Sökning: "Nanoparticle enhancement"

Visar resultat 1 - 5 av 31 avhandlingar innehållade orden Nanoparticle enhancement.

  1. 1. Development and Use of Optical Sensors in Modern Analytical Chemistry

    Författare :Aron Hakonen; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Optical sensors; Optodes; Imaging sensors; Fluorescence; pH; Ammonium; Sensing; Nanoparticle enhancement; Plasmonics;

    Sammanfattning : A successful long-term high resolution imaging experiment in marine sediments was performed (17 days within the sample; Paper I). The time correlated calibration procedure was evolved to include parametric sigmoidal and logarithmic functions to provide three of the best performing (optical) pH sensors available up to date (Papers II, III and IV), precision of these sensors were in the 0. LÄS MER

  3. 2. Nanoparticle plasmon influence on the charge carrier generation in solar cells

    Författare :Carl Hägglund; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; solar cells; finite element method; nanoparticle plasmons; photovoltaics; nanofabrication; Si; dye sensitized solar cells; localized surface plasmon resonances;

    Sammanfattning : Global warming is a potential threat to life on earth and to human society. It is by much evidence linked to the extensive use of fossil fuels in our present energy system. Replacing the fossil fuels by alternative sources of energy poses a tremendous challenge for mankind, but is not at all undoable. LÄS MER

  4. 3. Novel methods for improving rapid paper-based protein assays with gold nanoparticle detection

    Författare :Lara Lama; Helene Andersson Svahn; Jesper Gantelius; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Gold nanoparticles; ultrasound energy; signal enhancement; diagnostics; microarrays; paper-based assays; COMSOL Multiphysics simulations; Bioteknologi; Biotechnology;

    Sammanfattning : This thesis describes methods for improving sensitivity in rapid singleplex and multiplex microarray assays. The assays utilize the optical characteristics of colloidal gold nanoparticles for the colorimetric detection of proteins.Multiplexed detection in sandwich immunoassays is limited by cross-reactivity between different detection antibodies. LÄS MER

  5. 4. Synthesis, Surface Modification, and Characterization of Metal Oxide Nanoparticles : Nanoprobes for Signal Enhancement in Biomedical Imaging

    Författare :Linnéa Selegård; Kajsa Uvdal; Pentti Tengvall; Linköpings universitet; []
    Nyckelord :;

    Sammanfattning : In this thesis we investigate crystalline metal oxide nanoparticles of our own design to obtain nanoprobes for signal enhancement and bioimaging purposes. We report fabrication, surface modification and characterization of nanoparticles based on zinc (Zn), and rare earths (i.e. gadolinium (Gd) and europium (Eu)) singly and in combination. LÄS MER

  7. 5. Metal Oxide Nanoparticles for Contrast Enhancement in Magnetic Resonance Imaging : Synthesis, Functionalization and Characterization

    Författare :Maria Ahrén; Kajsa Uvdal; Jan Kehr; Linköpings universitet; []
    Nyckelord :;

    Sammanfattning : This thesis work focuses on the design and production of nanoparticle based contrast agents for signal enhancement in magnetic resonance imaging (MRI). Three different synthesis routes are explored, primarily to produce crystalline gadolinium oxide (Gd2O3) nanoparticles, and surface modification is done to obtain stable, dispersible, biocompatible probes inducing high proton relaxivities. LÄS MER