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 11 of 11 for “"site blocking"”.
-
STUDY OF THE SELECTIVE GROWTH OF THIN FILMS: EFFECTS OF A THIRD SPECIES IN ATOMIC LAYER DEPOSITION
… research has been conducted using solution-phase site-blocking layers and/or photolithography for patterning. In this thesis, a process that is more compatible with existing manufacturing lines in industry is studied. In an ALD cycle, we introduced a third species called a co-adsorbate which is …
-
Impact of Porous Media Grain Size on the Transport of Multiwalled Carbon Nanotubes
… that a dual deposition model coupled with site blocking greatly improves model fits compared to traditional colloid filtration theory.
-
The Oxidation of Methanol on Cr₂O₃ (101̅2) Single Crystal Surfaces
… is attributed to the presence of cation/anion site-pairs. An array of products including CH₄, CH₂O, CO, CO₂, and H₂ are produced above 550 K on the nearly-stoichiometric surface. Monolayer coverage of methanol yields a 58% conversion to products. Of these products, selectivity to CO is the …
-
Halocarbon Reactions on the Chromium (III) Oxide (101̲2) Surface
… terminates the surface chemistry due to site blocking of the cations. Reactivity is directly related to the chlorine content of the molecules investigated. Only CFCl₂CH₂Cl was reactive on a chromyl-terminated surface.
-
Model Chromia Surface Chemistry: C<sub>2</sub> Alkyl Fragment Reactions and Probe Molecule Interactions
… of surface Cr reaction centers by simple site blocking. The interaction of water with nearly-stoichiometric α-Cr₂O₃ (001) and (102) surfaces is structure sensitive. Water is sensitive to the difference in coordination number of Cr surface cations between the two surfaces, and on the …
-
Photoluminescene and SIMS investigation on the dynamics of native defects in zinc oxide
… Zni stagnate the Oi injection but not by simple site-blocking mechanism. Room temperature photoluminescence illustrate a new possible defect network that involve the non-excluded H2 in zinc oxide. Preliminary results show a possibility that the residual hydrogen in ZnO can play important roles in …
-
Design, construction and commissioning of a packed bed reactor system for methane to methanol conversion
… over such a catalyst might be possible through site blocking action with in presence of steam and/or high oxygen partial pressures as well as the presence of a promoter. Thus, a packed bed reactor system capable of safely operating under high pressures (< 50 bar) is designed and constructed to …
-
Nociception and the Experience of Pain Signaling Due to Nerve Damage
… a preliminary understanding in pain signal blocking. Three distinct genes have found to be associated with perceiving pain, which include Transient Receptor Potential Ankyrin 1 (TRPA1), Transient Receptor Potential Melestatin 8 (TRPM8), and Cannabinoid Receptor 1 (CNR1). We hypothesize …
-
Catalyst Layer Design in Polymer Membrane Fuel Cells
… this increase in catalyst allows for more active sites it causes challenges in transport performance by elongating pore channels. From this the second objective of this work was to examine the chemistry and morphology of both the non-PGM catalysts and sprayed catalyst layers and their effects on …
-
Promotion of Heterogeneous Acid and Base Catalysts for Biomass Upgrading
… solid materials contain acidic or basic active sites that can catalyze a variety of organic transformations. In this work, we studied how acid-catalyzed reaction rates can be enhanced by modifying reaction and catalyst conditions beyond the active site itself. We have also leveraged the …
-
Selective oxidation of methane in a trickle bed reactor over a platinum-based catalyst
The direct on-site conversion of methane to methanol could provide a more cost-effective and less energy-intensive utilization of natural gas compared to the industrial two-step syngas based route. Despite the numerous approaches investigated for direct methane to methanol (DMTM) conversion in the …