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 11 of 11 for “"Tunnelling Spectroscopy"”.
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AN INVESTIGATION OF INELASTIC ELECTRON TUNNELLING SPECTROSCOPY
… programme to investigate Inelastic Electron Tunnelling Spectroscopy (lETS). A description of the technique of lETS is given. As the main aim of this work was to produce a working facility for lETS, details of the construction of an lET spectrometer are given. This is followed by a description …
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INELASTIC ELECTRON TUNNELLING SPECTROSCOPY (lETS) OF SILANE COUPLING AGENTS
Inelastic Electron Tunnelling Spectroscopy (lETS) has been used to study monolayers of silane coupling agents adsorbed on aluminium oxide. The technique of lETS is surface specific and uses electrons to excite vibrational modes of the adsorbate. Since the tunnelling electrons perturb both the …
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A DIGITAL DATA ACQUISITION SYSTEM FOR INELASTIC ELECTRON TUNNELLING SPECTROSCOPY
A digital inelastic electron tunnelling spectrometer has been designed, constructed and implemented. Full details of hardware software and calibration are presented. The spectrometer has been used in a detailed inelastic electron tunnelling spectroscopy (IETS) study of benzoate anion (C6H5C00) …
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Measurement of electron-electron interactions in one dimension with tunnelling spectroscopy
… related to experimental observables, such as the tunnelling current between the double quantum wells in this work. This thesis consists of three parts. Part one concerns the theories of the various many-body models and the experimental technique: Chapter 1 briefly introduces the concept of Fermi …
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EXAFS and Related Studies of Materials for Polymer Battery Use
… included DSC, EXAFS and VTPM. Impedance spectroscopy was employed to determine the sample conductivity as a function of temperature. The polymer electrolytes were of the form PEOn:MX2, where n represents the number of ethylene oxide repeat units associated with the cation M and typically …
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Electron Tunnelling Study of High-Temperature Superconductors
… The aim of this work was to use electron tunnelling spectroscopy to measure the density of excitation states of the recently discovered high-temperature superconductors. Tunnelling is the most sensitive method for measuring a superconductor’s energy gap, and historically has provided …
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THE DURABILITY OF PHENOLIC ADHESIVES
… failure in the joints, the technique of Electron Spectroscopy for Chemical Analysis (ESCA) was employed. Examination by ESCA revealed that, in many instances, the mode of failure was complicated and also. In some cases, contrary to the visual evidence. To complete the surface study, the phenolic …
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Semiconductor nanodevices as a probe of strong electron correlations
… of many-body modes using a momentum-resolved tunnelling spectroscopy technique in gated 1D wires connected via air-bridges. We map the 1D dispersion in a variety of devices, both in and out of equilibrium, and observe the formation of two separate Fermi seas, associated with spin and charge …
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Structural studies of Copper Tetra-Tert-Butyl Phthalocyanine Langmuir-Blodgett and vacuum deposited films
… have a Stranski-Krastanov structure. Scannzng Tunnelling Microscope (STM) zmages of CuTiTPc on Ag/Si(lll)-(4 xJ3)R30° found the molecules to be flat lying. The sulface was htghly ordered aiid densely packed with molecules forming rows, which ran parallel to each other. Scanning Tunnelling …
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Funkcionalizace grafenu pomocí interkalace a molekulárního dopování
Tato diplomová práce se zaměřuje na přípravu a charakterizaci nekovalentně funkcionalizovaných vrstev grafenu narostlých na slabě interagujícím substrátu Ir(111). V práci je nejprve zkoumána modifikace grafenové vrstvy pomocí jednotlivých funkcionalizačních metod zvlášť, včetně interkalace atomů …