Grain Boundary Scars and Spherical Crystallography

From Soft-Matter
Revision as of 02:23, 28 April 2009 by Lidiya (Talk | contribs) (Soft Matter Example)

Jump to: navigation, search

by Lidiya Mishchenko


A. R. Bausch, M. J. Bowick, A. Cacciuto, A. D. Dinsmore, M. F. Hsu, D. R. Nelson, M. G. Nikolaides, A. Travesset, D. A. Weitz, Grain Boundary Scars and Spherical Crystallography, Science 299, 1716-1718 (2003).


"We describe experimental investigations of the structure of two-dimensional spherical crystals. The crystals, formed by beads self-assembled on water droplets in oil, serve as model systems for exploring very general theories about the minimum-energy configurations of particles with arbitrary repulsive interactions on curved surfaces. Above a critical system size we find that crystals develop distinctive high-angle grain boundaries, or scars, not found in planar crystals. The number of excess defects in a scar is shown to grow linearly with the dimensionless system size. The observed slope is expected to be universal, independent of the microscopic potential."

Soft Matter Keywords

Colloid, interface, crystal defects, stress/strain on lattice

Soft Matter Example

Particle coated toluene droplets suspended in water. A shows a small spherical droplet with only a single defect (shown in B). C shows a large droplet with excess dislocations (D).

Bausch Grain Boundary Scars Science 2003 (2).JPG