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NEWS

• BioArray News covered Cho's work at UCF
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• MIT Technology Review
  ranked UCF No.44 
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• MEMS diversify and advance
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• Associate Professor
• Director of NanoFab and BioMEMS Lab
• Department of Mechanical, Materials and Aerospace Engineering
  Electrical and Computer Engineering (Joint Appointment)
  P.O. Box 162450
  University of Central Florida, Orlando, FL 32816-2450
• Main Office: 12424 Research Pkwy, Research Pavilion #478
  Orlado, FL 32826
• Campus Office: (407) 823-5014, ENG1-215
  RPV Office:  (407) 207-7245, RPV-478
• Fax: (407) 823-0208
• E-mail:joechomail.ucf.edu
• C.V.

• Dr. Cho earned his doctoral degree in electrical engineering (specialty: MEMS and BioMEMS) from the University of Cincinnati in 2002. He received his B.S. and M.S. degrees in Materials Science and Engineering from Seoul National University, Korea in 1989 and 1991, respectively. He was with KETI (Korea Electronics Technology Institute) from 1993 to 1997 as a research engineer. He is a NSF CAREER awardee of 2004.

• Course: EAS4700C, EGN4412C Fall 2007, 7:30-10:20 T Th HPA119 (Current)
• Course: EML6299 Advanced Topics in Miniaturization , Spring 2007, 6:00-7:15 M W BA216
• Course: EML4005 Design in Nature and Engineering, Spring 2006, 12:30-1:20 M W F ENG383
• Course: EML 5291 MEMS Materials, Spring 2006, 6:30-7:45 T Th ENG388
• Course: EMA3124
  Design and Selection of Materials, Fall 2005, 4:30-5:45 T Th, CL
• Course: EML 6299 Advanced Topics in Miniaturization (17187) Spring 2005, 12:00-1:15 T Th ENG384
• Course: EMA 3124
  Design and Selection of Materials, Fall 2004, 6:00-7:15 MW
  Syllabus
• Course :EML 5291 MEMS Materials
  Spring 2004, 6:00-8:50 Th
  Syllabus
• Course: EMA 3124 Design and Selection of Materials
  Fall 2003, 6:00-7:15 MW
• Course :EMA 5937 Materials for MEMS  Spring 2003, 1:00-2:15 MW
• BioMEMS - micro TAS, Lab-on-a-chip
• EcoMEMS- environmental monitoring microsystems
• Microfluidic system - valve, pump and dispenser
• MOEMS (Micro-Opto-Electro-Mechanical-Systems) - mirrors and switches
• Magnetic MEMS - magnetic sensor and actuator
• MEMS fundamentals- UV-LIGA, electroplating and packaging.
• Nanofabrication
• Polymer micromachining
• Multi-layered electroceramic components

Funded Projects

NSF-NUE (Nanotechnology Undergraduate Education): Preparing Undergraduates for Careers in Nanotechnology
Source: National Science Foundation
Duration: 2008-2010
Amount: 200K

NSF-REU: Small-Scale Engineering (Co-PI, PI: Dr. R. Kumar)
Source: National Science Foundation
Duration: 2007-2009
Amount: 280K

NSF-MRI: Acquisition of NIL (nanoimprint) System
Source: National Science Foundation
Duration: 2005-2008
Amount: 200K

NSF-CAREER: A Micro SPR (Surface Plasmon Resonance) Sensor
Source: National Science Foundation
Duration: 2004-2009
Amount:400K

Nano-particles/tubes Integrated MEMS Device for Point Contact Highly Sensitive Hydrogen Sensor  (Co-PI, PI: Dr. S. Seal)
Source:ASRC
Duration: 2005-
Amount: 174K

Highly Selective Nano-MEMS Low Temperature Hydrogen Sensor (Co-PI,  PI: Dr. Seal)
Source: Florida Solar Energy Center
Duration: 2005
Amount: 160K

A Needle-type Nanomaterial-integrated Biochemical Sensor for In-situ Plant Physiology Monitoring
Source: Space Research Initiative
Duration: 2005
Amount: 130K

Development of a disposable microbial sensor for water quality monitoring based on a generic biosensor platform
Source: NASA-UF Space Biotechnology and Commercial Applications Program
Duration: 2003-2004
Amount: 94K

Mentor for summer REU/RET 2004-2007

 

• P. Zhang, G. Londe, J. Sung, E. Johnson, M. Lee and H. J. Cho, “Microlens Fabrication Using an Etched Glass Master”, Microsystem Technologies, Microsystem Technologies, pp. 339-342, Vol. 13, No. 3-4, 2007

• M. Pepper, N. S. Palsandram, P. Zhang, M. Lee and H. J. Cho, “Interconnecting Fluidic Packages and Interfaces for Micromachined Sensors”, Sensors and Actuators A, pp. 278-285, Vol. 134, 2007

• A. Mehta, S. Patil, H. Bang, H. J. Cho, S. Seal, “A novel multivalent nanomaterial based hydrogen peroxide sensor “, Sensors and Actuators A, pp. 146-151, Vol. 134, 2007
• 3. S. Deshpande, S. Seal, P. Zhang, H. J. Cho, N. Posey, “Electrode architecture in tuning room temperature sensing kinetics of nanomicrointegrated hydrogen sensor”, Appl. Phys. Lett.,  073118 (3 pages), Vol.90, 2007
• S. Shukla, P. Zhang, H. J. Cho, S.Seal and L.Ludwig, “Room Temperature Hydrogen Response Kinetics of Nano–micro-integrated doped Tin Oxide Sensor”, Sensors and Actuators B, pp. 573-583, Vol. 120, 2007
• A. Mehta, H. Shekhar, S. H. Hyun, S. Hong, H. J. Cho, “A Micromachined Electrochemical Sensor for Free Chlorine Monitoring in Drinking Water”, Water Science and Technology, pp.403-410,  Vol. 53, No. 4-5, 2006
• S. Shukla, P. Zhang, H. J. Cho, Z. Rahman, C. Drake, S. Seal, V. Craciun, and L. Ludwig, “Hydrogen-discriminating nanocrystalline doped-tin-oxide room-temperature microsensor”, J. Appl. Phys., pp. 104306-104315,Vol. 98, Issue 10,  2005
• S. Shukla, L. Ludwig, H. J. Cho, J. Duarte, and S. Seal, “Effect of Air-Pressure on Room Temperature Hydrogen Sensing Characteristics of Nanocrystalline Doped-Tin Oxide MEMS-Based Sensor”, J. Nanosci. Nanotech, pp. 1864-1874, Vol. 5, No. 11, 2005
• S. Shukla, E. Brinley, H. J. Cho, S. Seal, “Electrospinning of hydroxypropyl cellulose fibers and their application in synthesis of nano and submicron tin oxide fibers”, Polymer, Vol. 46, No. 26, pp.12130-12145, 2005
• S. Shukla, R. Agrawal, H. J. Cho, S. Seal, L. Ludwig, and C. Parish, “Effect of ultraviolet radiation exposure on room-temperature hydrogen sensitivity of nanocrystalline doped tin oxide sensor incorporated into microelectromechanical systems device”, J. Appl. Phys. Vol. 97, Issue 5, pp.054307-054319, 2005
• J. Yan, S. T. Kowel, H. J. Cho, C. H. Ahn, G. P. Nordin and J. H. Kulick, "Autostereoscopic 3D display based on micromirror array", Applied Optics, pp. 3686-3696, Vol. 43, No. 13, 2004.
• H. J. Cho and C. H. Ahn, "Magnetically-driven bi-directional optical microscanner ", Journal of  Micromechanics and Microengineering, pp. 383-389, Vol. 13, No.3, 2003. 
• H. J. Cho and C. H. Ahn, "Microscale Resin-bonded Permanent Magents for Magnetic MEMS Applications", Journal of Applied Physics, pp.8674-8676, Vol. 93, No. 10, 2003.  
• H. J. Cho and C. H. Ahn, "A Bi-directional Magnetic Microactuator Using Electroplated Permanent Magnet Arrays", ASME/IEEE Journal of Microelectromechanical Systems (JMEMS), pp. 78-84, Vol. 11, No. 1, 2002. 
• H. J. Cho, K. W. Oh, C. H. Ahn, P. Boolchand, and T.-C. Nam, "Stress analysis of silicon membranes with electroplated permalloy films using Raman scattering", IEEE Transactions on Magnetics, Vol. 37, No. 4, pp. 2749-2751, 2001.
• J. Yan, S. T. Kowel, H. J. Cho, and C. H. Ahn, "Real-time full-color three-dimensional display using a micromirror array", Optics Letters, Vol. 26, No. 14, pp. 1075-1077, 2001.
• H. J. Cho, S. Bhansali and C. H. Ahn, "Electroplated Thick Permanent Magnet Arrays with Controlled Direction of Magnetization for MEMS Application", Journal of Applied Physics, Vol. 87, No. 9, pp. 6340-6342, 2000.
  

• G. Londe, A. Wesser, H. J. Cho, L. Zhai, A. Chunder and S. Subbarao, "A Passive Microfluidic Valve Using Superhydrophobic/hydrophilic Nanostructures for Lab-on-a-chip (LOC) Systems", Proc. The 14th International Conference on Solid-state Sensors, Actuators and Microsystems (Transducers '07), Lyon, France, June 10-14, 2007, pp. 1801-1804.
• H. Pang, P. Likamwa and _H. J. Cho, “A Micro SPR (Surface Plasmon
  Resonance) Sensor with an Integrated Photodetector”, Proc. International Conference on Micro Total Analysis Systems (micro-TAS 2006), Tokyo,
  Japan,. November 5-9, 2006, pp. 1312-1324 .
• P. Zhang, S. Desphande, S. Seal, H. J. Cho and P. J. Medelius “Fast
  Detection of Hydrogen at Room Temperature Using a
  Nanoparticle-integrated Microsensor”, Proc. The 5th International
  Conference on Sensors (IEEE SENSORS 2006), Daegu, Korea, October 22-25, 2006, pp. 712-715.
• H. Pang, P. Likamwa and H. J. Cho, “Integrated Optical Sensor
  Platform based on Evanescent Field Coupling for Biochemical Sensor
  Applications”, Proc. The 5th International Conference on Sensors (IEEE
  SENSORS 2006), Daegu, Korea, October 22-25, 2006, pp. 1489-1492.
• N. S. Palsandram, P. Zhang, M. Pepper, M. Lee and H. J. Cho, “Interconnecting Microfluidic Package and Hybrid Interface for Chip-based Sensor”, Proceedings of IMECE 2005: 2005 ASME International Mechanical Engineering Congress and Exposition, Orlando, Florida, November 5-11, 2005, IMECE2005-82031, pp.1-5
• P. Zhang, S, Shukla, L. Ludwig, H. J. Cho and S. Seal, “A Room Temperature Hydrogen Sensor with High Sensitivity and Selectivity Using Nanocrystalline Semiconductor Particles”, Proceedings of IMECE 2005: 2005 ASME International Mechanical Engineering Congress and Exposition, Orlando, Florida, November 5-11, 2005, IMECE2005-82357, pp.1-5
• S. Patil, A. Mehta, H. Bang, H. J. Cho and S. Seal, “A Novel Nanomaterial Based Electrochemical Sensor for Free Radical Detection”, Proceedings of IMECE 2005: 2005 ASME International Mechanical Engineering Congress and Exposition, Orlando, Florida, November 5-11, 2005, IMECE2005-82094, pp. 1-5
• P. Zhang, G. Londe, J. Sung, E. Johnson and H. J. Cho, “Microlens Fabrication Using an Etched Glass Mater”, Book of Abstract, The 6th International Workshop on High Aspect Ratio Micro Structure Technology (HARMST 2005), Gyeongju, Korea, June 10-13, 2005, pp.246-247
• A. Mehta, H. Shekhar, S. H. Hyun, S. Hong and H. J. Cho, "A Disposable Microsensor for Monitorning Free Chlorine in Water", Proc. The 2nd International Water Association Conference on Instrumentation, Control and Automation (ICA 2005), Busan, Korea, May 29-June 2, 2005, pp. 173-182
• A. Rajnikant, S. Shukla, L. Ludwig, M. Anjum, H. J. Cho and S. Seal, "A Nanoparticle-based Microsensor for Room Temperature Hydrogen Detection", Proc. The 3rd International Conference on Sensors (IEEE SENSORS 2004), Vienna, Austria, Oct. 24-27, 2004, pp. 395-398
• M. Anjum, H. Shekhar, S. Hyun, and H. J. Cho, "A Disposable BOD Microsensor Using a Polymer Substrate", Proc. The 3rd International Conference on Sensors (IEEE SENSORS 2004), Vienna, Austria, Oct. 24-27, 2004, pp.1202-1205
• V. Sundaram, H. Bang, and H. J. Cho, "A DEP(dielectrophoresis) Manipulator for Bead-based Assay Using Transparent ITO Electrodes", The 3rd International Conference on Sensors (IEEE SENSORS 2004), Vienna, Austria, Oct. 24-27, 2004 pp. 931-934
• M. Anjum, H. Shekhar, S. Hyun, and H. J. Cho, "A Disposable Microbial Sensor for Rapid BOD Measurement", The 8th International Conference on Miniaturised Systems for Chemistry and Life Scicence (micro-TAS 2004), Malmo, Sweden, Sept. 26-30, 2004, pp. 306-308
• H. Shekhar, V.Chathapuram, S. H. Hyun, S. Hong and H. J. Cho, "A Disposable Microsensor for Continuous Monitoring of Free Chlorine in Water", Proc. The 2nd IEEE international conference on sensors (IEEE SENSORS 2003), Toronto, Canada, October 22-24, 2003, pp.67-70
• J. Yan, S. T. Kowel, H. J. Cho, and C. H. Ahn, “Micromirror-based 3D Display System and Its Defense Applications”, Proc. SPIE Vol. 5080, 17th Annual International Symposium on Aerospace/Defense Sensing, Simulation, and Controls (AeroSense), Orlando, FL, April 21-25, 2003, pp.158-165
• H. J. Cho and C. H. Ahn "Microscale Resin-bonded Permanent Magnets for Magnetic MEMS Applications",  4th Annual Conference on Magnetism and Magnetic Materials, Tampa, FL, November 11-15, 2002
• C. H. Ahn, S. Kim, H. J. Cho, S. Murugesan and G. Beaucage, "Surface Modification of Cyclic Olefin Copolymers for Bio-MEMS Microfluidic Devices", MRS Spring Meeting, San Francisco, CA, April 1-5, 2002
• H. J. Cho and C. H. Ahn, "Micromachined Resin Bonded Permanent Magnet Arrays Using a Bumper Filling Technique", Proc. 46th Annual Conference on Magnetism and Magnetic Materials, Seattle, WA, Nov. 12-16, 2001, p.389
• T. R. Butt, H. Tran, J.-W. Choi, H. J. Cho and C. H. Ahn, "A Disposable Cell-Based Biochip for Detection of Hormones and Drugs", Proceedings of the 5th International Conference on Micro Total Analysis Systems (micro-TAS 2001), Monterey, CA, Oct. 21-25, 2001, pp. 83-84.
• J.-W. Choi, S. Kim, R.Trichur, H. J. Cho, A. Puntambekar, R. L. Cole, J. R. Simkins, S. Murugesan, K. S. Kim, J. B. Lee, G. Beaucage, J. H. Nevin, and C. H. Ahn, "A Plastic Micro Injection Molding Technique Using Replaceable Mold-Disks for Disposable Microfluidic Systems and Biochips", Proceedings of the 5th International Conference on Micro Total Analysis Systems (micro-TAS 2001), Monterey, CA, Oct. 21-25, 2001, pp. 411-412. 
• A. Puntambekar, H. J. Cho, C.-C. Hong, J.-W Choi, C. H. Ahn, S. Kim,  and V.B. Makhijani, "A New Fixed-Volume Metering Microdispenser Module Based on sPROMs technology", Technical Digest of the 11th International Conference in Solid-State Sensors and Actuators (Transducers '01), Munich, Germany, June 10-14, 2001, pp. 1240-1243.
• H. J. Cho, K. W. Oh, C. H. Ahn, P. Boolchand, and T.-C. Nam, “Stress analysis of silicon membranes with electroplated permalloy films using Raman spectroscopy”,The 8th Joint MMM-Intermag Conference, San Antonio, 2001, p.463 
• H. J. Cho, and C. H. Ahn, "Electroplated Co-Ni-Mn-P-Based Hard Magnetic Arrays and Their Applications to Microactuators", The 6th International Symposium: Magnetic Materials, Processes and Devices, Proceedings Volume PV 2000-29, The Electrochemical Society, 2001, pp. 495-505. 
• H. J. Cho and C. H. Ahn, “Patterning of magnetic beads with electroplated thick magnet arrays for biomems applications”, The 8th Joint MM-Intermag Conference, San Antonio, 2001, p.523
• J. Yan, S. T. Kowel, H. J. Cho, and C. H. Ahn, "Micromirror Arrays for Stereoscopic 3D displays", Society of Information Display Symposium '01,  2001, San Jose, CA
• C. H. Ahn, A. Puntambekar, S. M. Lee, H. J. Cho and C.-C. Hong, "Structurally Programmable Microfluidic Systems", Proceedings of the 4th International Conference on Micro-Total Analysis Systems (u-TAS 2000), Enschede, The Netherlands, 2000, pp. 323-326.
• H. J. Cho, J. Yan, S. T. Kowel, Fred R. Beyette, Jr., and C. H. Ahn, “A scanning micromirror using a bi-directionally movable magnetic microactuator”, Proc. SPIE, MOEMS and Miniaturized Systems, Santa Clara, 2000, pp. 106-115
• A. Puntambekar, S. M. Lee, H. J. Cho, and Chong H. Ahn , "On- Chip Microfluidic Multiplexers For Biochemical Reactors And Mixers" World Congress on Biomedical engineering, July 2000, Chicago
• H. J. Cho and Chong H. Ahn, “A Novel Bi-Directional Magnetic Microactuator Using Electroplated Permanent Magnet Arrays with Vertical Anisotropy”, Proc. IEEE MEMS 2000, Miyazaki, Japan, 2000, pp. 686-691
• H. J. Cho, S. Bhansali, and C. H. Ahn, “Electroplated Thick Magnet Arrays with Controlled Magnetization for MEMS Application”, 44th Annual Conference on Magnetism and Magnetic Materials, San Jose, 1999, p.271 

• Senior Research Associate (April 2002-June 2002), Microsystems and BioMEMS Lab University of Cincinnati, OH
• Graduate Research Assistant (August 1998-March 2002),Microsystems and BioMEMS Lab University of Cincinnati, OH
• Involved Projects
  Plastic-Based Structurally Programmable Microfluidic Biochips for Clinical Diagnostics (July 2000 - June 2003) granted from DARPA, DoD.
  A Novel Bi-Directionally Actuated Magnetic Microactuator for Fuel/Air Control and Regulation (2000) granted from NASA-Glenn Microsystem Initiative
  A Generic Microfluidic Biochemical Detection System for Remote Sensors (April 1997 - September 2000) granted from DARPA, DoD.
• Research Engineer (March 1993-August 1997), KETI (Korea Electronics Technology Institute)
• Research Assistant (July 1992-February 1993), KITECH (Korea Institute of Industrial Technology)
• Involved Projects
  Development of Nonlinear Optical Materials(1992)
  Failure Analysis of Automobile Oxygen Sensors(1993)
  Development of Piezoelectric Ceramic Filters(1994)
  Development of Multilayered Chip Inductors(1995-97)

• Journal Referee - Journal of Micromechanics and Microengineering, Institute of Physics, Sensors and Actuators, IEEE/ASME Trans. on Mechatronics, IEEE Sensors   
• Committee Chair - Award Committee, MMAE, UCF, 2006-2007
• Committee Member - Undergrad Curriculum and Performance Committee, MMAE, UCF
• Member - IEEE, ASME

• NSF CAREER AWARD* (2004) - Electrical and Communications Systems Division, National Science Foundation
  *Formerly known as NSF Young Investigator Award
• Departmental Conference Travel Award - 46th Annual Conference on Magnetism and Magnetic Materials, Seattle, WA  (2001)
• Conference Travel Award - IEEE MEMS 2000, Miyazaki, Japan (2000)
• Departmental Conference Travel Award - 44th Annual Conference on Magnetism and Magnetic Materials, San Jose, CA (1999)
• Outstanding Research Award presented by KETI, Korea (1994)
• The following paper was acknowledged by IOP Select* (2003)
  H. J. Cho and C. H. Ahn, "Magnetically-driven bi-directional optical microscanner ", Journal of  Micromechanics and Microengineering, pp. 383-389, Vol. 13, No.3, 2003.
  * IOP Select reflects both the breadth and international significance of papers published in the peer reviewed journals by Institute of Physics.