One-step preparation of polystyrene colloidal crystal films with structural colors and high hydrophobicity

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.

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Vivid structural colors with low angle dependence from long-range ordered photonic crystal films

Nanoscale ◽

10.1039/c6nr07523a ◽

2017 ◽

Vol 9 (9) ◽

pp. 3002-3009 ◽

Cited By ~ 26

Author(s):

Xin Su ◽

Hongbo Xia ◽

Shufen Zhang ◽

Bingtao Tang ◽

Suli Wu

Keyword(s):

Photonic Crystal ◽

Long Range ◽

Structural Colors ◽

Angle Dependence ◽

Crystal Films

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Melting of Colloidal Crystal Films

Physical Review Letters ◽

10.1103/physrevlett.104.205703 ◽

2010 ◽

Vol 104 (20) ◽

Cited By ~ 83

Author(s):

Y. Peng ◽

Z. Wang ◽

A. M. Alsayed ◽

A. G. Yodh ◽

Y. Han

Keyword(s):

Colloidal Crystal ◽

Crystal Films

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Anisotropic structural color particles from colloidal phase separation

Science Advances ◽

10.1126/sciadv.aay1438 ◽

2020 ◽

Vol 6 (2) ◽

pp. eaay1438 ◽

Cited By ~ 21

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.

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