A superplastic covalent crystal composite

Nature ◽  
1990 ◽  
Vol 344 (6265) ◽  
pp. 421-423 ◽  
Author(s):  
F. Wakai ◽  
Y. Kodama ◽  
S. Sakaguchi ◽  
N. Murayama ◽  
K. Izaki ◽  
...  
Keyword(s):  
Covalent Crystal ◽  
Crystal Composite

scholarly journals Electrical properties of a liquid crystal dispersed in an electrospun cellulose acetate network

2018 ◽  
Vol 9 ◽  
pp. 155-163 ◽  
Author(s):  
Doina Manaila Maximean ◽  
Octavian Danila ◽  
Pedro L Almeida ◽  
Constantin Paul Ganea
Keyword(s):  
Liquid Crystal ◽  
Cellulose Acetate ◽  
Indium Tin Oxide ◽  
Electric Energy ◽  
Equivalent Model ◽  
Electrical Characteristics ◽  
Impedance Measurements ◽  
Polymer Dispersed Liquid Crystals ◽  
Polymer Dispersed ◽  
Crystal Composite

Electro-optical devices that work in a similar fashion as PDLCs (polymer-dispersed liquid crystals), produced from cellulose acetate (CA) electrospun fibers deposited onto indium tin oxide coated glass and a nematic liquid crystal (E7), were studied. CA and the CA/liquid crystal composite were characterized by multiple investigation techniques, such as polarized optical microscopy, dielectric spectroscopy and impedance measurements. Dielectric constant and electric energy loss were studied as a function of frequency and temperature. The activation energy was evaluated and the relaxation time was obtained by fitting the spectra of the dielectric loss with the Havriliak–Negami functions. To determine the electrical characteristics of the studied samples, impedance measurements results were treated using the Cole–Cole diagram and the three-element equivalent model.

Wave Propagation in Microstretch Thermoelastic Plate Bordered with Layers of Inviscid Liquid

2009 ◽  
Vol 5 (2) ◽  
pp. 171-184 ◽  
Author(s):  
Rajneesh Kumar ◽  
Geeta Partap
Keyword(s):  
Short Wavelength ◽  
Wave Mode ◽  
Free Vibrations ◽  
Inviscid Liquid ◽  
Conducting Plate ◽  
Symmetric Wave ◽  
Secular Equations ◽  
Thermoelastic Plate ◽  
Thermally Conducting ◽  
Crystal Composite

The propagation of free vibrations in microstretch thermoelastic homogeneous isotropic, thermally conducting plate bordered with layers of inviscid liquid on both sides subjected to stress free thermally insulated and isothermal conditions is investigated in the context of Lord and Shulman (L‐S) and Green and Lindsay (G‐L) theories of thermoelasticity. The secular equations for symmetric and skewsymmetric wave mode propagation are derived. The regions of secular equations are obtained and short wavelength waves of the secular equations are also discussed. At short wavelength limits, the secular equations reduce to Rayleigh surface wave frequency equations. Finally, the numerical solution is carried out for magnesium crystal composite material plate bordered with water. The dispersion curves for symmetric and skew‐symmetric wave modes are computed numerically and presented graphically.

An optically stable and tunable quantum dot nanocrystal-embedded cholesteric liquid crystal composite laser

2014 ◽  
Vol 2 (22) ◽  
pp. 4388-4394 ◽  
Author(s):  
Lin-Jer Chen ◽  
Jia-De Lin ◽  
Chia-Rong Lee
Keyword(s):  
Liquid Crystal ◽  
Quantum Dot ◽  
Cholesteric Liquid Crystal ◽  
Azobenzene Moiety ◽  
Optical Stability ◽  
Composite Laser ◽  
Crystal Composite

This work demonstrates the first quantum-dot-embedded cholesteric liquid crystal composite laser with an added chiral-azobenzene moiety which possesses optical stability and reversible tunability.

scholarly journals Production of Intensifying Blue Light by Cherenkov Radiation Phenomena and Their Use as Power Source Applications

2021 ◽  
Author(s):  
Shima El-Shemy ◽  
Mostafa Eissa ◽  
Aly Arafa
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystals ◽  
Aluminum Oxide ◽  
Titanium Oxide ◽  
Blue Light ◽  
Cherenkov Radiation ◽  
Power Source ◽  
One Dimension ◽  
Crystal Composite ◽  
High Reflectance

Abstract It is interesting to note in recent years for a large number of researchers the topic of photonic crystals (PhCs) because of their new and useful properties. In addition, there are many advantages to photonic crystals materials as a high reflectance materials as well as the high transmittance materials based on the target application. The calculations were done for Aluminum oxide and titanium oxide (Al2O3/TiO2) composite photonic crystal in one dimension, which shows a high reflectivity (~ 99 %). The chosen photonic crystal composite can be useful to reflect the Cherenkov light many times which comes out from Cherenkov radiation by using radioisotope 90Sr-90Y. The output intensified light has power 1.45 µwatt and 1.45 nwatt for 90Sr-90Y with the activity 1Ci and 1mCi respectively, that can be used for micro/nano-power source applications.

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