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Copolythiophene-based water-gated organic field-effect transistors for biosensing
Clément Suspène1, Benoit Piro, Steeve Reisberg
1Univ. Paris Diderot, Sorbonne Paris Cité, ITODYS, UMR 7086 CNRS, 15 rue J-A de Baïf, 75205 Paris Cedex 13, France. piro@univ-paris-diderot.fr.
Journal of Materials Chemistry. B
|April 9, 2020
Summary
This study demonstrates protein sensing using water-gated organic field-effect transistors. Biotinylated polymers enabled specific detection of avidin and streptavidin, showing potential for biosensing applications.
Area of Science:
- Materials Science
- Biotechnology
- Electronics
Background:
- Organic field-effect transistors (OFETs) offer potential for label-free biosensing.
- Developing selective sensing materials for protein detection remains a challenge.
Purpose of the Study:
- To investigate the use of water-gated OFETs for protein sensing.
- To functionalize a copolythiophene with biotin for specific protein capture.
- To evaluate the transistor performance upon interaction with different proteins.
Main Methods:
- Synthesis and characterization of a biotinylated copolythiophene.
- Fabrication of OFETs using the functionalized polymer as the channel material.
- Testing transistor response to proteins like avidin, streptavidin, and human serum albumin.
Main Results:
- The biotinylated polymer effectively interacted with avidin and streptavidin.
- Pretreatment with 1-octanol reduced non-specific protein binding.
- Specific protein binding caused a decrease in the drain current of the OFETs.
Conclusions:
- Water-gated OFETs functionalized with biotinylated polymers can detect specific proteins.
- This approach shows promise for developing sensitive and selective protein biosensors.
- Optimization of surface treatments is crucial for minimizing non-specific interactions.
