Global ETD Search

331	Lifecycle Analysis of Steel Bridge Paint System Itoh, Yoshito, Tsubouchi, Saori 07 1900 (has links) The 7th German-Japanese Bridge Symposium, July 30-August 1, 2007 Osaka, JAPAN (GJBS07), full paper + extended abstract (p.142-143) Rationalized Bridge Emission Lifecycle CO2 Lifecycle Cost
332	A high performance liquid chromatograph/inductively coupled plasma atomic emission spectrometer interface for trace element speciation and for analysis of microliter samples Snable, Kimberley Russell 12 1900 (has links) No description available. Trace elements Analysis Liquid chromatography Emission spectroscopy
333	Studies with solvent introduction in inductively coupled plasma-atomic emission spectroscopy Marmolejo, Edison Becerra 12 1900 (has links) No description available. Emission spectroscopy Plasma spectroscopy Atomic spectroscopy
334	A mechanistic evaluation of the reactions of aliphatic geminal dihalides with nucleophiles and other one electron donors Deshpande, Abhay K. 05 1900 (has links) No description available. Emission spectroscopy Nucleophyllic reactions Charge exchange
335	Electrothermal vaporization sample introduction for inductively coupled plasma atomic emission and inductively coupled plasma mass spectrometry Nwogu, Vincent Ikechukwu 12 1900 (has links) No description available. Plasma spectroscopy Atomic emission spectroscopy Mass spectrometry
336	Characterization of low voltage cathodo-luminescent phosphors for field emission displays Yang, Sen 12 1900 (has links) No description available. Luminescence spectroscopy Field emission Information display systems
337	An experimental and theoretical study of new phosphors for full color field emission displays Zhang, Fu-Li 05 1900 (has links) No description available. Phosphors Industrial applications Field emission Cathodoluminescence
338	Photoexcitation Mechanisms of the Green Defect Emission from Zinc and Sulfur Doped ZnO Phosphor Powders Through Measurement and Analysis of Optical Properties and Characterization Simmons, Jay Gould January 2013 (has links) <p>The mechanism for defect related green emission from zinc (ZnO:Zn) and sulfur doped ZnO (ZnO:S) are determined through optical characterization of the green and UV emission bands. ZnO:Zn is prepared by heating ZnO in a slightly reducing atmosphere for 1 hour and sulfur doped ZnO is similarly obtained with a small amount of sulfur added. Photoluminescence (PL), photoluminescence excitation spectra (PLE), and quantum efficiency measurements are analyzed to determine the mechanism of the green defect emission. Low temperature PL and PLE measurements are used to assign activation energies to the emission processes and connect them with donor bound excitons in ZnO. It was determined that both ZnO:Zn and ZnO:S have a similar green emission mechanism. This common mechanism involves the formation of donor bound excitons <italic>I<sub>3a</sub></italic> and <italic>I<sub>9</sub></italic>, which were determined to be the mediators between photoexcitation of excitons and the transfer of energy to the defect responsible for green emission. The most efficient excitation processes for both the green and band edge emissions at low temperatures is through direct excitation of the neutral donor bound exciton <italic>I<sub>9</sub></italic> or by ionizing the neutral donor bound exciton <italic>I<sub>3a</sub></italic>. The ionization of <italic>I<sub>3a</sub></italic> eliminates this exciton localization site and simultaneously creates a bound exciton at <italic>I<sub>9</sub></italic>. The <italic>I<sub>9</sub></italic> bound exciton can then either transfer energy to the defect responsible for the green emission or contribute to the free exciton population through a phonon assisted transition. At room temperature a resonant absorption peak associated with <italic>I<sub>9</sub></italic> is still present in the absorption band for ZnO:Zn suggesting partial localization at <italic>I<sub>3a</sub></italic> and <italic>I<sub>9</sub></italic> of free excitons with low kinetic energy (excitations below the band gap) continues to be the intermediate between excitons and the energy transfer to the green emitting defect. </p><p>In ZnO:S, the addition of sulfur creates ZnS domains within the lattice leading to a type II band alignment at the interface of ZnO and ZnS domains. This band alignment at the interface increases the density of free electrons in ZnO, which may then encounter an ionized <italic>I<sub>3a</sub></italic> site converting it to its neutral form. Increasing the density of free electrons, a result of the type II band alignment, increases the chances of returning an ionized <italic>I<sub>3a</sub></italic> to its neutral form and thus increases the green emission. These results can lead to informed optimization of ZnO:S as a potential white light emitting phosphor.</p> / Dissertation Chemistry Defect Emission Excitons Photoexcitation Photoluminescence ZnO
339	Correlation of nebulizer performance with basic aerosol properties, response and detection limits in ICP-AES Syed, Sarah Sabeena 12 1900 (has links) No description available. Atomic emission spectroscopy Aerosols Atomic spectroscopy
340	Quantifying Methane Emission from Surface Sources using the Backward Lagrangian Stochastic Method Mahzabin, Tarana Unknown Date No description available. Methane Emission Backward Lagrangian Stochastic Method WindTrax

Search results