scholarly journals Anisotropic structural color particles from colloidal phase separation

2020 ◽  
Vol 6 (2) ◽  
pp. eaay1438 ◽  
Author(s):  
Huan Wang ◽  
Yuxiao Liu ◽  
Zhuoyue Chen ◽  
Lingyu Sun ◽  
Yuanjin Zhao
Keyword(s):  
Colloidal Crystal ◽  
Structural Color ◽  
Inverse Opal ◽  
Phase Separations ◽  
Structural Colors ◽  
Structure Morphology ◽  
Dynamic Cell ◽  
Cell Monitoring ◽  
Colloid Nanoparticles ◽  
Component Phase

Structural color materials have been studied for decades because of their fascinating properties. Effects in this area are the trend to develop functional structural color materials with new components, structures, or morphologies for different applications. In this study, we found that the coassembled graphene oxide (GO) and colloid nanoparticles in droplets could form component phase separations, and thus, previously unknown anisotropic structural color particles (SCPs) with hemispherical colloidal crystal cluster and oblate GO component could be achieved. The anisotropic SCPs, as well as their inverse opal hydrogel derivatives, were endowed with brilliant structural colors and controllable capabilities of fixation, location, orientation, and even responsiveness due to their specific structure, morphology, and components. We have also demonstrated that the anisotropic hydrogel SCPs with these features were ideal candidates for dynamic cell monitoring and sensing. These properties indicate that the anisotropic SCPs and their derivatives have huge potential values in biomedical areas.

scholarly journals Stomatocyte structural color-barcode micromotors for multiplex assays

2019 ◽  
Vol 7 (3) ◽  
pp. 644-651 ◽  
Author(s):  
Lijun Cai ◽  
Huan Wang ◽  
Yunru Yu ◽  
Feika Bian ◽  
Yu Wang ◽  
...  
Keyword(s):  
Biomedical Applications ◽  
Colloidal Crystal ◽  
Structural Color ◽  
Multiplex Detection ◽  
Color Coding ◽  
Functional Elements ◽  
Structural Colors ◽  
Multiplex Assays ◽  
Magnetic Elements ◽  
Extracting Solvent

Abstract Artificial micromotors have a demonstrated value in the biomedical area. Attempts to develop this technology tend to impart micromotors with novel functions to improve the values. Herein, we present novel structural color-barcode micromotors for the multiplex assays. We found that, by rapidly extracting solvent and assembling monodispersed nanoparticles in droplets, it could form stomatocyte colloidal crystal clusters, which not only showed striking structural colors and characteristic reflection peaks due to their ordered nanoparticles arrangement, but also provided effective cavities for the integration of functional elements. Thus, the micromotors with catalysts or magnetic elements in their cavities, as well as with the corresponding structural color coding, could be achieved by using the platinum and ferric oxide dispersed pre-gel to fill and duplicate the stomatocyte colloidal crystal clusters. We have demonstrated that the self-movement of these structural color-barcode micromotors could efficiently accelerate the mixing speed of the detection sample and greatly increase the probe–target interactions towards faster and more sensitive single or multiplex detection, and the magnetism of these barcode micromotors enables the flexible collection of the micromotors, which could facilitate the detection processes. These features make the stomatocyte structural color-barcode micromotors ideal for biomedical applications.

Graphene hybrid colloidal crystal arrays with photo-controllable structural colors

Nanoscale ◽  
2019 ◽  
Vol 11 (22) ◽  
pp. 10846-10851 ◽  
Author(s):  
Fanfan Fu ◽  
Zhuoyue Chen ◽  
Huan Wang ◽  
Cihui Liu ◽  
Yuxiao Liu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Colloidal Crystal ◽  
Structural Color ◽  
Structural Colors

Graphene oxide was introduced into non-close-packed colloidal crystal arrays for constructing intelligent structural color materials with photo-responsive features.

scholarly journals Bio-inspired self-healing structural color hydrogel

2017 ◽  
Vol 114 (23) ◽  
pp. 5900-5905 ◽  
Author(s):  
Fanfan Fu ◽  
Zhuoyue Chen ◽  
Ze Zhao ◽  
Huan Wang ◽  
Luoran Shang ◽  
...  
Keyword(s):  
Functional Materials ◽  
Composite Hydrogel ◽  
Covalent Attachment ◽  
Structural Color ◽  
Inverse Opal ◽  
Self Healing ◽  
Structural Colors ◽  
Inverse Opal Structure ◽  
Reversible Covalent ◽  
The Stability

Biologically inspired self-healing structural color hydrogels were developed by adding a glucose oxidase (GOX)- and catalase (CAT)-filled glutaraldehyde cross-linked BSA hydrogel into methacrylated gelatin (GelMA) inverse opal scaffolds. The composite hydrogel materials with the polymerized GelMA scaffold could maintain the stability of an inverse opal structure and its resultant structural colors, whereas the protein hydrogel filler could impart self-healing capability through the reversible covalent attachment of glutaraldehyde to lysine residues of BSA and enzyme additives. A series of unprecedented structural color materials could be created by assembling and healing the elements of the composite hydrogel. In addition, as both the GelMA and the protein hydrogels were derived from organisms, the composite materials presented high biocompatibility and plasticity. These features of self-healing structural color hydrogels make them excellent functional materials for different applications.

Bio-inspired thermal-responsive inverse opal films with dual structural colors based on liquid crystal elastomer

2015 ◽  
Vol 3 (17) ◽  
pp. 4424-4430 ◽  
Author(s):  
Huihui Xing ◽  
Jun Li ◽  
Jinbao Guo ◽  
Jie Wei
Keyword(s):  
Liquid Crystal ◽  
Inverse Opal ◽  
Liquid Crystal Elastomer ◽  
Structural Colors ◽  
Thermal Switching ◽  
Liquid Crystal Elastomers

The fabrication of inverse opal micropatterns based on liquid crystal elastomers with dual structural colors and their thermal switching behaviors are described.

Fe3+-doped SnO2 inverse opal with high structural color saturation

2019 ◽  
Vol 54 (15) ◽  
pp. 10609-10619 ◽  
Author(s):  
Fangfang Liu ◽  
Zhanming Gao ◽  
Jin Hu ◽  
Yao Meng ◽  
Shufen Zhang ◽  
...  
Keyword(s):  
Structural Color ◽  
Inverse Opal ◽  
Color Saturation

Bio-inspired angle-independent structural color films with anisotropic colloidal crystal array domains

Nano Research ◽  
2019 ◽  
Vol 12 (7) ◽  
pp. 1579-1584 ◽  
Author(s):  
Zhuohao Zhang ◽  
Zhuoyue Chen ◽  
Lingyu Sun ◽  
Xiaoxuan Zhang ◽  
Yuanjin Zhao
Keyword(s):  
Colloidal Crystal ◽  
Structural Color

SEM and TEM of Metallic Inverse Opals

2000 ◽  
Vol 6 (S2) ◽  
pp. 70-71
Author(s):  
C.F. Blanford ◽  
H.W. Yan ◽  
A. Stein ◽  
C.B. Carter
Keyword(s):  
Hydrofluoric Acid ◽  
Colloidal Crystal ◽  
Porous Solids ◽  
Wall Structure ◽  
Silica Spheres ◽  
Inverse Opal ◽  
Inverse Opals ◽  
Synthetic Opals ◽  
Monodisperse Spheres ◽  
Polymer Spheres

Drawing on nature, synthetic opals (e.g., gilsonite) consist of uniformly sized ceramic spheres ordered into large close-packed domains. In order to improve the toughness or appearance of these chemically bonded ceramics, a polymer is often infiltrated into the interconnected space between the packed spheres. In a similar fashion, colloidal crystal arrays of submicrometer silica or polymer spheres have been employed as templates for periodic porous solids. All the methods for preparing periodic macroporous materials share a common synthetic thread: first, the colloidal crystals are formed from monodisperse spheres; next, the void spaces are filled and solidified; finally, the template is removed by heat, by refluxing in a solvent such as THF (in the case of polymer spheres), or by soaking in hydrofluoric acid (in the case of silica spheres). The product, which can be thought of as an “inverse opal,” often exhibits the same iridescence as a natural opal due to the similarity between the periodicity of the wall structure and the wavelength of light.

Synthesis of Magnetic Composite Particles of γ-Fe2O3@SiO2and the Control of the Structural Color of the Colloidal Crystal by Magnetic Fields

2004 ◽  
Vol 33 (9) ◽  
pp. 1106-1107 ◽  
Author(s):  
Kazutoshi Kitajima ◽  
Toma Fujita ◽  
Norihito Sogoshi ◽  
Seiichiro Nakabayashi
Keyword(s):  
Magnetic Fields ◽  
Colloidal Crystal ◽  
Structural Color ◽  
Composite Particles ◽  
Magnetic Composite

Structural and optical characterization of 3D binary colloidal crystal and inverse opal films prepared by direct co-deposition

2008 ◽  
Vol 18 (9) ◽  
pp. 981 ◽  
Author(s):  
Jianjun Wang ◽  
Stefanie Ahl ◽  
Qin Li ◽  
Maximilian Kreiter ◽  
Thomas Neumann ◽  
...  
Keyword(s):  
Colloidal Crystal ◽  
Optical Characterization ◽  
Inverse Opal
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