Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 44 for “"dipole interaction"”.
-
Resonant Dipole-Dipole Energy Transfer Dynamics in a Frozen Rydberg Gas
<p>The dipole-dipole interaction strongly couples ultracold highly excited atoms, known as Rydberg atoms, and is the dominant mechanism for energy exchange among such atoms on microsecond time scales. I present the results of experiments that investigate this interaction using rubidium atoms …
-
A Description of the Electrostatic Interactions of Fluorophores With Polar Solvents Based on A Gaussian Distribution of Interaction Energies (Danca, Prodan)
The dipole moments of a fluorophore in the ground and excited states arise from partial charges localized on specific parts of the molecule. These charges are considered to be monopoles which interact independently with solvent dipoles. The orientation of a solvent dipole with respect to each …
-
Super-resolution Control of Ultracold Dipolar Atoms on a 50-nm Scale
… large spin degree of freedom and long-range dipole-dipole interactions. In this thesis, following an introduction to the fundamental properties of Dy, we introduce the design and construction of an experimental apparatus that is capable of producing Bose-Eintein codensates of more than 10⁵ Dy …
-
Optical imaging of Rydberg atoms
… trap (MOT) and a far off resonance dipole trap (FORT). Once the system is prepared, a ladder EIT scheme with Rydberg atoms is used to map the photon field onto the ensemble. The powerful dipole interaction between Rydberg atoms allows the system to exhibit many-body quantum …
-
Dipolar Shielding and Sub-wavelength Bilayers in a Quantum Gas of Dysprosium
In our paper Can the Dipolar Interaction Suppress Dipolar Relaxation?, by using magnetic dysprosium atoms and an optical lattice we engineered the dipolar suppression of dipolar relaxation in an ultra-cold gas prepared in an excited Zeeman level. The atoms were confined to ultra-thin layers, with …
-
Control of Ligand Binding to Heme Proteins: The Role of The Distal Histidine
… in the beta chains. We postulate a charge-dipole interaction between the CO and the protonated histidine, since the recombination of the symmetric ligand, O(,2), is pH independent.
-
Spectroscopic studies of some heterocyclic hydrazones and their metal complexes
… atoms, whereas the Z-isomer association is a dipole-dipole interaction involving the aldehyde ring of different PAPHY molecules. Evidence from long range coupling shows that the uncomplexed E and Z-PAPHY molecules possess a different configuration to the complexed molecules. The chemical shift …
-
Conformational Analysis of Cyclohexandiols and Related Compounds
… series and the nature of the solvent interactions. Two types of solvent interaction have been identified, a hydrogen bonded interaction and a non-bonded dipole interaction.<br/><br/>A Computer Graphic Simulation has been used to' quantify the conformational energy differences and to …
-
Nuclear charge distribution of ¹⁸¹Ta
… way. The monopole part of the electrostatic interaction, corrected for vacuum polarization, is used in the Dirac equation. Then the electric quadrupole interaction term is diagonalized in the basis formed by the Dirac solutions and the nuclear wave functions. This prescription assumes a …
-
Unimolecular decomposition kinetics at resolved internal energies.
… involving clusters formed by the electrostatic interaction between transition metal cations and simple organic molecules has been measured at multiple internal energies. The presence of the metal lowers the energy necessary for the reactions to take place. Thus, these reactions serve as a useful …
-
On effective field theory of dark matter
… that may interact through an electromagnetic dipole interaction at dimension 5 on energy transport in the Sun. In particular, we test whether the models can provide a solution to the solar abundance problem, a theoretical discrepancy between the observations of helioseismology and the …
-
Theory of phase transitions in liquid crystals and plastic crystals
… of freedom within each smectic plane. McMillan's dipole-dipole interaction model is extended to include intermolecular repulsions. In the self-consistent field approximation there are three ordered phases: the smectic C phase in which molecules are rotationally ordered but free to translate …
-
Theoretical Circular Dichroism Of Lysozyme, Myoglobin And Collagen And Experimental Circular Dichroism Of Myoglobin And Pea Lectin
<p>The need to understand protein structure and interaction is ever-growing and this has led to scientist and investigators utilizing numerous different techniques in order to obtain substantial insights and explanation to these structures and their interactions. Circular dichroism (CD), which is …
-
Control of ligand binding to heme proteins: The role of the distal histidine
… in the beta chains. We postulate a charge-dipole interaction between the CO and the protonated histidine, since the recombination of the symmetric ligand, O2, is pH independent. The temperature independent energy shift is then used to demonstrate the importance of the final barrier even at …
-
Optical cooling using the dipole force
… theory that can be used to explain the interaction between light and matter at a very general level. I use this 'transfer matrix' formalism to explore the use of the retarded dipole-dipole interaction as a means of both enhancing the efficiency of micromirror cooling systems and …
-
A Study of Molecular Orientation at Neat Liquid-Mica Interface by Sum Frequency Generation (SFG) Spectroscopy
… on mica surface is introduced by the multiple interactions on mica surface, such as electrostatics, hydrogen bonding, van der Waals and dipole interaction between mica and liquid and liquid itself. A small change of structure and mica surface can make orientation of liquid on mica surface …
-
Studies of molecular interactions using physical techniques
… described in this thesis concern the molecular interactions between polar solute molecules and various aromatic compounds in solution. Three different physical methods were employed. Nuclear magnetic resonance (n.m.r.) spectroscopy was used to determine the nature and strength of the …
-
Phase Transitions in Dipole-Dipole Interacting Atomic Systems
… physics of phase transitions, one needs interactions between the microscopic constituents. In this thesis, the phase transitions of atomic systems with interparticle dipole-dipole interaction controlled by laser fields are studied. In the first half of the thesis, a system with externally …
-
Autodocking Studies of Oxygenated Fullerenes as Inhibitors of The HIV Protease
… functionality was likely produced due to interaction of water and the oxygenated fullerenes. In the present study, the interactions of oxygenated fullerenes (small molecules) with HIV-Protease (macromolecules) at the molecular levels were studied via blind docking using AutoDock Vina …
Page 1 of 3