Colloidal cubic diamond photonic crystals through cooperative self-assembly

Abstract

Colloidal cubic diamond crystal with low-coordinated and staggered structure, could display a wide photonic bandgap at low refractive index contrasts, which makes it extremely valuable for photonic applications. However, self-assembly...

Pursuing colloidal diamonds

“…Such a two-stage self-assembly route hinders the formation of different undesired structures, partly due to the monodispersity attained in the first step of the assembly process. Sun et al 10 also proposed an alternative route for the nucleation of colloidal photonic crystals which involved the utilization of the cooperative self-assembly of triblock patchy particles with spherical colloids, similar to the experimental realization. 18 Binary mixtures of tetrahedral patchy particles have also been studied quite recently.…”

“…In this respect, patchy particles have been extensively used. [7][8][9][10][11][12][13][14][15][16] The most straightforward approach is to distribute the patches over the spherical core of the particle matching the symmetry of the desired crystal structure. Although this seems to be a quite feasible way, tetrahedral patchy particles exhibit a quite complex phase diagram which includes crystallization into stacking hybrids of interlaced hexagonal (DH) and cubic diamonds (DC).…”

Photonic Crystal Hydrogels Fabricated from Nanoparticles of Fe3O4/SiO2 with Programmable Colors through Photopolymerization for Applications as Anticounterfeiting Applications

“…Nowadays, various fabrication techniques have been reported to prepare the PC hydrogel. One strategy is to generate PC templates by a variety of self-assembly methods, including dip coating, convective assembly, spin coating, or melt-shear organization, before the introduction of monomer into the PC structure, followed by photopolymerization of monomer to obtain PC hydrogel. However, these techniques typically involve delicate and time-consuming multistep processes.…”

Self Assembly of Patchy Anisotropic Particle Forming Free Standing Monolayer Film

“…To engineer materials with specific properties through selfassembly the patchy colloidal particle are considered as ideal building blocks. [12,13] Patchy particle usually have a hard core component with decorated patches on the surface. [12,14] The hard core component can have be symmetric shape like the sphere [12] or asymmetric shape like ellipsoids, [15] rods, [16] 2D structure, [17] etc.…”

“…[12,13] Patchy particle usually have a hard core component with decorated patches on the surface. [12,14] The hard core component can have be symmetric shape like the sphere [12] or asymmetric shape like ellipsoids, [15] rods, [16] 2D structure, [17] etc. Most of the studies have concentrated on spherical patchy particles.…”