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SMALL
  • is the Sensors & MicroActuators Learning Lab at the University at Buffalo, the State University of New York (SUNY-Buffalo). The lab director is Assistant Professor Kwang W. Oh in the Department of Electrical Engineering.
  • Our research interests in SMALLab are sensors and microactuators in the areas of so-called
    • LOC (lab-on-a-chip)
    • MicroTAS (Micro Total Analysis Systems)
    • BioMEMS (Bio Micro Electro Mechanical Systems)
    • SANS (Sample-to-Answer Nano/microfluidic Systems)
    • Microvalves, micropumps, microfluidics, etc.
  • Our current interests in SMALLab are microfluidics and BioMEMS in the areas of
    • Microfluidic circuits
    • Droplet-based microfluidics
    • Pressure-driven microfluidics
    • Cell spheroid formation
    • Biosensors
SMALL Announcement (2006 - 2011)
  December 2011
  • PAPER: Jing Xu, Byungwook Ahn, Kangsun Lee, Hun Lee, Rajagopal Panchapakesan, Linfeng Xu, and Kwang W. Oh*, "Droplet-based microfluidic device for multiple-droplet clustering," Lab Chip, 2012, DOI:10.1039/C2LC20883K (Impact Factor: 6.3)  [Link] [Movie S1], [Movie S2], [Movie S3]
    • This paper was listed as one of the most downloaded articles for the last 30 days since 12/23/2011 until 01/14/2012 [Link].
    • It has been highlighted on the LOC blog: Hot articles on bubble removal, microfluidic wound-healing assays, multiplexed screening and more [Link].

  • Our recent article, "A new fabrication process for uniform SU-8 thick photoresist structures by simultaneously removing edge bead and air bubbles," in Journal of Micromechanics and Microengineering (JMM), Vol 21, pp125006 (2011), has been downloaded more than 250 times so far within 1.5 month (from 11/03/2011 to 12/20/2011) (IF: 2.281) [Link]
    • To put this into context, across all IOP (Institute of Physics) journals only 10% of articles were accessed over 250 times this quarter (4th quarter of 2011).

  November 2011
  • NEW OFFICE and LAB SPACE: Prof. Kwang W. Oh's office is placed in 113C Davis Hall (from the week of 11/14/2011) and SMALLab is placed in 117 Davis Hall and 326 Bonner Hall (from the week of 10/31/2011).
  October 2011
  • PAPER: Byungwook Ahn, Kangsun Lee, Hun Lee, Rajagopal Panchapakesan, Linfeng Xu, Jing Xu and Kwang W. Oh, "Guiding, distribution, and storage of trains of shape-dependent droplets," Lab Chip, DOI: 10.1039/c1lc20729f, 2011 (Impact Factor: 6.3) [Link] [Movie S1], [Movie S2], [Movie S3]

  • CONFERENCE: SMALLab presented one oral and four poster presentations in MicroTAS 2011, Seattle, WA, USA (10/02/2011 - 10/06/2011).

  • PROCEEDING: Byungwook Ahn, Kangsun Lee, Rajagopal Panchapakesan, Hun Lee, and Kwang W. Oh, ”°Guiding and distribution of a train of droplets employing side flows and guiding tracks,”± Proc. in MicroTAS 2011, pp. 674 – 676 (accept rate: 6.8% for oral presentation)
  • PROCEEDING: Byungwook Ahn, Kangsun Lee, Hun Lee, Rajagopal Panchapakesan, and Kwang W. Oh, ”°Droplet synchronization of two parallel trains of droplets using a ladder-like channel network,”± Proc. in MicroTAS 2011, pp. 1639 – 1641 (accept rate: 44%)
  • PROCEEDING: Hun Lee, Byungwook Ahn, Kangsun Lee, and Kwang W. Oh, ”°Continuous-flow in-droplet magnetic particle separation in a droplet-based microfluidic platform,”± Proc. in MicroTAS 2011, pp. 948 – 950 (accept rate: 44%)
  • PROCEEDING: Jing Xu, Byungwook Ahn, Hun Lee, Kangsun Lee, Rajagopal Panchapakesan, Linfeng Xu, and Kwang W. Oh, ”°Droplet-based microfluidic devices for multiple-droplet trapping, storing, and clustering employing guiding tracks and forward/backward flows,”± Proc. in MicroTAS 2011, pp. 257 – 259 (accept rate: 44%)
  • PROCEEDING: Kangsun Lee, Choong Kim, Byungwook Ahn, Hun Lee, Rajagopal Panchapakesan, Linfeng Xu, Jing Xu, Ji Yoon Kang, and Kwang W. Oh, ”°Single-layer microfluidic network-based combinatorial dilution for a standard Simplex-Lattice combinatorial design,”± Proc. in MicroTAS 2011, 939 – 941 (accept rate: 44%)
  September 2011
  • Course Offering: EE 428/528 BioMEMS and Lab-on-a-chip (Fall 2011)
  • New Student: Ms. Deepika Kalra joined our SMALLab as a master student.
  • New Student: Ms. Ailin Lin joined our SMALLab as a SHIP-Undergraduate Intern.
  August 2011
  • Ph.D. Thesis Defense: Congratulations to Dr. Kangsun Lee. He has successfully defended his Ph.D thesis dissertation on 08/17/2011. Also congratulate Dr. Lee for having a R&D position at LG Electronics Advanced Institute of Technology, Korea. 
  • Ph.D. Thesis Defense: Congratulations to Dr. Byungwook Ahn. He has successfully defended his Ph.D thesis dissertation on 08/15/2011. Also congratulate Dr. Ahn for having a post-doc position at Emory University School of Medicine and Georgia Institute of Technology.
  July 2011
  June 2011
  • PAPER: Byungwook Ahn, Kangsun Lee, Rajagopal Panchapakesan, and Kwang W. Oh, "On-demand electrostatic droplet charging and sorting," Biomicrofluidics, 5, paper 024113, 2011 (Impact Factor: 3.9) [Link].
  May 2011
  February 2011
  • PAPER: K. Lee, C. Kim, Y. Kim, B. Ahn, R. Panchapakesan, J. Bang, J. Kim, Y. K. Yoon, J. Y. Kang, and K. W. Oh, "Microfluidic concentration-on-demand combinatorial dilutions," Microfluid Nanofluid, 11, pp. 75-86, 2011 (Impact Factor: 3.5)  [ Link].
  January 2011
  • PAPER: C. Kim, K.S. Lee, J.H. Bang, Y.E. Kim, M.-C. Kim, K.W. Oh, S.H. Lee and J.Y. Kang, "3-dimensional cell culture for on-chip differentiation of stem cells in embryoid body," Lab Chip,  11, pp. 874-882, 2011 (Impact Factor: 6.3) [Link] [Movie 1] [Movie 2] [Movie 3].
  • PAPER: C. Kim, S. Chung, Y.E. Kim, K.S. Lee, S.H. Lee, K.W. Oh, and J.Y. Kang, "Generation of core-shell microcapsules with three-dimensional focusing device for efficient formation of cell spheroid," Lab Chip, 11, pp. 246-252 (Impact Factor: 6.3) [Link].
  • New Student: Mr. Miguel Gadea and Mr. Seongeun Jin joined SMALL lab as undergraduate students.
  • Course Offering: EE 203 Electric Circuit 2 in Spring 2011
  • Course Offering: UE141T: BRINGING PHYSICS & ENGINEERING TO LIFE" in Spring 2011 (DISCOVERY SEMINAR COURSE)
    • Instructors: Professors Markelz (Physics, UB), Oh (Electrical Eng, UB), and Snell (Structural Biology, HWI)
    • Highlights: You will see how biology is studied from three very different view points: Prof. Markelz is a physicist and she is looking for fundamental physical properties using optics, Prof. Oh is an electrical engineer who designs and fabricates microfluidic systems for manipulation of biological samples and Prof. Snell is a structural biologist who is studying the relationship between the structure of proteins and what they do and how to prevent bad things from happening.
  October 2010
  • STUDENT AWARD: Byungwook Ahn received the Mark Diamond Research (MDRF) Award for his Ph.D. research from Graduate Student Association (GSA) at UB.
  August 2010
  • New Student: Mr. Hun Lee joined SMALL lab as a Ph.D. student.
  • Course Offering: Prof. Oh offers EE 428/528 BioMEMS & Lab-on-a-chip in Fall 2010.
  June 2010
  • MS Thesis Defense: Preethi Gopalan has successfully presented her MS thesis work on 06/28/2010.
  • CONFERENCE PAPER ACCEPTED: Our SMALL group will present our research in MicroTAS 2010 conference, Groningen, The Netherlands, 10/03/10-10/07/10.
    • "Gravity-oriented Microfluidic Device for Cell Spheroid Formation"
    • "Microfluidic Network-based Combinatorial Dilution Device with an Initial Concentration Controller"
    • "Robust On-demand Electrostatic Droplet Charging and Sorting in a Droplet-based Microfluidic Device"
    •
  • STUDENT AWARD: Rajagopal Panchapakesan received the Mark Diamond Research (MDRF) Award for his Ph.D. research from Graduate Student Association (GSA) at UB.
  May 2010
  • AWARD: Professional Development Award 2010, New York State/United University Professions
  • GRANT AWARD: NSF #1002255: Droplet-based Microfluidic Separation Technology for High-throughput Magnetic Bead-based Immunoassays, Single PI, 05/2010 - 04/2013
  February 2010
  • GRANT AWARD: NSF #0959989: MRI-R^2: Development of STIM and DATS for Protein and Nanosystem Characterization, PI: Andrea Markelz, Co-PIs: John Cerne, Edward Snell, Kwang Oh, 02/2010 - 01/2013
  • AWARD: Research Initiatives Travel Fund Program, School of Engineering and Applied Sciences, UB (for ASME IMECE 2009)
  • CALL FOR A PAPER

    Prof. Kwang W. Oh is co-organizing a topic of "Energy and Power in Micro and Nano Systems" in Micro and NanoSystems, ASME IMECE (International Mechanical Engineering Congress & Exposition), Vancouber, Canada, November 12 - 18, 2010.

    The objective of this symposium is to advance the state of the art in Microsystems and technologies for energy conversion, storage, and management.

    Original manuscripts are solicited in the following topics:

    Micro and nano technology for energy conversion
    Micro and nanotechnology for energy storage
    Micro and nano technology for energy management
    Applications of energy harvesting devices

    Analytical, computational, and experimental approaches using micro/nano- devices, or technology for energy conversion/harvest, storage, and management are all welcome. Examples of the devices include fuel cells, micro heat engine, piezoelectric, thermo-acoustics, thermo-electric, photovoltaic cells, nanostructured materials, biologically inspired approaches, streaming potential, etc. Devices for fuel-reforming, fuel storage, and energy management with the integration to micro/nano device/technology are also of interest.

    This is the overall publication schedule for IMECE. For specific details and questions regarding the flexibility of some of these dates, please contact the appropriate volunteer Organizer.

    Submission of Abstract
    March 15, 2010

    Author Notification of Abstract Acceptance
    March 29, 2010

    Submission of Full-Length Draft Paper for Review
    May 31, 2010

    Author Paper Review Acceptance or Revision Notification to Author
    July 19, 2010

    Submission of Revised Draft Paper
    August 6, 2010

    Submission of Final Paper
    August 19, 2010
  January 2010
  December 2009
  • Top 20 (6th) Most Downloaded Articles in Biomicrofluidics (December 2009): "Concurrent droplet charging and sorting by electrostatic actuation," Byungwook Ahn, Kangsun Lee, Romain Louge, and Kwang W. Oh, Biomicrofluidics 3, 044102 (2009)
  • PAPER: Kangsun Lee, Choong Kim, Byungwook Ahn, Ji Yoon Kang, and Kwang W. Oh, "Hydrodynamically Focused Particle Filtration Using An Island Structure," Biochip Journal, 3, 275 – 280, 2009.
  November 2009
  • Top 20 (5th) Most Downloaded Articles in Biomicrofluidics (November 2009): "Concurrent droplet charging and sorting by electrostatic actuation," Byungwook Ahn, Kangsun Lee, Romain Louge, and Kwang W. Oh, Biomicrofluidics 3, 044102 (2009)
  • AWARD: Research Initiatives Travel Fund Program, School of Engineering and Applied Sciences, UB (for MicroTAS 2009)
  • INVITED TALK: "Microfluidic Circuits, Devices, and Applications," Gwangju Institute of Science and Technology (GIST), Korea, 11/06/2009.
  • INVITED TALK: "Microfluidic Systems and Droplet-Based Microfluidics," Physics Department, Chonbuk National University, Korea, 11/05/2009.
  • CONFERENCE PRESENTATION: 3 papers were presented in MicroTAS 2009.
  • CONFERENCE PRESENTATION: 2 papers were presented in ASME - IMECE 2009.
  October 2009
  September 2009
  August 2009
  June 2009
  • AWARD: Professional Development Award 2009, New York State/United University Professions
  • CONFERENCE PAPER ACCEPTED: Our SMALL group will present our research in MicroTAS 2009 conference, Jeju, Korea, 11/01/09-11/05/09
    • "2-layer based microfluidic dilution generator for drug screening"
    • "Microfluidic network based combinatorial device for high throughput screening an optimization"
    • "Microfabrication of rounded channel and waveguide integrated microlens using timed development and thermal reflow process"
  • CONFERENCE PAPER ACCEPTED: Our SMALL group will present our research in ASME IMECE 2009 (International Mechanical Engineering Congress & Exposition) conference, Lake Buena Vista, Florida, 11/13/09-11/19/09
    • "Hydrodynamic focusing based particle filtration using an island structure with built-in valves"
    • "Streaming potential measurement in live plants for energy harvesting applications"
  April 2009
  • GRANT AWARD: "Development of Combinatorial Microfluidic Devices for Stem Cell Applications." KIST.
  • CONFERENCE PAPER: "Double layer based micro fluidic dilution generator for drug screening" by K. Lee, et al., Proc. in MMB 2009, the Fifth International Conference on Microtechnologies in Medicine and Biology, Québec City, Canada, April 1-3, 2009, pp. 92-93 (2009).
  February 2009
  • CO-ORGANIZER/SECTION CHAIR: "Energy and Power in Micro and Nano Systems" in Micro and NanoSystems, ASME IMECE (International Mechanical Engineering Congress & Exposition), Lake Buena Vista, Florida, November 13 - 19, 2009.
  • CO-ORGANIZER/SECTION CHAIR: "Nanotechnology in Biology and Medicine," the 2nd annual Integrated Nanostructured Systems (INS) Workshop, Center for the Arts, The University at Buffalo, May 2009.
  January 2009
  • PAPER: "Generalized serial dilution module for monotonic and arbitrary microfluidic gradient generators" by K. Lee, et al., Lab Chip, 9, 709-717, 2009 (DOI:10.1039/B813582G). The impact factor of Lab on a Chip journal is 6.5.
  • Prof. Kwang W. Oh was included in Marquis Who's Who in America 2009 Edition.

    •
  Prof. Oh has co-organized the 2nd Annual Integrated Nanostructured Systems Workshop, Nanotechnology in Biology and Medicine Workshop, May 13, 2009, Center for the Arts, The University at Buffalo (SUNY), Buffalo, New York, USA (05/2009).
  [Call for a paper] Prof. Kwang W. Oh is co-organizing a topic of "Energy and Power in Micro and Nano Systems" in Micro and NanoSystems, ASME IMECE (International Mechanical Engineering Congress & Exposition), Lake Buena Vista, Florida, November 13 - 19, 2009.

The objective of this symposium is to advance the state of the art in Microsystems and technologies for energy conversion, storage, and management.

LIST OF TOPICAL AREAS
Original manuscripts are solicited in the following topics:
- Micro and nano technology for energy conversion
- Micro and nano technology for energy storage
- Micro and nano technology for energy management
- Applications of energy harvesting devices

Analytical, computational, and experimental approaches using micro/nano- devices, or technology for energy conversion/harvest, storage, and management are all welcome. Examples of the devices include fuel cells, micro heat engine, piezoelectric, thermo-acoustics, thermo-electric, photovoltaic cells, nanostructured materials, biologically inspired approaches, streaming potential, etc. Devices for fuel-reforming, fuel storage, and energy management with the integration to micro/nano device/technology are also of interest.

Prospective authors should submit a 400-word abstract via the web tool at the Congress 2009 website.

SPONSORING DIVISIONS and TECHNICAL COMMITTEES
Microelectromechanical Systems Division, Design Division, Micro and Nano Systems Technical Committee; (02/2009)
  A journal paper "Generalized Serial Dilution Module For Monotonic and Arbitrary Microfluidic Gradient Generators" by Kangsun Lee, Choong Kim, Byungwook Ahn, Rajagopal Panchapakesan, Anthony R. Full, Ledum Nordee, Ji Yoon Kang and Kwang W. Oh (Lab Chip, DOI:10.1039/B813582G) was accepted to Lab on a Chip journal, a peer-reviewed scientific journal which publishes original research and review articles on any aspect of miniaturization at the micro and nano scale. The impact factor of Lab Chip is 5.821 (12/2008)
  We presented our research in MicroTAS 2008 (San Diego, 10/12/08-10/16/08) conference: "Fast, robust and simultaneous sorting with droplet generation by synchronized high switching frequency of electrostatic actuation." Accept rate for MicroTAS 2008 was 59% (06/2008).
  We presented our research in ASME-IMECE Microfluidics 2008 (Boston, 10/31/08-11/06/08)) conference: "Simultaneous Water Droplet Formation and Sorting Using an Electric Field." (06/2008)
  Prof. Kwang W. Oh has been included in Marquis Who's Who in America 2009 Edition (06/2008).
  Prof. Kwang W. Oh has received a fund through TCIE (The Center for Industrial Effectiveness at UB) and New Scale Technologies, Inc (NY): "Design of a Micropump using Piezoelectric Motors".
  Prof. Kwang W. Oh has received an NSF fund: "SGER: Development of MEMS Based Microfluidic Devices for Biological Target Detection and Sorting", ECCS-0736501.
  Prof. Kwang W. Oh has recently contributed to a new book by writing a chapter Magnetic Actuation: Comprehensive Microsystems - Pioneering Developments in MEMS Technologies, 3-Volume Set (2100 pages, internationally-recognized experts, clear and extensive cross-referencing, full-color photographs & diagrams) / ISBN:978-0-444-52194-1(published September 2007)
  1st Annual Integrated Nanostructured Systems Workshop, Multifunctional Nanomaterials and Nanodevices, May 18-19, 2007, Center for the Arts, The University at Buffalo (SUNY), Buffalo, New York, USA
  Kwang W. Oh and Chong H. Ahn, ”°A review of microvalve,”± Journal of Micromechanics and Microengineering, 16, pp. R13–R39, 2006
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