It is true that nature begins by reasoning and ends by experience. Nevertheless, we must begin with experiments and try through it to discover the reason. Leonardro Da Vinci

 

Recent News

5. Prof. Kim will give an invited lecture to introduce achiral microswimmers at low Reynolds numbers at the University of Nevada, Reno. (March 2014) new

4. Prof. Kim has been a recipient of the Louis and Bessie Stein Family Fellowships for research collaborations in AY 2014-2015. The fellowship supports exchanges between Drexel and Israeli Universities. Prof. Kim, in collaboration with Dr. Yizhar Or, the Technion - Israel Institute of Technology, will work on a project for entitled "Microbiorobotic Penetration of Soft Tissues for Therapeutic Targeting." (March 2014) new

3. Prof. Kim has given an invited talk about protein analysis using solid-state nanopores at pioneer workshop 2014 on nanopore and nanofluidics in Osaka University, Japan. (February 2014)

2. Prof. Kim has accepted a position as Associate Editor for International Journal of Advanced Robotic Systems in the "Bioinspired Robotics" section. (January 2014)

1. Kevin has very successfully defended his Ph.D. thesis entitled "The Study of Single Molecule Protein Biophysics Using a Solid-State Nanopore." Kevin will join the Edel Group at Imperial College London for single molecule biophysics research. His postdoctoral fellowship will be supported by the Whitaker Foundation. Congratulations! (December 2013)


Recent Publications

1. Dalhyung (currently at the Rowland Institute at Harvard) and Paul have published a paper in the Journal of Micromechanics and Microengineering, entitled "Galvanotactic behavior of Tetrahymena pyriformis under electric fields." In collaboration with Yonsei University and Korea Institute of Science and Technology, we presented an analysis of galvanotactic swimming mechanics of T. pyriformis quantitatively. This work was supported by KOFST Brain Pool Fellowship and National Science Foundation. (October 2013) new

2. Kevin's paper has been published in ACS Nano, "Detection of long and short DNA using nanopores with graphitic polyhedral edges." In this study, we characterize the drilling kinetics of nanopores using a thermionic electron source and various effect beam fluxes to minimize secondary hole formation. Once established, we investigate the use of multilayer graphene to create highly tailored nanostructures including nanopores with graphite polyhedral crystals formed around the nanopore edge, which show the single stranded DNA translocates much slower allowing detection of extremely short fragments (25 nucleotides in length). Our findings suggest that the kinetic and controllable properties of graphene nanopores under sculpting conditions can be used to further enhance the detection of DNA analytes. (July 2013)

3. Wonjin has published a paper in Nanotechnology, entitled "Influence of the photothermal effect of a gold nanorod cluster on biofilm disinfection." The gold nanorod cluster is directly applied to the biofilm and its effects on bacteria are measured before and after near infrared laser irradiation. The photothermal effect of gold nanorods on the biofilm structure results in a considerable reduction of cell viability and biofilm thickness. Scanning electron microscopy images of the irradiated bacteria show obvious morphological damages such as rupture or collapse of the bacterial cell membrane in the biofilm. These results indicate that gold nanorods are useful and a potential material for use in photothermal treatments, particularly biofilm disinfection. (May 2013)

4. Kevin in collaboration with Prof. Joshua Edel at Imperial College London and Prof. Per Jemth has published his work on detection single molecule protein folding in Nature's Scietific Reports. His work is the first study to map the different folding states of a protein in the presence of an electric field! It was speculated that an electric field may affect the state of a protein due to their positive and negative charge composition however it was mainly based on theory prior to his work. This project has been supported by Human Frontier Science Young Investigator Program and NSF Graduate Research Fellowship Program. (April 2013)

5. Wonjin has presented an improvement in the electrical properties of silica nanotubes by coating metal nanoparticles on their surfaces. By incorporating gold, palladium and iron oxide nanoparticles, the metallized silica nanotubes gain electrical properties with the potential to create unique nanoelectronic materials. The current-voltage characteristics show remarkably improved electrical conductivities depending on the type of metal nanoparticle loading and nanotube network concentration. In collaboration with National Nanofab Center and Sungkyunkwan University in Korea, this finding has been published in Nanotechnology, entitled "Electrical property measurements of metallized flagella-templated silica nanotube networks." This work is funded by the Army Research Office Young Investigator Award (W911NF-10-1-0173). (March 2013)

 

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