Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 9 of 9 for “"Energy Transfer Dynamics"”.
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Resonant Dipole-Dipole Energy Transfer Dynamics in a Frozen Rydberg Gas
… Rydberg atoms, and is the dominant mechanism for energy exchange among such atoms on microsecond time scales. I present the results of experiments that investigate this interaction using rubidium atoms excited to Rydberg states with an all-diode laser system. In the first of these, high resolution …
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Exciton and Energy Transfer Dynamics in Hybrid Perovskite and Lanthanide Nanomaterials
… importance because they are usually the lowest-energy states and they show long lifetimes and diffusion lengths. However, triplet excitons are dark states. This makes harvesting triplet energy for optoelectronic applications difficult. This thesis focuses on fundamental study on: 1) …
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Ultrafast Charge and Energy transfer Dynamics in Organic-Transition Metal Dichalcogenides Heterostructures
… optoelectronic devices. Afterwards the ultrafast energy, charge transfer and spin-valley physics of Organic-TMD Heterostructures, namely Pentacene/MoTe2 and Pentacene/WSe2 were examined. It was found that excitation at the electronic gap of MoTe2 leads to a Type II to type I band alignment cross …
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Energy Transfer Dynamics in Collisions of Polar and Non-polar Gases with Functionalized Self-Assembled Monolayers
… of freedom of the impinging gas, and potential energy surface well depths have been explored as a way to predict the outcome of a gas-surface collision. Ne is used to assess the mechanical rigidity of the SAMs. The order of rigidity is CH3 < NH2 ~ OH. The NH2 and OH terminated SAMs are more …
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Theoretical and experimental studies of energy transfer dynamics in collisions of atomic and molecular species with model organic surfaces
A full understanding of chemical reaction dynamics at the gas/organic-surface interface requires knowledge of energy-transfer processes that happen during the initial gas/surface collision. We have examined the influence of mass and rovibrational motion on the energy-transfer dynamics of gas-phase …
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Understanding Ultrafast Energy Transfer across the Photosynthetic Membrane of Purple Bacteria with Near-Native Systems
… to capture sunlight and convert it to chemical energy through charge separation with almost 100% quantum efficiency. This remarkable efficiency is due to the arrangement of their pigments into pigment-protein complexes that are further arranged into a larger antenna network within the membrane …
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Investigation of Gas-Surface Dynamics Using an Ar Atomic Beam and Functionalized Self-Assembled Monolayers
… nature of the surface interface influences energy transfer dynamics in gas-surface collisions. An atomic beam is used to probe the energy transfer dynamics in collisions of Argon with model surfaces of functionalized self-assembled monolayers (SAMs) (1-dodecanethiol and …
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Dynamics of molecular adsorbates exposed to ultrafast thermal gradients
Energy transfer concerned with how thermal energy is transported at molecular-length scales is a relatively new area and the physics governing this process are not yet well established. The experiments presented here represent initial steps toward developing a better understanding how thermal …
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Studying Ultrafast Vibrational dynamics of Intramolecular Hydrogen Bonds using Broadband Infrared Pump-Probe Spectroscopy.
… an important role also in biological electron transfer across long distances. The vibrational dynamics of intramolecular hydrogen bonds pose experimental and theoretical challenges due to anharmonic couplings between the high frequency hydrogen bond stretching (νOH) mode and low frequency …