Essays about: "Chemical Cluster"

Showing result 21 - 25 of 30 essays containing the words Chemical Cluster.

  1. 21. Quantum chemical studies of the chloride-based CVD process for Silicon Carbide

    University essay from Institutionen för fysik, kemi och biologi; Tekniska högskolan

    Author : Emil Kalered; [2012]
    Keywords : silicon; carbide; CVD; chloride; surface; chemistry; quantum; adsorption; transition; band gap; Emil; Kalered;

    Abstract : In this report the interaction between SiH2 molecules and a SiC-4H (0001) surface and SiCl2 molecules and a SiC-4H (0001) surface is investigated. This is done using a cluster model to represent the surface. First the clusters are investigated by calculating some properties to compare with experimental data to motivate the use of the cluster model. READ MORE

  3. 22. 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

  4. 23. ZnO nanoparticles : synthesis of Ga-doped ZnO, oxygen gas sensing and quantum chemical investigation

    University essay from Institutionen för fysik, kemi och biologi

    Author : Alexander Hagelin; [2011]
    Keywords : ZnO zinc oxide gallium Ga doped indium In O2 oxygen gas sensing quantum chemical quantum chemistry computational chemistry synthesis combustion EDOC electrochemistry wet chemical XRD SEM DOS HOMO LUMO nitrogen dioxide NO2 response Langmuir;

    Abstract : Doped ZnO nanoparticles were synthesized by three different methods – electrochemical deposition under oxidizing conditions (EDOC) , combustion method and wet chemical synthesis – for investigating the oxygen gas sensing response. Ga-doped ZnO was mostly synthesized but also In-doped ZnO was made. READ MORE

  5. 24. Chemical abundances in main-sequence stars in open cluster M67

    University essay from Teoretisk astrofysik

    Author : Nemo van den Brink; [2011]
    Keywords : Chemical abundance; Diffusion; Solar Twin; M67; Spectroscopy;

    Abstract : The discovery of a solar twin in the open star cluster M67 (Önehag et al. 2011) implies a near-solar chemical composition for the cluster. READ MORE

  6. 25. TREATMENT OF WASTE WATER FROM A FISH CONSERVATION INDUSTRY : Flocculation Experiment and Analysis

    University essay from Sektionen för ekonomi och teknik (SET)

    Author : Jenny Gärde; [2011]
    Keywords : Flocculation;

    Abstract : Tjörn is a cluster of islands, located in Västra Götaland’s county, on the west coast of Sweden. A fishing industry called Kädesholmen Seafood AB is located at Kädesholmen, one of the larger islands of Tjörn. The industry produces different types of fish preserves. READ MORE