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Dissolution of coated microbubbles: The effect of nanoparticles and surfactant concentration

Azmin, M; Mohamedi, G; Edirisinghe, M; Stride, EP; (2012) Dissolution of coated microbubbles: The effect of nanoparticles and surfactant concentration. Materials Science and Engineering: C , 32 (8) 2654 - 2658. 10.1016/j.msec.2012.06.019. Green open access

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Abstract

The ability of solid particles to stabilise emulsions is a well known phenomenon which has recently been demonstrated for the stabilisation of gas bubbles. In this paper, a new theoretical model is developed which describes how an adsorbed layer of solid nanoparticles modifies the interfacial tension and diffusivity of a gas bubble in a liquid and hence its stability. In agreement with experimental observations on microbubbles coated with 15 nm diameter spherical gold particles, the results of simulations with the model indicate that the particles substantially decrease the rate at which bubble dissolution occurs and enables them to maintain a stable radius once a critical particle concentration has been reached.

Type: Article
Title: Dissolution of coated microbubbles: The effect of nanoparticles and surfactant concentration
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.msec.2012.06.019
Publisher version: http://dx.doi.org/10.1016/j.msec.2012.06.019
Language: English
Additional information: This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Keywords: Microbubbles, Nanoparticles, Coated bubbles, Ultrasound contrast agents, Diffusion
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Mechanical Engineering
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Security and Crime Science
URI: https://discovery.ucl.ac.uk/id/eprint/1379245
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