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 14 of 14 for “"crystal planes"”.
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Structure-Sensitive Chemisorption: Hydrogen and Nitrogen on Single-Crystal Planes of Tungsten and Rhodium
Made available in DSpace on 2014-12-12T01:04:11Z (GMT). No. of bitstreams: 1 7500403.pdf: 6208934 bytes, checksum: f35d2088ae9511aa70ec6595ed15206e (MD5) Previous issue date: 1974
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Structure-sensitive chemisorption: hydrogen and nitrogen on single crystal planes of tungsten and rhodium
Submitted by Minhao Jiang (mjiang14@illinois.edu) on 2013-10-05T17:42:51Z No. of bitstreams: 1 1974_pollizzotti.pdf: 44823228 bytes, checksum: 25497ecd2c23f17875d86e4be58964dd (MD5)
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Electrochemical Evaluation of Surfactants Relevant to Ligand Stabilized Nanoparticles
… on different facets of the nanoparticle seed crystal. A systematic evaluation of quaternary ammonium bromide adsorption on different crystal planes of gold is provided to evaluate this popular postulate. As the low index (100) and (111) crystal planes are the most pertinent to these nanorod …
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Synthesis, characterization and catalytic testing of metal tungstates as catalysts for activation of lower alkanes
… of propane (ODP). Nanostructured, crystalline MnWO4 serves as the support that stabilizes a defect-rich MnOx surface phase. Oxygen defects can be reversibly replenished and depleted at the reaction temperature. Terminating MnOx zigzag chains on the (010) crystal planes are supposed …
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Preparation and characterisation of Pt/C and Ni/C modified electrocatalysts for use towards the oxygen reduction reaction for proton exchange membrane fuel cells
… This led to larger and more well-defined Pt crystal planes. The presence of more well-defined Pt crystal planes seemed to provide more suitable adsorption site for the dual-site adsorption of the oxygen, thus increasing the activity. Last but not least, the highest increase in catalytic …
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Getting to the Point: Bridging the Gap between Simple and Complex Catalytic Systems using Temporal Analysis of Products (TAP)
… often study simpler surfaces such as single crystals using surface science techniques. This introduces a well-known problem in the field of catalysis commonly referred to as the "pressure and materials gap." Typically, industrial catalyst research is performed under process conditions, which …
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GROWTH AND MECHANICAL DEFORMATION OF ALPHA-LACTOSE MONOCRYSTALS
This project set out to use monocrystals as the starting point in the study of the mechanical properties and deformation behaviour of alpha-lactose crystals. Chapter 2 conducts a detailed investigation into the crystallisation and growth kinetics of alpha-lactose monohydrate crystals by an agar-gel …
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New inverse hydogel opals as protein responsive sensors
… slides as the first step. The obtained colloidal crystals with a thickness of 5 μm displayed opalescent reflections because of the uniform alignment of the colloids. As a second step, the template was embedded in a matrix consisting of biocompatible, thermoresponsive hydrogels. The comonomers were …
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METAL NANOMATERIALS: SYNTHESIS, DESIGN, AND APPLICATIONS
… well-defined size, morphology, composition, and crystal structures. In this dissertation, we will demonstrate high-boiling point solvent method for synthesizing metal nanocrystals, ranging from single metal nanocrystals (e.g., iridium (Ir), ruthenium (Ru), germanium (Ge), bismuth (Bi)) to binary …
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Interlamellar modification of smectite clays
… conductivity of thin films of laponite RD in two crystal planes shows a degree of anisotropy in the a.c. conductivity. Powder X-ray diffraction and 119Sn Mossbauer spectroscopy studies have shown that attempts to intercalate some phenyltin compounds into laponite RD under ambient conditions result …
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Design of a Small-Scale System for the Growth of Artificial Sea Ice
… These are observed as vertically elongated ice crystals with a c-axis located randomly within the horizontal plane. The profile of ice thickness over time displays a √ x shape. Brine inclusions are located in vertically orientated, interconnected channels, contained within the intracrystalline …
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Physical investigations of novel materials and structures for Nano-MOSFETs
… characteristics. Current flow on different crystal planes in multi-gate devices has been used to take advantage of the anisotropy of conductivity in Si in order to match the on-currents of n- and p-type MOSFETs with the same dimensions. Improved electron mobility due to strain and excellent …
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Alternating current electroluminescent properties of zinc sulfide powders
… properties as well as studies of particle crystal structures by synchrotron and conventional X-ray powder diffraction techniques. Inductively coupled plasma mass spectrometry was utilized to investigate the concentration of co-activator atoms within the zinc sulphide crystal lattice. …
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High Intensity Ultrasound Processing of AlNi (50 wt.% Ni) Particles for Electrocatalytic Water Splitting
… of metal particles the changes in bulk (crystallite size, microstrain) and surface (composition, morphology) properties were monitored in order to unravel the fundamental aspects of acoustic cavitation and their effect on sonicated matter as well as to explain the enhancement of …