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Controlled release kinetics from a surface modified microgel-based reservoir device.

Siyuan Guo1, Yongfeng Gao, Menglian Wei

  • 1Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2, Canada. michael.serpe@ualberta.ca.

Journal of Materials Chemistry. B
|April 9, 2020
PubMed
Summary
This summary is machine-generated.

This study presents a novel microgel-based device for controlled drug release. The release rate of Crystal Violet (CV) is tunable by adjusting the silica coating thickness on a gold layer.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Drug Delivery Systems

Background:

  • Microgels offer tunable properties for advanced applications.
  • Controlled release systems are crucial for effective drug delivery.
  • Gold nanoparticles and silica coatings enable novel material functionalities.

Purpose of the Study:

  • To develop and characterize a novel microgel-based device for controlled release of small molecules.
  • To investigate the influence of silica layer thickness on drug release kinetics.
  • To demonstrate a facile fabrication method for tunable drug release platforms.

Main Methods:

  • Fabrication of a device with poly(N-isopropylacrylamide)-co-acrylic acid (pNIPAm-co-AAc) microgels sandwiched between gold layers.
  • Loading of Crystal Violet (CV) via electrostatic interaction at pH > 6.5.
  • Coating the device with a silica (SiO2) layer via hydrolysis of tetraethyl orthosilicate (TEOS).
  • Triggering CV release by exposure to pH 3 and analyzing release rates based on SiO2 thickness.

Main Results:

  • Successful loading and triggered release of Crystal Violet (CV) were achieved.
  • The release rate of CV was modulated by the thickness of the silica coating.
  • Thicker silica layers resulted in slower release, while thinner layers allowed for faster release.

Conclusions:

  • The developed device provides a simple and effective platform for controlled and triggered release.
  • The release kinetics can be precisely tuned by adjusting the silica layer thickness.
  • This technology holds promise for advanced drug delivery applications requiring controlled release profiles.