Sökning: "deposition velocity"

Visar resultat 21 - 25 av 64 avhandlingar innehållade orden deposition velocity.

  1. 21. Electron transport properties of graphene and graphene field-effect devices studied experimentally

    Författare :Youngwoo Nam; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; dual-gated graphene field effect devices; thermopower; quantum Hall effect; graphene; Aharonov-Bohm effect; chemical vapour deposition;

    Sammanfattning : This thesis contains experimental studies on electronic transport properties of graphene with the Aharonov-Bohm (AB) effect, thermopower (TEP) measurements, dual-gated graphene field effect devices, and quantum Hall effect (QHE). Firstly, in an effort to enhance the AB effect in graphene, we place superconducting-metal (aluminium) or normal-metal (gold) mirrors on the graphene rings. LÄS MER

  3. 22. Integration of epitaxial SiGe(C) layers in advanced CMOS devices

    Författare :Julius Hållstedt; Henry Radamson; Eugene A. Fitzgerald; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Silicon Germanium Carbon SiGeC ; Chemical Vapor Deposition CVD ; Epitaxy; Pattern Dependency; MOSFET; Mobility; Spacer Gate Technology; Semiconductor physics; Halvledarfysik;

    Sammanfattning : Heteroepitaxial SiGe(C) layers have attracted immense attention as a material for performance boost in state of the art electronic devices during recent years. Alloying silicon with germanium and carbon add exclusive opportunities for strain and bandgap engineering. LÄS MER

  4. 23. Aerosol Exchange between Forests and the Atmosphere : Fluxes over a Tropical and a Boreal Forest

    Författare :Lars Ahlm; Douglas Nilsson; David Fowler; Stockholms universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; Applied Environmental Science; tillämpad miljövetenskap;

    Sammanfattning : The main goal of this thesis was to investigate primary biogenic aerosol emission from the Amazon rain forest through measurements of vertical turbulent aerosol number fluxes. In addition, the particle dry deposition sink has been analysed and quantified, and is also compared with the dry deposition sink at a boreal forest site. LÄS MER

  5. 24. Modelling Transport of Non-Spherical Particles in Small Channel Flow

    Författare :Elise Holmstedt; Staffan Lundström; Hans Åkerstedt; Wook Ryol Hwang; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Strömningslära; Fluid Mechanics;

    Sammanfattning : A model has been developed to predict the movement of oblate and prolate particles on amicro- and nano-scale in laminar channel flow, both for purposes of statistical aggregationand to study motion of single particles. For the purpose of this thesis the model has beenadapted to examine particle deposition patterns in the human lung and the filtration ofparticles during manufacturing of composites, but the possibilities of the model extendto all areas where the particle Stokes and Reynolds numbers are small. LÄS MER

  7. 25. On drops and turbulence in nuclear fuel assemblies of Boiling Water Reactors

    Författare :Diana Caraghiaur; Henryk Anglart; Michele Andreani; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : The study aims to develop the understanding of the mechanistic-type approach to quantify drop deposition in nuclear fuel assemblies of Boiling Water Reactors. This includes the effect of spacers. LÄS MER