Abstract
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.
Original language | English |
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Pages (from-to) | 1716-1718 |
Number of pages | 3 |
Journal | Science |
Volume | 299 |
Issue number | 5613 |
DOIs | |
State | Published - 14 Mar 2003 |