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Full-Text Articles in Physical Sciences and Mathematics
Temperature Dependent Transport Properties Of Chemical Vapor Deposition Graphene With Metal And Metal Hydride Surface Functionalization, Bochen Zhong
Theses and Dissertations
Graphene, a two-dimensional semi-conductor material containing carbon atoms tightly bonded together in a hexagonal structure, was first isolated by mechanical exfoliation in 2004. Over the past decade, it has drawn huge research interest due to its outstanding mechanical, thermal, and electrical properties. These unique properties of graphene lead to very high carrier mobility. In particular, after an annealing treatment to remove the residual impurities, the suspended graphene mobility exceeds 200,000 cm2/Vs. However, this value is highly reduced to only a few thousand cm2 /Vs in supported graphene on SiO2 or SiC substrates, due to different sources of scattering. For example, …
Rare Event Searches With Cuore Style Teo2 Bolometers, Nicholas Ivan Chott
Rare Event Searches With Cuore Style Teo2 Bolometers, Nicholas Ivan Chott
Theses and Dissertations
In this dissertation we report on the first search for solar axions from atomic transitions in the solar core. A search for the 14.4 keV axion from the ground state transition in 57Fe in the sun was also performed, via the axioelectric effect in TeO2 bolometers, in the CUORE-0 experiment. Both axion searches are performed in the scope of the DSFZ invisible axion model. An upper bound on the axion-electron coupling constant of gae ≤ 3.1 x 10-11 (95% CL) is obtained with 62.7 kg days of TeO2 exposure from the CUORICINO experiment. The CUORE-0 data results in a …
Measurement Of New Observables From The Π + Π - Electroproduction Off The Proton, Arjun Trivedi
Measurement Of New Observables From The Π + Π - Electroproduction Off The Proton, Arjun Trivedi
Theses and Dissertations
Knowledge of the Universe as constructed by human beings, in order to tackle its complexity, can be thought to be organized at varying scales at which it is observed. Implicit in such an approach is the idea of a smooth evolution of knowledge between scales and, therefore, access to how Nature constructs the visible Universe beginning from its most fundamental constituents. New and, in a sense, fundamental phenomena may typically be emergent as the scale of observation changes. The study of the Strong Interaction, which is responsible for the construction of the bulk of the visible matter in the Universe …
Measurements Of Electrostatic Double Layer Potentials With Atomic Force Microscopy, Jason Giamberardino
Measurements Of Electrostatic Double Layer Potentials With Atomic Force Microscopy, Jason Giamberardino
Theses and Dissertations
The aim of this thesis is to provide a thorough description of the development of theory and experiment pertaining to the electrostatic double layer (EDL) in aqueous electrolytic systems. The EDL is an important physical element of many systems and its behavior has been of interest to scientists for many decades. Because many areas of science and engineering move to test, build, and understand systems at smaller and smaller scales, this work focuses on nanoscopic experimental investigations of the EDL. In that vein, atomic force microscopy (AFM) will be introduced and discussed as a tool for making high spatial resolution …
Hadronic Lorentz Violation In Chiral Perturbation Theory, Rasha Kamand
Hadronic Lorentz Violation In Chiral Perturbation Theory, Rasha Kamand
Theses and Dissertations
The leading-order Lorentz-violating hadronic Lagrange densities are constructed using chiral perturbation theory. This is done for both pions and nucleons starting from a two-flavor quark-level Lagrangian that consists of dimension-four Lorentzviolation operators. The effective Lagrangians are first constructed in the absence of external fields. The formalism is then extended to include interactions with external fields. The presence of Lorentz violation modifies the transformation behavior of external fields under the chiral group SU(2)L × SU(2)R. This in turn leads to modified pion and nucleon covariant derivatives. By expanding parts of both mesonic and baryonic Lagragians in terms of physical pion and …
Exclusive Π− Electroproduction Off The Neutron In Deuterium In The Resonance Region, Ye Tian
Exclusive Π− Electroproduction Off The Neutron In Deuterium In The Resonance Region, Ye Tian
Theses and Dissertations
This dissertation focuses on extracting the exclusive γ∗n(p) → pπ-(p) reaction cross section from deuterium data. The existing γ∗n → pπ- event generator is modified to include the spectator (proton) information based on the CD-Bonn potential [28] to simulate the real data process. With this method, the exclusive quasi-free process is isolated successfully as demonstrated by the comparison of the spectator momentum distribution of the simulation with the missing momentum distribution of the data, and the kinematical final-state-interaction contribution factor RFSI is extracted directly from the data according to the ratio between the exclusive quasi-free and full cross sections. The …