Self assembly of large area 3D photonic crystals

2012 ◽  
Author(s):  
S Ahirwar ◽  
S Saxena ◽  
S Shukla
Keyword(s):  
Photonic Crystals ◽  
Self Assembly ◽  
Large Area

Fabrication of Photonic Crystals in Microchannels

2004 ◽  
Vol 817 ◽  
Author(s):  
Chun-Wen Kuo ◽  
Hui-Mei Hsieh ◽  
Jung-Chuan Ting ◽  
Yi-Hong Cho ◽  
Kung Hwa Wei ◽  
...  
Keyword(s):  
Photonic Crystals ◽  
Self Assembly ◽  
Colloidal Particles ◽  
Expansion Method ◽  
Large Area ◽  
Optical Components ◽  
Colloidal Photonic Crystals ◽  
Fabrication Procedure ◽  
Evaporation Induced Self Assembly ◽  
Easy Integration

AbstractWe have developed a fabrication procedure for growing photonic crystals in the lithographic defined microchannels, which enables easy integration with other planar optical components. This technique is based on the directed evaporation induced self-assembly of nanoparticles in the microchannels. Substrates with pre-patterned microchannels (30-100 μm wide) were dipped into solution of nanoparticles for several days. By controlling the evaporation rate, the meniscus contacting the microchannels will undergo evaporation-induced self-assembly. The capillary forces cause nanospheres to crystallize within the microchannels forming colloidal photonic crystals in the microchannels. Two types of colloidal particles, polystyrene and silica, have been employed to fabricate colloidal photonic crystals in the microchannels. Both types of colloidal particles were found to form large-area well-ordered colloidal single crystals in the microchannels. The optical reflection spectra from the (111) surfaces of the colloidal crystals formed by various sizes of nanoparticles have been measured. And the measured reflection peaks agree with the photonic bandgap calculated by the plane wave expansion method.

A simple self-assembly method for colloidal photonic crystals with a large area

2005 ◽  
Vol 286 (2) ◽  
pp. 573-578 ◽  
Author(s):  
Jianguo Deng ◽  
Xiaoming Tao ◽  
Pei Li ◽  
Pu Xue ◽  
Yihe Zhang ◽  
...  
Keyword(s):  
Photonic Crystals ◽  
Self Assembly ◽  
Large Area ◽  
Assembly Method ◽  
Colloidal Photonic Crystals

Thermal property of photonic crystals (PCs) prepared by solvent annealing self-assembly of bottlebrush PS-b-PtBA

Polymer ◽  
2020 ◽  
Vol 194 ◽  
pp. 122389 ◽  
Author(s):  
Tiantian Guo ◽  
Yi Wang ◽  
Yaping Qiao ◽  
Xiaoyan Yuan ◽  
Yunhui Zhao ◽  
...  
Keyword(s):  
Photonic Crystals ◽  
Thermal Property ◽  
Self Assembly ◽  
Solvent Annealing

scholarly journals Towards achieving a large-area and defect-free nano-line pattern via controlled self-assembly by sequential annealing

Giant ◽  
2021 ◽  
pp. 100078
Author(s):  
Tao Wen ◽  
Bo Ni ◽  
Yuchu Liu ◽  
Wei Zhang ◽  
Zi-Hao Guo ◽  
...  
Keyword(s):  
Self Assembly ◽  
Line Pattern ◽  
Large Area

Engineering the shape of Zinc Oxide crystals via sonochemical or hydrothermal solution-based methods

2008 ◽  
Vol 1087 ◽  
Author(s):  
Marco Palumbo ◽  
Simon J. Henley ◽  
Thierry Lutz ◽  
Vlad Stolojan ◽  
David Cox ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Self Assembly ◽  
Hydrothermal Solution ◽  
Good Control ◽  
Transparent Conductors ◽  
Zno Nanostructures ◽  
Large Area ◽  
Light Emitting Devices ◽  
Wide Range ◽  
Solution Methods

AbstractRecent results in the use of Zinc Oxide (ZnO) nano/submicron crystals in fields as diverse as sensors, UV lasers, solar cells, piezoelectric nanogenerators and light emitting devices have reinvigorated the interest of the scientific community in this material. To fully exploit the wide range of properties offered by ZnO, a good understanding of the crystal growth mechanism and related defects chemistry is necessary. However, a full picture of the interrelation between defects, processing and properties has not yet been completed, especially for the ZnO nanostructures that are now being synthesized. Furthermore, achieving good control in the shape of the crystal is also a very desirable feature based on the strong correlation there is between shape and properties in nanoscale materials. In this paper, the synthesis of ZnO nanostructures via two alternative aqueous solution methods - sonochemical and hydrothermal - will be presented, together with the influence that the addition of citric anions or variations in the concentration of the initial reactants have on the ZnO crystals shape. Foreseen applications might be in the field of sensors, transparent conductors and large area electronics possibly via ink-jet printing techniques or self-assembly methods.

scholarly journals Hydrogen Electrocatalysis: Self‐Assembly of Large‐Area 2D Polycrystalline Transition Metal Carbides for Hydrogen Electrocatalysis (Adv. Mater. 50/2018)

2018 ◽  
Vol 30 (50) ◽  
pp. 1870385 ◽  
Author(s):  
Xining Zang ◽  
Wenshu Chen ◽  
Xiaolong Zou ◽  
J. Nathan Hohman ◽  
Lujie Yang ◽  
...  
Keyword(s):  
Transition Metal ◽  
Self Assembly ◽  
Metal Carbides ◽  
Large Area ◽  
Transition Metal Carbides

Electron Microscopy Study of Submicron Size Antiferromagnetic KMnF3 Nanoparticles and Their Self-assembly

2003 ◽  
Vol 775 ◽  
Author(s):  
Jeffrey Anderson ◽  
Rubi Garcia ◽  
Weilie L. Zhou
Keyword(s):  
Electron Microscopy ◽  
Self Assembly ◽  
Room Temperature ◽  
Microscopy Study ◽  
Electron Microscopy Study ◽  
Submicron Particles ◽  
Spherical Particles ◽  
Large Area ◽  
Homogeneous Crystal ◽  
Field Emission Electron Microscopy

AbstractSubmicron KMnF3 cubic and spherical nanoparticles were synthesized using the reverse micelle method. The nanostructures of the nanocrystals were studied by field emission electron microscopy and transmission electron microscopy. KMnF3 nanocrystals synthesized at room temperature started with cubic submicron particles (∼100 nm) and consisted of KMnF3 nanocrystallites (10-15 nm). As the reaction continued, the nanocrystals fused together and transformed into perfect cubic nanocrystals. Spherical beads composed of KMnF3 nanocrystallites were observed at low temperature synthesis. As the reaction continued, the spherical particles grew larger, however, no characteristic cubic shape of KMnF3 nanoparticles were observed. Even as they grew larger, there was no evidence of homogeneous crystal morphology as seen in the room temperature samples. Cubic shape KMnF3 nanocrystals were self-assembled into large area self-assembling patterns.

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