Search for dissertations about: "Brena"

Found 5 swedish dissertations containing the word Brena.

  2. 1. First principles modeling of soft X-ray spectroscopy of complex systems

    Author : Barbara Brena; Yi Luo; Vincenzo Carravetta; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Molecular; Theoretical chemistry; Teoretisk kemi;

    Abstract : The electronic structures of complex systems have been studied by theoretical calculations of soft x-ray spectroscopies like x-ray photoelectron spectroscopy, near edge x-ray absorption fine structure, and x-ray emission spectroscopies. A new approach based on time dependent density functional theory has been developed for the calculation of shake-up satellites associated with photoelectron spectra. READ MORE

  4. 2. Reversible immobilization of enzymes using agarose-bound group-specific Ligands

    Author : Beatriz M. Brena; Uppsala universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; Mikrobiologi;

    Abstract : .... READ MORE

  5. 3. Molecules and Light : A Journey into the World of Theoretical Spectroscopy

    Author : Iulia Emilia Brumboiu; Barbara Brena; Heather Kulik; Uppsala universitet; []
    Keywords : Theoretical spectroscopy; XPS; NEXAFS; PCBM; Metal phthalocyanine; Organic solar cells; Fysik med inriktning mot atom- molekyl- och kondenserande materiens fysik; Physics with spec. in Atomic; Molecular and Condensed Matter Physics;

    Abstract : Two of the main technological challenges of the century are the production of clean energy, on the one hand, and the development of new materials for electronic and spintronic applications that could increase the speed and the storage capacity of regular electronic devices, on the other hand. Organic materials, including fullerenes, organic polymers and organic molecules with metal centres are promising candidates for low-cost, flexible and clean technologies that can address these challenges. READ MORE

  6. 4. The Electronic Structure of Organic Molecular Materials : Theoretical and Spectroscopic Investigations

    Author : Iulia Emilia Brumboiu; Barbara Brena; Biplab Sanyal; Olle Eriksson; Jakob Schiøtz; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; materials theory; electronic structure; photoelectron spectroscopy; near-edge X-ray absorption fine structure; Physics with spec. in Atomic; Molecular and Condensed Matter Physics; Fysik med inriktning mot atom- molekyl- och kondenserande materiens fysik; Materialvetenskap; Materials Science;

    Abstract : In the present thesis the electronic properties of two organic molecules were studied by means of density functional theory (DFT) in connection to their possible applications in organic photovoltaics and molecular spintronics respectively.The first analysed system is the C60 derivative PCBM extensively used in polymer solar cells for the charge separation process. READ MORE

  7. 5. Complex Excitations in Advanced Functional Materials

    Author : Johann Lüder; Barbara Brena; Frank de Groot; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; X-ray Absorption Spectroscopy; Photoelectron Spectroscopy; Adsorption; Phthalocyanines; Biphenylene; Excitons; Functional Materials;

    Abstract : Understanding the fundamental electronic properties of materials is a key step to develop innovations in many fields of technology. For example, this has allowed to design molecular based devices like organic field effect transistors, organic solar cells and molecular switches. READ MORE