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.
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Showing 1 to 17 of 17 for “"attractive interaction"”.
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CH-[pi] interactions play a central role in protein recognition of carbohydrates/
Carbohydrate-protein interactions play a central role in biology, but knowledge of the forces underlying them is limited. Carbohydrates are generally hydrophilic and therefore present unique challenges in their recognition. One underappreciated force involved in carbohydrate-protein interactions is …
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Studies of kinetic glass transition in a triblock copolymer micellar system
… originating from clustering effect, called the "attractive glass", as a result of the attractive interaction. This is in addition to the well-known glass-forming mechanism due to the cage effect in the hard sphere system, called the repulsive glass.
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Model for an exciton mechanism of superconductivity in planar geometry
… the exciton mechanism) on the electron-electron interaction is estimated by two separate means and is found to lead to an attractive interaction for favorable choices of semiconductor and metal materials. A brief look at attempts to derive these results in terms of the microscopic dielectric …
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Numerical simulations of dense granular systems with and without cohesive effects
… fluctuations is not relevant. However, the interaction between the particles may be very complex, involving inelasticity and friction, in addition to repulsive and possibly attractive interaction forces. These interactions that may be history dependent, make the systems that consist of a …
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Low Energy Excitations of 1D Fermi Gases
… our previous investigations in the repulsive interactions, we investigate the attractive interaction side, where the attraction of the fermions causes bound states to form. The binding energy of these bound states causes a gap in the spin excitation, a hallmark of a new class of model: …
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A Multifaceted Phenomenon of Hydrophobic Effects: Insights Learned from Nucleation Algorithm Based Computer Simulation Approach
… Our simulation results demonstrate that the weak attractive interaction between water molecules and walls allows water molecules to pack more efficiently for the smallest wall separation of 3 Å considered here comparing with the hard wall case where there is no interaction between water molecules …
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The effects of particle shape, size, and interaction on colloidal glasses and gels
… varied from 10^-3M to 1M resulting in particle interaction potentials that range from repulsive to attractive. The effect of anisotropic shape is found to increase the glass transition volume fraction (phi_g) in good agreement with activated naïve Mode Coupling Theory (nMCT) calculations. …
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Structure formation and fractionation in systems of colloidal rods
… Carlo simulations in the NPT ensemble. Repulsive interactions can successfully be mimicked by the hard rod model, which has been studied extensively in the past. In many cases, attractive interactions like van der Waals or depletion forces cannot be neglected, however. In the first part of this …
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The role of repulsive interaction in molecular self-assembly on insulating surfaces
… of surface science research, the behaviour and interaction of molecules on a surface and the resulting system’s properties are investigated. The properties depend, among other things, on the structure formed by the adsorbed molecules. The molecules can self-assemble, driven by attractive and …
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Anisotropic nonlinear PDE models and dynamical systems in biology
… particle models with anisotropic repulsive-attractive interaction forces and their continuum counterpart. These models are motivated by the simulation of fingerprint databases, which are required in forensic science and biometric applications. In existing interacting particle models, the …
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STUDY OF COLLOIDAL INTERACTIONS MEDIATED BY BIOMOLECULAR RECOGNITION AND BY ELECTROKINETIC FLOWS.
… PhD thesis focuses on new types of interparticle interactions in colloidal dispersions. In particular, it considers interactions mediated by two different phenomena - biomolecular recognition and electrokinetic flows. The general purpose of this investigation is twofold: while we investigate new …
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Computer Simulation of Biological Systems
… The work is focused on: (a) the study of the interaction between a segment of a DNA molecule and a functionalized surface; (b) the dynamical modelling of protein tau, an intrinsically disordered protein. We briefly describe here the two problems; for their detailed introduction we refer …
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Properties of rotating ultracold bosonic quantum gases
… of the system for both repulsive and attractive interaction strengths. To study the response of the system to variations in the rotation rate, we introduce a “disorder” potential, breaking the rotational symmetry. We demonstrate the breakdown of adiabaticity as the rotation rate is …
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New Approaches to the Synthesis of Porous and/or High Surface Area Transition Metal Oxides
… of charged templates where strong Coulomb interactions favour the supramolecular arrangements/assembly were studied. The problems related with the dynamics of polymeric nanostructures for the synthesis of predesigned mesostructures could be avoided by crosslinking micelles, strictly …
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Structural Analysis of Cylindrical Particles by Small Angle X-ray Scattering
… and 13.4 nm, respectively. The inter-particle interactions of Laponite particles were investigated by the structure factor S(q), from which the effective diameter of interparticle interactions deff was determined for the first time. The strong electrostatic Coulomb repulsion between charged …
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Investigating non-equilibrium phenomena in active matter systems
… based on effective friction induced by a binding interaction is general and scales with the affinity of the interaction being investigated (i.e. protein-lipid, metal ion, electrostatic, antigen-antibody, or hydrophobic interactions). In Part II, I will build up in complexity and develop an …
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Adding ammonia during Fischer-Tropsch Synthesis: Pathways to the formation of N-containing compounds
… at higher temperatures. Both repulsive and attractive interaction energies were calculated for the various coadsorbed states (CO + NHₓ on Fe(100)) and similarly some configurations resulted in an energetically favored or unfavored heat of mixing. The activation barrier for CO dissociation …