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People Sung Kwon Cho

Associate Professor, Department of Mechanical Engineering and Materials Science


Phone: 412-624-9798
Fax: 412-624-4846
Office: BENDM 636

Education

Postdoctoral: UCLA Dept. of Mechanical Engineering, MEMS Research Groups, 1999–2003
PhD, Seoul National University, Korea, 1998
MS, Seoul National University, Korea, 1992
BS, Seoul National University, Korea, 1990

Professional Interests

Sung Kwon Cho has been working on designing and fabricating micro-sensors/actuators using MEMS technologies for biomedical applications, such as droplet-based lab-on-a-chip using an electrical control of surface tension (electrowetting) and micro shear stress sensors to link real-time shear stress with cellular and molecular responses of endothelial cells. Currently, his research direction is to develop micro/nano devices that enable us to efficiently manipulate biomolecules (DNA and proteins), cells, functional particles and micro/nano fluids, and to investigate underlying scientific/engineering phenomena in these systems.

For more information, please visit his personal web site.

Selected Publications

Yizhong Wang, Yuejun Zhao, and Sung Kwon Cho, “Efficient in-Droplet Separation of Magnetic Particles for Digital Microfluidics,” Journal of Micromechanics and Microengineering (in print).

Yuejun Zhao, Ui-Chong Yi, and Sung Kwon Cho, “Micro Particle Concentration and Separation by Travelling Wave Dielectrophoresis (twDEP) for Digital Microfluidics,” Journal of Microelectromechanical Systems (in print).

Ho Il Park, Usman Mushtaq, David Perello, Innam Lee, Sung Kwon Cho, and Minhee Yun “Effective and Low-Cost Platinum Electrodes for Microbial Fuel Cells Deposited by Electron Beam Evaporation,” Energy and Fuels (in print).

S. K. Cho, Y. Zhao and C.-J. Kim “Concentration and Binary Separation of Micro Particles for Droplet-Based Digital Microfluidics,” Lab on a Chip, Vol. 7, pp. 490-498, 2007.

Y. Zhao and S. K. Cho, “Micro Air Bubble Manipulation by Electrowetting on Dielectric (EWOD): Transporting, Splitting, Merging and Eliminating of Bubbles,” Lab on a Chip, Vol. 7, pp. 273-280, 2007.

Y. Zhao and S. K. Cho, “Microparticle Sampling by Electrowetting-Actuated Droplet Sweeping,” Journal of Lab on a Chip, Vol. 6, pp. 137-144, 2006.

C. Jewart, B. McMillen, S. K. Cho, and K. P. Chen, “X-Probe Flow Sensor Using Self-Powered Active Fiber Bragg Gratings,” Sensors and Actuators A, Vol. 127, pp. 63-68, 2006.

T. K. Hsiai, S. K. Cho, P. K. Wong, M. H. Ing, A. Salazar, S. Hama, M. Navab, L. L. Demer, C.-M. Ho, 2004, “Micro Sensors: Linking Real-Time Oscillatory Shear Stress with Vascular Inflammatory Responses,” Annals of Biomedical Engineering, Vol. 32, pp. 189-201.

S.K. Cho and C.J. Kim, "Particle Separation and Concentration Control for Digital Microfluidics," The 16th Annual IEEE International Conference on MEMS (MEMS 2003), Kyoto, Japan, Jan 2003, pp. 686–689.

S.K. Cho, H. Moon, and C.-J. Kim, 2003, "Creating, Transporting, Cutting and Merging of Liquid Droplets by Electrowetting-Based Actuation for Digital Microfluidic Circuits," Journal of Microelectromechanical Systems, Vol. 12, No. 1, pp. 70–80.

H. Moon, S.K. Cho, R.L. Garrell, and C.-J. Kim, 2002, "Low Voltage Electrowetting-On-Dielectric," Journal of Applied Physics, Vol. 92, No. 7, pp. 4080–4087.

T.K. Hsiai, S.K. Cho, P.K. Wong, M. Ing, A. Salazar, A. Scvarrian, M. Navab, L.L. Demer, and C.M. Ho, 2003, "Monocyte recruitments to endothelial cells in response to oscillatory shear stress," The FASEB (Federation of American Societies for Experimental Biology) Journal (in press).

T.K. Hsiai, S.K. Cho, J.M. Yang, X. Yang, Y.C. Tai, and C.M. Ho, 2002, "Pressure Drops of Water Flow through Micromachined Particle Filters," ASME Journal of Fluids Engineering, Vol. 124, No. 4, pp. 1053–1056.

T.K. Hsiai, S.K. Cho, H.M. Honda, S. Hama, M. Navab, L.L. Demer, A.M. Fogelman, and C.M. Ho, 2002, "Endothelial Cell Dynamics under Pulsating Flows: Significance of High-vs. Low Shear Stress Slew Rates (d(tau)/dt)," Annals of Biomedical Engineering, Vol. 30, No. 5, pp. 646–656.

T.K. Hsiai, S.K. Cho, S. Reddy, S. Hama, M. Navab, L. Demer, H.M. Honda, and C.M. Ho, 2001, "Pulsatile Flow Regulates Monocyte Adhesion to Oxidized Lipid-Induced Endothelial Cells," Arteriosclerosis Thrombosis and Vascular Biology, Vol. 21, pp. 1770–1776.

S.K. Cho, J.Y. Yoo, H. Choi, 2000, "Resonance in an axisymmetric jet under controlled helical fundamental and axisymmetric subharmonic forcing," AIAA Journal, Vol. 38, No. 3, pp. 434–441.

S.K. Cho, J.Y. Yoo, H. Choi, 1998, "Vortex pairing in an axisymmetric jet using two-frequency acoustic forcing at low to moderate Strouhal numbers," Experiments in Fluids, Vol. 25, pp. 305–315.

faculty

The Department of Mechanical Engineering has 16 full time, 6 adjunct, and 5 emeritus faculty members