Browsing by Discipline
Now showing items 41-60 of 64
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Optically-excited excitonic states in semiconductor superlattices
(2002)An efficient method for calculation of the exciton states in type-I superlattices is developed and demonstrated. The model, based on the work of Dignam & Sipe [Phys. Rev. B 43,4097 (1991)], includes bound and quasi-continuous ... -
Ordered supramolecular oligothiophene structures on passivated silicon surfaces
(2014)The adsorption of brominated tetrathienoanthracene molecules (TBTTA) onto the Si(111) 3-Ag surface has been studied. The molecules were absorbed at room temperature and annealed up to 400C. One monolayer of Ag was used to ... -
Photoluminescence and raman characterization of PLEE and MBE grown semiconductor epilayers
(1994)Photoluminescence and Raman investigations of selected alloy semiconductor epilayers are reported. Correlations relating optical spectra and a number of intrinsic and extrinsic properties of the materials studied are ... -
Photon number density operator
(1995)A new operator is introduced to represent the density of photons in configuration space. It has some features in common with operators previously introduced by Mandel and Cook but has better transformation properties. The ... -
Pinning of magnetic vortices subject to multi-well potential in the Ginzburg-Landau theory of superconductivity
(2012-11-10)I will study the existence of multi-vortex solutions of the Ginzburg-Landau equations with an external potential on R2. These equations model the equilibrium states of superconductors: the external potential, W, represents ... -
Plasmonic nanostructure on a tapered fiber for chemical detection
(2017)A simple, cost effective technique to manufacture plasmonic nanostructures as a Surface Enhanced Raman Spectroscopy (SERS) substrate was investigated. The plasmonic structure of gold nanorods was developed on the surface ... -
Positron/electron annihilation via the two-photon pathway
(2012-11-10)When a positron/electron pair annihilate via the two-photon pathway, the emitted photons are momentum correlated. This correlation ensures that they move along a straight line path in opposite directions. An experiment ... -
Pressure dependent extrinsic effects in InSb
(1980)Electrical transport properties of n and p-type InSb in the temperature range 6.2-300K have been studied under pressures up to 15 kbar using Hall measurements. The donor gap in n-InSb is found to increase linearly with ... -
Proton NMR spectral study of UV treated live Escherichia coli Bacteria / by Michael Sorokopud.
(2010)The lethal effects of ultraviolet radiation on microorganisms have been known and utilized for many years. In sufficiently high photon fluences, light and in particular, UV light, is an effective and subtle means of killing ... -
S U (3) Squeezing: quantum and semiclassical evolutions
(2013-02-03)In this thesis we describe a squeezing for SU(3) systems and compare squeezing in the phase space in the semiclassical approximation with squeezing obtained by the full quantum mechanical calculation. We show that the ... -
Self-assembly of dithiol monolayers on Au(III)
(2001)This thesis compares the self-assembly of octanethiol, a representative n-alkanethiol, with dithiothreitol (DTT) on Au (lll). Octanethiol is on eight carbon n-alkanethiol while DTT is a four carbon Q ,(i) dithiol ... -
Self-consistent driven Bloch oscillations in excitonic Wannier-Stark ladder
(2001)In this thesis, we present a theoretical model of Self-consistent driven Bloch oscillations (SCD BO) of different types of charge carriers in biased semiconductor superlattices photoexcited via ultra-short near-bandgap ... -
Simple route to new palladium-carbonyl-bis(diphenylphosphino)methane complexes
The method of synthesizing metal-carbonyl-dppm complexes [dppm = bis(diphenylphosphino)methane) devised by Holah and Hughes has been extended to include palladium. Specifically, reductions of palladium salts by NaBH4 ... -
Simulated accelerated evolution by modeling the rapid fixation of bacteria along an antibiotic gradient
(2020)The work in this thesis makes connections between statistical mechanics and genotype frequencies in population sizes, and how mutation of the bacteria E. coli helps to increase its resistance to the antibiotic ciprofloxacin. ... -
Static dielectric properties of an ensemble of restricted one-dimensional oscillators
(1984)Deviations from constancy of the Clausius-Mossotti function, C[subscript M], with changes in density and temperature are considered on the basis of a one-dimensional oscillator model of the atom in which the valence ... -
Study of a brominated triphenylamine derivative on metal and semiconducting surfaces
(2020)Room-temperature STM experiments were conducted for tribromotrioxoazatriangulene, (TBTANGO), on three surfaces: Si(111)-√3x√3-R30o-B, Ag(111), and Au(111) on mica. We found for the silicon samples there was a trade-off ... -
The effects of propagational factors on quantum wires in close parallel proximity
(1993)Recent advances in semiconductor technology have made it possible to produce devices of such small size that electronic conduction through these devices is dominated by the quantum properties of the electron. The fact ... -
Theoretical study of the folding kinetics of the ultra-fast folding Trp-cage protein
(2006)Native-centric coarse-gained models, termed Ca Go models, have been widely used for computational simulation of small protein to study their folding kinetics and thermodynamics. The limitations of these models come from ... -
Theory and Production of Hyperpolarized Xenon Gas
(2015-12-03)Conventional magnetic resonance imaging (MRI) modality is based on the magnetization that is formed by the influence of a strong polarizing magnetic field on the spin of protons, typically those of water molecules within ...