Intermediate crystalline structures of colloids in shape space

Soft Matter ◽  
2018 ◽  
Vol 14 (43) ◽  
pp. 8692-8697 ◽  
Author(s):  
Daphne Klotsa ◽  
Elizabeth R. Chen ◽  
Michael Engel ◽  
Sharon C. Glotzer
Keyword(s):  
Particle Shape ◽  
Colloidal Crystals ◽  
Shape Space ◽  
Convex Polyhedra ◽  
Systematic Design ◽  
Triangle Groups ◽  
Crystalline Structures ◽  
Self Assembling

We computationally study the thermodynamic assembly of more than 40 000 hard, convex polyhedra belonging to three families of shapes associated with the triangle groups 323, 423, and 523. Our results provide a guide to self-assembling a host of related colloidal crystals through systematic design, through careful tweaking of particle shape.

scholarly journals Hydrodynamic and frictional modulation of deformations in switchable colloidal crystallites

2020 ◽  
Vol 117 (23) ◽  
pp. 12700-12706
Author(s):  
Young Ki Lee ◽  
Xiaoguai Li ◽  
Paris Perdikaris ◽  
John C. Crocker ◽  
Celia Reina ◽  
...  
Keyword(s):  
Principal Component Analysis ◽  
Diffusion Coefficients ◽  
Particle Shape ◽  
Colloidal Crystals ◽  
Principal Component ◽  
Nucleation And Growth ◽  
Spherically Symmetric ◽  
Dynamical Models ◽  
Micrometer Scale ◽  
The Impact

Displacive transformations in colloidal crystals may offer a pathway for increasing the diversity of accessible configurations without the need to engineer particle shape or interaction complexity. To date, binary crystals composed of spherically symmetric particles at specific size ratios have been formed that exhibit floppiness and facile routes for transformation into more rigid structures that are otherwise not accessible by direct nucleation and growth. There is evidence that such transformations, at least at the micrometer scale, are kinetically influenced by concomitant solvent motion that effectively induces hydrodynamic correlations between particles. Here, we study quantitatively the impact of such interactions on the transformation of binary bcc-CsCl analog crystals into close-packed configurations. We first employ principal-component analysis to stratify the explorations of a bcc-CsCl crystallite into orthogonal directions according to displacement. We then compute diffusion coefficients along the different directions using several dynamical models and find that hydrodynamic correlations, depending on their range, can either enhance or dampen collective particle motions. These two distinct effects work synergistically to bias crystallite deformations toward a subset of the available outcomes.

Inverse design of self-assembling colloidal crystals with omnidirectional photonic bandgaps

Soft Matter ◽  
2019 ◽  
Vol 15 (43) ◽  
pp. 8808-8826 ◽  
Author(s):  
Yutao Ma ◽  
Andrew L. Ferguson
Keyword(s):  
Colloidal Crystals ◽  
Design Strategy ◽  
Inverse Design ◽  
Photonic Bandgaps ◽  
Self Assembling ◽  
Patchy Colloids

We demonstrate an inverse design strategy to engineer anisotropic patchy colloids to self-assemble into colloidal lattices with omnidirectional photonic bandgaps.

Film-formation trend and film coverage percentage of continuous convective self-assembling of 2D colloidal crystals

2012 ◽  
Vol 24 (8) ◽  
pp. 1831-1835
Author(s):  
叶鑫 Ye Xin ◽  
黄进 Huang Jin ◽  
周信达 Zhou Xinda ◽  
张继成 Zhang Jicheng ◽  
蒋晓东 Jiang Xiaodong ◽  
...  
Keyword(s):  
Film Formation ◽  
Colloidal Crystals ◽  
Self Assembling

Controlled Self-Assembling Patterns of Colloidal Crystal by Solvent Modification

2008 ◽  
Vol 373-374 ◽  
pp. 694-697
Author(s):  
J. Wang ◽  
Y.C. Hu ◽  
B. Qu ◽  
B.P. Wang ◽  
Z.Z. Gu
Keyword(s):  
Thin Film ◽  
Aqueous Ethanol ◽  
Colloidal Crystal ◽  
Colloidal Crystals ◽  
Deposition Technique ◽  
Ethanol Mixture ◽  
Vertical Deposition ◽  
Self Assembling ◽  
Solvent Modification

Vertical deposition technique to fabricate thin film solid artificial opals is becoming widely used. In present work, we report on solvent modification and its effect on the arrangement of colloidal crystals. Micrometer-sized periodic stripe patterns of colloidal crystal were formed from the aqueous ethanol mixture solvents containing higher concentration of ethanol.

Phase behavior and design rules for plastic colloidal crystals of hard polyhedra via consideration of directional entropic forces

Soft Matter ◽  
2019 ◽  
Vol 15 (27) ◽  
pp. 5380-5389 ◽  
Author(s):  
Andrew S. Karas ◽  
Julia Dshemuchadse ◽  
Greg van Anders ◽  
Sharon C. Glotzer
Keyword(s):  
Phase Behavior ◽  
Particle Shape ◽  
Colloidal Crystals ◽  
Orientational Disorder ◽  
Design Rules ◽  
Translational Order

We show how directional entropic forces (which are set by particle shape) give rise to distinct behaviors in entropic systems with translational order and orientational disorder.

scholarly journals A tractable genotype–phenotype map modelling the self-assembly of protein quaternary structure

2014 ◽  
Vol 11 (95) ◽  
pp. 20140249 ◽  
Author(s):  
Sam F. Greenbury ◽  
Iain G. Johnston ◽  
Ard A. Louis ◽  
Sebastian E. Ahnert
Keyword(s):  
Self Assembly ◽  
Tertiary Structure ◽  
Quaternary Structure ◽  
Protein Complexes ◽  
Biological Evolution ◽  
Shape Space ◽  
The Self ◽  
Mutational Robustness ◽  
Self Assembling ◽  
Hp Lattice

The mapping between biological genotypes and phenotypes is central to the study of biological evolution. Here, we introduce a rich, intuitive and biologically realistic genotype–phenotype (GP) map that serves as a model of self-assembling biological structures, such as protein complexes, and remains computationally and analytically tractable. Our GP map arises naturally from the self-assembly of polyomino structures on a two-dimensional lattice and exhibits a number of properties: redundancy (genotypes vastly outnumber phenotypes), phenotype bias (genotypic redundancy varies greatly between phenotypes), genotype component disconnectivity (phenotypes consist of disconnected mutational networks) and shape space covering (most phenotypes can be reached in a small number of mutations). We also show that the mutational robustness of phenotypes scales very roughly logarithmically with phenotype redundancy and is positively correlated with phenotypic evolvability. Although our GP map describes the assembly of disconnected objects, it shares many properties with other popular GP maps for connected units, such as models for RNA secondary structure or the hydrophobic-polar (HP) lattice model for protein tertiary structure. The remarkable fact that these important properties similarly emerge from such different models suggests the possibility that universal features underlie a much wider class of biologically realistic GP maps.

Dielectrophoretic assembly of dimpled colloids into open packing structures

Soft Matter ◽  
2017 ◽  
Vol 13 (34) ◽  
pp. 5724-5730 ◽  
Author(s):  
Zhuoqiang Jia ◽  
Stefano Sacanna ◽  
Stephanie S. Lee
Keyword(s):  
Phase Transitions ◽  
Solid State ◽  
Electric Field ◽  
Particle Shape ◽  
Colloidal Crystals ◽  
Shape Anisotropy ◽  
Two Dimensional ◽  
Open Packing

Particle shape anisotropy enabled electric field-induced reversible solid-state phase transitions in two-dimensional colloidal crystals comprising dimpled spherical colloids.

Intranuclear Crystals in Regenerating Canine Kidneys

1973 ◽  
Vol 31 ◽  
pp. 412-413
Author(s):  
D.G. Osborne ◽  
L.J. McCormack ◽  
M.O. Magnusson ◽  
W.S. Kiser
Keyword(s):  
Epithelial Cell ◽  
Epithelial Cells ◽  
Tubular Epithelial Cell ◽  
Tubular Epithelial Cells ◽  
Cell Nuclei ◽  
Crystalline Structures ◽  
Small Crystals ◽  
Membrane Bound

During a project in which regenerative changes were studied in autotransplanted canine kidneys, intranuclear crystals were seen in a small number of tubular epithelial cells. These crystalline structures were seen in the control specimens and also in regenerating specimens; the main differences being in size and number of them. The control specimens showed a few tubular epithelial cell nuclei almost completely occupied by large crystals that were not membrane bound. Subsequent follow-up biopsies of the same kidneys contained similar intranuclear crystals but of a much smaller size. Some of these nuclei contained several small crystals. The small crystals occurred at one week following transplantation and were seen even four weeks following transplantation. As time passed, the small crystals appeared to fuse to form larger crystals.

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