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 10 of 10 for “"excitonic coupling"”.
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Probing Exciton Dynamics in Metal–Organic Frameworks
… interactions that occur via resonant dipole coupling. Due to the angular sensitivity of these interactions, a paddlewheel pillared MOF structure effectively blocks parasitic singlet energy transfer from a pyrene donor to a porphyrin acceptor by anchoring their transition dipoles at 90° to …
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Supramolecular porphyrin arrays on DNA and SWNT scaffolds
… level to that of the rigid linked monomer. Excitonic coupling of the porphyrins is observed; the different monomers incorporated into DNA show different effects in the circular dichroism spectra, which may be explained through the increased conformational freedom of the ‘flexible’ linker. …
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DNA Directed Organic Semiconductor Interactions Controlling Excitons, Charge Transfer States, and Singlet Fission
… background to DNA assembly and interchromophore coupling, the synthesis of DNA-conjugated organic semiconductors are described. Semiconductors were inserted into the phosphodiester backbone of DNA, maintaining DNA’s self-assembling properties. The appended DNA direct the interactions between …
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Understanding and Controlling the Magnetic and Optical Properties in van der Waals Semiconductors
… In Chapter 2, we focus on exploring the magneto-excitonic coupling in a prototypical 2D vdW magnet CrSBr utilizing ab initio calculations.1 We uncover the anisotropic Wannier nature of the 2D excitons in few-layer CrSBr and the entanglement of excitons between vdW layers of this material. • In …
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Memory and fluctuations in chemical dynamics
… demonstrate that by decomposing the two-molecule excitonic coupling into interactions between one-molecule transition monopoles, a more accurate and less data-intensive machine learning scheme can be devised.
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Single-conformation spectroscopy of hydrogen bonding networks: Solvation, synthetic foldamers, and neurodegenerative diseases
… insight into solvent effects on vibronic and excitonic coupling, and can be used to further develop the models used to describe such processes.</p> <p>Similarly, single-conformation spectroscopy can reveal the effects of conformational flexibility on the innate conformational preferences and …
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Functional Molecular Spacers for Plasmonic Nanojunctions: Design, Synthesis and Self-Assembly
… electron density oscillations (and electrostatic coupling thereof) at the nanoparticle and nanojunction surfaces, which confine incident light to nanoscale volumes and boost the local electromagnetic field strength - a phenomenon known as plasmonic enhancement. This facilitates enhanced …
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Energy and information transfer via coherent exciton wave packets
… as a result. However, if the exciton-phonon coupling can be reduced, it may be possible to construct excitonic wave packets that offer a means of efficiently transmitting information and energy. This thesis is a combined theory/computation investigation to design condensed matter systems …
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Superradiant Emission from Delocalized Frenkel Excitons in Molecular J-Aggregates
Coherent coupling of excitations between chromophores in molecular J-aggregates leads to delocalized Frenkel excitons that span multiple molecules in the aggregate. Delocalized Frenkel excitons in molecular J-aggregates provide an avenue to access high-speed fluorescent materials with unique …
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Temperature-Dependent Supramolecular Remodeling of Poly-Ether Perylene Diimides
Within the past decade, perylene diimides (PDIs) have been regarded as a class of the most investigated organic dyes, particularly studied for their photophysical and supramolecular properties. The high versatility of PDIs enables a wide ranged use in practical applications from organic …