Meagher, A.; Garcia-Moreno, F.; Banhart, J.; Mughal, A.; Hutzler, S.: An experimental study of columnar crystals using monodisperse microbubbles. Colloids and Surfaces A-Physicochemical and Engineering Aspects 473 (2015), p. 55-59
10.1016/j.colsurfa.2014.12.020
Open Access Version (externer Anbieter)
Abstract:
We investigate the ordered arrangements of monodisperse microbub- bles con ned 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 re- semble the minimum energy con guration of hard spheres in cylindrical con nement as found in simulations. For larger ratios, , 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 resem- bling structures found at lower values. The average number of contacts per bubble is seen to increase with .