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 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.

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

Affinity Adsorption of Bromelain on Reactive Red 120 Immobilized Magnetic Composite Particles

2011 ◽  
Vol 46 (3) ◽  
pp. 473-482 ◽  
Author(s):  
Ming-Min Song ◽  
Hua-Li Nie ◽  
Yu-Ting Zhou ◽  
Li-Min Zhu ◽  
Jin-Yue Bao
Keyword(s):  
Composite Particles ◽  
Magnetic Composite ◽  
Affinity Adsorption ◽  
Reactive Red 120

Synthesis of Loaded Silver 4A Zeolite Molecular Sieve with Magnetic Cores of SiO2/(γ-Fe2O3- SiO2) for Demercuration

2014 ◽  
Vol 881-883 ◽  
pp. 1144-1148
Author(s):  
Yue Qin Qiu ◽  
Lei Jia
Keyword(s):  
Key Words ◽  
Molecular Sieve ◽  
Absorption Rate ◽  
Magnetic Particles ◽  
Composite Particles ◽  
Magnetic Composite ◽  
Effective Solution ◽  
The Core ◽  
Magnetic Cores ◽  
4A Zeolite

It is an effective solution to the problem of agglomeration using the magnetic composite SiO2/(γ-Fe2O3- SiO2) instead of traditional magnetic particles Fe3O4as the core of molecular sieve. The traditional hydrothermal method was utilized by means of adding the magnetic composite particles SiO2/(γ-Fe2O3- SiO2) into the pre-made crystallization liquid. Then, a series of magnetic 4A zeolites with varying contents of SiO2/(γ-Fe2O3- SiO2) were synthesized under the condition of ultrasonic crystallization for 6 hours with the power of 100W and temperature of 70 °C . Afterwards, the characterization tests such as XRD,SEM,TG,IR were carried out; the final result showed that the performance of 4A zeolite molecular sieve with SiO2/(γ-Fe2O3- SiO2) is basically identical with the pure 4A zeolite molecular sieve. The absorption rate was 13.5927μg/g by using the 4A zeolite molecular sieve with SiO2/(γ-Fe2O3- SiO2) for the absorption of mercury. Key words: 4A zeolite molecular sieve; magnetic composite; silver loaded;Demercuration

Low-temperature synthesis of water-dispersible magnetic composite particles with high monodispersity

2016 ◽  
Vol 294 (12) ◽  
pp. 2079-2085 ◽  
Author(s):  
Chika Suwabe ◽  
Noriko Yamauchi ◽  
Daisuke Nagao ◽  
Haruyuki Ishii ◽  
Mikio Konno
Keyword(s):  
Low Temperature ◽  
Composite Particles ◽  
Magnetic Composite ◽  
Low Temperature Synthesis ◽  
Temperature Synthesis ◽  
Water Dispersible
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