Sökning: "Direct electron transfer"

Visar resultat 31 - 35 av 72 avhandlingar innehållade orden Direct electron transfer.

  1. 31. Blue copper proteins as bioelements for bioelectronic devices

    Författare :Olga Aleksejeva; Malmö universitet; []
    Nyckelord :Blue copper protein; Multicopper oxidase; Direct electron transfer; Oxygen bioelectroreduction; Enzymatic fuel cell; Biosupercapacitor;

    Sammanfattning : This thesis is focused on bioelements for biological electric power sources,specifically, on blue copper proteins with and without an intrinsic biocatalyticactivity, i.e. ability to reduce oxygen directly to water. These proteins, viz. LÄS MER

  3. 32. Tuning electron transfer reactions by selective excitation in porphyrin-acceptor assemblies

    Författare :Mikael Andersson; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physics; Fysik; Physics; Fysik; Physical Chemistry; fysikalisk kemi;

    Sammanfattning : This thesis concerns electron transfer reactions from different excited states in porphyrins, and the effect of changing the energy of the link connecting the donor and acceptor. Photoinduced electron transfer, and subsequent processes were studied using ultrashort laser pulses and nanosecond laser flash photolysis. LÄS MER

  4. 33. Diamond Devices Based on Valley Polarization

    Författare :Nattakarn Suntornwipat; Jan Isberg; Markus Gabrysch; Saman Majdi; Hitoshi Umezawa; Uppsala universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; CVD diamond; valleytronics; Negative Differential Mobility; NDM; electron polarization; Time-of-Flight; magnetotransport; carrier transport; drift velocity; valley-transistor; Transferred-Electron Oscillator; TEO; TED; Gunn diode;

    Sammanfattning : Diamond is a wide bandgap semiconductor with extreme properties such as high thermal conductivity, high breakdown field, high carrier mobilities and chemical inertness. These properties together with the possibility to synthesize high purity Single-Crystalline (SC) diamond by Chemical Vapor Deposition (CVD), make it a very interesting material and a candidate for use in power electronics and in hazardous environments. LÄS MER

  5. 34. Interfacial Analysis and Charge Transfer in Solar Cells

    Författare :Xinjian Geng; Jacinto Sá; Ellen Moons; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Perovskites; Charge Transport Layer; Plasmonics; Hot Carriers; Interfaces; Photoluminescence; Solar Cells; Chemistry with specialization in Physical Chemistry; Kemi med inriktning mot fysikalisk kemi;

    Sammanfattning : Harnessing sunlight through solar cells is vital for sustainable energy production. The conventional architecture of a solar cell consists of multilayers of materials, each serving a particular function. The absorbing layer converts the solar energy into valuable electricity by the photovoltaic effect. LÄS MER

  7. 35. Synthesis and characterization of palladium based carbon nanostructure-composites and their clean-energy application

    Författare :Florian Nitze; Thomas Wågberg; Ludvig Edman; Kordas Krisztian; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Carbon nanostructures; chemical vapour deposition; electro catalysts; transmission electron microscopy; direct formic acid fuel cells; Solid State Physics; fasta tillståndets fysik;

    Sammanfattning : Carbon nanostructures are a wide field with many applications. The use of carbon nanostructures as support in heterogeneous catalysis is a key development that led together with the use of nanoparticles to a significant cost reduction of catalysts. Catalysts designed in this way are widely applied in fuel cell technologies. LÄS MER