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Nanoscience and Nanotechnology Commons

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Plasmonics

2015

Publicly Accessible Penn Dissertations

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Optical And Electronic Interactions At The Nanoscale, Michael Edward Turk Jan 2015

Optical And Electronic Interactions At The Nanoscale, Michael Edward Turk

Publicly Accessible Penn Dissertations

In this dissertation, we discuss optical and electronic interactions in three nanometer scale semiconductor systems in a broadly defined sense. These studies are performed using time-integrated and time-resolved optical spectroscopies and temperature- and field-dependent electrical transport measurements. We first discuss the construction and optimization of an optical apparatus for performing broadband, time-integrated and sub-picosecond fluorescence and absorption measurements. Using this apparatus, we then characterize the impact on the optically-excited carrier relaxation dynamics of cadmium selenide quantum dots due to a surface treatment previously shown to increase interparticle coupling, namely the solution exchange of native, aliphatic ligands for thiocyanate followed by ...