Now showing items 1-10 of 151
A theoretical study of the effects of an external electric field on adsorbate-surface systems
We have used the density functional ab initio method to conduct investigations on the effects of an applied electric field on the chemisorption bonds of adsorbate-surface systems, and on the reactivity of a gas phase ...
Trapping and evaporation of strontium-87 and strontium-88 mixtures
This thesis describes trapping and evaporative cooling of ultracold 87Sr and 88Sr mixtures in an optical dipole trap to produce the first Bose-Einstein condensate (BEC) of 88Sr. Furthermore, this work presents thermalization ...
Spin-polarized metastable de-excitation spectroscopy: A new probe of alkali chemisorption on surfaces
Metastable (Atom) De-excitation Spectroscopy (MDS) provides a powerful technique with which to investigate surface electronic structure with extreme surface specificity. In this technique a thermal energy beam of noble-gas ...
The cooling of a surface, due to photoelectric emission
The cooling of a surface when thermionic electrons are emitted has been measured by Richardson and others. The results obtained for tungsten and other metals are consistent with recent determinations of the work functions ...
Adiabatic thermal changes in dielectrics at low temperatures
The problem set up as the objective of the present thesis is the detection and measurement of adiabatic thermal changes in barium titanate ceramic at low temperatures. Concurrent with this is the problem of devising ...
Magnetic properties of chrome potassium alum below 1.0° Kelvin
Abstract Not Available.
Towards the quantum limit: A Single Electron Transistor analysis
The Single Electron Transistor (SET), especially its variation the radio frequency single electron transistor (RF-SET), is a fast and ultra-sensitive electrometer working in the vicinity of the quantum limit. In this thesis, ...
Wet-spinning of neat single-walled carbon nanotube fiber from 100+% sulfuric acid
Single-Walled Carbon Nanotubes (SWNT) have been found to have excellent solubility in super acids such as 100+% H2SO4, and chlorsulfonic acid. The solutions display liquid crystalline behavior at high concentrations in ...
Andreev reflection and spin injection intod-wave,p-wave, ands-wave superconductors
The effect of spin injection into d-wave, p-wave, and s-wave superconductors is studied here. A theory is developed which treats the interplay between the bulk and boundary spin transport, as well as the interplay between ...
Ultrafast optical spectroscopy of single-walled carbon nanotubes
Wavelength-dependent, near-infrared pump-probe study of micelle-suspended Single-Walled Carbon Nanotubes (SWCNTs) whose linear absorption spectra show chirality-assigned peaks is presented. Two distinct relaxation regimes ...