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Single Particle Semi-Reversible Solvatochromic Sensor.

Boyoung Yoon1, Narges Ahmadi1, Inwoong Heo1

  • 1Department of Chemical Engineering (BK21 FOUR Integrated Engineering Program), College of Engineering, Kyung Hee University, Yongin, Gyeonggi-do, 17104, Republic of Korea.

Small (Weinheim an Der Bergstrasse, Germany)
|May 28, 2025
PubMed
Summary
This summary is machine-generated.

New polydiacetylene@polydimethylsiloxane (PDA@PDMS) core-shell particles act as semi-reversible solvatochromic sensors. These particles detect multiple solvents with distinct color changes, enabling precise environmental monitoring.

Keywords:
colorimetric sensorcore–shell structurepolydiacetylene particlesemi‐reversible responsesolvatochromism

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Area of Science:

  • Materials Science
  • Chemical Sensing
  • Nanotechnology

Background:

  • Solvatochromic sensors change color in response to solvents.
  • Developing selective and reversible sensors is crucial for real-time monitoring.
  • Polydiacetylene (PDA) materials exhibit color changes upon external stimuli.

Purpose of the Study:

  • To develop a semi-reversible solvatochromic sensor using polydiacetylene@polydimethylsiloxane (PDA@PDMS) core-shell particles.
  • To investigate the solvent-induced color-change mechanism and its reversibility.
  • To evaluate the sensor's performance for multi-solvent detection.

Main Methods:

  • Fabrication of PDA@PDMS core-shell particles via co-flow microfluidics.
  • Exposure of particles to various solvents to induce monomer migration and color changes.
  • Characterization of solvatochromic responses under UV irradiation and solvent exposure cycles.

Main Results:

  • PDA@PDMS particles demonstrated semi-reversible color changes triggered by solvent exposure.
  • Solvent-induced response correlated with solvent permeability, PDMS swelling, and monomer solubility.
  • PDA@PDMS showed superior solvent differentiation compared to bare PDA and composite particles.

Conclusions:

  • PDA@PDMS core-shell particles provide a robust platform for sensitive and selective multi-solvent detection.
  • The sensor's semi-reversible nature allows for repeated use and real-time monitoring.
  • Potential applications include analytical chemistry and environmental monitoring.