Patchy colloids form a diamond lattice

Physics Today ◽  
2020 ◽  
Vol 2020 (1) ◽  
pp. 1014a
Keyword(s):  
Diamond Lattice ◽  
Patchy Colloids

The dislocation structure of a 10° [110] tilt boundary in silicon

1983 ◽  
Vol 41 ◽  
pp. 114-115
Author(s):  
B. Cunningham ◽  
D.G. Ast
Keyword(s):  
Dislocation Structure ◽  
Tilt Angle ◽  
Imaging Technique ◽  
Diamond Lattice ◽  
Tilt Boundary ◽  
Formation Mechanisms ◽  
Diffraction Contrast ◽  
Lattice Fringe ◽  
Tilt Boundaries ◽  
Chemically Vapor Deposited

There have Been a number of studies of low-angle, θ < 4°, [10] tilt boundaries in the diamond lattice. Dislocations with Burgers vectors a/2<110>, a/2<112>, a<111> and a<001> have been reported in melt-grown bicrystals of germanium, and dislocations with Burgers vectors a<001> and a/2<112> have been reported in hot-pressed bicrystals of silicon. Most of the dislocations were found to be dissociated, the dissociation widths being dependent on the tilt angle. Possible dissociation schemes and formation mechanisms for the a<001> and a<111> dislocations from the interaction of lattice dislocations have recently been given.The present study reports on the dislocation structure of a 10° [10] tilt boundary in chemically vapor deposited silicon. The dislocations in the boundary were spaced about 1-3nm apart, making them difficult to resolve by conventional diffraction contrast techniques. The dislocation structure was therefore studied by the lattice-fringe imaging technique.

Enhanced Magnetic Frustration in a New High Entropy Diamond Lattice Spinel Oxide

2020 ◽  
Author(s):  
Sourav Marik ◽  
Deepak Singh ◽  
Bruno Gonano ◽  
Fabien Veillon ◽  
Denis Pelloquin ◽  
...  
Keyword(s):  
Diamond Lattice ◽  
Magnetic Frustration ◽  
Spinel Oxide ◽  
High Entropy

Phase behavior of a binary mixture of patchy colloids: Effect of particle size and gravity

2021 ◽  
Vol 155 (4) ◽  
pp. 044903
Author(s):  
Rodrigo Braz Teixeira ◽  
Daniel de las Heras ◽  
José Maria Tavares ◽  
Margarida M. Telo da Gama
Keyword(s):  
Particle Size ◽  
Binary Mixture ◽  
Phase Behavior ◽  
Effect Of Particle Size ◽  
Patchy Colloids

Design of bending dominated lattice architectures with improved stiffness using hierarchy

2018 ◽  
Vol 233 (11) ◽  
pp. 3976-3993 ◽  
Author(s):  
Maen Alkhader ◽  
Mohammad Nazzal ◽  
Karim Louca
Keyword(s):  
Finite Element ◽  
Cell Walls ◽  
Detrimental Effect ◽  
Diamond Lattice ◽  
Finite Element Simulations ◽  
Deformation Mechanisms ◽  
Manufacturing Processes ◽  
Cellular Solids ◽  
Stiffness Anisotropy

Micro-architectured lattices are a promising subclass of cellular solids whose inner topologies can be tailored to enhance their stiffness. Generally, enhancing lattices' stiffness is achieved by increasing their connectivity. This strategy gives rise to a stiffer response by forcing lattices' ligaments to deform mainly in an axial manner. Conversely, this work is interested in developing micro-architectured lattices with enhanced stiffness, but whose cell walls deform in a flexural manner. Such structures can be more ductile and exhibit better energy mitigation abilities than their stretching dominated counterparts. Enhancing the stiffness of bending dominated lattices without increasing their connectivity can be realized by transforming them to hierarchical ones. This work explores, using experimentally verified finite element simulations, the effect of fractal-inspired hierarchy and customized nonfractal-based hierarchy on stiffness, anisotropy, and deformation mechanisms of an anisotropic bending dominated diamond lattice. Results show that fractal-inspired hierarchy can significantly enhance the stiffness of bending dominated lattices without affecting their deformation mechanisms or anisotropy level; ill-designed hierarchy can have a detrimental effect on lattice's stiffness; and customized hierarchy are more effective than fractal-inspired hierarchy in enhancing lattices' stiffness as well as can be more compatible with traditional, reliable, mass-producing manufacturing processes.

scholarly journals Realization of the anisotropic compass model on the diamond lattice of Cu2+ in CuAl2O4

2018 ◽  
Vol 98 (20) ◽  
Author(s):  
S. A. Nikolaev ◽  
I. V. Solovyev ◽  
A. N. Ignatenko ◽  
V. Yu. Irkhin ◽  
S. V. Streltsov
Keyword(s):  
Diamond Lattice
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