Sökning: "electrochemical imaging"

Visar resultat 6 - 10 av 24 avhandlingar innehållade orden electrochemical imaging.

  1. 6. Electrochemical Studies of Aging in Lithium-Ion Batteries

    Författare :Matilda Klett; Göran Lindbergh; Charles Delacourt; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; aging; EIS modeling; electrolyte characterization; graphite; hybrid electric vehicles; impedance spectroscopy; LiFePO4; Li-ion batteries;

    Sammanfattning : Lithium-ion batteries are today finding use in automobiles aiming at reducing fuel consumption and emissions within transportation. The requirements on batteries used in vehicles are high regarding performance and lifetime, and a better understanding of the interior processes that dictate energy and power capabilities is a key to strategic development. LÄS MER

  3. 7. Electrochemical and microscopic analysis of chemical signalling in biological systems

    Författare :Anna Larsson; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Cellular communication is a prerequisite in multicellular organisms in order to survive. Many times, this communication occurs through the highly controlled and regulated release of chemical signals through a process known as exocytosis. LÄS MER

  4. 8. Characterizing ions in solution by NMR methods

    Författare :Marianne Giesecke; István Furó; Peter Griffiths; KTH; []
    Nyckelord :electrophoretic NMR; diffusion NMR; NMR imaging; ion pairing; ion association; polyethylene oxide; metal-ion complex; Li ion batteries; electrolyte characterization; Kemi; Chemistry;

    Sammanfattning : NMR experiments performed under the effect of electric fields, either continuous or pulsed, can provide quantitative parameters related to ion association and ion transport in solution.  Electrophoretic NMR (eNMR) is based on a diffusion pulse-sequence with electric fields applied in the form of pulses. LÄS MER

  5. 9. Atmospheric corrosion of Mg and MgAl alloys – characterization and mechanisms

    Författare :Mehrdad Shahabi Navid; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; EDX; CO2; XPS; Mg and MgAl alloys; NaCl; Atmospheric corrosion; Characterization; 3D imaging; SEM; BIB; Thin film; FTIR; XRD; Pitting; Interference microscopy; FIB;

    Sammanfattning : The atmospheric corrosion of Mg and MgAl alloys was investigated. Corrosion tests were performed in the laboratory under controlled environment. CP Mg, AM50 and AZ91 samples were exposed at 95% RH and 22°C in the presence and in the absence of 400 ppm CO2 for 24 h to 672 h. The passive film was characterized by means of XPS, FTIR, AES and XRD. LÄS MER

  7. 10. Electrochemically etched pore arrays in silicon for X-ray imaging detectors

    Författare :Xavier Badel; Jan Linnros; Volker Lehmann; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electrophysics; Elektrofysik; Electrophysics; Elektrofysik;

    Sammanfattning : Digital devices have now been introduced in many X-ray imaging applications, replacing slowly traditional photographic films. These devices are preferred as they offer real time imaging, easy handling and fast treatment of the images. LÄS MER