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Showing 1 to 12 of 12 for “"Scanning tunnelling microscopy"”.
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Scanning tunnelling microscopy of metal reactions with silicon.
I present the results of several investigations into the reactions that take place behveen transition metals and the silicon (111) surface. The ability of the STM to measure physical and electronic structure on an atomic-scale permitted the detailed study of several new phenomena. The reactions …
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Application of Femtosecond lasers in confocal and scanning tunnelling microscopy
… and work towards the development of an ultrafast Scanning Tunnelling Microscopy (STM) technique, employing a Ti:sapphire pulsed laser, called Shaken Pulse Pair eXcitation (SPPX) STM. Measurements of the laser intensity, pulse duration and point spread function are used to estimate the peak …
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In Situ Surface Studies of III-V Semiconductor Compounds
Since its advent in the early 1980s, Scanning Tunnelling Microscopy (STM) has been used to advance the knowledge of semiconductor grow processes. Hybridisation of STM with other analytical methods and the Molecular Beam Epitaxy (MBE) growth technique allowed a flexible and diverse approach to …
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Ordering of organic molecules on templated surfaces
… following techniques were used in this study; Scanning Tunnelling Microscopy (STM), Low Energy Electron Diffraction (LEED), Normal Incident X-Ray Standing Waves (NIXSW) and Temperature Programmed Desorption (TPD). The room temperature growth and ordering of trimesic acid on the …
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STM, LEED and photoemission studies of the Sn/Cu(100) surface alloys
… structures of all five phases are studied using Scanning Tunnelling Microscopy (STM) and surface structure models for all the phases are proposed. Photoemission Spectroscopy (PES) and High-Resolution Core-Level Spectroscopy (HRCLS) studies were carried out using synchrotron radiation in the …
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Thiolate self-assembled monolayers studied with a tuneable infrared low temperature laser driven scanning tunnelling microscope
… of self-assembled monolayers (SAMs) with scanning tunnelling microscopy/spectroscopy (STM/S) and infrared laser-driven STM (LDSTM). As a tool STM is uniquely able to resolve atoms on a surface. Illuminating an STM with infrared radiation tuned to match modes in the SAM used as the sample …
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Molecular manipulation with the scanning tunnelling microscope
… two studies into molecular manipulation using scanning tunnelling microscopy (STM), dissociation of chrolobenzene (PhCl) and of 4,4´ dichlorobiphenyl (PCB) manipulation both on Si(111)-7×7 surface. An ab initio investigation is presented on a possible candidate for future atomic manipulation. …
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The ultra-selective hydrogenation of Furfural on PtCu supported bimetallic nanoparticles and on Pt(111) under ultra-high vacuum
… Programmed Desorption data in conjunction with Scanning Tunnelling Microscopy suggest that the decarbonylation of furfural on clean Pt(111) and the hydrogenation of furfural on hydrogen pre-covered Pt(111) is governed by surface crowding, molecular orientation and hydrogen bonding networks of …
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Probing Entanglement and Symmetry Breaking Orders via Spectroscopies and Machine Learning
… arising near impurities that can be observed via Scanning Tunnelling Microscopy (STM). (2) We study charge orders at the fractional fillings in twisted transition metal dichalcogenide (TMD) bilayers that can be observed directly via STM. The second part is about the prediction of magnetic orders …
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Self-Assembly in Physisorbed Monolayers via Directional Intermolecular Interactions
… interactions. In the initial phase of work, scanning tunnelling microscopy (STM) images of perylene tetracarboxylic diimide on a gold {111} surface are collected, exhibiting an unprecedented level of sub-molecular resolution of the structural detail of the molecular monolayer. In addition to …
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Imaging topological superconductivity in UTe_2
… modes. Low-temperature spectroscopic-imaging scanning tunnelling microscopy is an ideal experimental platform with which to study such a superconductor as it allows direct, high energy resolution measurement of the surface electronic states. Using this tool, we present research conducted over …
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Computational Study of Two-Dimensional Materials for Energy Applications
… Bao of Stanford University used high-resolution scanning tunnelling electron microscopy and selective area electron diffraction to reveal a single crystal-like structure of C60 molecules on a hBN substrate. A comprehensive study revealed twelve orientations of C60 molecules relative to the hBN …