Your SlideShare is downloading. ×
Transistors and microfluidic devices for biosensor applications
Transistors and microfluidic devices for biosensor applications
Transistors and microfluidic devices for biosensor applications
Transistors and microfluidic devices for biosensor applications
Transistors and microfluidic devices for biosensor applications
Transistors and microfluidic devices for biosensor applications
Transistors and microfluidic devices for biosensor applications
Transistors and microfluidic devices for biosensor applications
Transistors and microfluidic devices for biosensor applications
Transistors and microfluidic devices for biosensor applications
Upcoming SlideShare
Loading in...5
×

Thanks for flagging this SlideShare!

Oops! An error has occurred.

×
Saving this for later? Get the SlideShare app to save on your phone or tablet. Read anywhere, anytime – even offline.
Text the download link to your phone
Standard text messaging rates apply

Transistors and microfluidic devices for biosensor applications

1,572

Published on

Published in: Education, Technology, Business
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total Views
1,572
On Slideshare
0
From Embeds
0
Number of Embeds
1
Actions
Shares
0
Downloads
0
Comments
0
Likes
0
Embeds 0
No embeds

Report content
Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
No notes for slide

Transcript

  • 1. Polymer based transistors & microfluidic devices for biosensor applications
    Senaka Krishna Kanakamedala
    Advisor : Dr. Mark A DeCoster
    1
    Louisiana Tech University, Ruston, LA, USA
  • 2. Introduction : Organic Electro Chemical Transistors (OECT)
    • OECT : Low operating voltages , Aqueous environments & Simplified structure
    • 3. Electrode materials : Gold, silver and platinum
    • 4. Channel: Conducting polymers
    • 5. Electrolyte solution for electrochemical reactions
    Gate (G)
    Electrolyte
    Source (S)
    Drain (D)
    Polymer channel
    2
  • 6. OECT with Optimized Dimensions
    3
    • Electrode & Channel material: PEDOT:PSS (conducting polymer)
    Fig: Schematic diagram of the OECT (top view)
  • 7. OECT on Glass (left) & Polyester sheet (right)
    4
    Fabricated Transistors
  • 8. Film Thickness = 200 nm
    5
    Surface roughness of the patterned film
    Fig: AFM image of the PEDOT:PSS film
  • 9. Transistors Characteristics
    6
    Vds = Drain voltage, Ids = Drain current, and Vgs = Gate voltage
  • 10. Glucose Sensor Response

    Normalized Response
    I0 - IC
    =
    I0
    • I0 = Drain current before adding glucose
    • 11. IC = Drain current after adding glucose (concentration of interest)
    7
  • 12. Developed Field Effect Transistors
    8
    • Two sensor devices on a single chip
    • 13. Gold electrodes are separated by a narrow channel
    • 14. Channel length = 50µm
    4.5 mm
    4.6 mm
  • 15. 9
    Outlet
    Inlet 1
    Inlet 2
    Flexible disposable micromixer
    Fig : Solid works model of the polymer micromixer (left), three layered polymer patterns constitute microchannel of the micromixer (right)
  • 16. Fabricated flexible microfluidic devices
    10

×