Search for dissertations about: "Upconversion nanoparticles"

Showing result 1 - 5 of 7 swedish dissertations containing the words Upconversion nanoparticles.

  2. 1. Advancing Upconversion Emissions for Biomedical Imaging

    Author : Haichun Liu; Atomfysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; upconverting nanoparticles; luminescence; fluorescence; inverse problem; biomedical optics; biomedical imaging; photon migration; upconversion; tomography; saturation; Fysicumarkivet A:2014:Liu;

    Abstract : During the past decade, upconverting nanoparticles (UCNPs) doped with rare earth ions have become an important class of fluorescence contrast agents for molecular imaging, due to their unique properties. Their property of anti-Stokes luminescence, with both the excitation and emission wavelengths close to the optimal for biomedical imaging, has been extensively explored in various biomedical applications. READ MORE

  4. 2. Development of Nanoparticle Sensitized Solar Cells

    Author : Chunze Yuan; Hans Ågren; Anders Hagfeldt; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; quantum dots; quantum rods; nanoparticles; solar cells; colloidal; type-II; electron extraction; alloy; organic electrolyte; energy relay; upconversion.;

    Abstract : In this thesis, I have been working with the development of nanoparticle sensitized solar cells. In the subarea of quantum dot sensitized solar cells (QDSCs), I have investigated type-II quantum dots (QDs), quantum rods (QRs) and alloy QDs, and developed novel redox couples as electrolytes. READ MORE

  5. 3. Studies of optical properties of lanthanide upconversion nanoparticles for emerging applications

    Author : Qingyun Liu; Hans Ågren; Haichun Liu; Patricia Haro Gonzalez; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Upconversion nanoparticles; solar cells sensitization; near infrared photodetector; multiplex imaging; optical encoding; information technology; bioimaging; rate equation models; Theoretical Chemistry and Biology; Teoretisk kemi och biologi;

    Abstract : YTTERBY, a small village very close to Stockholm where I live, is the place in the world which has lent its name to the largest number of elements in the periodic table, namely four - YTTRIUM, YTTERBIUM, ERBIUM and TERBIUM. Three more lanthanide elements were discovered from the now empty quarry located in this village. READ MORE

  6. 4. Towards Undistorted Fluorescence for Tissue Diagnostics and Therapy Monitoring

    Author : Haiyan Xie; Atomfysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; upconversion; upconverting nanoparticles; fluorescence-guided-surgery; fluorescence diagnostics; photodynamic therapy; multi-spectral imaging; spectroscopy; biomedical optics; fluorescence; Fysicumarkivet A:2014:Xie;

    Abstract : Fluorescence techniques for applications in tissue diagnostics and therapy monitoring were investigated and developed in the work presented in this thesis. The aim was to develop fluorescence diagnostics for the detection of malignant tumors and better delimitation of the tumor margins, using the enhanced contrast in fluorescence between tumor and surrounding healthy tissue. READ MORE

  7. 5. Synthesis, characterisation and applications of iron oxide nanoparticles

    Author : German Salazar Alvarez; Manoun Muhammed; Jarl B. Rosenholm; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Materials science; biochemistry; electricity and magnetism; optics; Materialvetenskap; Materials science; Teknisk materialvetenskap;

    Abstract : Further increase of erbium concentrations in Er-doped amplifiers and lasers is needed for the design of efficient, reliable, compact and cost-effective components for telecommunications and other photonic applications. However, this is hindered by Er concentration dependent loss mechanism known as upconversion. READ MORE