Sökning: "Au 111"

Visar resultat 1 - 5 av 6 uppsatser innehållade orden Au 111.

1. 1. Structural analysis of HZO thin film and electrode using X-ray diffraction

   Kandidat-uppsats, Lunds universitet/Synkrotronljusfysik; Lunds universitet/Fysiska institutionen

   Författare :Elliot Winsnes; [2024]
   Nyckelord :HZO; hafnia; hafnium dioxide; zirconium dioxide; ferroelectricity; ferroelectric; synchrotron radiation; X-ray diffraction; Physics and Astronomy;

   Sammanfattning : Since its discovery in 2011, the ferroelectricity of thin films based on HfO2 has been studied intensively. In particular, thin films with a 1:1 ratio of HfO2 and ZrO2 (HZO) has been of great interest. The ferroelectricity arises from a non-centrosymmetric orthorhombic (o) phase of HZO whose prevalence is dependent on the processing conditions. LÄS MER

3. 2. BCP Lithography Defined Arrays of InAs NWs Grown Using MOVPE with Au Seeds

   Master-uppsats, Lunds universitet/Lunds Tekniska Högskola; Lunds universitet/Fasta tillståndets fysik

   Författare :Björn Landeke-Wilsmark; [2022]
   Nyckelord :Physics and Astronomy;

   Sammanfattning : In this report we outline a detailed process flow for a quick and inexpensive implementation of large dense arrays of InAs nanowires (NWs) grown in the reactive ion etching/etched (RIE) pores of a SiO2/SiNx mask on top of an InAs/Si(111) substrate. The self-assembled (hexagonally close-packed) pattern of poly(methyl-methacrylate) (PMMA) cylinders in a poly(styrene) (PS) matrix adopted by a linear diblock poly(styrene-block-methyl-methacrylate) P(S-b-MMA) block-copolymer (BCP) was transferred to the dielectric stack (consisting of a ≈10 nm plasma enhanced chemical vapour deposition/deposited (PECVD) SiNX layer topped by a thin atomic layer deposition/deposited (ALD) SiO2 film) using a two-step RIE procedure. LÄS MER

4. 3. Everything you wanted to know about the TPA molecule adsorbed on Au(111)

   Master-uppsats, Uppsala universitet/Materialteori

   Författare :Pamela H.W. Svensson; [2020]
   Nyckelord :Everything; you; wanted; to; know; about; TPA; molecule; adsrobed; on; Au; Au 111 ; Triphenylamin; Triphenylamine; DFT; Quantum; Espresso; QE; Generating; Pseudopotentials; NEXAFS; DOS; PDOS; simulations; organic; solar; cell; perovskite; HTM; HCH; NCH; FCH; PP; geometry; optimization;

   Sammanfattning : The electronic properties of Triphenylamine (TPA) in gas phase and adsorbed on gold(111) have been simulated with Quantum Espresso using Density Functional Theory (DFT). To better understand how the presence of a gold surface affects sunlight absorption in the system, partial Density Of States (pDOS) and Near Edge X-ray Absorption Fine Structure (NEXAFS) of the system have been calculated. LÄS MER

5. 4. Theoretical study of orientations of biofunctionalized thiolates on Au(111) surface

   Master-uppsats, Beräkningsfysik; Tekniska högskolan

   Författare :Jonas Hådén; [2012]
   Nyckelord :computational physics; biofunctionalized thiolate;

   Sammanfattning : A theoretical analysis of the orientation of biofunctionalized thiolate has been made by changing the surface configuration. The results show that it is possible to match the experimental data by changing the molecular density and also that it is possible to match the experimental data using only hollow sites in the gold surface as placements for the molecules. LÄS MER

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

   Kandidat-uppsats, Lunds universitet/Fysiska institutionen; Lunds universitet/Synkrotronljusfysik

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

   Sammanfattning : 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. LÄS MER