Sökning: "IR spectroscopy"

Visar resultat 6 - 10 av 147 avhandlingar innehållade orden IR spectroscopy.

  1. 6. New Electrolyte Materials for Lithium Batteries and Fuel Cells - an ab initio and vibrational spectroscopy study

    Författare :Henrik Markusson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; IR spectroscopy; lithium salts; Raman spectroscopy; ab initio calculations; electron structure calculations; protic ionic liquids; electrolytes;

    Sammanfattning : In order to reduce our fossil based energy consumption there is an urge for new energy storage and conversion devices such as lithium batteries and fuel cells for more efficient energy use. The heart of these devices is an ion conducting electrolyte which needs to provide high performance at low cost. LÄS MER

  3. 7. Excited States of Carotenoids and Their Functions in Light Harvesting

    Författare :Donatas Zigmantas; Kemisk fysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; spektroskopi; magnetic and optical properties; Carotenoids; light-harvesting; excited states; excitation energy transfer; femtosecond spectroscopy; supraconductors; magnetic resonance; electrical; Condensed matter:electronic structure; time-resolved fluorescence spectroscopy; magnetisk resonans; supraledare; magnetiska och optiska ; egenskaper elektriska; Kondenserade materiens egenskaper:elektronstruktur; relaxation; spectroscopy;

    Sammanfattning : The research presented in this thesis is focused on characterization of photophysical properties of lowest singlet excited states of carotenoids and their functions in the process of photosynthetic light harvesting. It is shown that the various light-harvesting complexes utilize different strategies to achieve efficient energy transfer from carotenoids to (bacterio)chlorophylls. LÄS MER

  4. 8. Advances in Stellar Astrophysics from Laboratory Spectroscopy

    Författare :Stefan Ivarsson; Atomfysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Astronomy; iridium; osmium; uranium; oscillator strengths; Spectroscopy; term analysis; line profiles; line structure; astrophysics; Sun; Chi Lupi; 17 Comae A; chemically peculiar; praseodymium; stars; space research; cosmic chemistry; Astronomi; rymdvetenskap; kosmisk kemi; Fysicumarkivet A:2004:Ivarsson;

    Sammanfattning : Investigation of astrophysical plasmas, such as stellar atmospheres, require both knowledge of atomic structure and data. We present laboratory instruments, techniques and tools for acquisition of the data required to derive important atomic parameters such as, wavelengths, oscillator strengths and line profiles. LÄS MER

  5. 9. Conformations of amino acids characterized by theoretical spectroscopy

    Författare :Hongbao Li; Yi Luo; Tanja van Mourik; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; amino acids; spectroscopy; Teoretisk kemi och biologi; Theoretical Chemistry and Biology;

    Sammanfattning : Amino acids are the basic building blocks of proteins. The determinationof their structures plays an important role in correctly describing the functionsof the proteins. LÄS MER

  7. 10. Microfabrication of Optical Components in Synthetic Diamond : Infrared Optics for Applications  in Astronomy and Spectroscopy

    Författare :Ernesto Vargas Catalan; Mikael Karlsson; Thomas Schuelke; Uppsala universitet; []
    Nyckelord :Diamond; microfabrication; microoptics; astronomy; IR-spectroscopy; corongraph; waveguide;

    Sammanfattning : Infrared optics is a broad general term, relevant to a range of fields. The manufactured diamond optical components utilized within this thesis were applied to both astronomy, in which direct imaging of star system using large ground-based telescopes and diamond coronagraphs was performed, and in absorption spectroscopy probing solvents and proteins using a tuneable quantum cascade laser and diamond waveguides. LÄS MER