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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.

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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.

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biosensordopamine detectionpolyion complexpolyurethaneselective membrane

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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.