Introduction to Liquid Crystals

MOHAMMAD IMRAN AZIZ
Assistant Professor
PHYSICS DEPARTMENT
SHIBLI NATIONAL COLLEGE, AZAMGARH (India).



Synergistic Effects of Surfactants

Observed when surfactants having relatively similar structure or ionic property are mixed
Resulted in the formation of liquid crystal structures or complexes at the interface by intermolecular interactions between surfactants
Examples
Anionic and nonionic in synthetic latex emulsion polymerisation,
Mixtu ....etc

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CHAPTER 1
Introduction
Today Environment pollution, Green House Gas Emission, Energy Crisis are some of the most discussed issues in the world than never before. It is estimated that 17 billion mega Watts of electricity is required in the world annually; 730 billion metric tonnes of Carbon-dioxide is released to the atmosphere in the world last year and numbers are growing. Some of the resultant effects are global warming, climatic changes which are not only affecting humans b ....etc

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A Theory of Anharmonic Lattice Statics for Analysis of Defective Crystals


In this topic we present a general theory of anharmonic lattice statics for analysis of defective complex lattices. This theory differs from the classical treatments of lattice statics in that it does not rely on knowledge of force constants for a limited number of nearest neighbor interactions. Instead, the only thing needed as input is an interatomic potential that models the interaction of atoms this theory takes into account the fact that close to defects force c ....etc

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its possible to generate the electricity from speed breaker using piezoelectric crystal? ....etc

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INTRODUCTION
Since the conventional solid gun propellants have reached the saturation level in terms of energy output, a need exists for the development of high performance propellants for futuristic gun ammunition to propel hypervelocity projectiles. Hypervelocity guns are the guns having muzzle velocity in excess of 2000 m/s. Modern tank guns have muzzle velocity in the range of 1600 “ 2000 m/s. With continuous improvement in armour technology, improved weapons with high muzzle velocity are under ....etc

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The Application of Back Propagation Neural Network of Multi-channel Piezoelectric Quartz Crystal Sensor for Mixed Organic Vapours

Abstract
A multi-channel piezoelectric quartz crystal sensor with a
homemade computer interface was prepared and employed in the
present study to detect mixture of organic molecules. Back
propagation neural network (BPN) was used to distinguish the
species in the mixture organic molecules and multivariate linear
regression analysis (MLR) was used to compute the concentration
of ....etc

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Prepared by:
Jaime Fernandez


Piezoelectric Notions
“Piezoelectricity is the ability of certain crystals to generate a voltage in response to applied mechanical stress. The word is derived from the Greek piezein, which means to squeeze or press. The piezoelectric effect is reversible in that piezoelectric crystals, when subjected to an externally applied voltage, can change shape by a small amount. The deformation, about 0.1% of the original dimension in PZT, is of the order of nanometers, but nevertheless ....etc

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I want advantages and disadvantages of smart material please give answer .... ....etc

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Prepared by:
Jaime Fernandez


Piezomotors “Ultrasonic Motors”
Piezoelectric Notions
“Piezoelectricity is the ability of certain crystals to generate a voltage in response to applied mechanical stress. The word is derived from the Greek piezein, which means to squeeze or press. The piezoelectric effect is reversible in that piezoelectric crystals, when subjected to an externally applied voltage, can change shape by a small amount. The deformation, about 0.1% of the original dimension in PZT, is ....etc

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nanotechnology based ANTIGLARE WINDSHIELD SYSTEM

Presented By:
PRASHANT PANDAY
VENKATESWARA RAO
CSE III YEAR
SAKTHI MARIMMAN ENGINEERING COLLEGE
THANDALM ,CHENNAI-602105
ABSTRACT:
Recently there have been a lot of accidents because of glare due to high intensity head lights. In our everyday life we have found it very difficult to drive the vehicles during the time of sunset. the major cause of accidents being due to disturbance in vision which are mostly physical. It has been found that the so calle ....etc

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Prepared by:
Jaime Fernandez


Piezomotors “Ultrasonic Motors”
Piezoelectric Notions
• “Piezoelectricity is the ability of certain crystals to generate a voltage in response to applied mechanical stress. The word is derived from the Greek piezein, which means to squeeze or press. The piezoelectric effect is reversible in that piezoelectric crystals, when subjected to an externally applied voltage, can change shape by a small amount. The deformation, about 0.1% of the original dimension in PZT ....etc

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A Theory of Anharmonic Lattice Statics for Analysis of Defective Crystals


In this topic we present a general theory of anharmonic lattice statics for analysis of defective complex lattices. This theory differs from the classical treatments of lattice statics in that it does not rely on knowledge of force constants for a limited number of nearest neighbor interactions. Instead, the only thing needed as input is an interatomic potential that models the interaction of atoms this theory takes into account the fact that close to defects force c ....etc

[:=Read Full Message Here=:]

In this topic we present a general theory of anharmonic lattice statics for analysis of defective complex lattices. This theory differs from the classical treatments of lattice statics in that it does not rely on knowledge of force constants for a limited number of nearest neighbor interactions. Instead, the only thing needed as input is an interatomic potential that models the interaction of atoms this theory takes into account the fact that close to defects force constants are different from those in the bulk crystal. This formulation of latt ....etc

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Organic material that has semiconductor properties. Semiconductivity is exhibited by single molecules, short chain (oligomers) and organic polymers. Semiconducting small molecules (aromatic hydrocarbons) include the polycyclic aromatic compounds pentacene, anthracene,and The environment of surface electrons at 'solid-to-liquid' interfaces is somewhat extreme, subjected to intense local electric fields or harsh chemical pressures that high-density ionic charge or polarization of mobile molecules create. In this proceedings, we argue functions of ....etc

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Engineering Seminar on Microphotonic Technology
Abstract

Microphotonic is an emerging field encompassing photonics, electro-optics, integrated opto -VLSI chips, broad-band photo-receiver arrays and related systems to manipulate, transmit and detect photons at microscopic level. The 21st century is sometimes noted as the Age of Light and indeed, optical technology has been adopted into our daily lives, with fiber optics-based broadband, LCD TVs, optical disks, illuminations, laser therapy, solar cells and more. In fact, optics contributes gr ....etc

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