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 7 of 7 for “"femtosecond transient absorption"”.
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Femtosecond Time-Resolved Laser Spectroscopic Studies on the Electron Dynamics in Heterostructured Nanomaterials
… property for photovoltaic applications. Femtosecond laser spectroscopy has been used to investigate charge transfer dynamics with a time resolution of 100 fs and better. Using femtosecond transient absorption and time-resolved photoluminescence spectroscopy, we have studied the electron …
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DIRECT REAL-TIME REAL-SPACE IMAGING OF ENERGY TRANSPORT IN ORGANIC SEMI-CONDUCTORS
… the movement of photo-excited species after the absorption of a photon in organic materials and across interfaces. In this thesis, we explore the energy transport and charge separation dynamics in two systems: a nanotubular J-aggregate formed from the self-assembly of molecular pseudoisocyanine …
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Excitons in Self-Assembled Hybrid Systems of Molecular Aggregate Light-Harvesting Nanotubes: Charge-Transfer Substrates and Solution-Stabilized Nanocomposites
… re-assembly of aggregates. Analysis of the absorption spectrum of a model molecular aggregate system-light-harvesting nanotubes (LHNTs) of cyanine dye derivative C8S3-revealed the supramolecular structure is inherently unstable under mild changes to native solvent environment, only retaining …
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Light Harvesting and Energy Transfer in Metal-Organic Frameworks
… to their larger surface areas, MOFs have large absorption cross sections, which amplifies the rate of photon collection. Furthermore, MOFs can be constructed using analogues of chlorophyll and carotenoids that can participate in long-range energy transfer. Herein, we aimed to design photoactive …
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Investigating New Guaiazulenes and Diketopyrropyrroles for Photonic Applications
… analogs under acidic conditions, including absorption, emission, quantum yield, and optical band gap patterns. These results were exploited in the design of a photosensitive polymeric system with potential application in the field of three dimensional (3D) optical data storage (ODS). Chapter …
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Optical properties and thermal conductivity of resistive Au nanogranular films
… linear optical properties were observed using femtosecond transient absorption spectroscopy (fTAS) and their film morphology was explored with atomic force microscopy. The switch activation mechanisms that transformed the nanogranular Au film into a resistively switchable one, clearly …