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Printed asymmetric microcapsules: Facile loading and multiple stimuli-responsiveness.

Valeriya Kudryavtseva1, Anton Bukatin2, Ekaterina Vyacheslavova3

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Summary
This summary is machine-generated.

Researchers developed new asymmetric polymer capsules using soft lithography for improved drug delivery. These functional capsules offer controlled release and versatile applications in medicine and beyond.

Keywords:
Controlled releaseLayer-by-layerPolylactic acidPolymer capsulesSoft lithography

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Nanotechnology

Background:

  • Existing colloidal particles and capsules face challenges like low loading capacity and non-uniformity.
  • There is a need for versatile carriers with tailored functionalities for diverse cargo.

Purpose of the Study:

  • To develop a method for fabricating defined-shaped, functionally asymmetric polymer capsules.
  • To combine the benefits of layer-by-layer and printed capsules for enhanced performance.
  • To create stimuli-responsive capsules with controlled geometry and monodisperse size distribution.

Main Methods:

  • Utilized a soft lithography approach for capsule fabrication.
  • Constructed asymmetric capsules using polyelectrolyte multilayers (PAH-PSS) for the 'cup' and biodegradable polyether (PLGA) for the 'lid'.
  • Investigated stimuli-responsive cargo release triggered by temperature, ultrasonication, and pH shifts.

Main Results:

  • Successfully fabricated asymmetric polymer capsules with a core-shell structure and monodisperse size distribution.
  • Demonstrated stimuli-responsive cargo release using temperature, ultrasonication, and pH changes.
  • Showcased the system's applicability for triggered drug release using dexamethasone.

Conclusions:

  • The developed soft lithography method enables the fabrication of defined-shaped, functionally asymmetric polymer capsules.
  • These asymmetric capsules offer stimuli-responsiveness and controlled cargo release, addressing limitations of current carrier systems.
  • The versatile capsules show potential for applications in pharmacology, diagnostics, sensors, micro- and nanoreactors, and chemical actuators.