Your SlideShare is downloading. ×
polymer 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

polymer transistors and microfluidic devices for biosensor applications

875

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
875
On Slideshare
0
From Embeds
0
Number of Embeds
1
Actions
Shares
0
Downloads
18
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. Micromolar Glutamate Sensing
    8
  • 13. Glutamate Release from Tumor Cells
    9
  • 14. Developed Field Effect Transistors
    10
    • Two sensor devices on a single chip
    • 15. Gold electrodes are separated by a narrow channel
    • 16. Channel length = 50µm
    4.5 mm
    4.6 mm
  • 17. 11
    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)
  • 18. Fabricated flexible microfluidic devices
    12

×