Aqueous core colloidosomes with a metal shell
European Polymer Journal
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Sun, Q., & Routh, A. (2016). Aqueous core colloidosomes with a metal shell. European Polymer Journal, 77 155-163. https://doi.org/10.1016/j.eurpolymj.2016.01.044
Colloidosomes can be used in a wide variety of industries, such as food, bioreactors and medicine. We report for the first time, aqueous core colloidosomes with a gold or silver shell. The diameter of the water core is from 0.7 μm to 2 μm. The formation of gold coated colloidosomes was achieved by using sodium citrate (Na₃Citrate) in the core and gold chloride (HAuCl₄) in the wash solution. The gold shell colloidosomes are covered with spherical gold particles. Silver coated colloidosomes can be prepared by using L-Ascorbic acid in the core and silver nitrate (AgNO₃) in the wash solution. Various processing parameters result in different shell morphologies. The silver shell can seal the core of the microcapsule, and the encapsulated material can be released by the addition of nitric acid.
Colloidosomes, Gold shell, Silver shell, Encapsulated material
The authors thank Dr Richard Langford (Department of Physics, University of Cambridge) for his assistance with use of the scanning electron microscopy and the transmission electron microscopy. Qian Sun is grateful to the China Scholarship Council for funding (CSC Scholarship).
External DOI: https://doi.org/10.1016/j.eurpolymj.2016.01.044
This record's URL: https://www.repository.cam.ac.uk/handle/1810/253554