techniques for live cell imaging and new methods for delivering novel fluorescent probes to cells. These methods will be used to probe intracellular reactions on the molecular level and to enable new research directions using quantitative cellular imaging. Optical methods of interest include nanometer-level imaging, spectroscopic single-particle tracking, and multiphoton total internal reflection. The intracellular delivery of novel fluorescent probes will borrow methods developed for gene delivery to introduce fluorescent probes and other nanomaterials into cells in a controlled manner.
<b>Prof. Jongman Kim</b> <br>
Georgia Institute of Technology <br>
Electrical and Computer Engineering <br>

Revision as of 20:15, 22 February 2009

Home        Research        Members        Publications        Presentations        News        Links        Contact       


Carbon Nano Tube & Graphene

We are interested in every aspect of conductive materials such as electronic and mechanical properties. In addition, we want to see how they interact with other chemicals. Thus, the adsorption and mixing behavior are investigated.




Hydrogel for Biomedical Applications

We pursue fundamental understanding of hydrogel system by characterizing the structure-property relationship of given materials. Based on such relationship, we design new hydrogel system for better properties such as excellent biocompatibility, optimal mechanical strength, proper permeation of gas & nutrition and smart response to external conditions.








Fuel Cell Technology

We are investigating the atomistic/molecular mechanisms in fuel cell system, which serves to develop better materials and better configurations.
For membrane, we are investigating the nanophase-segregation consisting of water phase and polymer phase in order to understand the proton conduction within that specific material. Based on such knowledge, we design new chemical structures of membrane materials.
For electrode, we are studying i) the interface between membrane and electrode and ii) the electrochemical events on electrode.





NanoElectronics and NanoMechanics

We are interested in nano-meter scale system consisting of organic/inorganic materials to aim at developing electronic/mechanic devices. For this, we pursue fundamental understanding of tunneling, atomic displacement and molecular deformation in molecular self-assembly at various conditions.
Such fundamental understandings will enable us to achieve better stability and performance.
















Research Collaborators

Prof. William A. Goddard, III
California Institute of Technology
Materials and Process Simulation Center
Chemistry, Chemical Engineering, Materials Science and Engineering, Applied Physics

Prof. James R. Heath
California Institute of Technology
Chemistry

Prof. J. Fraser Stoddart
Northwestern University
Chemistry

Prof. Mark E. Davis
California Institute of Technology
Chemical Engineering

Prof. Yushan Yan
University of California, Riverside
Chemical & Environmental Engineering

Dr. Yue Qi
General Motors
R&D Center

Prof. Shiang-Tai Lin
National Taiwan University
Chemical Engineering

Prof. David Bucknall
Georgia Institute of Technology
Polymer, Textile and Fiber Engineering
Materials Science and Engineering

Prof. Vladimir Tzukruk
Georgia Institute of Technology
Materials Science and Engineering
Polymer, Textile and Fiber Engineering

Prof. Rina Tannenbaum
Georgia Institute of Technology
Materials Science and Engineering

Prof. Zhong Lin Wang
Georgia Institute of Technology
Materials Science and Engineering

Prof. Jaehong Kim
Georgia Institute of Technology
Civil and Environmental Engineering

Dr. Gene Kim
Cookson Electronics
Assembly Materials Group

Prof. Jongman Kim
Georgia Institute of Technology
Electrical and Computer Engineering

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