People

Ravi Prakash

Assistant Professor
5160 Mackenzie Building
613-520-2600 ext. 5758

About Ravi Prakash

Biography

Dr. Ravi Prakash received his B.Sc. degree (2008) in Mechanical and Biomedical Engineering from Indian Institute of Technology Madras, India, and his M.Sc. (2010) and Ph.D. (2013) in Electrical and Computer Engineering from University of Calgary, Canada. Prior to joining Carleton in 2018, he worked as Assistant Professor in the Electrical Engineering Department at Queen's University (2017-18), and as an NSERC postdoctoral fellow (2015-16) in Calgary. His research contributions are primarily in the fields of Lab-on-Chip micro-devices, biosensors for point-of-care diagnostics, soft-wearable systems for continuous, non-invasive health monitoring, environmental monitoring systems, cost-effective copolymer semiconductor, conductor and superconductor materials, and micro/nano fabrication techniques. His career accomplishments over the past eight years include over 40 peer-reviewed publications, including 21 journal publications, 15 conference publications, 2 book chapters, 3 patents, and over 20 invited talks/seminars.

At Carleton University, Dr. Prakash oversees the Organic Sensor and Devices Laboratory (OSDL), investigating organic, label-free chemical and biological sensors, screen-printed bio-electronic microsystems, flexible organic electronic components for wearables and human-device interfacing, and smart surfaces and interfaces for environmental monitoring applications. OSDL research initiatives regularly attract collaborators from industry and academic partner institutions in Ontario, across Canada and internationally, and sustains and supports a strong cluster of undergraduate, graduate and post-doctoral trainees.

Dr. Prakash is a licensed professional engineer in the province of Ontario, and member of several technical organizations including Institute of Electrical and Electronics Engineers (IEEE), the IEEE Engineering in Medicine and Biology Society, IEEE Sensors Council, and the Canadian Engineering Education Association (CEEA). He serves as peer reviewer for several international journals.

 

Research

The recent advancements in organic semiconductor, conductor and dielectric materials and micro/nanofabrication techniques have yielded exciting developments in the domain of low-cost, flexible electronic devices and systems. The choice of carbon-based semiconductor materials has opened several possibilities for designing electronic system topologies using organic transistor devices, screen-printed disposable sensors and integrated systems for wearable technology and point-of-care applications. Polymeric semiconductor and conductor materials are highly promising for developing disposable micro/nano technologies which can be produced through room temperature facile fabrication process and are suitable for low-cost flexible printed microelectronic systems.

Dr. Prakash’s research contributions are primarily in the fields of biosensors for point-of-care diagnostics, soft-wearable systems for continuous, non-invasive health monitoring, chemical sensors for environmental monitoring, additive manufacturing using copolymer semiconductor, conductor and dielectric materials, and micro/nano fabrication techniques.

At Carleton University, Dr. Prakash oversees the Organic Sensor and Devices Laboratory (OSDL), investigating organic, label-free chemical and biological sensors, screen-printed bio-electronic microsystems, flexible organic electronic components for wearables and human-device interfacing, and smart surfaces and interfaces for environmental monitoring applications. OSDL research initiatives regularly attract collaborators from industry and academic partner institutions in Ontario, across Canada and internationally.

Dr. Prakash is member of several technical organizations including Institute of Electrical and Electronics Engineers (IEEE), the IEEE Engineering in Medicine and Biology Society (EMBS), and the IEEE Sensors Council.Current research programs include:

  • Organic chemical and biological sensors (Electrolyte gated OFETs, OTFTs, Graphene-based chemiresistors, chemicapacitors, impedimetric, and electroimpedance sensors)
  • Non-invasive detection of hormones, proteins, nucleic acids, and VOCs in oral bio-fluids (saliva and Exhaled Breath)
  • Point-of-Care DNA Biosensors (on-chip rt-RT-PCR and isothermal LAMP RT-PCR assays)
  • Electrophysiological sensors and micro-physiological systems
  • Environmental sensing and monitoring
  • Nano composite biomaterials for bio-energy storage and harvesting
  • Integrated flexible electronic systems at SSI and MSI levels for low-cost applications
  • Other areas of interest: graphene-composites based electrochemical cells (flexible-batteries); minimally invasive implants; and programmable drug delivery systems.

 

Publications

Journal Publications

  1. Roslyn Massey*, Ravi Prakash, “A Low Temperature Processed, Soft-fluidic OEGFET Saliva Aptasensor for Cortisol”, IEEE J-FLEX, ‘accepted’, January 2022.
  2. Mounia Chakik*, Siziwe Bebe, Ravi Prakash, "Hydrogenated Graphene Based Organic Thin Film Transistor Sensor for Detection of Chloride Ions as Corrosion Precursors" Applied Sciences, 12, no. 2: 863, 2022. https://doi.org/10.3390/app12020863
  3. Roslyn Massey*, Ravi Prakash, "Modeling the Double Layer Capacitance Effect in Electrolyte Gated FETs with Gel and Aqueous Electrolytes" Micromachines, 12, no. 12: 1569, 2021. https://doi.org/10.3390/mi12121569 .
  4. B. Gamero*, S. Bebe and R. Prakash, "Molecularly Imprinted Electroimpedance Sensor for Detection of 8-Isoprostane in Exhaled Breath Condensate," IEEE Sensors Letters, 5(9), pp. 1-4, Sept. 2021, https://doi.org/10.1109/LSENS.2021.3103433 .
  5. Lucy Li, Mounia Chakik*, Ravi Prakash, "A Review of Corrosion in Aircraft Structures and Graphene-Based Sensors for Advanced Corrosion Monitoring" Sensors, 21, no. 9: 2908, 2021. https://doi.org/10.3390/s21092908 .
  6. Rana Amache*, Siziwe Bebe, Ravi Prakash, Thin Film Bio-EDLC System with PVA-Carrageenan blend as the biopolymer electrolyte, Soft Materials, ‘Under review’, January 2022.
  7. Roslyn Massey*, Siziwe Bebe, Ravi Prakash, “Aptamer Enhanced Organic Electrolyte Gated FET Biosensor for High Specificity Detection of Cortisol”, IEEE Sensors Letters, ‘IEEE Sensors Letters, 4(7), pp. 1-4, DOI: 10.1109/LSENS.2020.3002446, 2020.
  8. Ravi Prakash, “Carbon based smart organic devices and bio-product derived sustainable technology applications. J. Material Sciences & Engineering, 8, DOI: 10.4172/2169-0022-C3-131, 2019.
  9. Ravi Prakash, Anita Wong*, Kanti Pabbaraju, Karan V. I. S. Kaler, Raymond Tellier, Detection of Arboviruses in Blood and Mosquito Slurry Samples using Polymer Microchip, IEEE Trans - NIH Healthcare Innovations and Point of Care Technology, vol. 1, pp. 168-171, 2017.
  10. 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): pp. 44(1-14), 2016.
  11. 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.
  12. Karan V. I. S. Kaler, Ravi Prakash, Droplet Microfluidics for Chip Based Diagnostics, Sensors, vol. 14(12), pp. 23283-23306, 2014.
  13. 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.
  14. 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: Physiochemical and Engineering Aspects, vol. 432C, pp. 42-49, 2013.
  15. Ravi Prakash, Dimitrios P. Papageorgiou, Athanasios G. Papathanasiou, Karan V. I. S. Kaler,Dielectrophoretic Liquid Actuation on Nano-Textured Super Hydrophobic Surfaces, Sensors and Actuators B: Chemical, vol. 182, pp. 351-361, 2013.
  16. Ravi Prakash, Karan V. I. S. Kaler, Microbead Dispensing and Ultralow DNA Hybridization Detection Using Liquid Dielectrophoresis, Sensors and Actuators B: Chemical, vol. 169, pp. 274– 283, 2012.
  17. 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.
  18. 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.
  19. 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.
  20. Karan V.I.S. Kaler, Ravi Prakash, Dipankar Chugh, Liquid dielectrophoresis and surface microfluidics, Biomicrofluidics, vol. 4(2), pp. (022805)1-17, 2010.
  21. 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.

 

Conference Publications

    1. Roslyn Massey*, Ravi Prakash, “Flexible Organic Electrolyte Gated FET Biosensor with Integrated Soft Fluidics for Cortisol Monitoring in Oral Samples”, 2021 IEEE Sensors, 2021, pp. 1-4, doi: 10.1109/SENSORS47087.2021.9639461.
    2. Ivan Amor*, Bruno Gamero*, Siziwe Bebe, Ravi Prakash, “Hydrothermally Fluorinated Graphene Oxide Chemiresistive Sensor for Detecting NH3 and Acetone under Atmospheric Conditions, Proc. 14th International Joint Conference on Biomedical Engineering Systems and Technologies, Vol. 1 BIODEVICES, ISBN 978-989-758-490-9, pp. 99-106, February 2021.
    3. Roslyn Massey*, Siziwe Bebe, Rana Amache, Ravi Prakash, "A Comprehensive Modelling Approach for Bio-EDLC systems," 2020 IEEE SENSORS, pp. 1-4, doi: 10.1109/SENSORS47125.2020 .9278742, 2020.
    4. Ravi Prakash, Kanti Pabbaraju, Sallene Wong, Raymond Tellier and Karan V. I. S. Kaler, Droplet Microfluidics based Multiplexed, Real-time PCR Assay for Detection of a Respiratory Viral Panel, Advances in Microfluidics and nanofluidics 2014, Taipei, 21-23rd May 2014.
    5. 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.
    6. 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.
    7. Ravi Prakash, Karan V. I. S. Kaler, Dimitrios P. Papageorgiou, Athanasios G. Papathanasiou, Raymond Tellier, Multiplexed Post Amplification Viral Screening Assay using Surface Microfluidic Technology, Proc. Electrowetting 2012, Athens, 20-23rd June, 2012.
    8. Ravi Prakash, Karan V. I. S. Kaler, Dimitrios P. Papageorgiou, Athanasios G. Papathanasiou, Composite surface coating for improved DEP surface microfluidics, Proc. 8th International meeting on Electrowetting, Athens, June 21st-23rd, 2012.
    9. 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.
    10. Ravi Prakash, Karan V. I. S. Kaler, “Dispensing and bio-functionalization of giant unilamellar vesicles on a chip, proc. 13th international conference on Electrostatics, Bangor (UK), April 2011.
    11. 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.
    12. 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.
    13. 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.
    14. 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.

 

Book Chapters

    1. Ravi Prakash, Siziwe Bebe, Chapter title: Chemical Functionalization of Graphene Oxide and Applications in Chemical, Biological and Environmental Sensing, Book title: Advances in Materials Science Research, Nova Science Publishers, Inc. New York (2022).
    2. 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).

 

Patents and Technology Disclosures

    1. “Planar Bioelectrolytic Capacitors”, Ravi Prakash, Siziwe Bebe, and Rana Amache, Provisional IP filing date: February 14th, 2020, Ref. no: CA 62976548.
    2. 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.
    3. 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.

 

Presentations

    1. Hydrothermally functionalized graphene oxide chemiresistive biosensor for detecting NH3 in exhaled breath. The 31st Anniversary World Congress on Biosensors (Biosensors 2021).
    2. Invited oral presentation at the 7th Smart Materials and Sustainable Technologies conference on April 06-08, 2019, Toronto, Canada.
    3. Invited talk in the Biosensors and Bioelectronics session at the World Conference & Expo on Biomedical Engineering on July 16-17, 2018, Miami, USA.
    4. Invited research seminar on “Disposable chemical and biological sensors for application in health and medicine”, at the Collaborative Biomedical Engineering Research Program, Queen’s University.
    5. Polymer Microchip Technology for Rapid Detection of Arboviruses in Blood and Mosquito Slurry Samples. IEEE - NIH 2017 Special Topics Conference on Healthcare Innovations and Point-of-Care Technologies (HI-POCT), Bethesda, MD, United States (Nov. 6th-8th, 2017).
    6. Polymer Transistors and Printed microelectronics: New research program at ECE Department, Queen’s University. Centre for Advancing Electronics Dresden, Distinguished Seminar Series, Dresden, Germany (May 29th, 2017). (Invited)
    7. Chip Diagnostics and Polymer Semiconductor based Biological, Electro-chemical Sensor Applications. Seminar at Xerox Research Center of Canada, Mississauga, Canada (April 20th, 2017). (Invited)
    8. Chip Diagnostics and Polymer Semiconductor based Electro-chemical, Photonic Sensors and Integrated Microsystems. Research meeting with the Printed Electronics group, National Research Council of Canada, Ottawa, Canada (Feb. 2017). (Invited)
    9. Panel presentation at the 2nd Microfluidic Integrated Platform (MIP) user group meeting organized by CMC Microsystems Canada (Toronto, May 2015). (Invited)
    10. Industrial Networking presentation at Innovate Calgary for ATS Venture Inc., to seek industry collaboration towards CIHR and CHRP grant applications (Calgary, September 2014).
    11. 5th Advances in Microfluidic and Nanofluidics (AMN) Meeting, Taiwan (21st – 23rd May, 2014).
    12. Invited presentation at the 1st Microfluidic Integrated Platform (MIP) user group meeting under the emSYSCAN initiative, organized by CMC Microsystems Canada (Toronto, Nov. 2013).
    13. Exhibition presentation at the 2012 Texpo Research and Exhibition event (Toronto, ON), organized by CMC Microsystems.
    14. 8th International meeting on Electrowetting, Athens, Greece (21-23rd June 2012). (Invited)
    15. 15th International conference on miniaturized systems for chemistry and life sciences (MicroTAS 2011), Seattle, USA (Oct. 3-7th 2011).
    16. 13th International conference on Electrostatics, Bangor, Wales, UK (10-14th April 2011).
    17. Media day event (Media Relations, University of Calgary) to demonstrate droplet microfluidic chip technology for potential bio-assay applications. The event was covered by various national news outlets (Global, CTV, Calgary Herald, and Access Alberta) and included a live interview with Alberta Primetime (Calgary, February 7th, 2011).
    18. 14th International conference on miniaturized systems for chemistry and life sciences (MicroTAS 2010), Groningen, The Netherlands (3-7th Oct. 2010).
    19. 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.
    20. 3rd International Joint Conference on Biomedical Engineering Systems and Technologies (Biodevices 2010), Valencia, Spain (19-23rd Jan. 2010).
    21. 13th international conference on miniaturized systems for chemistry and life sciences (MicroTAS 2009), Jeju, Korea (3-7th Oct. 2009).
    22. 5th Canadian Workshop on MEMS and Microfluidics (CWMEMS 2007), Montreal, Canada (12-13th Aug. 2007).

 

Teaching

Microelectronics; Physical Electronics; Digital Systems; MEMS and NEMS, Sensors and Actuators; Integrated Microsystems; Solar Cells.

Department of Electronics
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