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 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.

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 Graphene Oxide/Reduced Graphene Oxide Enhanced Noniridescent Structural Colors Based on Silica Photonic Spray Paints with Improved Mechanical Robustness

Nanomaterials ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 949
Author(s):  
Jiali Yu ◽  
Cheng-Hao Lee ◽  
Chi-Wai Kan
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Butyl Acrylate ◽  
Light Spectrum ◽  
Time Saving ◽  
Abrasive Resistance ◽  
Practical Applications ◽  
Structural Colors ◽  
Color Saturation ◽  
Reduced Graphene

In contrast to traditional pigment colors, structural colors have developed a great potential in practical applications, thanks to their unique nonfading and color tunable properties; especially amorphous photonic structures with noniridescent structural colors have attracted considerable attention and their applications have expanded to more fields. Herein, graphene oxide (GO) and reduced graphene oxide (RGO) enhanced noniridescent structural colors with excellent mechanical robustness were established by a time-saving approach named spray coating, which allows for rapid fabrication of angular independent structural colors by spraying different photonic spray paints (PSPs) to ensure color multiplicity that was adjusted by the silica nanoparticles (SiO2 NPs) sizes onto the substrates. The incorporation of poly(methyl methacrylate-butyl acrylate) (PMB) improved the adhesion existing among SiO2 inter-nanoparticles and between SiO2 NPs and the substrates, taking advantages of the low glass transition temperature (Tg) of butyl acrylate derivative polymer and made PMB embedded PSPs coated patterns being imparted with good mechanical robustness and abrasive resistance. The peculiar light adsorption of GO and RGO across visible light spectrum facilitate higher color saturation. The improvement in color saturation of GO and RGO doped PSPs is expected to boost the promising applications in structurally colored paintings, inks and other color-related optical fields.

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

scholarly journals Photonic Crystals: Tunable Design of Structural Colors Produced by Pseudo-1D Photonic Crystals of Graphene Oxide (Small 25/2016)

Small ◽  
2016 ◽  
Vol 12 (25) ◽  
pp. 3432-3432
Author(s):  
Liping Tong ◽  
Wei Qi ◽  
Mengfan Wang ◽  
Renliang Huang ◽  
Rongxin Su ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Photonic Crystals ◽  
Structural Colors

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

scholarly journals Rapid active-reflection display on dorsal stripes of Atherinomorus lacunosus

2021 ◽  
Author(s):  
Masakazu Iwasaka
Keyword(s):  
Magnetic Field ◽  
Light Exposure ◽  
Low Energy ◽  
Intensity Change ◽  
Structural Color ◽  
Dorsal Part ◽  
Structural Colors ◽  
Environmental Light ◽  
Low Energy Consumption ◽  
Detailed Function

AbstractA large number of living creatures are able to use environmental light effectively as a biological display. The biological structural colors are very attractive not only within the coloring species but also to humans. However, the detailed function of bio-reflectors, which constitute the structural color with respect to communication, remains unknown. Atherinomorus lacunosus has alignments of iridophore spots on its dorsal part. Here it is found that a spot with a diameter of approximately 0.1 mm causes a rhythmic blinking of light owing to rapid reflection changes in iridophores existing inside the spot. The iridophores contain reflecting particles which show similar rotational responses to magnetic field under a light exposure. The speed of the intensity change of light at a frequency of approximately 1 Hz is proposed to be controlled by the nervous system of A. lacunosus. This kind of passive illumination may contribute to the development of a new optical device with low energy consumption.

scholarly journals Development of New Catalytic Pigments: Dual Functional SiO2/TiO2-x Amorphous Photonic Crystals for Non-Iridescent Structural Color and Enhanced Photocatalytic Activity

2021 ◽  
Author(s):  
Li Feng ◽  
Fen Wang ◽  
Ze Xu ◽  
Hongjie Luo ◽  
Ting Zhao ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Photonic Crystals ◽  
Slow Light ◽  
Scattered Light ◽  
Biomimetic Synthesis ◽  
Structural Color ◽  
Utilization Rate ◽  
Full Spectrum ◽  
Structural Colors ◽  
Color Saturation

Abstract Biomimetic synthesis of amorphous photonic crystals (APCs) is a significant approach to obtain non-iridescent structural colors. However, the structural colors of artificially prepared APCs are dim or even white due to the influence of incoherent scattering. In this paper, we present an innovative method was proposed to combine APCs with black TiO2-x to construct non-iridescent structural color pigments with high visibility and photocatalytic activity. Due to absorption of incoherent scattered light by black TiO2-x, the color saturation of structural colors has been significantly increased. In addition, the utilization rate of photogenic carriers was effectively enhanced by slow light effect generated from pseudo-band gap of SiO2 APCs with TiO2-x absorbed full spectrum. The tone and color saturation of catalytic pigments are controlled by the diameter of SiO2 nanospheres and the ration of TiO2-x nanoparticles, which provides a controllable application study in color related fields such as artwork, environmental coatings and textiles.

scholarly journals Iridescence-controlled and flexibly tunable retroreflective structural color film for smart displays

2019 ◽  
Vol 5 (8) ◽  
pp. eaaw8755 ◽  
Author(s):  
Wen Fan ◽  
Jing Zeng ◽  
Qiaoqiang Gan ◽  
Dengxin Ji ◽  
Haomin Song ◽  
...  
Keyword(s):  
Traffic Safety ◽  
White Light ◽  
Energy Efficient ◽  
Diffuse Reflection ◽  
Structural Color ◽  
Polymer Microspheres ◽  
Color Film ◽  
Reflective Displays ◽  
Structural Colors

Structural color materials, which use nano- or microstructures to reflect specific wavelengths of ambient white light, have drawn much attention owing to their wide applications ranging from optoelectronics, coatings, to energy-efficient reflective displays. Although various structural color materials based on specular or diffuse reflection have been demonstrated, neither efficient retroreflective structural colors nor iridescent and non-iridescent colors to different observers simultaneously were reported by existing artificial or natural structural color materials. Here, we show that by partially embedding a monolayer of polymer microspheres on the sticky side of a transparent tape, the spontaneously formed interferometric structure on the surface of air-cushioned microspheres can lead to unique structural colors that remain non-iridescent under coaxial illumination and viewing conditions, but appear iridescent under noncoaxial illumination and viewing conditions. Our findings demonstrate a smart, energy-efficient, and tunable retroreflective structural color material that is especially suitable for nighttime traffic safety and advertisement display applications.

Sign in / Sign up

Export Citation Format

Share Document