DISTANCE-DEPENDENCE OF PLASMON-MULTIEXCITON COUPLING BETWEEN CDSE QUANTUM DOTS AND GOLD NANOSTRUCTURES
1 online resource (80 pages) : PDF
University of North Carolina at Charlotte
Quantum confinement that semiconductors experience at the nanoscale facilitate the creation of multiexcitons. However, this same confinement also increases the efficiency of Auger recombination which result in low quantum yields from these states. The emission rates of quantum dots are known to be modified by the surface plasmon resonances of gold nanostructures. This plasmon-exciton interaction is thought to be a near-field interaction between the quantum dot excited state and the plasmon resonance of the metal, thus, indicating an interaction that is distance-dependant. A similar interaction is expected between the quantum dot multiexciton state and the plasmon resonance of the metal.In this work, the distance-dependence of the plasmon-multiexciton interaction was probed by use of modified substrates that controlled separation between gold nanoparticles and quantum dots through the use of bifunctional molecules, layer-by-layer deposition, and single molecule fluorescence techniques.
GOLDLAYER-BY-LAYERNANOPARTICLEPHOTON CORRELATIONPOLYELECTROLYTEQUANTUM DOT
Her, Tsing-HuaVivero-Escoto, JuanWalter, Michael
Thesis (M.S.)--University of North Carolina at Charlotte, 2015.
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