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.
Results
Showing 1 to 13 of 13 for “"Arrhenius Parameters"”.
-
Grain Nucleation and Growth on Amorphous Silicon
… Molecular dynamics simulations yielded diffusion Arrhenius parameters close to published experimental values. Diffusion occurs by short migration of atoms following the breaking of strained four-membered rings, in contrast to the long-lived adatoms that mediate diffusion on a crystalline surface. …
-
The Reaction Kinetics of Neutral Free Radicals and Radical Ions Studied by Laser Flash Photolysis
… this concern, absolute rate constants and Arrhenius parameters for hydrogen abstraction by t-butoxyl radical were measured for a broad class of substrates including amines, hydrocarbons, and alcohols using laser flash photolysis. Initially, no obvious reactivity relationship between rate …
-
Fourier-transformed infrared absorption spectroscopy and kinetics studies of Gas phase small molecules
… by t-butoxy radical. The rate coefficients and Arrhenius parameters for selected reactions have been determined for several substrates. The fourth is the reactions of O(3P) and Cl(2P3/2) atoms with (CF3)2CHOH and CF3CH2OH. The rate coefficients at 295A?2K for have been determined and stable …
-
Structure and decomposition of diol inclusion compounds
… by means of isothermal thermogravimetry. The Arrhenius parameters determined showed a compensation effect between the activation energies and pre-exponential factors. Competition experiments were performed to determine the selectivity of the host for the four guest substances.
-
Kinetics of Buffer-Layer-Assisted Nanostructure Growth
… diffusion and buffer depletion, from which the Arrhenius parameters for Ag, Au, Cu, Pd, Co, and Ni nanoparticle slip-diffusion are determined. Significantly, the Arrhenius parameters follow a Meyer-Neldel-type compensation rule which bears the signature of the phononic excitations present in …
-
Diffusional Phenomena in Microelectronics Processing
… microscopy has been utilized to quantify the Arrhenius parameters for diffusion of germanium on silicon at high temperatures. Molecular dynamics simulations provide insight on a picosecond timescale into the complex nature of the mass transfer diffusive process. Two methods of nonthermally …
-
Measurement of ignition delay time of jet fuels in shock tube for the development of the chemical kinetic mechanism
… (CMA-ES) is then employed to optimize selected Arrhenius parameters of the 16 lumped HyChem reactions using a multi-objective function that combines ignition-delay RMSE and L1/L2-type regularization, with tight parameter bounds to preserve physical plausibility. The optimized mechanisms correct …
-
Structure and reactivity of selected inclusion compounds
… the crystal structures of these compounds. The Arrhenius parameters for the desolvation of all the inclusion compounds under investigation were found to show the compensation effect. The kinetics of solvation of trans-9, 1 0-dihydroxy-9, 1 0-diphenyl-9, 1 0-dihydroanthraceneand 1, 3-dioxolane …
-
Investigation into the Hydrothermal Treatment of Sugarcane Bagasse under Near- and Supercritical Conditions
… a comprehensive evaluation of multiple process parameters and various additives and their effects on a single product phase. This research examined the influence of temperature, residence time, biomass concentration, and particle size on volatiles production from the hydrothermal conversion of …
-
Infrared and x-ray spectroscopic studies of the copper(II) oxide mediated reactions of chlorinated aromatic precursors to PCDD/F
… from 275-375 °C. The rate of reduction and Arrhenius parameters are given for each system, as well as copper speciation throughout the reaction. The results obtained support the contention the redox reactions of copper species promote the formation of phenoxyl radicals. Additionally, a …
-
Single Walled Carbon Nanohorns as Photothermal Absorbers, and Incorporation of Spatial Digital Image Analysis into Cancer Diagnostics and Therapy
… cellular microenvironment and heating method on Arrhenius parameters. Results: The inclusion of SWNHs dramatically increased the temperatures reached in each experiment. Digital image analysis methods were shown to quantify spatial viability with a high degree of accuracy and precision in 2D and …
-
Amidate complexes of the group 4 metals : sythesis, reactivity, and hydroamination catalysis
… this proposed solution structure. Eyring and Arrhenius parameters, as well as isolation of a 7-coordinate model imido complex, support a seven-coordinate transition state for the rate-determining metallacycle protonolysis reaction. In contrast, secondary aminoalkene hydroamination catalysis …
-
Determination of Thermal Dose Model Parameters Using Magnetic Resonance Imaging
… during therapy. The underlying thermal dose parameters are derived from laboratory experiments that do not necessarily reflect the surrogate imaging endpoints used for treatment verification. Thus, there is interest and opportunity in deriving model parameters from clinical procedures that …