Preparation of colloidal crystal template for inverse opal hydrogels

This paper presents a versatile method for fabricating 3D macroporous materials using colloidal crystals as the templates. ZnO and Cu2O were deposited by the electrochemical method via the colloidal crystal template. Not only were 3D inverse opal structures and 2D nanobowls fabricated, but nanoparticles with a controlled shape were also prepared. Morphological controls via colloidal crystal templating are discussed.

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Preparation of inverse opal adsorbent by water-soluble colloidal crystal template to obtain ultrahigh adsorption capacity for salicylic acid removal from aqueous solution

Journal of Hazardous Materials ◽

10.1016/j.jhazmat.2019.03.020 ◽

2019 ◽

Vol 371 ◽

pp. 362-369 ◽

Cited By ~ 2

Author(s):

Xiuli Wang ◽

Yingchun Guo ◽

Xueri Nan ◽

Shang Shi ◽

Xiaomei Wang ◽

...

Keyword(s):

Aqueous Solution ◽

Salicylic Acid ◽

Adsorption Capacity ◽

Colloidal Crystal ◽

Water Soluble ◽

Inverse Opal ◽

Colloidal Crystal Template

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Germanium FCC Structure from a Colloidal Crystal Template

Langmuir ◽

10.1021/la991412s ◽

2000 ◽

Vol 16 (10) ◽

pp. 4405-4408 ◽

Cited By ~ 63

Author(s):

H. Míguez ◽

F. Meseguer ◽

C. López ◽

M. Holgado ◽

G. Andreasen ◽

...

Keyword(s):

Colloidal Crystal ◽

Colloidal Crystal Template ◽

Fcc Structure

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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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SEM and TEM of Metallic Inverse Opals

Microscopy and Microanalysis ◽

10.1017/s1431927600032840 ◽

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.

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