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.
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Showing 1 to 20 of 36 for “"physisorbed"”.
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Self-Assembly in Physisorbed Monolayers via Directional Intermolecular Interactions
… to influence the structure of self-assembled physisorbed organic monolayers is considered. These layers exhibit only weak, non-directional interactions with the substrate, and so their structure is driven by the adsorbate-adsorbate interactions. In the initial phase of work, scanning …
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Stochastic Theory of Desorption Reactions (Brownian Motion)
… is used to study the escape of a molecule from a physisorbed state into a dense fluid.
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Structural study of electrochemically induced adsorption and diffusion of metal surfaces
… (STM) was used to characterize adsorbates physisorbed onto conductive surfaces. The STM is ideal for this because it is capable of obtaining real space images of local electronic and topographic features with atomic resolution. It also has the ability to perform in many different …
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Structure and dynamics of adsorbed polymer
… composition and structure of macromolecules physisorbed from solution to a single solid surface. Measurements of the surface excess, segmental orientation, bound fraction, segment-surface interaction enthalpy, and adsorption-desorption kinetics were made using Fourier transform infrared …
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The Design of Antimicrobial Detachable Thin Films for the Study of Hepatic Infections
… LL-37 to study hepatic infections. LL-37 was physisorbed and covalently linked to the surface of the PEMs. Escherichia coli DH10B were cultured in the presence of LL-37modified PEMs in bacterial adhesion and contact killing models. Physisorbed LL-37 PEMs prevented bacterial adhesion and could …
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Multinuclear Nuclear Magnetic Resonance Studies of Model Inorganic Systems (Nmr)
… obtained suggest the presence of very mobile physisorbed molybdenum hexacarbonyl. The two subcarbonyls molybdenum penta-carbonyl and tri-carbonyl are shown to be the most consistent with the data as products after thermal activation.
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Implications of Diversity: A Study of the Evolution of the Adsorption States of Macromolecules at Surfaces
… and development of adsorption states within the physisorbed layer is noted in both chemically homogeneous and heterogeneous layers and is inferred from measurements of surface excess, bound fraction, segmental orientation, and adsorption-desorption kinetics made using Fourier transform infrared …
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Nuclear Forward-Scattering of Synchrotron Radiation From Krypton: First Observation and Application to the Study of Lattice Dynamics in Near-Monolayer Krypton-on-Graphite
… containing Kr including bulk crystals and physisorbed Kr-on-exfoliated graphite. Previous nuclear-resonant scattering experiments using synchrotron radiation have consisted of demonstration experiments. Nuclear forward-scattering from Kr has been applied to study the lattice dynamics of …
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Density functional theory investigations of graphene-based heterostructures
… configurational minima, one chemisorbed and one physisorbed, whose properties are not altered when graphene is placed atop hBN. However, a switch from chemisorbed to physisorbed hBN on Ni can occur due to the processing conditions during graphene growth; this switch is solely responsible for …
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Physical adsorption of argon, krypton and nitrogen on iron and pyrex at very low pressures
… heats also indicated that all three gases were physisorbed on the Pyrex and iron. Work function measurements were taken simultaneously with the adsorption isotherm measurements. The results were marginal but confirmed that nitrogen was physisorbed on iron. Water contact angles on Pyrex and iron …
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Low-temperature molecular beam epitaxy of gallium arsenide Antisite incorporation and Rheed oscillations: A theoretical study
… proposed based on the presence and dynamics of a physisorbed arsenic (PA) riding the growth surface which dictates the incorporation and concentration of antisites and the RHEED oscillations (ROs) behavior. The dependence of antisite concentrations on growth parameters can be explained based on …
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Dissipation and Leachability of Formulated Chlorpyrifos and Atrazine in Organically-amended Soils
… of radioactivity (62%) was associated with physisorbed atrazine represented by the ethylacetate extract I from unamended treatments while only 28% of initial applied radioactivity was recovered in the corresponding amended treatments. Based on the sum of radioactivity in humic and fulvic …
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Halo-fosfatų 31P, 1H ir 35Cl kietojo kūno BMR tyrimas /
… NMR spectra, it was found that structured and physisorbed/chemisorbed H2O and hydrogen phosphate were present in the samples. 35Cl MAS NMR and 35Cl wideline NMR spectra show us the formation of crystal and amorphic (glass) materials in calcium chlorapatite samples. Meanwhile, 35Cl wideline NMR …
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Coordination Cages: Beyond The Solution State
… coordination cages in the solid-supported physisorbed and neat liquid states and the host-guest chemistry of the resulting materials. This thesis is divided into three main sections are these are outlined below: Chapter 1 presents a brief introduction to the history and development of …
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Theoretical study of MBE growth of indium gallium arsenide semiconductor compound on gallium arsenide substrate
… process has two components, one arising from the physisorbed layer of In and the other from the surface of the crystal. The activation energy for these processes for an isolated adatom are 0.18 eV and 2.6 eV, respectively. These observations are explained based on the interplay of competing …
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Molecular manipulation with the scanning tunnelling microscope
… dissociation process proceeds via a precursor physisorbed state. Electron injection from STM was used to induce atomic manipulation of PCB on Si(111)- 7×7 surface. Four types of manipulation outcomes were observed; desorption, double dark feature, single dark feature and the generation of a …
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Anharmonic Acoustic Technique for Detection of Surface-bound Particles
… resonator from the transduced electrical signal. Physisorbed and specific interactions both in air and liquid medium are studied using thickness shear mode quartz crystal resonators and streptavidin-coated polystyrene microbeads (SCPM) of various sizes. It is found that the modification in the …
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Electronic structure, defect formation and passivation of 2D materials
… of the electrode. This can be done by using a physisorbed contact layer like FeCl3, AuCl3, and SbF5 etc. to dope the graphene without making the graphene pucker so these dopants do not degrade the graphene’s carrier mobility. Then we consider the defect formation of 2D HfS2 and SnS2 which are …
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