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 14 of 14 for “"infrared absorption spectroscopy"”.
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Fourier-transformed infrared absorption spectroscopy and kinetics studies of Gas phase small molecules
… gas-phase reactions using laser (lamp) based infrared techniques. The small molecules are very important in the atmospheric or combustion chemistry. We studied four types of reactions. The first one is the reactions of CSe2, SCSe and OCSe with O(3P) atom. The rate coefficients have been …
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Rapid scanning longwave infrared absorption spectroscopy of chemical nerve agent simulant destruction in fireballs
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2023-04-12 without embargo terms
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An experimental study of proton-exchanged lithium niobate optical waveguides
… optical waveguide prism-coupler measurements, infrared absorption spectroscopy, and atomic absorption spectroscopy. Chapter 3 is concerned with the problem of waveguide mode-index stability. Using a hydrogen isotopic-exchange reaction, the extent of which is obsrved via infrared absorption …
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A spectroscopic system for near infrared glucose measurement
… In this thesis, the use of the near infrared absorption spectroscopy is proposed and investigated. The light radiation is envisioned to be transmitted through thin tissue such as the webbing tissue between the thumb and the index finger. The main technical difficulties are identified …
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Bioconjugation of aminated DNA as a method of rapid polymer library generation for Corona Phase Molecular Recognition
… Through the methods of ultraviolet-visibile-near infrared absorption spectroscopy, near infrared fluorescence spectroscopy, and high-performance liquid chromatography characterization and structural analysis were performed. The results showed the successful conjugation of the small molecules to …
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Developing Time-Resolved Synchrotron Infrared Spectroscopy for Spectroelectrochemical Measurements
… platforms utilizing synchrotron infrared radiation (SIR) and time-resolved FTIR to study the kinetics of electrochemical reactions on second to millisecond scale with high chemical sensitivity. It will cover development of spectroelectrochemical cells and procedures compatible …
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Surface-Enhanced Spectroelectrochemistry using Synchrotron Infrared Radiation
… Sampling the ESI requires a surface-sensitive spectroscopy capable of addressing a buried interface, placing strong limitations on photon energy and spectroelectrochemical cell design. Furthermore, dynamic measurements are fundamentally limited by the finite rise time of the electrode. For many …
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Controlling kinetic branching in C0₂-to-fuels catalysis
… temperature-dependent in-situ surface-enhanced infrared absorption spectroscopy, establishing a mechanistic basis for potential-dependent CO binding. On Au surfaces, we observe that reversible linearly-bonded CO electrosorption is a water substitution process, where bound CO species readily …
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Study of Dynamics on the Interfaces of Carbon-Based Nanomaterials and Nanobiosensor
… to current detection techniques, such as infrared absorption spectroscopy (IR) and transmission electron microscopy (TEM). They are either not appropriate for detecting materials in aqueous environments or lack of ability to resolve dynamics at the interface with a sufficient temporal …
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Revealing Interfacial Reactions and Charge Transfer Kinetics in Electrochemical Energy Storage and Conversion
… interfaces. First, an in situ Fourier-transform infrared spectroscopy (FT-IR) method was developed to examine the parasitic reactions between carbonate electrolytes and lithium nickel, manganese and cobalt oxides (NMC) in Li-ion batteries, and unique evidence for dehydrogenation reactions on …
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Two-dimensional infrared spectroscopy of nucleic acids : application to tautomerism and DNA aptamer unfolding dynamics
… thesis was to develop and apply two-dimensional infrared spectroscopy (2D IR) as a new experimental tool to investigate nucleic acid dynamics. Infrared spectroscopy is sensitive to structural changes of nucleic acids and 2D IR offers sub-picosecond time resolution. 2D IR spectroscopy is …
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Development of a quantum cascade laser based spectrometer for high-resolution spectroscopy of gas phase C60
… cold, gas-phase spectrum of an infrared band of C60 around 8.5 μm. A high-resolution spectrum will be valuable from an applied astronomy and fundamental spectroscopy perspective. While there have been astronomical detections of C60 emission from thermal emission or UV-excitation, …
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Engineered Plasmonic Nanostructures for Infrared Spectroscopy, Refractive Index Sensing and Nonlinear Optics
… for enhancing the sensitivity of vibrational spectroscopy. The near-field enhancement is also responsible for benefiting device properties, such as improving nonlinear frequency conversion efficiency. In this thesis, I will present plasmonic structures with interesting optical properties and …
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Synthesis and kinetic processes in designed polymers
… MEMS design. Nanoantenna-based surface-enhanced infrared absorption is a powerful platform for the detection of biological and chemical species due to its ability to strongly enhance infrared absorption of a relatively narrow band of vibrational modes. However, SEIRA only detects molecules within …