Physics (PHY): Recent submissions
Now showing items 421-440 of 482
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Graphene And Carbon Nanotubes : Field Induced Doping, Interaction With Nucleobases, Confined Water And Sensors
(2010-12-08)This thesis presents experimental and related theoretical studies of single layer graphene, bilayer graphene and single walled carbon nanotubes. The thesis is divided into three parts; the first part describes the phonon ... -
Generalizations Of The Quantum Search Algorithm
(2010-12-03)Quantum computation has attracted a great deal of attention from the scientific community in recent years. By using the quantum mechanical phenomena of superposition and entanglement, a quantum computer can solve certain ... -
Phase Transitions And Relaxation Processes In Water And Glycerol-Water Binary Liquid Mixtures : Spin Probe ESR Sudies
(2010-11-18)A liquid Cooled below its normal freezing temperature is known as a supercooled liquid. On further cooling, supercooled liquids crystallize to thermodynamically stable, ordered structures. Alternatively, if the cooling ... -
X-Ray Crystallographic Studies Of Designed Peptides : Characterization Of Novel Secondary Structures Of Peptides Containing Conformationally Constrained α-, β- And γ-Amino Acids And Polymorphic Peptide Helices
(2010-10-21)Structural studies of peptides are of great importance in developing novel and effective biomaterials ranging from drugs and vaccines to nano materials with industrial applications. In addition, they provide model systems ... -
Synthesis, Optical And Photoelectrical Investigations On PbS nano-,micro-structures
(2010-10-21)The thesis describes the synthesis of PbS nano-, micro-structures by colloidal and hydrothermal techniques. Size and morphology dependent luminescence studies were carried out in detail. Application oriented studies like ... -
NMR Relaxation And Charge Transport In Conducting Polymers
(2010-10-14)Conducting and semiconducting polymers, consisting of delocalized π-electrons, have been studied for the past three decades. These materials have shown novel physical properties with interesting applications in batteries, ... -
Polarized Line Formation In Turbulent And Scattering Media
(2010-10-13)This thesis is devoted to improve our knowledge on the theory of polarized line formation in a magneto-turbulent medium, and in a scattering dominated magnetized medium, where partial redistribution (PRD) effects become ... -
Phase Behaviour & Dynamics Of An Agitated Monolayer Of Granular Rods
(2010-10-05)In this thesis we have explored the no equilibrium phase behavior and dynamics of an agitated monolayer of macroscopic rod-like particles. The main objective of this thesis was to highlight the ways in which even the ... -
Investigation Of Damage Process In Current Stressed Metal Film Using Noise Spectroscopy, Scanning Thermal Microscopy And Simulation Studies
(2010-09-27)Reliability, besides the performance, is one of the important key factors of success of any technology. While a product should perform at best as desired, it must also be capable of working for intended period of life ... -
An Investigation Of The Ferromagnetic Insulating State Of Manganites
(2010-09-22)Electrical conductance in the ferromagnetic insulating (FMI) phase of manganites has been experimentally investigated. The investigations were performed on single crystals of compositions La0.82Ca0.18MnO3 and Nd0.7Pb0.3MnO3. ... -
Magnetization, Magnetotransport And Electron Magnetic Resonance Studies Of Doped Praseodymium And Bismuth Based Charge Ordered Manganites
(2010-09-06)Studies on perovskite rare earth manganites of general formula R1-xAxMnO3 (where R is a trivalent rare earth ion such as La3+, Pr3+ etc. and A is a divalent alkaline earth ion such as Ca2+, Sr2+, Ba2+, have been a very ... -
Separated Local Field NMR Spectroscopy In Partially Ordered Systems - New Methodologies And Applications
(2010-09-06)Dipolar couplings are one of the major source of structural information. Due to their dependence on the distance between the nuclei and the angle of orientation of the dipolar vector with respect to the magnetic field, ... -
Gravitational Waves From Inspiralling Compact Binaries : 3PN Polarisations, Angular Momentum Flux And Applications To Astrophysics And Cosmology
(2010-09-03)Binary systems comprising of compact objects like neutron stars (NS) and/or black holes (BH) lose their energy and angular momentum via gravitational waves (GW). Radiation reaction due to the emission of GW results in a ... -
Critical Behavior On Approaching A Double Critical Point In A Complex Mixture
(2010-08-25)This thesis reports the results of light-scattering measurements and visual investigations of critical phenomena in the complex mixture 1-propanol (1P) + water (W) + potassium chloride (KCl) which has a special critical ... -
Dynamics, Order And Fluctuations In Active Nematics : Numerical And Theoretical Studies
(2010-08-24)In this thesis we studied theoretically and numerically dynamics, order and fluctuations in two dimensional active matter with specific reference to the nematic phase in collections of self-driven particles.The aim is to ... -
Orbital Evolution And Super-Orbital Flux Variations In X-ray Binary Pulsars
(2010-08-23)X-ray binaries are binary stellar systems containing a compact object and a normal companion star which are gravitationally bound and rotate about a common center of mass. The compact object accretes matter from the companion ... -
Spatially Resolved Studies Of Electronic Phase Separation And Microstructure Effects In Hole Dopped Manganites
(2010-08-17)The main focus of this thesis is in understanding the role of phase separation and microstructure in determining the physical properties of manganites. We also aim to be able to tune certain material properties using ... -
Growth, Structural And Physical Properties Of Certain Antimony Based III-V Diluted Magnetic Semiconductors
(2010-07-20)Semiconductor devices are the building blocks of electronics and communication technology in the modern world. The charge, mass and spin of charge carriers in the semiconductor devices lay the foundations of the technology ... -
Studies Of Spiral Turbulence And Its Control In Models Of Cardiac Tissue
(2010-07-15)There is a growing consensus that life-threatening cardiac arrhythmias like ventricular tachycardia (VT) or ventricular fibrillation (VF) arise because of the formation of spiral waves of electrical activation in cardiac ... -
Magnetization, Magnetotransport And Electron Magnetic Resonance Studies Of Certain Nanoscale Manganites
(2010-06-15)Perovskite rare-earth manganites of the form R1-xAxMnO3 (R – rare earth ion or Bi, A – Ca,Sr) have drawn an overwhelming research interest during the last few years owing to their extraordinary physical properties. Some ...