Melting and solid–solid transitions of two-dimensional crystals composed of Janus spheres

Soft Matter ◽  
2020 ◽  
Vol 16 (12) ◽  
pp. 3015-3021 ◽  
Author(s):  
Tao Huang ◽  
Yilong Han ◽  
Yong Chen
Keyword(s):  
Colloidal Crystal ◽  
Lattice Structure ◽  
Two Dimensional

A solid–solid transition is found in 2D Janus colloidal crystal in which particles rotate collectively but keep the lattice structure.

scholarly journals Boundary operation of 2D non-separable oversampled lapped transforms

2016 ◽  
Vol 5 ◽  
Author(s):  
Kosuke Furuya ◽  
Shintaro Hara ◽  
Kenta Seino ◽  
Shogo Muramatsu
Keyword(s):  
Discrete Cosine Transform ◽  
Local Control ◽  
Lattice Structure ◽  
Experimental Results ◽  
Perfect Reconstruction ◽  
Operation Technique ◽  
Two Dimensional ◽  
Hard Thresholding ◽  
Extension Method ◽  
Iterative Hard Thresholding

This paper proposes a boundary operation technique of two-dimensional (2D) non-separable oversampled lapped transforms (NSOLT). The proposed technique is based on a lattice structure consisting of the 2D separable block discrete cosine transform and non-separable redundant support-extension processes. The atoms are allowed to be anisotropic with the oversampled, symmetric, real-valued, compact-supported, and overlapped property. First, the blockwise implementation is developed so that the atoms can be locally controlled. The local control of atoms is shown to maintain perfect reconstruction. This property leads an atom termination (AT) technique as a boundary operation. The technique overcomes the drawback of NSOLT that the popular symmetric extension method is invalid. Through some experimental results with iterative hard thresholding, the significance of AT is verified.

Strength nature of two-dimensional woven nanofabrics under biaxial tension

2018 ◽  
Vol 28 (3) ◽  
pp. 367-379
Author(s):  
Yinfeng Li ◽  
Simanta Lahkar ◽  
Qingyuan Wei ◽  
Pizhong Qiao ◽  
Han Ye
Keyword(s):  
Lattice Structure ◽  
Biaxial Tension ◽  
Failure Process ◽  
High Strength ◽  
Two Dimensional ◽  
Strength Performance ◽  
Fabric Strength ◽  
Dynamics Simulations ◽  
Gap Spacing ◽  
Space Interval

Woven nanostructures have been acknowledged as a platform for solar cells, supercapacitors, and sensors, making them especially of interest in the fields of materials sciences, nanotechnology, and renewable energy. By employing molecular dynamics simulations, the mechanical properties of two-dimensional woven nanofabrics under biaxial tension are evaluated. Two-dimensional woven nanostructures composed of graphene and graphyne nanoribbons are examined. Dynamic failure process of both graphene woven nanofabric and graphyne woven nanofabric with the same woven unit cell initiates at the edge of interlaced ribbons accompanied by the formation of cracks near the crossover location of yarns. Further stress analysis reveals that such failure mode is attributed to the compression between two overlaced ribbons and consequently their deformation under biaxial tension, which is sensitive to the lattice structure of nanoribbon as well as the density of yarns in fabric. Systemic comparisons between nanofabrics with different yarn width and interval show that the strength of nanofabric can be effectively controlled by tuning the space interval between nanoribbons. For nanofabrics with fixed large gap spacing, the strength of fabric does not change with the ribbon width, while the strength of nanofabric with small gap spacing decreases anomalously with the increase in yarn density. Such fabric strength dependency on gap spacing is the result of the stress concentration caused by the interlace compression. The outcomes of simulation suggest that the compacted arrangement of yarns in carbon woven nanofabric structures should be avoided to achieve high strength performance.

Two-dimensional colloidal crystal corrugated waveguides

1999 ◽  
Vol 24 (12) ◽  
pp. 817 ◽  
Author(s):  
Yang Zhao ◽  
Ivan Avrutsky
Keyword(s):  
Colloidal Crystal ◽  
Two Dimensional ◽  
Corrugated Waveguides

Melting of a finite-sized two-dimensional colloidal crystal

2014 ◽  
Vol 89 (5) ◽  
Author(s):  
Sayuri Tanaka ◽  
Yuma Oki ◽  
Yasuyuki Kimura
Keyword(s):  
Colloidal Crystal ◽  
Two Dimensional
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