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 25 for “"Ag(111)"”.
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Surface embedded green function method applied to Ag(111).
… (SEGF) method have been performed on the Ag(111) surface. Analysis of the surface energetics reveal an energy minimum in the low temperature limit at an outerlayer contraction of 0.5% which agrees well with low energy electron diffraction and ion scattering studies. The predicted Ag(111) …
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Scanning Tunneling Microscopy Studies of Cluster Diffusion in a Highly Mismatched system:Copper on Silver(111)
… cluster diffusion phenomena in both the early stages of nucleation and growth and the late stages for a highly mismatched system, Cu on Ag(111). In particular, activation energies and prefactors for cluster diffusion are measured directly by tracking cluster motion with atomic precision at …
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Scanning Tunneling Microscopy Studies of Cluster Diffusion in a Highly Mismatched System: Copper on Silver(111)
… cluster diffusion phenomena in both the early stages of nucleation and growth and the late stages for a highly mismatched system, Cu on Ag(111). In particular, activation energies and prefactors for cluster diffusion are measured directly by tracking cluster motion with atomic precision at …
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Reaction of Aqueous Polyoxometalates With Silver and Gold Surfaces
… of the Preyssler anion, NaP5W30O110 14-, with Ag(111) show that a surface phase is formed. Immersion of Au(111) in the same solutions yielded STM images that did not show evidence of a surface phase. By using a mixture of alpha-PVW11O40 4- and NaP5W30O110 14- in acidic aqueous solution, the …
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Self-assembly of amino acids on noble metal surfaces : morphological, chemical and electronic control of matter at the nanoscale
… and tyrosine amino acids on the monocrystalline Ag(111) and Cu(111) surfaces are characterized by means of scanning tunneling microscopy (STM) and spectroscopy (STS), helium atom scattering (HAS), x-ray photoelectron spectroscopy (XPS) and near-edge x-ray absorption fine structure (NEXAFS) in …
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Temperature-dependent structures of heteroepitaxial metallo-phthalocyanine (Mpc, M = Cu, Fe) thin films on silver.
… (MPcs, M = Cu, Fe) thin films were formed on Ag(111) surface by vapor deposition in ultra high vacuum (UHV). The morphology and structure of the MPcs were studied by scanning tunneling microscope (STM). Submonolayer (sub-ML) MPcs deposited at room temperature (RT) without subsequent annealing …
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Angle resolved photoemission studies of silver-bromide
… thin films of randomly oriented polycrystalline AgBr and AgBrI, and epitaxially grown AgBr on an Ag (111) single crystal.
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Supramolecular organisation, conformation and electronic properties of porphyrin molecules on metal substrates
… interactions of tetrapyrdil porphyrin (TPyP) on Ag(111) and Cu(111) were investigated. TPyP self-assembles on Ag(111) over a wide sample temperature range into large, highly-ordered 2D chiral domains. By contrast, adsorption of TPyP on the more reactive Cu(111) leads to temperature dependent …
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Interrogating the Electrochemical Interface Using Sum Frequency Generation Spectroscopy
… on the adsorption and orientation of PABA at a Ag(111) surface. The data indicates that PABA changes orientation in response to the charge on the electrode surface, orienting one way positive of the potential of zero charge (pzc) and oppositely negative of the pzc. At positive potentials a phase …
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Photoemission Studies of Thin Metallic Overlayer Systems
… photoemission spectroscopy was used to study Ag(111) monolayers on six different substrates: Ni(001), Ni(111), Cu(001), Cu(111), Au(111), and Si(111)-(7x7). The properties of surface states were also examined for several related systems: Cu(111) covered by various thicknesses of Ag, and a bare …
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Angle resolved photoemission studies of silver bromide
… thin films of randomly oriented polycrystalline AgBr and AgBri, and epitaxially grown AgBr on an Ag ( 111) single crystal. The experiments on the randomly oriented samples were concerned with obtaining the correct sample preparation methods--evaporation of AgBr or AgBri onto Ag which was …
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Nanoscale modeling of materials: post deposition morphological evolution of fcc metal surfaces
… In this scenario, the descent of adatoms from Ag islands on Ag(111) surface is examined. It shows an exchange mechanism to dominate over hopping and the process to favor the formation of (100)-microfacetted steps (A-type) over the (111)-microfacetted ones (B-type). Molecular dynamics …
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Study of molecule metal interfaces by means of the normal incidence x-ray standing wave technique
… (PTCDA) is explored on the Ag(110) surface. The molecule results more distorted and at smaller bonding distances on the more reactive Ag(110) surface, in comparison with the Ag(100), the Ag(111) and Au(111) substrates. This conclusion follows from the detailed molecular …
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High-resolution investigation of the electronic structure of organic thin films
… Struktur organischer Dünnfilme. Eine zentrale Frage dabei ist der Einfluss der Wechselwirkung zwischen den Molekülen in der kondensierten Phase und der Wechselwirkung an metall-organischen Grenzflächen auf die elektronischen Eigenschaften. Dazu wurden die experimentellen Methoden …
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Theoretical Study of Bistable Systems
… candidates for applications in information storage, spintronics and molecular electronics. Their implementation in real devices requires immobilization by deposition or interaction with a substrate. Once immobilized, the spin transition process can experience significant changes, such as shifts …
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Dynamics and manipulation of surface states
… electronic states located at the surface of the (111) faces of the noble metals Ag, Cu, andAu as well as 2D overlayer states of single atom layer Sodium films on Cu(111) have been investigated using scanning tunnelingspectroscopy (STS). All measurements were performed using a low temperature …
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Electrodeposition of Epitaxial Wide Bandgap P-Type Semiconductors and Copper Metal for Energy Conversion and Flexible Electronics
… of hole conducting CuSCN nanorods onto Au (111) surface, and lift-off to produce flexible and transparent foils. Highly ordered CuSCN could serve as an inorganic transport layer in various opto-electronic devices such as perovskite solar cells, LEDs, and transistors. An ordered and …
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Sputter deposition and characterization of metal sandwiched indium tin oxide/silicon for solar cell application
… this work, multilayer films structures of ITO/Al-Ag/ITO (IAAI) on n-type Si and ITO/Al-Cu/ITO (IACI) on p-type Si were prepared at room temperature by radio frequency (RF) and direct current (DC) magnetron sputtering technique. The microstructural, topological, morphological, optical and …
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Manipulative Scanning Tunneling Microscopy and Molecular Spintronics
… of local measurement of spectroscopic, magneto-electric, and topographic properties in real-space with sub-nanometer resolution. Still, many physical and chemical effects have yet to be completely characterized and understood. This dissertation demonstrates the novel application of …
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