Sökning: "Scanning electron microscopy SEM"

Visar resultat 11 - 15 av 256 avhandlingar innehållade orden Scanning electron microscopy SEM.

  1. 11. Towards the Integration of Carbon nanostructures into CMOS technology

    Författare :Mohammad Kabir; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; transmission electron microscopy TEM .; chemical vapour deposition CVD ; electron beam lithography EBL ; carbon nanotube CNT ; silicidation; atomic force microscopy AFM ; carbon nanofiber CNF ; Complementary metal oxide semiconductor CMOS ; dc-glow discharge plasma; growth mechanism; metal catalyst; scanning electron microscopy SEM ;

    Sammanfattning : Relentless efforts for miniaturization of traditional complementary metal oxide semiconductor (CMOS) devices have reached the limit where the device characteristics are governed by quantum phenomena which are difficult to control. This engendered a need for finding alternative new materials that can be engineered to fabricate devices that will possess at least the same or even better performance than existing CMOS devices. LÄS MER

  3. 12. Nanoscale Characterisation of Barriers to Electron Conduction in ZnO Varistor Materials

    Författare :Mattias Elfwing; Peter Lagerlöf; Uppsala universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Materials science; ZnO varistor material; TEM; SEM; EBIC; ESEM; electron holography; Materialvetenskap; Materials science; Teknisk materialvetenskap; Solid State Physics; fasta tillståndets fysik;

    Sammanfattning : The work presented in this thesis is concerned with the microstructure of zinc oxide varistor materials used in surge protecting devices. This class of material has been characterised with special emphasis on the functional microstructure and the development of the microstructure during sintering. LÄS MER

  4. 13. Bioelectronic Nanosensor Devices for Environmental and Biomedical Analysis

    Författare :Klas Risveden; Tillämpad biokemi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Regional Ion Sensitive Field Effect Transistor; Region Ion Sensitive Field Effect Transistor; RISFET; Conducting channel; Bioelectronic Nanosensor; Bioelectronic; Biosensor; Nanosensor; Chemical Sensor; Sensor; Semiconductor sensor; Single molecule trapping; Scaling; Protein trapping; Nanoelectronics; Lab-on-a-chip; pico-ammeter; Nanobiosensor; Sample Applicator; Sequential Batch Analysis; Sequential Batch Analysis System; SBAS; Nanowire; Branched nanowire structure; Nanotree; Nanorod; Nano processing; Micro processing; Electron Beam Lithography; EBL; UV-lithography; Molecular Imprinting; DUV-lithography; Moleculary Imprinted Polymers; MIP; Biomimetics; QCM; Biomimetic sensor; Quartz Crystal Microbalance; QCM-D; Nanoparticles; Acetylcholine esterase; Glucose oxidase; Glucose; Gluconolactone; Propranolol; Gluconate; Carbofuran; Neurotoxic; Environmental analysis; Biomedical Analysis; Biotechnology; Medicine; Pesticide; Food Technology; Analyis; Flow Injection Analysis; FIA; Scanning Probe Microscopy; Scanning Kelvin Probe Microscopy; SPM; KPM; AFM; SKM; KPFM; SKPM; Nanostructures.; Atomic Force Microscopy; KFM;

    Sammanfattning : A new type of Bioelectronic Nanosensor Device with potential applications in medicine,biotechnology and environmental analysis was designed. The nanosensor is based on RISFET (Regional Ion Sensitive Field Effect Transistor) technology. LÄS MER

  5. 14. The enterocyte in small intestinal adaption : an experimental and clinicopathological study with special reference to the ultrastructure of the brush border

    Författare :Roger Stenling; Umeå universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Scanning electron microscopy; transmission electron microscopy; stereology;

    Sammanfattning : The small intestine mucosa is known to be able to adapt itself to several kinds of both physiological and pathological conditions. The adaptive patterns of the structure of the enterocytes, particularly their apical surface (brush border), were studied in three models: (1) in rats, subjected to antrectomy or antral exclusion, combined with gastroduodenostomy and gastrojejunostomy; (2) in rats with alloxan dia­betes; (3) in children with coeliac disease; a) in its active phase; b) after long-term treatment with gluten-free diets; c) after long-term challenge with dietary gluten following treatment; d) after short-term elimination of dietary gluten. LÄS MER

  7. 15. On Bone Regeneration in Porous Bioceramics - Studies in humans and rabbits using free form fabricated scaffolds

    Författare :Johan Malmström; Göteborgs universitet; []
    Nyckelord :bone regeneration; hydroxyapatite; zirconia; macroporosity; microporosity; free form fabrication; focused ion beam; scanning electron microscopy; transmission electron microscopy; rabbit; human;

    Sammanfattning : The objective of the present thesis was to evaluate the effect of material chemistry and macroand micro-porosity on bone regeneration in association with synthetic, porous ceramic materials. Ceramic scaffolds were designed and manufactured for experimental and human studies using free form fabrication (FFF), a technique which produces the object layer by layer using data from CAD files. LÄS MER