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Showing 1 to 15 of 15 for “"Disordered Solids"”.
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Defects and Rearrangements in Disordered Solids
… thesis, I will investigate the properties of disordered materials under strain. Disordered materials encompass a large variety of materials, including glasses, polymers, granular matter, dense colloids, and gels. There is currently no constitutive equation based on microscopic observables that …
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Non-affine lattice dynamics of disordered solids
… of the mechanical and vibrational properties of disordered and amorphous solids. Resorting to the theoretical framework of non-affine lattice dynamics the attention is focused on the analysis of disordered networks and lattices which serve as tractable model systems for real materials. Firstly, …
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Vibrational and mechanical properties of disordered solids
… it possible to calculate the elastic moduli of disordered systems directly from their microscopic structure and potential energy landscape at zero temperature. In this thesis different types of disordered systems were studied using this framework. By comparing the shear modulus and vibrational …
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High Pressure Nmr Studies of Disordered Solids and Polymers
Made available in DSpace on 2014-12-10T23:02:06Z (GMT). No. of bitstreams: 1 7511581.pdf: 5231272 bytes, checksum: ef8442b5abc4d4fd7a5ddef903471baa (MD5) Previous issue date: 1974
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Nmr Studies of Liquids and Disordered Solids at High Pressure
Made available in DSpace on 2014-12-13T20:10:31Z (GMT). No. of bitstreams: 1 7913463.pdf: 5559925 bytes, checksum: 1573a58a7cedd1c0993a446002f40194 (MD5) Previous issue date: 1978
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Unearthing the Anticrystal: Criticality in the Linear Response of Disordered Solids
The fact that a disordered material is not constrained in its properties in the same way as a crystalline one presents significant and yet largely untapped potential for novel material design. However, unlike their crystalline counterparts, disordered solids are not well understood. Though …
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Electron Spin Echo and Millimeter Wave Epr Studies of Disordered Solids
Electron spin echo (ESE) spectroscopy has been used in the first section of this study to measure weak nitrogen hyperfine coupling in a series of pyridine derivatives loosely bound to bis(benzoylacetonato)copper (Cu(benzac)$\sb2$) in solution. The ESE technique has also been employed to study weak, …
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X-band ENDOR and S-band ESEEM of paramagnetic disordered solids
… electric quadrupole couplings in paramagnetic disordered solids. In the X-band ENDOR investigation, radicals generated from perylene adsorbed on catalytically active alumina and silica-alumina surfaces were studied. Complex ENDOR spectra were obtained. The magnitudes of the principal elements …
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S-band electron spin echo and multifrequency EPR investigations of disordered solids
… weak electron-nuclear couplings in paramagnetic solids. Frequencies that correspond to nuclear transitions are manifested in the electron spin echo envelope modulation (ESEEM) patterns recorded from a sample. Information regarding the distance between the unpaired electron spin and neighboring …
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Computational Methods for Studying Phonon Dynamics
In solids and molecules, atoms vibrate about their respective equilibrium positions at finite temperature. This thermal motion can be understood as a superposition of the structure’s normal modes, often termed phonons, which are collective motions of atoms vibrating at certain frequencies. These …
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Universal sound attenuation in amorphous solids at low-temperatures
"Disordered solids are known to exhibit quantitative universalities at low temperatures, the most striking of which is the ultrasonic attenuation coefficient 1/Q(ω). The established theory of tunneling two state systems (TTLS) in its original form (i.e. without extra fitting functions and …
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Structure of and Phase Transformations in Bulk Amorphous (GaSb)i_x(Ge2)I
… contributes to the understanding of physics of disordered solids. The importance of structural studies can hardly be overestimated. Structure determines the major properties of materials: electrical, elastical, thermo-dynamical etc. However, until now the subject of structural studies of …
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N-type doping of organic thin films using a novel class of dopants
… study are interpreted in terms of transport in disordered solids. Detailed mass spectroscopic investigation are carried out to investigate the sublimation behaviour of the organic salt pyronin B chloride. We conclude that mainly HCl and the leuco base of pyronin B is present in the gas phase. …
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High Deviatoric Strain Engineering/
… motion to diffusion. The result suggests that in disordered solids, deviatoric strain alone can drive particle diffusion even at zero vibrational temperature.
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Microplasticity in metallic glasses
… breaks a long-known universal aging behavior of disordered solids. The experiments reveal how microplasticity in MGs leads to intermittent structural dynamics instead of the monotonous aging response seen under zero-stress conditions. Combining these experiments with molecular dynamics …