Sökning: "metal oxide nanostructure"

Visar resultat 11 - 15 av 16 avhandlingar innehållade orden metal oxide nanostructure.

  1. 11. Nanoscaled Structures of Chlorate Producing Electrodes

    Författare :Christine Hummelgård; Håkan Olin; Joakim Bäckström; Svein Sunde; Mittuniversitetet; []
    Nyckelord :;

    Sammanfattning : Sodium chlorate is mainly used for production of chlorine dioxide (a pulp bleaching agent). Sodium chlorate is produced by an electrochemical process where chloride ions (from sodium chloride dissolved in water) are oxidized to chlorine on the anodes and hydrogen is evolved on the cathodes. LÄS MER

  3. 12. Infrared Photodetectors based on InSb and InAs Nanostructures via Heterogeneous Integration-Rapid Melt Growth and Template Assisted Selective Epitaxy

    Författare :Heera Menon; NanoLund: Centre for Nanoscience; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Rapid Melt Growth RMG ; Template Assisted Selective Epitaxy TASE ; InSb; InAs; infrared detectors; nBn detector; photoconductor; nanostructures; nanowires;

    Sammanfattning : Monolithic heterogeneous integration of III-V semiconductors with the contemporary Si Complementary Metal Oxide Semiconductor (CMOS) technology has instigated a wide range of possibilities and functionalities in the semiconductor industry, in the field of digital circuits, optical sensors, light emitters, and high-frequency communication devices. However, the integration of III-V semiconductors is not trivial due to the differences in lattice parameters, polarity, and thermal expansion coefficient. LÄS MER

  4. 13. Efficient electrocatalysts based on nitrrogen-doped carbon nanostructures for energy applications

    Författare :Tiva Sharifi; Thomas Wågberg; Pulickel Ajayan; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; fysik; Physics;

    Sammanfattning : Carbon nanostructures have emerged as a key material in nanotechnology and continuously find new areas of applications. Particularly, they are attractive due to their excellent properties as support for catalyst nanostructures leading to highly efficient composite materials for various electrochemical applications. LÄS MER

  5. 14. Engineering inorganic nanostructured composites for boosting H2 and O2 evolution reactions

    Författare :Getachew Solomon; Isabella Concina; Alberto Vomiero; Sixto Gimenez; Luleå tekniska universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Hydrogen evolution HER ; Oxygen evolution reaction OER ; Oxygen reduction reaction ORR ; Water splitting; Electrocatalyst; Atomic layer deposition; Core-shell structure; Experimentell fysik; Experimental Physics;

    Sammanfattning : Hydrogen is considered a promising energy source with zero emission of CO2; it can provide higher energy density compared to other sources of energy. The amount at which H2 is produced, and the method of production need further improvement for the advancement of hydrogen energy technologies. LÄS MER

  7. 15. Non-Coherent Photon Upconversion on Dye-Sensitized Nanostructured ZrO2 Films for Efficient Solar Light Harvesting

    Författare :Jonas Sandby Lissau; Ana Morandeira; James M. Gardner; Leif Hammarström; Josef Michl; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; photon upconversion; triplet-triplet annihilation; DSSC; dye-sensitized; delayed fluorescence; photophysics; solar energy conversion; nanostructured surface; energy migration; Kemi med inriktning mot kemisk fysik; Chemistry with specialization in Chemical Physics;

    Sammanfattning : Photon upconversion by sensitized triplet–triplet annihilation (UC-STTA) is a photophysical process that facilitates the conversion of two low-energy photons into a single high-energy photon. A low-energy photon is absorbed by a sensitizer molecule that produces a triplet excited state which is transferred to an emitter molecule. LÄS MER