An experimental study of columnar crystals using monodisperse microbubbles

Aaron Meagher; F. García-Moreno; J. Banhart; Adil Mughal; S. Hutzler

doi:10.1016/j.colsurfa.2014.12.020

An experimental study of columnar crystals using monodisperse microbubbles

Aaron Meagher, F. García-Moreno, J. Banhart, Adil Mughal, S. Hutzler

Department of Mathematics

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Abstract

We investigate the ordered arrangements of monodisperse microbubbles confined within narrow cylinders. These foams were imaged using X-ray tomography, allowing the 3D positions of the bubbles of the foam to be accurately determined. The structure of these foams closely resemble the minimum energy configuration of hard spheres in cylindrical confinement as found in simulations. For larger ratios, λ, of cylinder to bubble diameter two- and three-layered crystals were formed. Each layer of these structures is found to be ordered, with each internal layer resembling structures found at lower λ values. The average number of contacts per bubble is seen to increase with λ. Document embargo 21/01/2016.

Original language	English
Pages (from-to)	55-59
Number of pages	5
Journal	Colloids and Surfaces A: Physicochemical and Engineering Aspects
Volume	473
Early online date	21 Jan 2015
DOIs	https://doi.org/10.1016/j.colsurfa.2014.12.020
Publication status	Published - 20 May 2015

Keywords

microbubbles
columnar crystals
ordering
x-ray tomography

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10.1016/j.colsurfa.2014.12.020

a256_meagher2014Accepted author manuscript, 11.9 MBLicence: Unclear 1

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Adil Mughal
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- Department of Mathematics - Lecturer
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title = "An experimental study of columnar crystals using monodisperse microbubbles",

abstract = "We investigate the ordered arrangements of monodisperse microbubbles confined within narrow cylinders. These foams were imaged using X-ray tomography, allowing the 3D positions of the bubbles of the foam to be accurately determined. The structure of these foams closely resemble the minimum energy configuration of hard spheres in cylindrical confinement as found in simulations. For larger ratios, λ, of cylinder to bubble diameter two- and three-layered crystals were formed. Each layer of these structures is found to be ordered, with each internal layer resembling structures found at lower λ values. The average number of contacts per bubble is seen to increase with λ. Document embargo 21/01/2016.",

keywords = "microbubbles, columnar crystals, ordering, x-ray tomography",

author = "Aaron Meagher and F. Garc{\'i}a-Moreno and J. Banhart and Adil Mughal and S. Hutzler",

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T1 - An experimental study of columnar crystals using monodisperse microbubbles

AU - Meagher, Aaron

AU - García-Moreno, F.

AU - Banhart, J.

AU - Mughal, Adil

AU - Hutzler, S.

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N2 - We investigate the ordered arrangements of monodisperse microbubbles confined within narrow cylinders. These foams were imaged using X-ray tomography, allowing the 3D positions of the bubbles of the foam to be accurately determined. The structure of these foams closely resemble the minimum energy configuration of hard spheres in cylindrical confinement as found in simulations. For larger ratios, λ, of cylinder to bubble diameter two- and three-layered crystals were formed. Each layer of these structures is found to be ordered, with each internal layer resembling structures found at lower λ values. The average number of contacts per bubble is seen to increase with λ. Document embargo 21/01/2016.

AB - We investigate the ordered arrangements of monodisperse microbubbles confined within narrow cylinders. These foams were imaged using X-ray tomography, allowing the 3D positions of the bubbles of the foam to be accurately determined. The structure of these foams closely resemble the minimum energy configuration of hard spheres in cylindrical confinement as found in simulations. For larger ratios, λ, of cylinder to bubble diameter two- and three-layered crystals were formed. Each layer of these structures is found to be ordered, with each internal layer resembling structures found at lower λ values. The average number of contacts per bubble is seen to increase with λ. Document embargo 21/01/2016.

KW - microbubbles

KW - columnar crystals

KW - ordering

KW - x-ray tomography

U2 - 10.1016/j.colsurfa.2014.12.020

DO - 10.1016/j.colsurfa.2014.12.020

M3 - Article

SN - 0927-7757

VL - 473

SP - 55

EP - 59

JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects

JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects

ER -

An experimental study of columnar crystals using monodisperse microbubbles

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