1. Polymer based transistors & microfluidic devices for biosensor applications Senaka Krishna Kanakamedala Advisor : Dr. Mark A DeCoster 1 Louisiana Tech University, Ruston, LA, USA

3. Electrode materials : Gold, silver and platinum

4. Channel: Conducting polymers

5. Electrolyte solution for electrochemical reactionsGate (G) Electrolyte Source (S) Drain (D) Polymer channel 2

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

11. IC = Drain current after adding glucose (concentration of interest) 7

13. Gold electrodes are separated by a narrow channel

14. Channel length = 50µm4.5 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