Sökning: "fluorescence blinking"
Visar resultat 1 - 5 av 11 avhandlingar innehållade orden fluorescence blinking.
1. Fluorescence Properties of Quantum Dots and Their Utilization in Bioimaging
Sammanfattning : Quantum dots (QDs), especially colloidal semiconductor QDs, possess properties including high quantum yields, narrow fluorescence spectra, broad absorption and excellent photostability, making them extremely powerful in bioimaging. In this thesis, we studied the fluorescence properties of QDs and attempted multiple ways to boost applications of QDs in bioimaging field. LÄS MER
2. Single-molecule spectroscopy of π-conjugated polymers
Sammanfattning : When applied to condensed-matter samples of large organic molecules, optical spectroscopy faces the problem of inhomogeneous broadening caused by the diversity of environments and conformations that sample molecules are subjected to. This severely limits the information that can be extracted from optical spectra. LÄS MER
3. Light polarization in single molecule spectroscopy: From visualization of structural anisotropy and energy transfer to super-resolution imaging with orientational contrast
Sammanfattning : Π-conjugated polymers are an important class of materials which can be used in e.g. photoelectric (solar cells) or electroluminescent (displays) devices. These materials are implemented in a number of applications these days since a lot is already known about them. LÄS MER
4. Lightguiding of Fluorescence in Nanowires : Principles, Optimization and Implementation for Biosensing
Sammanfattning : Due to their unique optical properties, III-V nanowires are promising candidates for the development of efficient solar cells, LEDs and nanoscaled lasers. The interaction of nanowires with fluorescent molecules is also of interest, as these nanostructures can act as nanoscaled optical fibers. LÄS MER
5. Advanced fluorescence-based fluctuation methods for biosensing
Sammanfattning : In addition to use traditional fluorescence parameters for biological studies,the main focus of this thesis is on the monitoring of photoinduced fluorophoretransient states. These dark states, such as the triplet state, redox states andphotoisomers that are formed upon excitation, are long-lived in comparisonto the fluorescent singlet state and therefor more sensitive to the surroundingenvironment and their sensitivity are to biological relevant conditions. LÄS MER