Faculty Profile

Dr. Chang-Hwan Choi

ASSOCIATE PROFESSOR
Room: C205
Phone: 201.216.5579
Fax: 201.216.8315
Email: cchoi@stevens.edu
Website
School:  Schaefer School of Engineering & Science
Department:  Mechanical Engineering
Program:  Nanotechnology / Mechanical Engineering
Laboratory:  Nano and Microfluidics Laboratory
Education
  • Ph.D., Department of Mechanical and Aerospace Engineering (Concentration in MEMS/Nanotechnology), University of California at Los Angeles (UCLA), 2006
  • M.S., Division of Engineering (Concentration in Fluids, Thermal, and Chemical Processes), Brown University, 2002
  • M.S., Department of Aerospace Engineering, Seoul National University (Korea), 1997
  • B.S. (Magna cum Laude, with Honors), Department of Aerospace Engineering, Seoul National University (Korea), 1995
Research
  • Large-area 3-D nanopatterning and nanostructure fabrication
  • Multifunctional superhydrophobic nanostructured materials
  • Multiscale fluid physics and heat transfer on nanostructured surface
  • Microfluidic self-assembly of nanomaterials
  • Nanofluidic energy harvesting
  • Optofluidic waveguide and sensor
Experience
  • Associate Professor, Department of Mechanical Engineering, Stevens Institute of Technology, September 2013 - present
  • Assistant Professor, Department of Mechanical Engineering, Stevens Institute of Technology, January 2007 - August 2013
  • Researcher, Satellite Division, Korea Aerospace Research Institute (Korea), December 1999 - June 2000
  • Lecturer, Foreign Language Department, Chandrakasem Rajabhat University (Thailand), March 1997 - November 1999
  • Assistant Researcher, Satellite Division, Korea Aerospace Research Institute (Korea), February 1996 - December 1996
Institutional Service
  • Organizer: 1st Stevens ME Dept. MEMS/NEMS Student Meeting (October 19, 2007)
  • Coordinator: Workshops on Biomaterials Sciences and Engineering (2007-2008)
  • Technical Program Committee: The 1st Metro Area MEMS/NEMS Workshop (July 23, 2007)
  • Session Chair: 4th Annual DMI/ME Research Conference (May 16-17, 2007)
Professional Service
  • Reviewer (Journal): Applied Materials & Interface, Applied Surface Science, Biomaterials, IEEE Spectrum, Journal of Fluids Engineering, Journal of Microelectromechanical Systems, Journal of Micromechanics and Microengineering, Lab on a Chip, Langmuir, Microfluidics and Nanofluidics,  Nanotechnology, Philosophical Transactions, Physical Review E, Physical Review Letters, Physics of Fluids 
  •  Reviewer (Conference Proceedings): ASME ICNMM, ASME IMECE, European Conference on Microfluidics
  •  Reviewer (Grant Proposal): The City University of New York Internal Research Award Program, US National Science Foundation, Swiss National Science Foundation
Honors & Awards
  • NSF Fellowship, National Science Foundation (Summer Institute on Nano Mechanics and Materials), 2007 
  • KUSCO/KSEA Scholarship, Korea-U.S. Science Cooperation Center/Korean-American Scientists and Engineers Association, 2006
  • Graduate Fellowship, California NanoSystems Institute, 2002
  • Engineering Research Fellowship, Brown University, 2000
  • National Fellowship, Korean Government, 2000
  • 'Magna cum laude' Honors, Seoul National University, 1995
Professional Societies
  • Member, American Society of Mechanical Engineers (ASME), 2005 - present
  • Member, Institute of Electrical and Electronic Engineers (IEEE), 2005 - present
  • Member, Korean-American Scientists and Engineers Association (KSEA), 2005 - present
Selected Publications
Conference Proceedings
  1. R. Leeladhar, W. Xu, C.-H. Choi. "Effects of Nanofluids on Droplet Evaporation and Wetting on Nanoporous Superhydrophobic Surfaces", in Proceedings of ASME MNHMT, December 18-22, 2009, Shanghai, China. .
  2. W. Xu, C.-H. Choi. "Effects of Structural Topography on Nanofluids Droplet Evaporation on Multifarious Superhydrophobic Surfaces", in Proceedings of ASME MNHMT, December 18-22, 2009, Shanghai, China. .
  3. I. Wathuthanthri, C.-H. Choi. "Tunable Lloyd-Mirror Interferometer for Large-Area Nanopatterning", in Proceedings of ASME IMECE, November 15-19, 2009, Orlando, FL, USA.
  4. R. Leeladhar, W. Xu, C.-H. Choi. "Evaporation of Nanoparticles Droplets on Nano-Porous Superhydrophobic Surfaces", in Proceedings of ASME IMECE, November 15-19, 2009, Orlando, FL, USA. .
  5. W. Xu, C.-H. Choi. "Nanofluids Evaporation Kinetics on Microstructured Superhydrophobic Surfaces", in Proceedings of ASME IMECE, November 15-19, 2009, Orlando, FL, USA. .
  6. R. Leeladhar, W. Xu, Y.-T. Tsai, E.-H. Yang, C.-H. Choi. "Nanowire Self-Assembly in Droplet Evaporation on Superhydrophobic Surfaces", in Proceedings of the 13th International Conference on Miniaturized Systems for Chemistry and Life Sciences (MicroTAS 2009), November 1-5, 2009, Jeju, Korea. .
  7. W. Xu, C.-H. Choi. "Evaporation Kinetics of Nanofluid Droplets on Superhydrophobic Surfaces", in Proceedings of the 13th International Conference on Miniaturized Systems for Chemistry and Life Sciences (MicroTAS 2009), November 1-5, 2009, Jeju, Korea. .
  8. C.-H. Choi, C.-J. Kim. "Cell Growth on Three-Dimensional Sharp-Tip Nanostructures of Hydrophilic and Hydrophobic Surfaces", in Proceedings of the 13th International Conference on Miniaturized Systems for Chemistry and Life Sciences (MicroTAS 2009), November 1-5, 2009, Jeju, Korea. .
  9. C.-H. Choi, C.-J. Kim. "Nanostructured surfaces for anti-biofouling/anti-microbial applications", in Proceedings of the SPIE Defense, Security, and Sensing, April 13-17, 2009, Orlando, FL, USA.
  10. Y.-T. Tsai, W. Xu, E.-H. Yang, C.-H. Choi. "Interfacial-Tension-Directed Self-Assembly of Nanowires on a Superhydrophobic Surface", in Proceedings of ASME IMECE, November 2-6, 2008, Boston, MA, USA. .
  11. C. Lee, C.-H. Choi, C.-J. Kim. "Effect of Geometric Parameters of Superhydrophobic Surface on Liquid Slip", in Proceedings of ASME IMECE, November 2-6, 2008, Boston, MA, USA. .
  12. C.-H. Choi, C.-J. Kim. "Droplet Evaporation in Nanostructured Superhydrophobic Surfaces", in Proceedings of the 12th International Conference on Miniaturized Systems for Chemistry and Life Sciences (MicroTAS 2008), October 12-16, 2008, San Diego, CA, USA. .
  13. C.-H. Choi, S. H. Hagvall, J. C. Y. Dunn, B. M. Wu, C.-J. Kim. "Cell Adhesions on NanoTurf Surfaces", Proceedings of MEMS 2006: The 19th International Conference on Micro Electro Mechanical Systems . January 22-26, 2006, Istanbul, Turkey.
  14. C.-H. Choi, C.-J. Kim. "Measurement of Liquid Slip on NanoTurf Surfaces", Proceedings of NANO2005 Integrated Nanosystems: Design, Synthesis and Applications . September 14-16, 2005, University of California, Berkeley, CA, USA.
  15. C.-H. Choi, C.-J. Kim. "Control of Sidewall Profile of Silicon Nanostructures in Bosch Process and Its Use for Sharp Tip Fabrication", Proceedings of UKC2005: The 2005 US-Korea Conference on Science, Technology, & Enterpreneurship. August 11-13, 2005, Irvine, CA, USA.
  16. C.-H. Choi, C.-J. Kim. "Fabrication of Silicon Nanostructures with Various Side Wall Profiles and Sharp Tips", Proceedings of Transducers’05: The 13th International Conference on Solid-State Sensors, Actuators and Microsystems. June 5-9, 2005, Seoul, Korea.
  17. C.-J. Kim, C.-H. Choi. "Nano-engineered Low Friction Surface for Liquid Flow", Proceedings of the 6th KSME-JSME Thermal and Fluids Engineering Conference. March 20-23, 2005, Jeju, Korea.
  18. C.-H. Choi, J. Kim, C.-J. Kim. "NanoTurf Surfaces for Reduction of Liquid Flow Drag in Microchannels", Proceedings of NANO2004 Integrated Nanosystems: Design, Synthesis and Applications. September 22-24, 2004, Pasadena, CA, USA.
  19. C.-H. Choi, K. J. A. Westin, K. S. Breuer. "To Slip or Not to Slip: Water Flows in Hydrophilic and Hydrophobic Microchannels", Proceedings of ASME IMECE. November 2002, New Orleans, LA, USA.
  20. K. J. A. Westin, C.-H. Choi, P. Huang, Z. Cao, K. S. Breuer, B. Caswell, P. Richardson, M. Sibulkin. "Liquid Transport Properties in Submicron Channel Flows", Proceedings of ASME IMECE. November 2001, New York, NY, USA.
  21. K. J. A. Westin, C.-H. Choi, K. S. Breuer. "Rheological Shear Experiments in Micron Scale Geometries", Proceedings of the 5th International Conference on Micro Total Analysis Systems (MicroTAS2001). October 2001, Monterey, CA, USA.
Books
  1. C.-H. Choi, C.-J. Kim. "Design, Fabrication, and Applications of Large-Area Well-Ordered Dense-Array Three-Dimensional Nanostructures", Nanostructures in Electronics and Photonics, Faiz Rahman, Pan Stanford Publishing. (2008) (invited).  Link  .
TV/Video/Radio
  1. C.-H. Choi, C.-J. Kim. "Novel method simplifies large-scale nanofabrication process", (2006).  Nanowerk  .
  2. C.-H. Choi, C.-J. Kim. "Weniger Reibung durch spitze Nadeln", (2006).  Deutschlandfunk: German National Public Radio  .
Journals
  1. C.-H. Choi, C.-J. Kim. "Droplet Evaporation of Pure Water and Protein Solution on Nanostructured Superhydrophobic Surfaces of Varying Heights", Langmuir 25, 7561-7567 (2009).  Link  .
  2. K. Schenke-Layland, F. Rofail, S. Heydarkhan, J. M. Gluck, N. P. Ingle, E. Angelis, C.-H. Choi, W. R. MacLellan, R. E Beygui, R. J. Shemin, S. Heydarkhan-Hagvall. (2009). "The use of three-dimensional nanostructures to instruct cells to produce extracellular matrix for regenerative medicine strategies", Biomaterials 30. 4665-4675 .  Link  .
  3. C.-H. Choi, S. H. Hagvall, B. M. Wu, J. C. Y. Dunn, R. E. Beygui, C.-J. Kim. "Cell Growth as a Sheet on Three-Dimensional Sharp-Tip Nanostructures", Journal of Biomedical Materials Research 89A, 804-817 (2009).  Link  .
  4. C. Lee, C.-H. Choi, C.-J. Kim. (Jun 2008). "Structured Surfaces for a Giant Liquid Slip", Physical Review Letters 101, 064501 (2008).  Link  .
  5. S. Heydarkhan-Hagvall, C.-H. Choi, J. Dunn, S. Heydarkhan, K. Schenke-Layland, W. R. MacLellan, R. E. Beygui. "Influence of Systematically Varied Nano-Scale Topography on Cell Morphology and Adhesion", Cell Communication & Adhesion 14, 181-194 (2007) .  Link  .
  6. C.-H. Choi, S. H. Hagvall, B. M. Wu, J. C. Y. Dunn, R. E. Beygui, C.-J. Kim. "Cell Interaction with Three-Dimensional Sharp-Tip Nanotopography", Biomaterials 28, 1672-1679 (2007).  Link  .
  7. C.-H. Choi, C.-J. Kim. "Fabrication of Dense Array of Tall Nanostructures over a Large Sample Area with Sidewall Profile and Tip Sharpness Control", Nanotechnology 17, 5326-5333 (2006).  Link  .
  8. C.-H. Choi, C.-J. Kim. "Choi and Kim Reply (A Reply to the Comment on ‘Large Slip of Aqueous Liquid Flow over a Nanoengineered Superhydrophobic Surface’)", Physical Review Letters 97, 109602 (2006) .  Link  .
  9. C.-H. Choi, U. Ulmanella, J. Kim, C.-M. Ho, C.-J. Kim. "Effective Slip and Friction Reduction in Nanograted Superhydrophobic Microchannels", Physics of Fluids 18, 087105 (2006) (also in Virtual Journal of Nanoscale Science & Technology 14(10), September 4, 2006) .  Link  .
  10. C.-H. Choi, C.-J. Kim. "Large Slip of Aqueous Liquid Flow over a Nanoengineered Superhydrophobic Surface", Physical Review Letters 96, 066001 (2006) (also in Virtual Journal of Nanoscale Science & Technology, 13(8), February 27, 2006).  Link  .
  11. C.-H. Choi, K. J. A. Westin, K. S. Breuer. "Apparent Slip Flows in Hydrophilic and Hydrophobic Microchannels", Physics of Fluids 15, 2897-2902 (2003) .  Link  .
  12. K. J. A. Westin, C.-H. Choi, K. S. Breuer. "A Novel System for Measuring Liquid Flow Rates with Nanoliter per Minute Resolution", Experiments in Fluids 34, 635-642 (2003).  Link  .
Magazine
  1. C.-H. Choi, S. H. Hagvall, B. M. Wu, J. C. Y. Dunn, R. E. Beygui, C.-J. Kim. "The Year in Images",  Biomaterials 2007  .
  2. C.-H. Choi, C.-J. Kim. "Researchers Discover No-slip Condition Does Not Hold at the Nanoscale", (2006).  UCLA Engineer  .
  3. C.-H. Choi, C.-J. Kim. "A Superhydrophobic Surface", (2006).  Physics News Update: The AIP Bulletin of Physics News  .
Courses
  • ME 342 Fluid Mechanics
  • ME 423 Engineering Design VII
  • ME 424 Engineering Design VIII
  • ME 470 Mechanical Engineering Systems Laboratory