Coordination-bond-driven fabrication of crack-free photonic crystals

2016 ◽  
Vol 4 (30) ◽  
pp. 7208-7214 ◽  
Author(s):  
X. D. Shi ◽  
W. Y. Liu ◽  
D. Zhao ◽  
X. T. Li ◽  
R. M. Dou ◽  
...  
Keyword(s):  
Photonic Crystals ◽  
Coordination Bond ◽  
Latex Spheres ◽  
Coordination Bonds

Centimeter-scale crack-free opal PC films are prepared in which the latex spheres are bound together through coordination bonds.

scholarly journals Crystal structure of tetraaqua(5,5′-dimethyl-2,2′-bipyridyl-κ2N,N′)iron(II) sulfate

2014 ◽  
Vol 70 (12) ◽  
pp. 544-546 ◽  
Author(s):  
Yamine Belamri ◽  
Fatima Setifi ◽  
Bojana M. Francuski ◽  
Sladjana B. Novaković ◽  
Setifi Zouaoui
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Coordination Bond ◽  
Octahedral Geometry ◽  
The Other ◽  
Distorted Octahedral Geometry ◽  
Cationic Complex ◽  
Centroid Distance ◽  
Distorted Octahedral ◽  
Coordination Bonds

In the title compound, [Fe(C12H12N2)(H2O)4]SO4, the central FeIIion is coordinated by two N atoms from the 5,5′-dimethyl-2,2′-bipyridine ligand and four water O atoms in a distorted octahedral geometry. The Fe—O coordination bond lengths vary from 2.080 (3) to 2.110 (3) Å, while the two Fe—N coordination bonds have practically identical lengths [2.175 (3) and 2.177 (3) Å]. The chelating N—Fe—N angle of 75.6 (1)° shows the largest deviation from an ideal octahedral geometry; the other coordination angles deviate from ideal values by 0.1 (1) to 9.1 (1)°. O—H...O hydrogen bonding between the four aqua ligands of the cationic complex and four O-atom acceptors of the anion leads to the formation of layers parallel to theabplane. Neighbouring layers further interact by means of C—H...O and π–π interactions involving the laterally positioned bipyridine rings. The perpendicular distance between π–π interacting rings is 3.365 (2) Å, with a centroid–centroid distance of 3.702 (3) Å.

Tough Photonic Crystals Fabricated by Photo-Crosslinkage of Latex Spheres

2009 ◽  
Vol 30 (7) ◽  
pp. 509-514 ◽  
Author(s):  
Entao Tian ◽  
Liying Cui ◽  
Jingxia Wang ◽  
Yanlin Song ◽  
Lei Jiang
Keyword(s):  
Photonic Crystals ◽  
Latex Spheres

scholarly journals Fabrication of Phase-Change Polymer Colloidal Photonic Crystals

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Tianyi Zhao ◽  
Youzhuan Zhang ◽  
Jingxia Wang ◽  
Yanlin Song ◽  
Lei Jiang
Keyword(s):  
Photonic Crystals ◽  
Phase Change ◽  
Stable Phase ◽  
Core Shell ◽  
Functional Coatings ◽  
Colloidal Photonic Crystals ◽  
Change Behavior ◽  
Latex Spheres ◽  
First Time

This paper presents the preparation of phase-change polymer colloidal photonic crystals (PCs) by assembling hollow latex spheres encapsulated with dodecanol for the first time. The monodispersed hollow latex spheres were obtained by phase reversion of monodispersed core-shell latex spheres in the n-hexane, which dissolves the PS core and retains the PMMA/PAA shell. The as-prepared phase-change colloidal PCs show stable phase-change behavior. This fabrication of phase-change colloidal PCs would be significant for PC’s applications in functional coatings and various optic devices.

Porous materials based on metal–nucleobase systems sustained by coordination bonds and base pairing interactions

CrystEngComm ◽  
2015 ◽  
Vol 17 (16) ◽  
pp. 3051-3059 ◽  
Author(s):  
Garikoitz Beobide ◽  
Oscar Castillo ◽  
Antonio Luque ◽  
Sonia Pérez-Yáñez
Keyword(s):  
Hydrogen Bond ◽  
Porous Materials ◽  
Coordination Bond ◽  
Base Pairing ◽  
Coordination Bonds ◽  
Pairing Interactions

Two approaches to metal–nucleobase porous materials: coordination bond sustained MOFs and hydrogen bond pairing based SMOFs.

Detection of viruses by electron microscopy: Increased sensitivity by direct micro-ultracentrifugation of samples

1987 ◽  
Vol 45 ◽  
pp. 908-909
Author(s):  
Alain R. Trudel ◽  
M. Trudel
Keyword(s):  
Electron Microscopy ◽  
Fold Increase ◽  
Observation Time ◽  
Clinical Samples ◽  
Maximum Speed ◽  
Viral Particles ◽  
Structural Details ◽  
Latex Spheres ◽  
Increased Sensitivity ◽  
Size Of Particles

AirfugeR (Beckman) direct ultracentrifugation of viral samples on electron microscopy grids offers a rapid way to concentrate viral particles or subunits and facilitate their detection and study. Using the A-100 fixed angle rotor (30°) with a K factor of 19 at maximum speed (95 000 rpm), samples up to 240 μl can be prepared for electron microscopy observation in a few minutes: observation time is decreased and structural details are highlighted. Using latex spheres to calculate the increase in sensitivity compared to the inverted drop procedure, we obtained a 10 to 40 fold increase in sensitivity depending on the size of particles. This technique also permits quantification of viral particles in samples if an aliquot is mixed with latex spheres of known concentration.Direct ultracentrifugation for electron microscopy can be performed on laboratory samples such as gradient or column fractions, infected cell supernatant, or on clinical samples such as urine, tears, cephalo-rachidian liquid, etc..

Elusive photonic crystals come a step closer

Nature ◽  
2020 ◽  
Vol 585 (7826) ◽  
pp. 506-507
Author(s):  
John C. Crocker
Keyword(s):  
Photonic Crystals
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