A Novel Polyurethane-Based Polyion Complex Material with Tunable Selectivity against Interferents for Selective
Zixin Zhang1, Hongchen Guo2, Yuugo Hirai2
1Advanced Science Research Laboratory, Saitama Institute of Technology, 1690, Fusaiji, Fukaya, Saitama 369-0293, Japan.
Biosensors
|June 27, 2023
Summary
A novel polyurethane-based polyion complex (PIC) material offers enhanced molecular selectivity for biosensors. This new material effectively detects dopamine while eliminating common interferents, advancing biosensing technology.
Area of Science:
- Materials Science
- Electrochemistry
- Biotechnology
Background:
- Polyion complex (PIC) materials are utilized in biosensors for molecular selectivity.
- Traditional PIC materials face challenges in achieving controllable selectivity and long-term stability due to dissimilar polycation (poly-C) and polyanion (poly-A) structures.
Purpose of the Study:
- To develop a novel polyurethane (PU)-based PIC material with improved molecular selectivity and stability.
- To evaluate the performance of the new PIC material in electrochemical detection of dopamine (DA).
Main Methods:
- Synthesized a novel PIC material where both poly-A and poly-C main chains are PU-based.
- Electrochemically detected dopamine (DA) in the presence of L-ascorbic acid (AA) and uric acid (UA) as interferents.
- Tuned sensitivity and selectivity by altering poly-A/poly-C ratios and incorporating nonionic polyurethane.
Main Results:
- The PU-based PIC material demonstrated significant elimination of AA and UA.
- High sensitivity and selectivity were achieved for DA detection.
- Sensitivity and selectivity were tunable by adjusting material composition.
- Developed a DA biosensor with a detection range of 500 nM to 100 μM and a 3.4 μM detection limit.
Conclusions:
- The novel PU-based PIC material overcomes limitations of traditional PICs, offering enhanced molecular selectivity and stability.
- This material shows significant potential for advancing selective molecular detection in biosensing applications.
- The developed DA biosensor exhibits excellent performance, paving the way for improved diagnostic tools.
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