Shape-Induced Frustration of Hexagonal Order in Polyhedral Colloids

by: Roel PA Dullens, Maurice CD Mourad, Dirk GAL Aarts, Jacob P Hoogenboom, Willem K Kegel

Physical Review Letters, Vol. 96, No. 2. (2006)

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Abstract

The effect of a nonspherical particle shape and shape polydispersity on the structure of densely packed hard colloidal particles was studied in real space by confocal microscopy. We show that the first layer at the wall of concentrated size-monodisperse but shape-polydisperse polyhedral colloids exhibits significant deviations from a hexagonal lattice. These deviations are identified as bond-orientational fluctuations which lead to percolating "mismatch lines." While the shape-induced geometrical frustration of the hexagonal symmetry suppresses translational order, bond-orientational order is clearly retained, indicating a hexaticlike structure of the polyhedral colloids.

@article{citeulike:1410018, abstract = {The effect of a nonspherical particle shape and shape polydispersity on the structure of densely packed hard colloidal particles was studied in real space by confocal microscopy. We show that the first layer at the wall of concentrated size-monodisperse but shape-polydisperse polyhedral colloids exhibits significant deviations from a hexagonal lattice. These deviations are identified as bond-orientational fluctuations which lead to percolating \"mismatch lines.\" While the shape-induced geometrical frustration of the hexagonal symmetry suppresses translational order, bond-orientational order is clearly retained, indicating a hexaticlike structure of the polyhedral colloids.}, author = {Dullens, Roel P. A. and Mourad, Maurice C. D. and Aarts, Dirk G. A. L. and Hoogenboom, Jacob P. and Kegel, Willem K. }, citeulike-article-id = {1410018}, doi = {http://dx.doi.org/10.1103/PhysRevLett.96.028304}, journal = {Physical Review Letters}, keywords = {colloidal, glass, qualifier, structure}, number = {2}, posted-at = {2007-06-25 03:30:51}, priority = {3}, publisher = {APS}, title = {Shape-Induced Frustration of Hexagonal Order in Polyhedral Colloids}, url = {http://dx.doi.org/10.1103/PhysRevLett.96.028304}, volume = {96}, year = {2006} }

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TY - JOUR ID - citeulike:1410018 L3 - citeulike-article-id:1410018 TI - Shape-Induced Frustration of Hexagonal Order in Polyhedral Colloids JF - Physical Review Letters VL - 96 IS - 2 PB - APS N2 - The effect of a nonspherical particle shape and shape polydispersity on the structure of densely packed hard colloidal particles was studied in real space by confocal microscopy. We show that the first layer at the wall of concentrated size-monodisperse but shape-polydisperse polyhedral colloids exhibits significant deviations from a hexagonal lattice. These deviations are identified as bond-orientational fluctuations which lead to percolating "mismatch lines." While the shape-induced geometrical frustration of the hexagonal symmetry suppresses translational order, bond-orientational order is clearly retained, indicating a hexaticlike structure of the polyhedral colloids. KW - colloidal KW - glass KW - qualifier KW - structure AU - Dullens, Roel AU - Mourad, Maurice AU - Aarts, Dirk AU - Hoogenboom, Jacob AU - Kegel, Willem PY - 2006/// UR - http://dx.doi.org/10.1103/PhysRevLett.96.028304 ER -

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