Design of two-dimensional/three-dimensional composite porous alumina by colloidal crystal templating and subsequent anodization

2005 ◽  
Vol 87 (10) ◽  
pp. 103102 ◽  
Author(s):  
Hidetaka Asoh ◽  
Sachiko Ono
Keyword(s):  
Colloidal Crystal ◽  
Porous Alumina ◽  
Three Dimensional ◽  
Two Dimensional ◽  
Colloidal Crystal Templating

scholarly journals Effects of Crystallinity on the Photocatalytic Polymerization of 3,4-Ethylenedioxythiophene over CsPbBr3 Inverse Opals

Catalysts ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1331
Author(s):  
Siwei Zhao ◽  
Shaohua Jin ◽  
Huanmin Liu ◽  
Shengfu Li ◽  
Kun Chen
Keyword(s):  
Colloidal Crystal ◽  
Three Dimensional ◽  
Inverse Opal ◽  
Porous Structures ◽  
Novel Approach ◽  
Transmission Electron ◽  
Hierarchical Porous ◽  
Antisolvent Crystallization ◽  
Colloidal Crystal Templating ◽  
High Absorption Coefficient

Due to their high absorption coefficient and long carrier lifetime, halide perovskites are promising candidates for photocatalysts. For this study, the antisolvent crystallization protocol and the colloidal crystal templating approach were combined to fabricate the highly crystalline cesium lead bromide perovskite with inverse opal morphology (IO-CsPbBr3). Scanning electron microscopy and transmission electron microscope images demonstrate the three-dimensional well-ordered porous structures of the IO-CsPbBr3 and their single-crystalline features. The presented approach not only provides hierarchical porous structures but also enhances overall crystallinity. When used as catalysts to promote the polymerization of 2,2′,5′,2″-ter-3,4-ethylenedioxythiophene, the highly crystalline IO-CsPbBr3 exhibits a superior photocatalytic performance compared to its polycrystalline counterpart. Furthermore, the morphology and the crystalline structure of the highly crystalline IO-CsPbBr3 are well preserved under photocatalytic conditions. This novel approach enables the preparation of a halide perovskite inverse opal with high crystallinity.

Direct Transcription of Two-Dimensional Colloidal Crystal Arrays into Three-Dimensional Photonic Crystals

2012 ◽  
Vol 23 (9) ◽  
pp. 1164-1171 ◽  
Author(s):  
Alexandru Vlad ◽  
Andreas Frölich ◽  
Thomas Zebrowski ◽  
Constantin Augustin Dutu ◽  
Kurt Busch ◽  
...  
Keyword(s):  
Photonic Crystals ◽  
Colloidal Crystal ◽  
Three Dimensional ◽  
Two Dimensional ◽  
Direct Transcription

Two- and Three-Dimensional Ordered Structures of Hollow Silver Spheres Prepared by Colloidal Crystal Templating

2004 ◽  
Vol 16 (5) ◽  
pp. 417-422 ◽  
Author(s):  
Z. Chen ◽  
P. Zhan ◽  
Z. L. Wang ◽  
J. H. Zhang ◽  
W. Y. Zhang ◽  
...  
Keyword(s):  
Colloidal Crystal ◽  
Three Dimensional ◽  
Ordered Structures ◽  
Colloidal Crystal Templating ◽  
Silver Spheres

Three-Dimensional Colloidal Crystal-Assisted Lithography for Two-Dimensional Patterned Arrays

Langmuir ◽  
2007 ◽  
Vol 23 (21) ◽  
pp. 10725-10731 ◽  
Author(s):  
Zhiqiang Sun ◽  
Yunfeng Li ◽  
Yanfang Wang ◽  
Xin Chen ◽  
Junhu Zhang ◽  
...  
Keyword(s):  
Colloidal Crystal ◽  
Three Dimensional ◽  
Two Dimensional

Colloidal Crystal Templating of Two-Dimensional Ordered Macroporous SiCN Ceramics

2008 ◽  
Vol 135 ◽  
pp. 27-30 ◽  
Author(s):  
In Hyuck Song ◽  
Yong Jin Kim ◽  
Hai Doo Kim ◽  
Dong Pyo Kim
Keyword(s):  
Colloidal Silica ◽  
Colloidal Crystal ◽  
Low Molecular Weight ◽  
Two Dimensional ◽  
Preceramic Polymer ◽  
Si Substrates ◽  
N2 Atmosphere ◽  
Colloidal Crystal Templating ◽  
Ordered Macroporous ◽  
Silica Crystals

In this study, two-dimensional (2D) ordered macroporous SiCN ceramics were prepared by infiltrating sacrificial colloidal silica (SiO2) templates with the low molecular weight preceramic polymer, polysilazane. This was followed by a thermal curing step, pyrolysis at 1250°C in a N2 atmosphere, and finally the removal of the templates by etching with diluted HF. In particular, 100large-scale monolayer silica crystals were prepared on the cleaned Si substrates by spin coating. Two-dimensional SiCN ordered pore arrays were fabricated by a solution-dipping template strategy.

High Resolution Microscopy of Multi-Layered Biological Crystals

1982 ◽  
Vol 40 ◽  
pp. 80-83
Author(s):  
H.A. Cohen ◽  
T.W. Jeng ◽  
W. Chiu
Keyword(s):  
High Resolution ◽  
Low Dose ◽  
Three Dimensional ◽  
Data Interpretation ◽  
Two Dimensional ◽  
Biological Objects ◽  
Density Maps ◽  
Density Map ◽  
Complex Crystal ◽  
High Resolution Microscopy

This tutorial will discuss the methodology of low dose electron diffraction and imaging of crystalline biological objects, the problems of data interpretation for two-dimensional projected density maps of glucose embedded protein crystals, the factors to be considered in combining tilt data from three-dimensional crystals, and finally, the prospects of achieving a high resolution three-dimensional density map of a biological crystal. This methodology will be illustrated using two proteins under investigation in our laboratory, the T4 DNA helix destabilizing protein gp32*I and the crotoxin complex crystal.

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