Sökning: "nanometer structures"

Visar resultat 1 - 5 av 80 avhandlingar innehållade orden nanometer structures.

  1. 1. Transmission of slow highly charged ions through nano-structures

    Författare :Nadeem Akram; Reinhold Schuch; Friedrich Aumayr; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Highly charged ions; nano-structures; nanocapillaries; ion-guiding; fysik; Physics;

    Sammanfattning : This thesis is based on experimental investigations of transmitting slow highly charged ions through nano-structures of various cross-sections. Transmission through rhombic and rectangular nanocapillaries in muscovite and phlogopite mica, respectively, is used to study the guiding and shaping of highly charged ion beams. LÄS MER

  3. 2. Low and High Energy Ion Beams in Nanotechnology

    Författare :Thomas Winzell; Kärnfysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; ion implantation; magnetic materials; ERDA; nanometer structures; Nuclear physics; MeV Ions; lithography; Kärnfysik; Fysicumarkivet A:2000:Winzell;

    Sammanfattning : In this thesis, two ways of fabrication of nanometer-sized semiconductor features are presented. Low Energy Ion Implantation (LEII) has been used to create shallow (sub-50 nm) and laterally small (5 m m – 200 nm) features by 10 keV As+ doping of B background doped Si. LÄS MER

  4. 3. Magnetic Order in Artificial Structures

    Författare :Unnar B. Arnalds; Björgvin Hjörvarsson; Sveinn Ólafsson; Vassilios Kapaklis; Hartmut Zabel; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : The topic of this thesis is the investigation of the magnetic properties of artificially created magnetic structures. Applying different characterization techniques, ranging from direct imaging methods to reciprocal space techniques, the properties of lithographically patterned arrays of magnetic thin film and multilayer elements are investigated by exploring their magnetic state, extending from the atomic scale up to collective ordering phenomena of nano-magnetic elements. LÄS MER

  5. 4. On the importance of nanometer structures for implant incorporation in bone tissue

    Författare :Lory Melin Svanborg; Malmö högskola; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES;

    Sammanfattning : Introduction Replacing lost teeth with dental implants is today a reliable treatment method associated with good long-term clinical results. Different surface modifications alter the surface topography at micro- and nanometer level of resolution as well as chemical properties, which have shown to be of importance for osseointegration. LÄS MER

  7. 5. Nanoscaled Structures in Ruthenium Dioxide Coatings

    Författare :Christine Malmgren; Håkan Olin; Joakim Bäckström; Mittuniversitetet; []
    Nyckelord :Bleaching chemicals; sodium chlorate; ruthenium dioxide; electrodes; crystallites; nanowires; microscopy; diffraction; electrocatalytic area; reduced energy consumption; NATURAL SCIENCES; NATURVETENSKAP;

    Sammanfattning : An essential ingredient in the generation of environmentally compatible pulp bleaching chemicals is sodium chlorate. Chlorate is produced in electrochemical cells, where the electrodes are the key components. In Sweden the so-called DSA !R electrodes with catalytic coatings have been produced for more than 35 years. LÄS MER