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 18 of 18 for “"Optical signatures"”.
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Label-free optical signatures of extracellular vesicles and their applications in disease diagnosis and therapy response
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2027-05-01
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Optical Signatures of Bioavailable and Terrigenous Dissolved Organic Matter Across Long Island Sound and Hudson River Estuaries
<p>Optical measurements, from <em>in situ</em> to satellite-based sensors, provide a powerful framework for examining the sources, sinks, and transport pathways of dissolved organic matter (DOM) across the land–ocean aquatic continuum. By integrating observations across spatial and temporal scales, …
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Spectroscopic measurements and modeling of carbonaceous particle combustion in a shock tube
Carbonaceous nanoparticle (CNP) combustion shapes optical signatures and heat release in detonation-relevant multiphase flows, yet quantitative constraints on particle temperature, sublimation rates, reaction kinetics, and wavelength-dependent optical properties remain limited under short-duration, …
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Mechanistic studies of photo-induced proton-coupled electron transfer and oxygen atom transfer reactions in model systems
Time-resolved optical spectroscopy has been employed for mechanistic studies in model systems designed to undergo photo-induced proton-coupled electron transfer (PCET) and oxygen atom transfer (OAT) reactions, both of which are important to energy conversion chemistry (Chapter I). The effect of …
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Initial experience of intraoperative identification of parathyroid glands with elastic scattering spectroscopy
… (ESS) has the potential to differentiate optical signatures of the parathyroid gland from surrounding tissues in real-time. METHODS: ESS optical signatures were collected intraoperatively from perfused parathyroid, thyroid, fat, muscle, and nerve tissue during thyroidectomy. The ESS data …
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Spin-sensitive probes of triplet excitons in organic semiconductors
… of exchange coupling and identify specific optical signatures of exchange-coupled triplet pairs. Using high magnetic fields ($\leq\mbox{60 T}$) we isolate and measure the exchange coupling and optical signatures of multiple distinct triplet pairs in the same material. Finally, we probe the …
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Combustion dynamics of individual reactive material particles
… metal powders enabled one to record optical signatures for time-resolved combustion instances for 2-25 um diameter aluminum particles burning in different atmospheres. Individual particle diameters are interpreted and emission signatures are correlated to determine the burn times. The …
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Radio and optical studies of natural and artificially stimulated geospace plasmas
Results from radio and optical observations of natural and artificially enhanced geospace plasmas are presented. Firstly, naturally occurring plasma phenomena was studied by means of the radio and optical ground-based instruments and the results are compared with the in-situ satellite measurements. …
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Optical Tracking and Spectral Characterization of Cubesats for Operational Missions
… objects using a worldwide network of radar and optical sensors. However, in order to better protect space assets, there has been increased interest in not just knowing where a space object is, but what the object is. The optical and spectral characteristics of solar light reflected off of …
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Time-Domain Astrophysics with the Transiting Exoplanet Survey Satellite
… using the satellite to detect and characterize optical emission from gamma-ray bursts (GRBs). Chapter 2 focuses on the discovery of HD 135348, a "rigidly rotating magnetospheric" star–wherein the stellar magnetic field traps dust in a co-rotating orbit and leads to complex periodic photometric …
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Identification of Image-based Markers for Oral Pre-cancers and Cancers using in-vivo Multimodal Imaging
… and cancers for biopsy guidance. Nonlinear optical microscopy (NLOM) has shown potential to identify optical signatures associated with microstructural and biochemical alterations in cancer, providing in-vivo three-dimensional imaging with contrast from endogenous fluorophores, including …
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Functional Biological Spectroscopy and Multiphoton Imaging Using Endogenous Optical Contrast
Endogenous optical signatures of tissue provide information relevant to biological and biomedical questions through measurements of intracellular and extracellular endogenous contrast. To develop sensitive diagnostic methods using this contrast, the important individual endogenous constituents were …
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Coherent photons from a solid-state artificial atom
… The ability to address quantum dot spins optically allows us to initialise and manipulate the state of the quantum bit. Gaining information on the qubit, for example by reading out its state, not only requires state-selective optical excitation, but also access to the single photons …
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Ignition mechanism in nanocomposites thermites
… produced. Real time measurements of current and optical signatures produced by the ignited sample at different wavelengths are taken. The results are processed to determine the spark energy, minimum ignition energy, ignition delay, and other parameters. Shock ignition of nanocomposite 8Al-MoO_3 …
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Synthesis, surface modifications and biomedical applications of colloidal gold nanoparticles, towards controlled regulation of angiogenesis in conjunction with photo-thermal therapy
The unique optical properties of colloidal gold nanoparticles: high extinction coefficient and adjustable plasmon band, as well as their excellent biocompatibility (low toxicity and a natural affinity towards thiols and amines) make them very attractive materials for biomedical research. In this …
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Excitons in Two-Dimensional Materials: from Many-Body Physics to Quantum Technologies
… both technology and physics applications. Their optical signatures include the photoluminescence emission from the recombination of bound electron-hole pairs, or excitons. Their unique band structure gives rise to rich excitonic spectra where the excitons possess large binding energies in the …
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Nanostructures templated on biological scaffolds for light harvesting, energy transfer, charge transfer, and redox reactions
… lifetime of the excited states. Based on these optical signatures a hypothetical model is suggested to explain the energy transfer occurring in the supramolecular porphyrin structures templated on the virus. Second, through further genetic engineering of M13 viruses, iridium oxide hydrosol …