California NanoSystems Institute
CNSI
Text Size: A A A A

Chang-Jin Kim, Ph.D.

   
Professor, Mechanical and Aerospace Engineering
Member, NanoMechanical and Nanofluidic Systems, California NanoSystems Institute, Neuroengineering Training Program

Education:
Degrees:
Ph.D., University of California, Berkeley, 1991
M.S., Iowa State University, 1985
B.S., Seoul National University, 1981

Contact Information:
Email Address: cjkim@ucla.edu
Work Email Address: cjkim@seas.ucla.edu
Mailing Address: Department of Mechanical and Aerospace Engineering
Mail Code: 159710
Los Angeles, CA 90095
UNITED STATES
Office: http://www.mae.ucla.edu/academics/faculty/index.htm
ARR Papers: http://www.cnsi.ucla.edu/arr/personnel-papers?personnel_id=113120
Home Page: http://cjmems.seas.ucla.edu/
Fax Number: (310) 206-2302
Office Phone Number: (310) 825-0267
Research Interests:

  • Surface-tension-based micro and nano actuation
  • Nanotechnologies
  • Microelectromechanical systems (MEMS)
  • Full spectrum of micromachining technologies
  • Micro and nano devices and systems



Technical Research Interest:

Professor Kim's research encompasses: 1) advancing the understanding of physical phenomena in micro/nano scale; 2) broadening and advancing micro/nano fabrication techniques; and 3) developing new micro/nano mechanical devices for applications. A typical research project has all three of the above aspects intertwined, starting with a daring new design concept based on scale effect and ending with demonstration devices for real-world applications. Good examples are the projects using surface tension as a key mechanical element in the design. Surface tension is merely an interesting force in normal scale but a dominant force in the world below a millimeter. A series of demonstration devices span from those using surface tension to passively impede movement, such as bubble check valves, to those controlling surface tension to actively generate motion, such as electrowetting-on-dielectric (EWOD) devices; the latter spawned the new field of digital microfluidics. For nanotechnology, the main interest is formed around mechanical issues. An example is development of novel macro properties by creating intricate 3-D nanostructures. Although all the research projects are based on miniaturization, their application areas are anywhere from biomedical (handheld lab-on-a-chip system, micromachined pins and particles for microarrays), electronics (liquid-metal microswitches), energy (micro fuel cell, 3-D microbatteries), to aerospace (micro cryogenic coolers).


Additional Information:

Chang-Jin "CJ" Kim received the Ph.D. degree in mechanical engineering from the University of California at Berkeley in 1991. He received the B.S. degree from Seoul National University and M.S. from Iowa State University along with the Graduate Research Excellence Award. Upon joining the faculty at UCLA in in 1993, he has developed several MEMS courses and established a MEMS Ph.D. major field in Mechanical and Aerospace Engineering Department. His research is in MEMS and Nanotechnology, including design and fabrication of micro/nano structures, actuators and systems, with a recent focus on the use of surface tension. Prof. Kim is the recipient of the 1995 TRW Outstanding Young Teacher Award and the 1997 NSF CAREER Award.

Prof. Kim served as Chairman of the Micromechanical Systems Panel of the ASME DSC Division and co-organized the MEMS Symposia between 1994 and 1996 for the ASME International Mechanical Engineering Congress & Exposition. He also organized the 1996 ASME Satellite Broadcast Program on MEMS and the 6th IEEE International Conference on Emerging Technologies and Factory Automation. Prof. Kim served in various Technical Program Committees, including the IEEE MEMS Conference, Transducers, and the SPIE Symposium on Micromachining and Microfabrication. Currently he is serving in the U.S. Army Science Board as Consultant, in the Executive Committee of ASME MEMS Subdivision, and as a Subject Editor for the IEEE/ASME Journal of MEMS.



Selected Publications:

Choongyeop Lee and Chang-Jin Kim , Underwater Restoration and Retention of Gases on Superhydrophobic Surfaces for Drag Reduction, Phys. Rev. Lett, 2011, 106 (1), 014502.
Yao DJ, Chen G, Kim CJ, Design and Analysis of an In-Plane Thermoelectric Microcooler, Nanoscale and Microscale Thermophysical Engineering, 2010, 14 (2), 95-109.
Nelson WC, Peng I, Lee GA, Loo JA, Garrell RL, Kim CJ, Incubated Protein Reduction and Digestion on an Electrowetting-on-Dielectric Digital Microfluidic Chip for MALDI-MS, Analytical Chemistry, 2010, 82 (23), 9932-9937.
Sen, P., Chang-Jin Kim , A Fast Liquid-Metal Droplet Microswitch Using EWOD-Driven Contact-Line Sliding, Journal of Microelectromechanical Systems, 2009, 18 (1), 174-185.
Sen P, Kim CJ, A Liquid-Solid Direct Contact Low-Loss RF Micro Switch, Journal OF Microelectromechanical Systems, 2009, 18 (5), 990-997.
Prosenjit Sen and Chang-Jin Kim, Capillary Spreading Dynamics of Electrowetted Sessile Droplets in Air, Langmuir, 2009, 25 (8), 4302–4305.
Choi, C. H. Heydarkhan-Hagvall, S. Wu, B. M. Dunn, J. C. Y. Beygui, R. E. Kim, C. J., Cell growth as a sheet on three-dimensional sharp-tip nanostructure, Journal of Biomedical Materials Research Part A, 2009, 89A (3), 804-817.
Shah GJ, Ohta AT, Chiou EP, Wu MC, Kim CJ., EWOD-driven droplet microfluidic device integrated with optoelectronic tweezers as an automated platform for cellular isolation and analysis, Lab on a Chip, 2009, 9 (12), 1732-9.
L. Hu, G. Gruner, J. Jenkins and C.-J. Kim, Flash dry deposition of nanoscale material thin film, Soft Matter, 2009, 19, 5845 - 5849.
Rihui He, CJ Kim , Low-Temperature Monolithic Encapsulation Using Porous-Alumina Shell Anodized on Chip, Journal of Microelectromechanical Systems, 2009, 18 (3), 588-596.
Lee C, Kim CJ., Maximizing the giant liquid slip on superhydrophobic microstructures by nanostructuring their sidewalls, Langmuir, 2009, 25 (21), 12812-8.
Shah, G.J., Chang-Jin Kim , Meniscus-Assisted High-Efficiency Magnetic Collection and Separation for EWOD Droplet Microfluidics, J. Microelectromechanical Systems, 2009, 18 (2), 363-375.
Lee C, Choi CH, Kim CJ., Structured surfaces for a giant liquid slip, Phys Rev Lett, 2008, 101 (6).
D. D. Meng, T. Cubaud, C.-M. Ho and C.-J. Kim, A Methanol-Tolerant, Gas-Venting Microchannel for a Micro Direct Methanol Fuel Cell, J. Microelectromechanical Systems, 2007, 16 (6), 1403-10.
C.-H. Choi, S. H. Hagvall, B. M. Wu, J. C. Y. Dunn, R. E. Beygui, and C.-J. Kim, Cell Interaction with Three-Dimensional Sharp-Tip Nanotopography, Biomaterials, 2007, 28 (9), 1672-1679.
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, 2007, 7 (4), 490-498.
R. He and C.-J. Kim, On-Wafer Monolithic Packaging by Surface Micromachining with Porous Polysilicon Shell, J. Microelectromechanical Systems, 2007, 16 (2), 462-72.
D. D. Meng, J. Kim, and C.-J. Kim, A Degassing Plate with Hydrophobic Bubble Capture and Distributed Venting for Microfluidic Devices, Micromechanics and Microengineering, 2006, 16, 419-424.
Y.-W. Lu and C.-J. Kim, A Microhand for Biological Applications, Applied Physics Letters, 2006, 89 (16), 164101-164104.
U.-C. Yi and C.-J. Kim, Characterization of Electrowetting Actuation on Addressable Single-Side Coplanar Electrodes, J. Micromechanics and Microengineering, 2006, 16, 2053-2059.
C.-H. Choi, U. Ulmanella, J. Kim, C.-M. Ho, and C.-J. Kim, Effective Slip and Friction Reduction in Nanograted Superhydrophobic Microchannels, Physics of Fluids, 2006, 18 (8).
W. Shen, R. T. Edwards, and C.-J Kim,, Electrostatically-Actuated Metal-Droplet Microswitches Integrated on CMOS Chip, J. Microelectromechanical Systems, 2006, 15 (4), 879-89.
C.-H. Choi and C.-J. Kim, Fabrication of Dense Array of Tall Nanostructures over a Large Sample Area with Sidewall Profile and Tip Sharpness Control, Nanotechnology, 2006, 17 (2006), 5326-5333.
H. Moon, A. R. Wheeler, R. L. Garrell, J. A. Loo, and C.-J. Kim,, Integrated Digital Microfluidic Chip for Multiplexed Proteomic Sample Preparation and Analysis by MALDI-MS, Lab on a Chip, 2006, 6 (9), 1213-9.
C.-H. Choi and C.-J. Kim,, Large slip of aqueous liquid flow over a nano-engineered super-hydrophobic surface, Physics Review Letters, 2006, Vol. 96 (6), 066001.
J. Ok, Y.-W. Lu, and C.-J. Kim, Pneumatically Driven Microcage for Microbe Manipulation in a Biological Liquid Environment, J. Microelectricalmechanical Systems , 2006, 15 (6), 1499-1505.
J. G. F. Tsai, Z. Chen, S. F. Nelson, and C.-J. Kim, Selective Surface Treatment of Micro Printing Pin and Its Performance, Applied Physics Letters, 2006, 89 (8), 083901.
A. R. Wheeler, H. Moon, C. A. Bird, R. R. O. Loo, C.-J. Kim, J. A. Loo, and R. L. Garrell, Digital Microfluidics with In-line Sample Purification for Proteomics Analyses with MALDI-MS, Analytical Chemistry, 2005, 77 (2), 534-540.
J.-A. Paik, et al., Development of Spin Coated Mesoporous Oxide Films for MEMS Structures, J. Electroceramics, 2004, 13 (1-3), 423-8.
A. R. Wheeler, H. Moon, C.-J. Kim, J. A. Loo, and R. L. Garrell, Electrowetting-Based Microfluidics for Analysis of Peptide and Proteins by Matrix Assisted Laser Desorption/Ionization Mass Spectrometry (MALDI-MS), Analytical Chemistry, 2004, 76 (16), 4833-8.
R. Yokokawa, J.-A. Paik, B. Dunn, N. Kitazawa, H. Kotera, and C.-J. Kim, Mechanical Properties of Aerogel-Like Thin Films Used for MEMS, J. Micromechanics and Microengineering, 2004, 14, 681-686.
U.-C. Yi and C.-J. Kim, Soft Printing of Droplets Pre-Metered by Electrowetting, Sensors and Actuators A, 2004, 114 (2-3), 347-354.
C.-J. Kim, Chapter 18: The Use of Surface Tension for the Design of MEMS Actuators, Nanotribology: Critical Assessment and Research Needs, 2003, 239-246.
S. K. Cho, H. Moon, and C.-J Kim, Creating, Transporting, Cutting, and Merging Liquid Droplets by Electrowetting-Based Actuation for Digital Microfluidic Circuits, J. MEMS, 2003, 12 (1), 70-80.
B. Shapiro, H. Moon, R. Garrell, and C.-J. Kim, Equilibrium Behavior of Sessile Drops under Surface Tension, Applied External Fields, and Material Variations, Journal of Applied Physics, 2003, 93 (9), 5794-5811.
T. B. Jones, J. D. Fowler, Y. S. Chang, and C.-J. Kim, Frequency-Based Relationship of Electrowetting and Dielectrophoretic Liquid Microactuation, Langmuir, 2003, 19 (18), 7646-7651.
P. Y. Chiou, H. Moon, H. Toshiyoshi, C.-J. Kim and M. C. Wu, Light Actuation of Liquid by Optoelectrowetting, Sensors and Actuators A, 2003, 104 (3), 222-228.
D. Huh, A. H. Tkaczyk, J. H. Bahng, Y. Chang, H.-H. Wei, B. Grotberg, C.-J. Kim, K. Kurabayashi, and S. Takayama, Reversible Switching of High-Speed Air-Liquid Two-Phase Flows Using Electrowetting-Assisted Flow-Pattern Change, J. Am. Chem. Soc, 2003, 125 (48), 14678-14679.
F.-G. Tseng, C.-J. Kim, and C.-M. Ho, A High Resolution High Frequency Monolithic Top-Shooting Microinjector Free of Satellite Drops: Part I, Concept, Design and Model, J. Microelectromechanical Systems, 2002, 11 (5), 427-436.
F.-G. Tseng, C.-J. Kim, and C.-M. Ho, A High Resolution High Frequency Monolithic Top-Shooting Microinjector Free of Satellite Drops: Part II: Fabrication, Implementation, and Characterization, J. Microelectromechanical Systems, 2002, 11 (5), 437-447.
J. Kim, W. Shen, L. Latorre, and C.-J. Kim, A Micromechanical Switch with Electrostatically Driven Liquid-Metal Droplet, Sensors and Actuators, 2002, 97-98, 672-679.
K.-S. Yun, I.-J. Cho, J.-U. Bu, C.-J. Kim, and E. Yoon , A Surface-Tension Driven Micropump for Low Voltage and Low Power Operations, J. Microelectromechanical Systems, 2002, 11 (5), 454-461.
L. Latorre, J. Kim, J. Lee, P.-P. de Guzman, H. J. Lee, P. Nouet, and C.-J. Kim, Electrostatic Actuation of Microscale Liquid-Metal Droplets, J. Microelectromechanical Systems, 2002, 11 (4), 302-308.
J. Lee, H. Moon, J. Fowler, T. Schoellhammer, and C.-J. Kim, Electrowetting and electrowetting-on-dielectric for microscale liquid handling, Sensors and Actuators, 2002, 95 (2), 259-268.
J. Lee, H. Moon, J. Fowler, T. Schoellhammer, and C.-J. Kim., Electrowetting and electrowetting-on-dielectric for microscale liquid handling, Sensors and Actuators , 2002, 95 (2-3), 259-268.
H. Moon, S. K. Cho, R. L. Garrell, and C.-J. Kim, Low Voltage Electrowetting-On-Dielectric, J. Applied Physics, 2002, 92 (7), 4080-4087.
J.-A. Paik, S.-K. Fan, C.-J. Kim, M. C. Wu, and B. Dunn, Micromachining of Mesoporous Oxide Films for Microelectromechanical System Structures, J. Materials Research, 2002, 17 (8), 2121-2129.