Essays about: "LEED Low Energy Electron Diffraction"

Showing result 1 - 5 of 8 essays containing the words LEED Low Energy Electron Diffraction.

  1. 1. Electron Assisted Growth of Graphene atop Ir(111) supported Hexagonal Boron Nitride

    University essay from Lunds universitet/Synkrotronljusfysik; Lunds universitet/Fysiska institutionen

    Author : Lassi Linnala; [2019]
    Keywords : Two-dimensional materials; Two-dimensional heterostructures; Graphene; hexagonal Boron Nitride; STM; LEED; Physics and Astronomy;

    Abstract : Vertical heterostructures between graphene (Gr) and hexagonal boron nitride (hBN) have attracted a great deal of interest, due to their potential applications in the semiconductor industry as new and superior transistor materials. The direct growth of the heterostucture still remains challenging and in this bachelor thesis, I report a novel electron assisted growth technique, which is used to attempt to grow Gr atop hBN atop an Ir(111) single crystal surface. READ MORE

  3. 2. CO induced faceting of Rh(553)

    University essay from Lunds universitet/Fysiska institutionen; Lunds universitet/Synkrotronljusfysik

    Author : Ka Sin Lai; [2015]
    Keywords : Science General;

    Abstract : We have investigated the CO induced faceting of a Rh(553) surface using Scanning Tunneling Microscope (STM), Low Energy Electron Diffraction (LEED) and Auger Electron Spectroscopy (AES). The sample was exposed to a CO pressure of 1x10^-3 mbar, at different sample temperatures. READ MORE

  4. 3. Iron Oxide Thin Film Growth On Ag(100)

    University essay from Lunds universitet/Fysiska institutionen; Lunds universitet/Synkrotronljusfysik

    Author : Sara Ataran; [2014]
    Keywords : Surface Science; Material Science; XPS X-Ray Photoelectron Spectroscopy ; STM Scaning Tunneling Microscopy ; LEED Low Energy Electron Diffraction ; Science General;

    Abstract : This thesis presents a study of iron oxide thin films, grown on a silver metal substrate, with the goal of characterizing the structures that form during growth of the first atomic layers. Such ultra-thin iron oxides are interesting model materials for fundamental surface chemistry and catalysis studies. READ MORE

  5. 4. Studies of Au Clusters on a Graphene Covered Ir(111) substrate: Cluster Growth and CO Adsorption

    University essay from Lunds universitet/Fysiska institutionen; Lunds universitet/Synkrotronljusfysik

    Author : Johan Knutsson; [2012]
    Keywords : Au; Clusters; Graphene; XPS; LEED; CO; Catalysis; Activity; Physics and Astronomy;

    Abstract : The chemical properties of 0.2-1 ML Au clusters have been studied using X-ray photoelectron spectroscopy (XPS). By exposing the clusters to CO, at 10^-7 mbar, in periods of two minutes, while systematically increasing the cluster size, a correlation between cluster size and CO adsorption was found. READ MORE

  6. 5. STM Study of PTCDA on Pb/Si(111) 1×1

    University essay from Fakulteten för teknik- och naturvetenskap

    Author : David Juteräng; [2012]
    Keywords : PTCDA; STM; Silicon; Lead;

    Abstract : The interaction and orbital energy levels of 3,4,9,10-perylene-tetracarboxylic dianhydride (PTCDA) molecules on a Pb/Si(111) 1x1 substrate have been investigated. A Si(111) sample was annealed to form the 7x7 configuration. 1.5 monolayer of Pb was evaporated onto the surface, which was then annealed. READ MORE