scholarly journals Self‐Assembly of Colloidal Particles for Fabrication of Structural Color Materials toward Advanced Intelligent Systems

2019 ◽  
Vol 2 (1) ◽  
pp. 1900085
Author(s):  
Heng Zhang ◽  
Xiuming Bu ◽  
SenPo Yip ◽  
Xiaoguang Liang ◽  
Johnny C. Ho
Keyword(s):  
Self Assembly ◽  
Intelligent Systems ◽  
Colloidal Particles ◽  
Structural Color

scholarly journals Self-Assembly of Colloidal Particles into Amorphous Photonic Crystals

2021 ◽  
Author(s):  
Yang Hu ◽  
Yuqi Zhang ◽  
Dongpeng Yang ◽  
Dekun Ma ◽  
Shaoming Huang
Keyword(s):  
Photonic Crystals ◽  
Self Assembly ◽  
Short Range ◽  
Colloidal Particles ◽  
Structural Color ◽  
Color Displays ◽  
Potential Applications

Amorphous photonic crystals (APCs) with angle-independent structural color, only short-range ordered and isotropic structures are highly desired due to their potential applications in non-fadeless pigments, color displays, sensors and optical...

scholarly journals Color from hierarchy: Diverse optical properties of micron-sized spherical colloidal assemblies

2015 ◽  
Vol 112 (35) ◽  
pp. 10845-10850 ◽  
Author(s):  
Nicolas Vogel ◽  
Stefanie Utech ◽  
Grant T. England ◽  
Tanya Shirman ◽  
Katherine R. Phillips ◽  
...  
Keyword(s):  
Self Assembly ◽  
Colloidal Particles ◽  
Building Blocks ◽  
Bragg Diffraction ◽  
Structural Color ◽  
Emulsion Droplet ◽  
Multiple Length Scales ◽  
Optical Effects ◽  
The Individual ◽  
Diffraction Effects

Materials in nature are characterized by structural order over multiple length scales have evolved for maximum performance and multifunctionality, and are often produced by self-assembly processes. A striking example of this design principle is structural coloration, where interference, diffraction, and absorption effects result in vivid colors. Mimicking this emergence of complex effects from simple building blocks is a key challenge for man-made materials. Here, we show that a simple confined self-assembly process leads to a complex hierarchical geometry that displays a variety of optical effects. Colloidal crystallization in an emulsion droplet creates micron-sized superstructures, termed photonic balls. The curvature imposed by the emulsion droplet leads to frustrated crystallization. We observe spherical colloidal crystals with ordered, crystalline layers and a disordered core. This geometry produces multiple optical effects. The ordered layers give rise to structural color from Bragg diffraction with limited angular dependence and unusual transmission due to the curved nature of the individual crystals. The disordered core contributes nonresonant scattering that induces a macroscopically whitish appearance, which we mitigate by incorporating absorbing gold nanoparticles that suppress scattering and macroscopically purify the color. With increasing size of the constituent colloidal particles, grating diffraction effects dominate, which result from order along the crystal’s curved surface and induce a vivid polychromatic appearance. The control of multiple optical effects induced by the hierarchical morphology in photonic balls paves the way to use them as building blocks for complex optical assemblies—potentially as more efficient mimics of structural color as it occurs in nature.

scholarly journals Self-Assembly of Shape-Tunable Oblate Colloidal Particles into Orientationally Ordered Crystals, Glassy Crystals and Plastic Crystals

Soft Matter ◽  
2021 ◽  
Author(s):  
Jiawei Lu ◽  
Xiangyu Bu ◽  
Xinghua Zhang ◽  
Bing Liu
Keyword(s):  
Crystal Structures ◽  
Self Assembly ◽  
Colloidal Particles ◽  
Building Blocks ◽  
Fundamental Question ◽  
The Self ◽  
Plastic Crystals ◽  
Self Assembled ◽  
Glassy Crystals ◽  
The Relationship

The shapes of colloidal particles are crucial to the self-assembled superstructures. Understanding the relationship between the shapes of building blocks and the resulting crystal structures is an important fundamental question....

Size-Dependent Separation of Colloidal Particles In Two-Dimensional Convective Self-Assembly

Langmuir ◽  
1995 ◽  
Vol 11 (8) ◽  
pp. 2975-2978 ◽  
Author(s):  
Mariko Yamaki ◽  
Junichi Higo ◽  
Kuniaki Nagayama
Keyword(s):  
Self Assembly ◽  
Colloidal Particles ◽  
Two Dimensional ◽  
Size Dependent

scholarly journals Aggregation kinetics of irreversible patches coupled with reversible isotropic interaction leading to chains, bundles and globules

2018 ◽  
Vol 90 (6) ◽  
pp. 1085-1098 ◽  
Author(s):  
Isha Malhotra ◽  
Sujin B. Babu
Keyword(s):  
Self Assembly ◽  
Patch Size ◽  
Colloidal Particles ◽  
Volume Fraction ◽  
Interaction Strength ◽  
Colloidal System ◽  
Angle Distribution ◽  
Volume Fractions ◽  
Low Volume ◽  
A Chain

Abstract In the present study we are performing simulation of simple model of two patch colloidal particles undergoing irreversible diffusion limited cluster aggregation using patchy Brownian cluster dynamics. In addition to the irreversible aggregation of patches, the spheres are coupled with isotropic reversible aggregation through the Kern–Frenkel potential. Due to the presence of anisotropic and isotropic potential we have also defined three different kinds of clusters formed due to anisotropic potential and isotropic potential only as well as both the potentials together. We have investigated the effect of patch size on self-assembly under different solvent qualities for various volume fractions. We will show that at low volume fractions during aggregation process, we end up in a chain conformation for smaller patch size while in a globular conformation for bigger patch size. We also observed a chain to bundle transformation depending on the attractive interaction strength between the chains or in other words depending on the quality of the solvent. We will also show that bundling process is very similar to nucleation and growth phenomena observed in colloidal system with short range attraction. We have also studied the bond angle distribution for this system, where for small patches only two angles are more probable indicating chain formation, while for bundling at very low volume fraction a tail is developed in the distribution. While for the case of higher patch angle this distribution is broad compared to the case of low patch angles showing we have a more globular conformation. We are also proposing a model for the formation of bundles which are similar to amyloid fibers using two patch colloidal particles.

scholarly journals Feedback control for defect-free alignment of colloidal particles

Lab on a Chip ◽  
2018 ◽  
Vol 18 (14) ◽  
pp. 2099-2110 ◽  
Author(s):  
Yu Gao ◽  
Richard Lakerveld
Keyword(s):  
Feedback Control ◽  
Microfluidic Device ◽  
Self Assembly ◽  
Colloidal Particles ◽  
Control Method ◽  
Feedback Control Method

A novel feedback control method to align colloidal particles reliably via directed self-assembly in a microfluidic device is presented.

Laser-accelerated self-assembly of colloidal particles at the water–air interface

2017 ◽  
Vol 15 (5) ◽  
pp. 051401-51405 ◽  
Author(s):  
Mincheng Zhong Mincheng Zhong ◽  
Ziqiang Wang Ziqiang Wang ◽  
and Yinmei Li and Yinmei Li
Keyword(s):  
Self Assembly ◽  
Colloidal Particles ◽  
Air Interface
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