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Supercooled dynamics of grain boundary particles in two-dimensional colloidal crystals
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10.1063/1.3640417
/content/aip/journal/jcp/135/12/10.1063/1.3640417
http://aip.metastore.ingenta.com/content/aip/journal/jcp/135/12/10.1063/1.3640417
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Figures

Image of FIG. 1.
FIG. 1.

(a) An orientational Voronoi plot of the grain boundary, where the color of each cell represents the local orientation parameter of the corresponding particle, as indicated by the color scale. The shaded band around the interface (solid line) represents the distance criterion for locating the GB particles (see Sec. II D). The inset on the top shows an image of a small part of the grain boundary. The inset on the left shows a typical tangent-hyperbolic fit to the local orientation parameter profile for a single bin. (b) The mean square displacement for the selection n c ≠ 6 (×), for (◯), for 12σ (△), and for the bulk crystal particles (□). The inset shows a segment of the GB, with particle positions plotted over a period of 2500 s.

Image of FIG. 2.
FIG. 2.

Mean square displacements for the grain boundary particles ⟨r 2⟩ (○), split into, along the boundary, ⟨x 2⟩ (□), and perpendicular to it, ⟨y 2⟩ (△), and for the bulk crystal in the x (×) and y (⋄) directions.

Image of FIG. 3.
FIG. 3.

(a) Self part of the van Hove correlation function along (x) and perpendicular (y) to the grain boundary for the grain boundary particles (○) and the bulk crystalline particles (□), for t = 200 s. The solid lines are Gaussian fits to the data. (b) Non-Gaussian parameters for the motion along the grain boundary (x, □), perpendicular to it (y, △), and for the bulk crystalline particles in x (○) and y (⋄).

Image of FIG. 4.
FIG. 4.

Typical cluster of moving particles (to scale) in the grain boundary illustrating the cooperative nature of the particle motion. The light spheres are the particle positions at t 0 = 0 s and the dark spheres are the positions at t = 200 s.

Image of FIG. 5.
FIG. 5.

(a) Probability distribution, P(n), of cluster sizes, n, for different times: t = 1 s (□), t = 5 s (○), t = 10 s (⋄), t = 220 s (△), and t = 1050 s (×). (b) The normalized weight-averaged mean cluster size, S, as a function of the observation time window, t.

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/content/aip/journal/jcp/135/12/10.1063/1.3640417
2011-09-30
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Supercooled dynamics of grain boundary particles in two-dimensional colloidal crystals
http://aip.metastore.ingenta.com/content/aip/journal/jcp/135/12/10.1063/1.3640417
10.1063/1.3640417
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