School of Mechanical and Advanced Materials Engineering
Jaesung Jang
Assistant Professor / UNIST
School of Mechanical and Advanced Materials Engineering
Assistant Professor / UNISTProfile
Jaesung Jang, Ph.D.
Assistant Professor
School of Mechanical and Advanced Materials Engineering (1st)
School of Nano-Bioscience and Chemical Engineering (2nd)
Ulsan National Institute of Science and Technology (UNIST)
100 Banyeon-ri, Eonyang-eup, Ulju-gun, Ulsan 689-798, S. Korea
Tel: +82-52-217-2323 Fax:+82-52-217-2309
Email: jjang@unist.ac.kr
Research interests
· Aerosols & Bio-Aerosols (collection and detection of airborne bacteria and viruses)
· Resonant Micro-Sensors (Cantilever & QCM Sensors) for Bio-Sensing and Industrial Applications
· Fundamental Microfluidics & Nanofluidics (small scale gas and liquid flows)
· Electrical Airborne or Waterborne Particle Manipulation (collection, separation, and concentration)
· Fluidic-MEMS and Bio-MEMS
· Removal of Biofilms and Bioresidues Using Aerosols
Education
Doctor of Philosophy Purdue University, West Lafayette, IN, 2004
Mechanical Engineering (Advisor: Prof. Steven T. Wereley)
Dissertation title: Gas Flows in Rectangular Microchannels and a Capacitive Micro Flow Sensor Using Differential Pressure
Master of Science POSTECH, 1999
Mechanical Engineering (Advisor: Prof. Seung S. Lee)
Thesis title: Fabrication and Experimental Study of MHD (Magnetohydrodynamic) Micropump
Bachelor of Science POSTECH, 1997
Mechanical Engineering (Minor: Electronic & Electrical Engineering)
Work Experience
Assistant Professor
Microfluidics, Bio-Chips, and Aerosols (MBA) Laboratory
Mechanical and Advanced Materials Engineering,UNIST, Ulsan, 01/2010 – present
Assistant Professor
Mechanical Engineering, Chung-Ang University (CAU), Seoul, 09/2007 – 12/2009
Post Doctoral Research Associate
Laboratory of Integrated Bio Medical Micro/Nanotechnology & Application (Prof. Rashid Bashir)
Electrical and Computer Engineering, Purdue University, West Lafayette, IN, 09/2004 – 08/2007
GraduateAssistant
Microfluidics Lab. (Prof. Steven T. Wereley)
Mechanical Engineering, Purdue University, West Lafayette, IN, 08/2000 – 08/2004
Assistant Researcher
Two-Phase Flow Lab. (Prof. Moo Hwan Kim)
Mechanical Engineering, POSTECH, Pohang, Korea, 03/1999 – 12/1999
Journal Reviews and Courses Taught
– Journal of Micromechanics and Microengineering, Journal of Fluids Engineering – ASME, Journal of Heat and Fluid Flow, Lab on a Chip, Journal of Fluid Mechanics
– UNIST: Advanced Heat Transfer (Graduate), Advanced Fluid Mechanics (Graduate), Aerosol Technology (Graduate), Heat Transfer, Calculus, Introduction to Electrical-Electronic Engineering
– CAU: Computational Fluid Mechanics (Graduate), Introduction to Bio-MEMS (Graduate), Fluid Mechanics and Exercise, Numerical Analysis and Exercise, Introduction to Electrical-Electronic Engineering
3. Study on high frequency electrostatically excited micro-cantilever sensors in conducting ionic liquids
Period: 2010:05:01 – 2013:04:30, Research Fund: 59,670,000 Won/year
PI: Jaesung Jang
Funding Agency: Ministry of Education, Science and Technology
2. A study on micro-cantilever sensors for detecting airborne microorganisms and airborne nanoparticles
Period: 2010:04:01 – 2011:09:30, Research Fund: 40,000,000 Won
PI: Jaesung Jang
Funding Agency: UNIST
1. Optimization of biofilm removal from various surfaces using cryogenic aerosols
Period: 2008:11:01 – 2009:10:30, Research Fund: 48,012,000 Won
PI: Jaesung Jang
Funding Agency: Korea Research Foundation
* Micromechanical Sensors for Virus Detection (Topic of My Postdoctoral Studies)
Period: 2004:08:16 – 2007:07:31, Research Fund: $1.6 Million
PI: Rashid Bashir, Funding Agency: National Institute of Health (NIH) (USA)
* Intelligent MEMS-based Flow Sensors and Controllers (Topic of My Doctoral Studies)
Period: 2000:08:dd – 2002:07:dd, Research Fund: $0.271 Million
PI: Steve Wereley, Funding Agency: Indiana State Government (USA)
Research
Research Interests
· Aerosols & Bio-Aerosols (collection and detection of airborne bacteria and viruses)
(left) Schematic of a particle generation system and the particle collector
(Right) SEM image of Vacciniaviruses from virus suspension before electrospray airborne particle generation, where the insets show the SEM images of two types of single Vaccinia virus particles captured on the electrodes C and E at 2 kV, 1.2 l/min for 30 minutes in the FO configuration. The white scale bars in the insets indicate 500 nm.
Ref:
J. Lee^, J. Jang^, D. Akin, C. A. Savran, R. Bashir, 2008 (Jul.), “Real-time Detection of Airborne Viruses on a Mass-sensitive Device,” Applied Physics Letters, 93, 013901. (^: equal contribution)
J. Jang, D. Akin, R. Bashir, 2008 (Jun.), “Effects of Inlet/Outlet Configurations on the Electrostatic Capture of Airborne Nanoparticles and Viruses,” Measurement Science and Technology, 19, 065204.
J. Jang, D. Akin, K. S. Lim, S. Broyles, M. R. Ladisch, R. Bashir, 2007 (Feb.), “Capture of Airborne Nanoparticles in Swirling Flows Using Non-Uniform Electrostatic Fields for Bio-Sensor Applications,” Sensors and Actuators B: Chemical, 121, pp. 560-566.
· Micro Cantilever & QCM Sensors for Bio-Sensing and Industrial Applications
(Left) SEM image of a single spore on 20 μm length cantilever during air measurements. (Right) a close up SEM image depicting the non-uniformity in size of different spores.
Ref:
K. Park, J. Jang, D. Irimia, J. Sturgis, J. Lee, J. P. Robinson, M. Toner, R. Bashir, 2008 (Jul.), “ ‘Living Cantilever Arrays’ for Characterization of Mass of Single Live Cells in Fluids,” Lab on a Chip, 8, pp. 1034 – 1041.
A. Davila, J. Jang, A. Gupta, T. Walter, A. Aronson, R. Bashir, 2007 (Jun.), “Microresonator Mass Sensors for Detection of Bacillus anthracis Sterne Spores in Air and Water,” Biosensors and Bioelectronics, 22, pp. 3028-3035.
S. Bhattacharya, J. Jang, L. Yang, D. Akin, R. Bashir, 2007 (Mar.), “BioMEMS and Nanotechnology-based Approaches for Rapid Detection of Biological Entities,” Journal of Rapid Methods and Automation in Microbiology, 15, pp. 1-32.
· Fundamental Microfluidics & Nanofluidics (small scale gas and liquidflows)
Schematic of the rectangular microchannel chip using Deep RIE and anodic bonding
Dimensionless velocity vector fields for gaseous slip flow of a rectangular microchannel with non-uniform slip boundary conditions
Ref:
J. Jang, Y.-H. Kim, “Gaseous Slip Flow of a Rectangular Microchannel with Non-Uniform Slip Boundary Conditions,”Microfluidics and Nanofluidics (in press).
J. Jang, S. T. Wereley, 2007 (Feb.), “Gaseous Slip Flow Analysis of a Micromachined Flow Sensor for Ultra Small Flow Applications,” Journal of Micromechanics and Microengineering, 17, pp. 229-237.
J. Jang, S. T. Wereley, 2006 (Mar.), “Effective Heights and Tangential Momentum Accommodation Coefficients of Gaseous Slip Flows in Deep Reactive Ion Etching Rectangular Microchannels,” Journal of Micromechanics and Microengineering, 16, pp. 493-504.
J. Jang, S. T. Wereley, 2004 (Nov.), “Pressure Distributions of Gaseous Slip Flow in Straight and Uniform Rectangular Microchannels,” Microfluidics and Nanofluidics, 1, pp. 41-51.
(Left) Typical micro-PIV set-up and (Right) A micro-PIV image in the rectangular microchannel above and a velocity vector fields computed from the images using Edpiv software
Ref:
S.-Y. Lee, J. Jang, S. T. Wereley, 2008 (Jul.), “Effects of Planar Inlet Plenums on the Hydrodynamically Developing Flows in Rectangular Microchannels of Complementary Aspect Ratios,” Microfluidics and Nanofluidics, 5, pp. 1-12.
S.-Y. Lee, J. Jang, S. T. Wereley, 2005, “Optical Diagnostics to Investigate the Entrance Length in Microchannels,” in The MEMS Handbook, 2nd ed., MEMS: Design and Fabrication, ed. Mohamed Gad-el-Hak, CRC Press.
S.-Y. Lee, J. Jang, Y.-H. Kim, S. T. Wereley, “Recent Developments in Micro Particle Image Velocimetry,” (to be published soon).
· Electrical Airborne or Waterborne Particle Manipulation (collection, separation, and concentration)
Picture of E coli cells captured by dielectrophoretic forces on silicon electrodes
where the white dots shows the cells.
Picture of nanoparticles captured by electrostatic forces on silicon chips where the white dots shows
the particles.
Ref:
K. Park, J. Jang, D. Irimia, J. Sturgis, J. Lee, J. P. Robinson, M. Toner, R. Bashir, 2008 (Jul.), “ ‘Living Cantilever Arrays’ for Characterization of Mass of Single Live Cells in Fluids,” Lab on a Chip, 8, pp. 1034 – 1041.
J. Jang, D. Akin, R. Bashir, 2008 (Jun.), “Effects of Inlet/Outlet Configurations on the Electrostatic Capture of Airborne Nanoparticles and Viruses,” Measurement Science and Technology, 19, 065204.
J. Jang, D. Akin, K. S. Lim, S. Broyles, M. R. Ladisch, R. Bashir, 2007 (Feb.), “Capture of Airborne Nanoparticles in Swirling Flows Using Non-Uniform Electrostatic Fields for Bio-Sensor Applications,” Sensors and Actuators B: Chemical, 121, pp. 560-566.
· Fluidic-MEMS and Bio-MEMS
Structure and operational principle of the flow sensors using two capacitve pressure membranes
Ref:
J. Jang, S. T. Wereley, 2007 (Feb.), “Gaseous Slip Flow Analysis of a Micromachined Flow Sensor for Ultra Small Flow Applications,” Journal of Micromechanics and Microengineering, 17, pp. 229-237.
J. Jang, S. S. Lee, 2000 (Mar.), “Theoretical and Experimental Study of MHD (Magnetohydrodynamic) Micropump,” Sensors and Actuators A: Physical, 80, pp. 84-89.
· Removal of Biofilms and Bioresidues Using Aerosols
Schematic of CO2 aerosol cleaning of particles on a surface (Yang et al., 2007, Sensors & Actuators A)
Both solid CO2 and gas CO2 impacted the particles attached on the surface to get them off the surface.
SEM pictures of E. colicells before and after the CO2aerosol cleaning, where 5ul of cells were dropped and grown in a medium for 72 hours before and after applying the aerosols.
Ref:
M.-Y. Kang, H.-W. Jeong, J. Kim, J.-W. Lee, J. Jang, 2010 (Nov.), “Removal of Biofilms Using Carbon Dioxide Aerosols,” Journal of Aerosol Science, 41, pp. 1044-1051.
Research Equipment
1. Airborne particle counter (Grimm 5412)
2. Airborne particle sizer (Grimm 1109)
3. Electrospray aerosol generator (TSI 3480)
4. Biological safety cabinet (BSL2, Baker SG-603A)
5. Fluorescent microscope (Nikon 80i)
6. Interline CCD camera (CoolSNAP HQ2)
7. Function generator (Agilent)
8. Digital multimeter (Agilent)
9. Oscilloscope (Agilent)
10. Autoclave
11. Multifunction centrifuger
12. UV sterilizer
13. Convection oven
14. Incubator & Shaking incubator
15. Single point laser vibrometer (Polytec)
16. Critical point dryer (SPI)
17. CO2 aerosol cleaning unit (K6-10DG, Applied Surface Technologies)
* UNIST microfabrication center
Publication
Book Chapters
S.-Y. Lee, J. Jang, Y.-H. Kim, S. T. Wereley, 2011, “Recent Developments in Micro Particle Image Velocimetry,” in The Microfluidics and Nanofluidics Handbook: Fabrication, Implementation, and Applications, ed. Sushanta K. Mitra and Suman Chakraborty, CRC Press.
S.-Y. Lee, J. Jang, S. T. Wereley, 2005, “Optical Diagnostics to Investigate the Entrance Length in Microchannels,” in The MEMS Handbook, 2nd ed., MEMS: Design and Fabrication, ed. Mohamed Gad-el-Hak, CRC Press.
List of International Journal Papers
Underlined author(s): corresponding author(s)
17. M. Dwidar^, S. Hong^, M. Cha, J. Jang, R. J. Mitchell, 2012 (.) “Combined action of Bdellovibrio and CO2 aerosol for E.coli biofilm removal from silicon chips.” (in preparation) (^: equal contribution)
16. M. Cha^, S. Hong^, M.-Y. Kang, J.-W. Lee, J. Jang, 2012 (.) “Gas-Phase Removal of Fresh and Old Biofilms from Various Surfaces Using Carbon Dioxide Aerosols.” Biofouling. (in review) (^: equal contribution)
15. T.-W. Lee, H.-S. Kim, T.-H. Tran, J. Jang, D. S. Yoon, J.-H. Kim, E.-K. Kim, Y.-M. Koo, S. W. Lee, W.-J. Chang, 2012 (.) “Diffusion-based Multi-stream Bioluminescent Reaction in a Microfluidic Device,” Chemical Engineering Journal. (accepted)
14. J. W. Lee, S. H. Lee, J. Jang, 2012 (.), “Numerical Analysis on the Electrostatic Capture of Airborne Nanoparticles and Viruses in a Homemade Particle Concentrator without a Unipolar Charger,” Journal of Electrostatics. (accepted)
13. M.-Y. Kang, H.-W. Jeong, J. Kim, J.-W. Lee, J. Jang, 2010 (Nov.), “Removal of Biofilms Using Carbon Dioxide Aerosols,” Journal of Aerosol Science, 41, pp. 1044-1051.
12. J. Jang, Y.-H. Kim, 2010 (Aug.), “Gaseous Slip Flow of a Rectangular Microchannel with Non-Uniform Slip Boundary Conditions,” Microfluidics and Nanofluidics,9, pp. 513-522.
11. J. Lee^, J. Jang^, D. Akin, C. A. Savran, R. Bashir, 2008 (Jul.),“Real-time Detection of Airborne Viruses on a Mass-sensitive Device,” Applied Physics Letters, 93, 013901. (^: equal contribution)
10. K. Park, J. Jang, D. Irimia, J. Sturgis, J. Lee, J. P. Robinson, M. Toner, R. Bashir, 2008 (Jul.), “ ‘Living Cantilever Arrays’ for Characterization of Mass of Single Live Cells in Fluids,” Lab on a Chip, 8, pp. 1034 – 1041. (cover article and selected as a Hot Article for the RSC website)
9. S.-Y. Lee, J. Jang, S. T. Wereley, 2008 (Jul.), “Effects of Planar Inlet Plenums on the Hydrodynamically Developing Flows in Rectangular Microchannels of Complementary Aspect Ratios,” Microfluidics and Nanofluidics, 5, pp. 1-12.
8. J. Jang, D. Akin, R. Bashir, 2008 (Jun.), “Effects of Inlet/Outlet Configurations on the Electrostatic Capture of Airborne Nanoparticles and Viruses,” Measurement Science and Technology, 19, 065204.
7. A. Davila, J. Jang, A. Gupta, T. Walter, A. Aronson, R. Bashir, 2007 (Jun.),“Microresonator Mass Sensors for Detection of Bacillus anthracis Sterne Spores in Air and Water,” Biosensors and Bioelectronics, 22, pp. 3028-3035.
6. S. Bhattacharya, J. Jang, L. Yang, D. Akin, R. Bashir, 2007 (Mar.), “BioMEMS and Nanotechnology-based Approaches for Rapid Detection of Biological Entities,” Journal of Rapid Methods and Automation in Microbiology, 15, pp. 1-32. (invited review paper)
5. J. Jang, S. T. Wereley, 2007 (Feb.), “Gaseous Slip Flow Analysis of a Micromachined Flow Sensor for Ultra Small Flow Applications,” Journal of Micromechanics and Microengineering, 17, pp. 229-237.
4. J. Jang, D. Akin, K. S. Lim, S. Broyles, M. R. Ladisch, R. Bashir, 2007 (Feb.), “Capture of Airborne Nanoparticles in Swirling Flows Using Non-Uniform Electrostatic Fields for Bio-Sensor Applications,” Sensors and Actuators B: Chemical, 121, pp. 560-566.
3. J. Jang, S. T. Wereley, 2006 (Mar.), “Effective Heights and Tangential Momentum Accommodation Coefficients of Gaseous Slip Flows in Deep Reactive Ion Etching Rectangular Microchannels,” Journal of Micromechanics and Microengineering, 16, pp. 493-504.
2. J. Jang, S. T. Wereley, 2004 (Nov.),“Pressure Distributions of Gaseous Slip Flow in Straight and Uniform Rectangular Microchannels,” Microfluidics and Nanofluidics, 1, pp. 41-51.
1. J. Jang, S. S. Lee, 2000 (Mar.),“Theoretical and Experimental Study of MHD (Magnetohydrodynamic) Micropump,” Sensors and Actuators A: Physical, 80, pp. 84-89. (cited more than 100 times until now)
List of Peer-Reviewed International Conference Papers
7. J. Jang, D. Akin, K. S. Lim, M. R. Ladisch, R. Bashir, 2006, “Electrostatic Capture of Airborne Nanoparticles in Swirling Flows for Bio-MEMS Applications,” Proceedings of the ASME International Mechanical Engineering Congress and Exposition, Paper # 2006-15411, Nov. 5-10, Chicago, IL.
6. S.-Y. Lee, J. Jang, S. T. Wereley, 2004, “Entrance Length of Low Reynolds Number Flow in Microchannel,” Proceedings of the ASME International Mechanical Engineering Congress and Exposition, Paper # 2004-61908, Nov. 13-19, Anaheim, CA.
5. J. Jang, S. T. Wereley, 2004, “A Capacitive Micro Gas Flow Sensor based on Slip Flow,” Proceedings of the 17th IEEE International Micro Electro Mechanical Systems Conference, Jan. 25-29, Maastricht, The Netherlands, pp. 540-543.
4. J. Jang, S. T. Wereley, 2003, “Slip Flow Analyses of a Capacitive Pressure-Based Micro Flow Sensor,” Proceedings of the ASME International Mechanical Engineering Congress and Exposition, Paper # 2003-41142, Nov. 16-21, Washington, D.C.
3. J. Jang, Y. Zhao, S. T. Wereley, 2003, “Pressure Distributions and TMAC Measurements in Near Unity Aspect Ratio, Anodically Bonded Microchannels,” Proceedings of the 16th IEEE International Micro Electro Mechanical Systems Conference, Jan. 19-23, Kyoto, Japan, pp. 287-290.
2. J. Jang, Y. Zhao, S. T. Wereley, L. Gui, 2002, “Mass Flow Measurements of Gases in Deep-RIE Microchannels,” Proceedings of the ASME International Mechanical Engineering Congress and Exposition, Paper # 2002-33779, Nov. 17-22, New Orleans, LA.
1. J. Jang, S. S. Lee, 1998, “MHD (Magnetohydrodynamic) Micropump Using Lorentz Force,” Proceedings of the ASME International Mechanical Engineering Congress and Exposition, DSC-66, pp. 439-444, Nov. 15-20, Anaheim, CA.
List of Peer-Reviewed Domestic Conference Papers
1. S. Hong^, M. Cha^, M.-Y. Kang, J.-W. Lee, J. Jang, 2011, “Biofilm Removal Using Carbon Dioxide Aerosols,” Proceedings of the KSME 2011 Fall Annual Meeting, Nov. 2- Nov. 4, Daegu, S. Korea. (^: equal contribution)
List of International Conference Talks
3. K. Park, J. Jang, D. Akin, D. Irimia, M. Toner, R. Bashir, 2007, “Capture, Growth and Mass Measurement of Mammalian Cell on Silicon Cantilever Array,” Biomedical Engineering Society Annual Fall Meeting, Sep. 26-29, Los Angeles, CA.
2. J. Jang, A. Gupta, A. Davila, D. Akin, R. Bashir, 2005, “Nanomechanical Resonant Sensors for Virus Detection,” ASME Nanomechanics: Sensors and Actuators Conference, May 16-18, Knoxville, TN.
1. R. Bashir, A. Gupta, D. Akin, J. Jang, 2005, “Nano-mechanical Resonant Sensors for Virus Detection,” Chemical and Biological Sensing with Microcantilevers, American Physical Society Annual Meeting, Mar 21, Los Angeles, CA. (invited talk)
List of Domestic Patent
4. Airborne particle separator – Filed (2012.01.05)
3. Electrostatic bioaerosol concentrator –Filed (2012.01.03)
2.Flow-enhanced electrical filter and multiple flow-enhanced electrical filter – Filed (2011.08.11)
1. Electrostatically excited cantilever sensors – Filed (2011.08.11) .
Education
Jaesung Jang
jjang@unist.ac.kr