Sökning: "photochromic"

Visar resultat 6 - 10 av 22 avhandlingar innehållade ordet photochromic.

  1. 6. Unconventional Modulation of Diarylethene Photoswitches

    Författare :Wera Larsson; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; photochromic molecules; photochemistry; photon upconversion; molecular photoswitches; triplet-triplet annihilation; diarylethene; nanocrystals; triplet sensitization;

    Sammanfattning : Light can be manipulated and modulated to fit a particular need or application, such as overcoming a spectral mismatch when facilitating a high energy photochemical reaction. This can be of use in various applications, including solar energy conversion and biological contexts. LÄS MER

  3. 7. Exploring Devices for Molecular Solar Thermal Energy Storage Systems

    Författare :Zhihang Wang; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Solar energy; photochromic molecule; dihydroazulene vinylheptafulvene photoswitches; energy conversion; norbornadiene quadricyclane photoswitches; energy storage;

    Sammanfattning : The sun is considered to be one of the most abundant and renewable sources of energy. During recent last decades, technologies for solar energy capture and storage have been significantly investigated. An attractive way to store solar light, is to use photochromic molecules that can capture and store solar energy in chemical bonds. LÄS MER

  4. 8. Supercritical CO2 technology in resource-effectiveproduction of functional and smart textiles

    Författare :Molla Tadesse Abate; Satoko Okubayashi; Högskolan i Borås; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Supercritical CO2; Polyester; Functional textile; Smart textile; Antimicrobial; Antioxidant; UV protection; Textile UV-sensor; Curcumin; Chitosan; Photochromic materials; Photo-grafting; halochromic textile; Resource Recovery; Resursåtervinning;

    Sammanfattning : The demand for functional and smart textiles has risen nowadays due to the lifestyle change of human beings. Along with this, the production of functional and smart textiles is consistently increasing. LÄS MER

  5. 9. Properties of Volume Bragg Gratings and Nonlinear Crystals for Laser Engineering

    Författare :Staffan Tjörnhammar; Fredrik Laurell; Valdas Pasiskevicius; Takunori Taira; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; volume Bragg grating; VBG; thermal effects; nonlinear optics; KTiOPO4; quasi-phase matching; photochromic damage; grey-tracking; color centers; blue-light induced infrared absorption; BLIIRA; Physics; Fysik;

    Sammanfattning : This thesis focuses on two topics: thermal limitations of volume Bragg gratings (VBGs) employed as laser-cavity mirrors and formation of color centers in KTiOPO4 and its isomorphs.To explore the mechanisms of the thermal limitations of VBGs in high power lasers, I designed and constructed a diode-pumped, solid‑state laser with a VBG as cavity mirror that had a significantly higher absorption than what is typical. LÄS MER

  7. 10. The Photochromic Properties of the Heterogeneous System CuCl(s)-H2O(l)

    Författare :Bo Carlsson; Royal Institute of Technology Thesis Department of Physical Chemistry; []
    Nyckelord :Environmental technology; Miljöteknik;

    Sammanfattning : .... LÄS MER