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 20 of 94 for “"Near-IR"”.
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Cd3P2 Quantum Dots As Sources for Quantum Emission and Detection of Near-IR Radiation
… on quantum dots (QDs) has grown due to their tunable emission and absorbance over a wide range of radiation. However, literature has prioritized researching QDs with band gaps in the visible region as a result of both instrumentation and synthetic challenges. The near-IR region is of …
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Strain-balanced silicon-germanium materials for near IR photodetection in silicon-based optical interconnects
… high quality compositionally graded buffers, or virtual substrates. make a complete range of alloy composition and biaxial strain combinations accessible. This structure is a unique way to achieve high quantum efficiency near IR photodetection for silicon-based optical interconnects. The growth of …
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Near-IR Spectroscopic Analysis of the Primary Volatile Composition of Long and Short-Period Comets
… system. Multiple primary volatiles (molecules directly sublimating into the coma from the nucleus) emit via rovibrational transitions in the near-IR, providing opportunities to calculate their abundances. To date, only ∼50 comets have been characterized for their primary volatiles, with the …
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Fundamental Properties of Galaxy Clusters: A Prelude to Large Scale Sunyaev-Zel'dovich Effect/near-Ir Cluster Surveys
… the dissertation is a systematic survey of the near-IR properties of cluster galaxies. With a large nearby cluster sample that spans a wide range in mass, we study scaling relations between the total galaxy luminosity or number and the cluster binding mass. The origins of such correlations are …
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A near-infrared filter system and study of solar umbral dots at 1.6 µm
… a new filter system (magnetograph) working in near-IR wavelength has been developed in this work. This system includes an interference prefilter (FWHM - 40 [Angstrom]), a liquid crystal magnetic analyzer, a near-IR bireffingent filter (FWHM - 2.5 [Angstrom]), a near-IR Fabry-Perot filter (FWHM …
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Near-Infrared Analysis and Process Control of Pharmaceutical Pelletization Processes
This study explored the potential of near-infrared spectroscopy in the determination of pharmaceutical pellet characteristics and to predict desired process endpoints during fluidized bed drug suspension layering and coating operations. Various strengths of diltiazem HCl pellets were prepared via a …
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Synthesis of heteroaromatic ruthenium dyes for use as electron reservoirs in dye-sensitized solar cells
… the efficiency of modern solar cells. The near-IR region of the solar spectrum is often underutilized as a means of energy production, as the photons in this region do not contain enough energy to promote electrons to the conducting band of common semiconductors used in photovoltaics. To …
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Charge-coupled device optimizations for astronomy.
… imaging detector of choice for the visible and near-IR spectral regions. There are, however, several problems which have greatly reduced the availability of sufficient quality CCDs to the astronomical community. These include the low blue and ultraviolet quantum efficiency of thick devices, the …
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Synthesis, Characterization, and Evaluation of Novel BODIPY Dyes With Theranostic Applications
… much attention in recent decades due to their enticing photophysical properties and their bioimaging applicability. Despite the progression of this field, the development of BODIPY based anti-cancer agents and radioimaging dyes has seen little progress. The utilization of fluorescent BODIPYs …
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Advances In The Opto-mechanical Design And Alignment Of The Hehsi Imaging Spectrometer Based On A Sagnac Interferometer
… 400 to 1000 nanometers in the visible and very near IR as well as 900 to 1700nm in the Near IR. Creation and use of a real time feedback alignment utility allow quantifiable signal comparison and image alignment. Advances allow for HEHSI to remain aligned during data collection sessions and …
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Controlled multi-step purification of single-walled carbon nanotubes
… purification method has been developed to remove iron impurity and non-nanotube carbon materials from raw single-walled carbon nanotubes produced in the HiPco (high pressure CO) process. In this study, iron nanoparticles, coated by carbon, are exposed and oxidized by multiple step oxidation at …
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Modeling and Simulation of Optical Properties of Noble Metals Triangular Nanoprisms
… in a gamut of disciplines such as energy and environmental protection to name a few. Surface plasmon resonance (SPR) properties of the gold and silver are size and shape dependent. Of the various shapes reported in literature, triangular nanoprisms has tunable optical properties in the visible …
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Nanostructured Materials Prepared With Ultrasound
… route is further extended to prepare far-red and near-IR emitting ternary quantum dots.
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Synthesis of Fluorescent Molecules and their Applications as Viscosity Sensors, Metal Ion Indicators, and Near-Infrared Probes
… is the development of novel fluorescent near-infrared molecules for various applications. In Chapter 1, a compound dU-BZ synthesized via Sonogashira coupling reaction methodology is described. A deoxyuridine building block was introduced to enhance hydrophilic properties and reduce …
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Synthetic Routes to Therapeutic Agents Via Masked Functionalities: From Orthogonal Peptide Crosslink to Photothermal Cancer Prodrug
… are a family of compounds distinguished by their crosslinking ô-histidinoalanine (ô-HAL) residue. Part one of this dissertation details the synthesis of an orthogonally protected ô-HAL building block that will be incorporated into a total synthesis of theonellamide C. Selective deprotection of …
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Ar-Xe plasma laser and microplasma propagation
The thesis consists of two parts. In the first part, we report on the development of Ar-Xe plasma in a SU-8 based microchannel structure which is suitable for on-chip gain medium for near-IR lasing at 823 nm wavelength. SU-8 microchannels with length varying from 1 cm to 5 cm and cross-section area …
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Simulations and technology development for time-domain astronomy : TESS and InGaAs detectors
… with the transit technique, allowing the first statistical analyses of the exoplanet population. The upcoming Transiting Exoplanet Survey Satellite (TESS) mission will complement Kepler by identifying the brightest transiting exoplanet systems on the sky. These planets will offer the most …
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Superconducting nanowire single-photon detectors on aluminum nitride photonic integrated circuits
… increasingly important. The superconducting nanowire single-photon detector (SNSPD) is the leading single-photon counting technology for quantum information processing. Among various waveguide materials, aluminum nitride (AlN) is a promising candidate because of its exceptionally wide bandgap, and …
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Long wave infrared structured light
… smoke is present. While light in the visible and near IR spectrum are heavily affected by by common scattering mediums, long-wave infrared (also known as thermal IR) experiences less scattering, especially when scattering particles are small. This thesis proposes and demonstrates a structured …
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Dust disks around hot white dwarfs and central stars of planetary nebulae
… small dust disks within the Roche limits of their WDs, and a large dust disk around the hot central WD of the Helix planetary nebula (PN), possibly produced by collisions among Kuiper Belt-like objects.To search for more dust disks of the latter type, we have carried out a Spitzer MIPS 24 um …
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