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 12 of 12 for “"crystalline surfaces"”.
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Some problems in the theory of crystalline surfaces
Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding (hding2@illinois.edu) on 2011-05-07T15:02:10Z Item is restricted indefinitely.
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Generation and relaxation of nanometer-scale roughness on the germanium(001) surface
… using scanning tunneling microscopy. The surfaces are bombarded by 240 eV xenon ions at various temperatures and exposure times. A well defined in-plane length scale is observed on the crystalline surfaces etched at $165270\sp\circ$C exhibit a regular pattern of pits. The isotropy of this …
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Decorating Crystallites with Atoms and Small Molecules: A First-Principles Investigation
… of noble gases and small probe molecules onto crystalline surfaces epitomizes physisorption. Due to its intricate nature, a delineation of the physical adsorption phenomenon is necessitated. This has led to an immense number of studies centralized on the basis of adsorption. The physical …
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Approaches for alignment and purification of single walled carbon nanotube thin films and their application in device electronics
… through detailed study of alignment a variety of crystalline surfaces of quartz. Furthermore, the study reveals that current limitations to growth density are not intrinsic to the mode of alignment suggesting the potential for dramatic improvements in growth density. Additionally, we present a …
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Force microscopy of self-assembled amphiphilic films
… microscopy is a powerful technique to study surfaces in vacuum, air or liquids because of its nanometer spatial resolution and piconewton force resolution. The work presented here uses colloidal (steric and double layer) forces to investigate the shape of surfactant micelles on an isotropic …
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A DFT study of the interaction of Ox with Pt nanorod edge sites : a model for the ORR activity on Pt nanoparticle edges
… measured the ORR activity over different single crystalline surfaces and used model nanoparticle shapes to elucidate the overall ORR activity. Theoretical studies use density functional theory (DFT) to investigate the ORR activity on various site-types present on assumed model particle shapes. …
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Structure and faceting of low-symmetry metal surfaces
… tool for determining the atomic structure of crystalline surfaces. The dual advantages of high intensity and high resolution have made this technique thrive at synchrotron radiation sources. The experiments in this thesis extend surface x-ray diffraction to metal surfaces with particularly low …
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Perichromism: a novel technique to distinguish between amorphous and crystalline material
… to be able to distinguish between amorphous and crystalline material, as an unexpected change in crystallinity can affect the character, efficacy and even safety of a medicine. There are currently many techniques that are used to distinguish between morphological forms, but these have many …
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Crystal Engineering In Antisolvent Crystallization Of Neodymium Sulfate
… caused the ethanol to be adsorbed onto the crystalline surfaces, thereby inhibiting growth from one plane to another. The final particle size distribution curves shifted showing an increase in the particle sizes as the organic-to-aqueous ratio was increased from 0.8 to 1.4. The mean particle …
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Surface glassy dynamics and single-molecule absorption of quantum dots detected by scanning tunneling microscopy
… by making STM movies of various amorphous surfaces at room temperature in a wide temporal range from 10-3 s to ~105 s. STM movies reveal that the surface of metallic glasses and amorphous materials consists of a disordered network of cooperatively rearranged regions (CRRs or clusters). On …
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Spectroelectrochemical investigation of passive layers formed on electrode surfaces
… the electrodeposited copper to result in smooth surfaces. It has face dependent protection efficiency which has been studied by various surface sensitive techniques including scanning tunneling microscopy (STM), surface enhanced Raman spectroscopy (SERS), polarization modulation infrared …