Sökning: "Boron nitride"

Visar resultat 1 - 5 av 45 avhandlingar innehållade orden Boron nitride.

  1. 1. Theoretical modelling of thin film growth in the B-N system

    Författare :Björn Mårlid; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Chemistry; Boron nitride; boron; theoretical modelling; DFT; surface processes; surfaces; thin films; growth ALD; Kemi; Chemistry; Kemi; Inorganic Chemistry; oorganisk kemi;

    Sammanfattning : In vapour phase deposition, the knowledge and control of homogeneous and heterogeneous reactions in connection to precursor design may lead to the deposition of the desired material; structure or phase. This thesis is a document attempting to increase the knowledge of film growth in the B-N system. LÄS MER

  3. 2. Controlling Electronic and Geometrical Structure of Honeycomb-Lattice Materials Supported on Metal Substrates : Graphene and Hexagonal Boron Nitride

    Författare :Nikolay Vinogradov; Nils Mårtensson; Karsten Horn; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; graphene; h-BN; electronic structure; adsorption; doping; nano-templates; PES; NEXAFS; LEEM; STM; Physics with spec. in Atomic; Molecular and Condensed Matter Physics; Fysik med inriktning mot atom- molekyl- och kondenserande materiens fysik;

    Sammanfattning : The present thesis is focused on various methods of controlling electronic and geometrical structure of two-dimensional overlayers adsorbed on metal surfaces exemplified by graphene and hexagonal boron nitride (h-BN) grown on transition metal (TM) substrates. Combining synchrotron-radiation-based spectroscopic and various microscopic techniques with in situ sample preparation, we are able to trace the evolution of overlayer electronic and geometrical properties in overlayer/substrate systems, as well as changes of interfacial interaction in the latter. LÄS MER

  4. 3. Theoretical Investigations of Boron Related Materials Using DFT

    Författare :Igor Arvidsson; Karin Larsson; Jan-Otto Carlsson; Robert Jones; Uppsala universitet; []
    Nyckelord :Inorganic chemistry; boron nitride; density functional theory; chemical vapour deposition; atomic layer deposition; surface reactivity; adsorption; abstraction; computational chemistry; Oorganisk kemi;

    Sammanfattning : In the history of Chemistry, materials chemists have developed their ideas mainly by doing experiments in laboratories. The underlying motivation for this laboratory work has generally been pure curiosity or the ambition to find a solution to a specific problem. LÄS MER

  5. 4. Chemical vapour deposition of sp2-hybridised B-C-N materials from organoborons

    Författare :Laurent Souqui; Anne Henry; Hans Högberg; Henrik Pedersen; John R. Abelson; Linköpings universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; boron nitride; epitaxy; CVD; boron carbide; carbonitride; PECVD;

    Sammanfattning : Thin films of sp2-BN are promising materials for graphene and deep-UV optoelectronics. They are typically deposited by thermally activated chemical vapour deposition (CVD) from triethylboron (TEB) and ammonia (NH3) at 1500 °C, albeit in a narrow process window. LÄS MER

  7. 5. Chemical Vapour Deposition of sp2 Hybridised Boron Nitride

    Författare :Mikhail Chubarov; Anne Henry; Henrik Pedersen; Hans Högberg; Robert F. Davis; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : The aim of this work was to develop a chemical vapour deposition process and understand the growth of sp2 hybridised Boron Nitride (sp2-BN). Thus, the growth on different substrates together with the variation of growth parameters was investigated in details and is presented in the papers included in this thesis. LÄS MER