Loading

Electrical and Computer Engineering

Ravi Prakash

Ravi Prakash, P.Eng

Assistant Professor

Dept. of Electrical and Computer Engineering
Queen's University
Walter Light Hall 408
19 Union Street
Kingston, ON K7L 3N6

ravi.prakash@queensu.ca

Ravi Prakash, P.Eng

Research

The recent advancements in emerging polymer and composite based flexible materials, alongside with the progress made towards micro and nano fabrication methods, have yielded exemplary progress to the domain of low-cost, disposable sensors and actuators. Copolymer materials with semiconductor and photoconductor properties have been leveraged in optical devices such as light-emitting diodes (LEDs), electronic displays, and liquid crystals, to name a few example illustrations.

The field of organic semiconductors and composite polymer materials has been recently tapped into for targeted applications in several domains including chemical, environmental and biological sensing. Polymeric semiconductor materials are promising for developing disposable micro/nano technologies which can be produced through an all room temperature fabrication process and are therefore highly suitable for low-cost, large-area applications which are conformable with flexible, printed microelectronic systems.

I will oversee the ‘Organic Semiconductor Laboratory (OSL)’, located in Walter Light Hall, WLH-506B. The mandate of OSL is to promote interdisciplinary research collaborations and industrial partnership in the domain of organic semiconductor devices and polymer electronics. Several impactful target research themes have been identified including, but not limited to:

  • Organic transistors as chemical and biological sensors
  • Physiological sensors and Micro-physiological systems
  • Composite biomaterials and bio-electronics for minimally invasive implants and Programmable Drug-Delivery Systems
  • Polymer electronics at SSI and MSI levels; Low-cost and large area applications
  • Other areas of interest: polymer photovoltaic cells and graphene-composites based electrochemical cells (flexible-batteries).

Biography

Ravi Prakash completed his PhD in 2013, at the Department of Electrical and Computer Engineering, University of Calgary. His doctoral thesis contributed to overcoming key challenges in the domain of electrostatics, lab-on-chip and electro-fluidic actuation for target biosciences and biochemical applications.

After his PhD, Ravi has received two postdoctoral fellowship awards, from Mitacs (2013) and NSERC Canada (2014). In his NSERC fellowship (2015-16), Ravi participated in a multidisciplinary research program between ProvLab Calgary and the University of Calgary. The project focused on utilizing cost-effective copolymer materials, electro-chemical methods and micro/nanotechnology fabrication techniques to design low-cost sample-to-answer microsystems for detection of infectious pathogens in human specimens.

His career accomplishments include 12 peer-reviewed journal publications, over 10 conference publications and 2 patents.

At the ECE Department, Queen’s University, Ravi’s research program will focus on design, fabrication and characterization of flexible, polymer based soft electronic devices.

Publications/Patents

Patents

  1. “Droplet-Based Microfluidic Device Having a Plurality of Reaction Sites”, Karan V.I.S. Kaler, Ravi Prakash, Pub. No: US 14/657,362; CA 14/25062, Filing Date: March 13th, 2015; status: ‘Non-final office action’.
  2. "Controlled Dispensing Of Ultrafine, Variable Volume, Emulsion Droplets", Karan V.I.S. Kaler, Ravi Prakash and Dipankar Chugh, Pub. No.: US 2012/0006681 A1, Pub. Date: Jan. 12th, 2012.

Journal Publications

  1. Ravi Prakash, Kanti Pabbaraju, Sallene Wong, Raymond Tellier, Karan V. I. S. Kaler, “Disposable sample-to-answer micro-device for detection of arboviruses in human and mosquito specimens”, Biomedical Microdevices, Manuscript in preparation’, 2017.
  2. Ravi Prakash, Kanti Pabbaraju, Sallene Wong, Raymond Tellier, Karan V. I. S. Kaler, “Integrated Sample-to-Detection Chip for Nucleic Acid Test Assays”, Biomedical Microdevices, vol. 18(3):44, DOI: 10.1007/s10544-016-0069-8, 2016.
  3. Ravi Prakash, Kanti Pabbaraju, Sallene Wong, Anita Wong, Raymond Tellier, Karan V. I. S. Kaler, “Multiplex, Quantitative, Reverse Transcription PCR Detection of Influenza Viruses Using Droplet Microfluidic Technology”, Micromachines, vol. 6, pp. 63-79, 2015.
  4. Karan V. I. S. Kaler, Ravi Prakash, “Droplet Microfluidics for Chip Based Diagnostics”, Sensors, vol. 14(12), pp. 23283-23306, 2014.
  5. Ravi Prakash, Kanti Pabbaraju, Sallene Wong, Anita Wong, Raymond Tellier, Karan V. I. S. Kaler, “Droplet Microfluidic Chip Based Nucleic Acid Amplification and Real-Time Detection of Influenza Viruses”, Journal of Electrochemical Society, vol. 161(2), pp. 3083-3093, 2014.
  6. Ravi Prakash and Karan V. I. S. Kaler, “Liquid Dielectrophoresis Dispensing of Vesicles for On-Chip Nucleic Acid Isolation and Detection”, Colloids and Surfaces A: Physicochemical and Engineering Aspects, vol. 432C, pp. 42-49, 2013.
  7. Ravi Prakash, Dimitrios P. Papageorgiou, Athanasios G. Papathanasiou, Karan V. I. S. Kaler, “Dielectrophoretic Liquid Actuation on Nano-Textured Super Hydrophobic Surfaces”, Sensors & Actuators B: Chemical, vol. 182, pp. 351-361, 2013.
  8. Ravi Prakash, Karan V. I. S. Kaler, “Microbead Dispensing and Ultralow DNA Hybridization Detection Using Liquid Dielectrophoresis”, Sensors & Actuators B: Chemical, vol. 169, pp. 274– 283, 2012.
  9. Ravi Prakash, Karan V. I. S. Kaler, Dimitrios P. Papageorgiou, Athanasios G. Papathanasiou, “Performance of Multilayered Fluoropolymer Surface Coating for DEP Surface Microfluidics Devices”, Microfluid. Nanofluid., vol. 13, pp. 309-318, 2012.
  10. Ravi Prakash, Karan V. I. S. Kaler, “Dispensing and bio-functionalization of giant unilamellar vesicles on a chip”, Journal of Physics, vol. 301, pp. 012015-18, 2011.
  11. Ravi Prakash, Reginald Paul, Karan V.I.S. Kaler, "Liquid DEP Actuation and Precision Dispensing of Variable Volume Droplets", Lab Chip, vol. 10, pp. 3094-3102, 2010.
  12. Karan V.I.S. Kaler, Ravi Prakash, Dipankar Chugh, "Liquid dielectrophoresis and surface microfluidics", Biomicrofluidics, vol. 4(2), pp. (022805)1-17, 2010.
  13. Ravi Prakash, Karan V. I. S. Kaler, "DEP actuation of emulsion jets and dispensing of sub-nanoliter emulsion droplets", Lab Chip, vol. 9, pp. 2836-44, 2009.

Book Chapter Publications

  1. Karan V.I.S. Kaler, Ravi Prakash, Chapter title: “Dielectrophoresis Based Droplet Microfluidic Devices for On-Chip Bioassays”, Book title: Microfluidics: Control, Manipulation and Behavioral Applications, Nova Science Publishers, Inc. New York (2012).

Peer Reviewed Conference Publications

  1. Ravi Prakash, Kanti Pabbaraju, Sallene Wong, Raymond Tellier and Karan V. I. S. Kaler, “Chip based Amplification and Detection of Influenza C Virus using Dielectrophoresis”, proc. 224th Electrochemical Society Meeting, San Francisco, 28th Oct.-1st Nov, 2013.
  2. Ravi Prakash and Karan V. I. S. Kaler, “L-DEP dispensing of functionalized lipid vesicles for chip based biosensing”, proc. 1st Int. Workshop on Wetting and Evaporation: droplets of pure and complex fluids, Marseilles, 17-20th June, 2013.
  3. Ravi Prakash, Karan V. I. S. Kaler, “Chip based assembly of vesicular bio-sensors using quantum dots as bio-probes”, Proc. 15th international conference on miniaturized systems for chemistry and life sciences, vol. 1, pp. 1448-1450, 2011.
  4. Ravi Prakash, Karan V.I.S. Kaler, "Chip Based Unilamellar Vesicle Formation And Dispensing Using Dielectrophoresis", Proc. 14th international conference on miniaturized systems for chemistry and life sciences (MicroTAS), vol. 1, pp. 417-419, 2010.
  5. Ravi Prakash, Dipankar Chugh, Karan V.I.S. Kaler, "Quantitative Biochemical Assay On a Surface Microfluidic Device", Proc. 3rd International Joint Conference on Biomedical Engineering Systems and Technologies (Biodevices 2010), vol. 1, pp. 51-58, 2010.
  6. Ravi Prakash, Dipankar Chugh and Karan V. I. S. Kaler, "Quantitative DNA Hybridization Assay On a Multiplexed Surface Microfluidic Device", Proc. 2nd Micro/Nanoscale Heat Transfer International Conference (MNHMT 2009), vol. 1, pp. 1-9, 2009.
  7. Ravi Prakash, Dipankar Chugh, Karan V. I. S. Kaler, "Multiplexed Surface Microfluidic Liquid and Droplet DEP Manipulations for HTS", Proc. 13th international conference on miniaturized systems for chemistry and life sciences (MicroTAS), vol. 1, pp. 156-158, 2009.

Conferences and Workshops

  1. Invited presentation at the 2nd Microfluidic Integrated Platform (MIP) user group meeting organized by CMC Microsystems Canada (Toronto, May 2015).
  2. Oral presentation at the 5th Advances in Microfluidic and Nanofluidics (AMN) Meeting, Taipei, Taiwan (21st–23rd May, 2014).
  3. Invited presentation at the 1st Microfluidic Integrated Platform (MIP) user group meeting under the emSYSCAN initiative, organized by CMC Microsystems Canada (Toronto, Nov. 2013).
  4. Invited presentation at the 8th International meeting on Electrowetting, Athens, Greece (21-23rd June, 2012).
  5. Oral presentation at the 15th International conference on miniaturized systems for chemistry and life sciences (MicroTAS 2011), Seattle, USA (Oct. 3-7th 2011).
  6. Live broadcasted interview with Alberta Primetime as part of the Media day event organized by the Media Relations, University of Calgary to demonstrate an example microfluidic chip for potential bio-assay applications. (Calgary, February 7th, 2011).
  7. Poster presentation at 14th International conference on miniaturized systems for chemistry and life sciences (MicroTAS 2010), Groningen, The Netherlands (3-7th Oct. 2010).
  8. Invited presentation under the 'Emerging Technologies' category at the ACAMP (Alberta Centre for Advanced MNT Products) Cleantech seminar (September 2010, Calgary, AB) to demonstrate possible environmental applications of droplet microfluidic technology.
  9. Oral presentation at the 3rd International Joint Conference on Biomedical Engineering Systems and Technologies (Biodevices 2010), Valencia, Spain (19-23rd Jan. 2010).
  10. Oral presentation at the 13th international conference on miniaturized systems for chemistry and life sciences (MicroTAS 2009), Jeju, Korea (3-7th Oct. 2009).

Teaching

ELEC252 - Electronics I (Winter 2017)
ELEC271 – Digital Systems (Fall 2017)
ELEC344 – Sensors and Actuators (Fall 2017)