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Related Experiment Video

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Triplet Fusion Upconversion Nanocapsule Synthesis
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Untemplated Resveratrol-Mediated Polydopamine Nanocapsule Formation.

Devang R Amin1,2, Cody J Higginson1, Angie B Korpusik1

  • 1Departments of Bioengineering and Materials Science and Engineering , University of California, Berkeley , 210 Hearst Mining Building , Berkeley , California 94720 , United States.

ACS Applied Materials & Interfaces
|September 20, 2018
PubMed
Summary

This study introduces a new, template-free method for creating polydopamine nanocapsules. These capsules efficiently encapsulate resveratrol, offering a promising approach for delivering bioactive compounds.

Keywords:
capsuledopaminenanocapsulenanoparticlepolydopamineresveratrol

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Biomaterials

Background:

  • Polydopamine nanocapsules are valuable for drug delivery, catalysis, and imaging.
  • Previous methods required templating for polydopamine nanocapsule synthesis.
  • Polydopamine offers advantages like free radical scavenging, biocompatibility, and biodegradability.

Purpose of the Study:

  • To develop a template-free synthesis for polydopamine nanocapsules.
  • To investigate the encapsulation of resveratrol within these nanocapsules.
  • To characterize the nanocapsules and their properties.

Main Methods:

  • Spontaneous synthesis in an ethanolic resveratrol/dopamine hydrochloride solution at pH 8.5.
  • Characterization using UV-Vis spectroscopy, X-ray photoelectron spectroscopy, HPLC, ESI-MS, TEM, and DLS.
  • Assessment of free radical scavenging activity using a DPPH assay.

Main Results:

  • A template-free method for polydopamine nanocapsule formation was established.
  • Resveratrol was successfully incorporated into the nanocapsules.
  • A soluble fluorescent dopamine-resveratrol adduct was identified.
  • Nanocapsule size and shell thickness were optimized by varying synthesis parameters.
  • The synthesized nanocapsules demonstrated significant free radical scavenging activity.

Conclusions:

  • A convenient, template-free pathway for creating polydopamine nanocapsules encapsulating resveratrol has been developed.
  • This method facilitates the encapsulation of resveratrol and potentially other hydrophobic bioactive compounds.
  • The resulting nanocapsules possess excellent free radical scavenging properties.