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 9 of 9 for “"hydrogen bromide"”.
-
Reactive ion etching of indium phosphide-based heterostructures and field-effect transistors using hydrogen bromide plasma
A new highly selective reactive ion etching process based on HBr plasma for the removal of InGaAs over InAlAs has been developed and the results are presented. The etch selectivity at a self-bias voltage of $-$100 V is over 160, which is the highest that has been reported for this material system …
-
A study of the mechanism of the thermal decomposition of 1-bromo-2-(1-naphthyl)naphthyl-carbinol and related diarylcarbinols
… found to proceed slowly with the liberation of hydrogen bromide gas. Free radical initiators and hydrogen bromide gas were found to accelerate the decomposition of 58 at 240°. A reasonable mechanism has been postulated for the decomposition of 58 at 240°. The cleavage of ether 58 in the presence …
-
A study of methods of preparation of phthalaldehyde
… compound.</p><p>The first method, low-pressure hydrogenation of dibutylphthalate over Raney nickel catalyst has supported the contention that the principal product of the hydrogenation of aromatic esters over Raney nickel arises by hydrogenation of the benzene nucleus. Evidence indicates that …
-
Synthesis and Surface Characterization of Silica-Polypeptide Composite Particles
… particles were removed by reaction with hydrogen bromide yielding silica-PLGA (poly(L-glutamic acid)) particles. The hydrodynamic radii and zeta potential were studied as function of pH. The silica-PLGA composite particles appear extended and negatively charged at high pH and compact and …
-
The Redox Reaction of Anhydrous Hbr For Hydrogen Production and Bromine Hydrogen Flow Battery
… prototypes (vanadium, sodium polysulfide bromide, zinc-bromide, zinc-nickel, and lead acid etc) have been developed. These devices essentially store energy in the electrolyte externally and utilize redox electrode reactions for energy conversion. Therefore, highly reversible electrode …
-
Multiphase star-like copolymers containing lignin: synthesis, properties and applications
… oligomers were synthesized by degradation with hydrogen bromide of a fully substituted, high molecular weight cellulose propionate molecule. Evidence of strict monofunctionality was demonstrated by H-NMR spectroscopy. Thermal analysis results indicated that the oligomers were semi-crystalline …
-
The synthesis of some new aromatic polycyclic hydrocarbons
… appropriate acid chlorides. The alumina cyclodehydrogenation procedure was confirmed to be the, only method of synthesis that yields 12-(1-naphthyl)-benz[a]anthracene from its precursor ketone. The yield of 12-(2-naphthyl)benz[a]anthracene was increased from 61% to 83% when anhydrous hydrogen …
-
Micro-photovoltaic materials and systems for solar energy harvesting and light management
… by reaction time subsequent to addition of hydrogen bromide (HBr) gas and is correlated with the presence of chromophoric endgroups, as dictated by the molecular weight. The polyhydrofuran exhibits blue emission with a quantum yield of ca. 14%, and the fluorescence is largely quenched with …