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Related Experiment Video

Updated: Mar 1, 2026

Encapsulation and Permeability Characteristics of Plasma Polymerized Hollow Particles

Encapsulation and Permeability Characteristics of Plasma Polymerized Hollow Particles

Published on: August 16, 2012

Understanding the Mechanisms of Gold Shell Growth onto Polymer Microcapsules to Control Shell Thickness.

Alison L Tasker^1,2, James Hitchcock¹, Elaine A Baxter¹

¹School of Chemical and Process Engineering, University of Leeds, Woodhouse Lane, Leeds, LS2 9JT, UK.

Chemistry, an Asian Journal

|May 26, 2017

Summary

Achieving thin metal shells on microcapsules is key for preventing molecule loss. Densely packed nanoparticles on the surface are required for the thinnest possible gold shells, crucial for effective encapsulation.

Keywords:

gold metal shell growth nanoparticles platinum polymer microcapsules shell thickness

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Last Updated: Mar 1, 2026

Encapsulation and Permeability Characteristics of Plasma Polymerized Hollow Particles

Encapsulation and Permeability Characteristics of Plasma Polymerized Hollow Particles

Published on: August 16, 2012

Microfluidic Fabrication of Core-Shell Microcapsules carrying Human Pluripotent Stem Cell Spheroids

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Large Area Substrate-Based Nanofabrication of Controllable and Customizable Gold Nanoparticles Via Capped Dewetting

Large Area Substrate-Based Nanofabrication of Controllable and Customizable Gold Nanoparticles Via Capped Dewetting

Published on: February 26, 2019

Area of Science:

Materials Science
Nanotechnology
Chemical Engineering

Background:

Polymer microcapsules are widely used but flawed for volatile molecules due to porous shells.
Metal shells offer an innovative solution to prevent molecule leakage from microcapsule cores.
Minimizing metal shell thickness is crucial, especially with expensive metals.

Purpose of the Study:

To investigate mechanisms controlling gold shell thickness on poly(methyl methacrylate) microcapsules.
To understand the influence of nanoparticle distribution on shell thickness.
To propose models for gold shell growth based on nanoparticle surface coverage.

Main Methods:

Encapsulation of fragrance oil in poly(methyl methacrylate) microcapsules.
Coating microcapsules with gold nanoparticles.
Quantification of nanoparticle density and resulting shell thickness.
Analysis of shell growth mechanisms at varying nanoparticle surface coverages.

Main Results:

Gold shell thickness is dependent on nanoparticle surface coverage.
At low nanoparticle concentrations, thicker gold shells are formed.
Gold growth appears to fill gaps between nanoparticles on the capsule surface.

Conclusions:

Densely packed nanoparticle monolayers are necessary for achieving the thinnest gold shells.
Understanding nanoparticle distribution is critical for controlling metal shell thickness.
This research provides insights into optimizing metal-shelled microcapsules for enhanced containment.