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 42 for “"Fourier transform spectroscopy"”.
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Pulsed molecular beam cavity microwave Fourier transform spectroscopy of some fundamental van der Waals dimers and trimers
… using a pulsed molecular beam cavity microwave Fourier transform spectrometer. Ar-Cl₂ has been found to have a T-shaped geometry dominated by pairwise additive forces, in contrast to the previously studied linear complex Ar-ClF. An effective van der Waals bond distance has been obtained, as well …
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Non-destructive analysis of popular cigarette brands utilizing attenuated total reflectance (ATR) and diffuse reflectance infrared fourier transform spectroscopy (DRIFTS) and chemometrics
… that might make brand differentiation possible. Fourier Transform Infrared Spectroscopy (FTIR) is a traditionally nondestructive, common instrumental approach employed in forensic chemistry, and is often employed in forensic analysis of trace evidence. Due to its ability of analyzing different …
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Direct and quantitative broadband absorptance micro/nano spectroscopy using FTIR and bilayer cantilever probes
… spectra of micro/nano-sized structures using Fourier Transform Spectroscopy (FTS). The measurement technique combines optomechanical cantilever probes with a modulated broadband light source from an interferometer for spectroscopic measurements of objects. Previous studies have demonstrated …
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Structural and mechanistic identification of heterogeneous catalysts
… microscopy, diffuse reflectance infrared Fourier transform spectroscopy, X-ray photoelectron spectroscopy and X-ray absorption spectroscopy may be employed to identify the catalytically relevant properties (charge state, electronic structure, atomic configuration, bonding interaction). …
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Digital spectral analysis and adaptive processing techniques for phase modulated optical fiber sensors
… electromagnetic field. Research concentrated on Fourier transform spectroscopy as a means for capturing wavelength encoded information from the fiber sensor. Classical spectral analysis utilizing the Fourier transform as a mathematical foundation for relating a time or space signal to its …
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Plasma-Assisted Molecular Beam Epitaxial Growth of Indium Nitride for Future Device Fabrication
… response of InN films was performed using Fourier transform spectroscopy. Trends in the structural periodicity and optical response were found and are presented within.</p>
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Analysis and Comparison of the Photodecomposition Reaction of Methanol on CeO2 Impregnated TiO2 Surfaces Versus Bare TiO2 Surfaces
… monolayer samples. Diffuse Reflectance Infrared Fourier Transform Spectroscopy (DRIFTS) was used to characterize the surface chemistry occurring on these samples while a flow reactor was used to characterize the reaction products using a long path gas cell in a Fourier transform infrared …
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The Study of Zirconium Hydroxide and Zirconium (IV) Metal-Organic Frameworks as Reactive Substrates for the Decomposition of Chemical Warfare Agents
… 1) with the use of Diffuse Reflectance Infrared Fourier Transform Spectroscopy (DRIFTS) to examine the surface reaction between DMMP and the solid; and 2) using a flow reactor system that monitored gas phase reaction products produces by the surface reaction. The results show that …
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ADVANCING METHODS FOR APPORTIONING THE SOURCES OF SEDIMENT IN RIVERS: COMBINING SPECTROSCOPY AND STABLE ISOTOPES WITH BAYESIAN MIXING MODELS
… deficiencies, a combined X-ray fluorescence spectroscopy (XRFS) and diffuse reflectance infra-red Fourier transform spectroscopy (DRIFTS) approach is developed to rapidly, accurately and non-destructively analyse suspended particulate matter (SPM) geochemistry directly from sediment covered …
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Solubility and spectroscopy of unsaturated hydrocarbons in cryogenic solvents.
… is unknown. Thus, in this work, vibrational spectroscopy in the IR-NIR-Vis of small organic molecules such as benzene, ethene, 2-methyl-1,3-butadiene (isoprene), and formaldehyde dissolved in liquid ethane, rare gases, and nitrogen under Titan's conditions (low temperatures, and …
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Synthesis and Characterization of Novel Adsorbent Fibers
… analysis (EA), diffuse reflectance infrared fourier transform spectroscopy, thermal gravimetric analysis, and nitrogen/carbon dioxide adsorption. Their performance as efficient ion exchange systems was evaluated through pressure drop, capacity and dynamic mode kinetic measurements. Total ion …
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Landscape and environmental controls on soil organic matter decomposability in the High Arctic
… fraction analysis, diffuse reflectance infra-red Fourier transform spectroscopy (DRIFTS) and Near Edge X-ray Absorption Fine Structure (NEXAFS) spectroscopy to explore how variability in vegetation and soil moisture across the High Arctic landscape influences soil organic carbon (SOC). My results …
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NOVEL NANOFIBER-BASED GRAFT FOR HEART VALVE REPLACEMENT
… of blended composites was demonstrated using Fourier transform spectroscopy. Tensile stress, strain, and elastic modulus of the electrospun mats were measured by an Instron mechanical tester. The elastic moduli were between 2.3 - 5.0 Mpa, tensile stresses ranged from 0.8 to 1.5 Mpa, and …
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Thermo-analytical and spectroscopic characterisation of pore lining minerals in reservoir rocks.
… method employs Diffuse Reflectance Infrared Fourier Transform Spectroscopy (DRIFTS) to distinguish the constituent minerals of a reservoir rock using characteristic bands in their vibrational spectra. Spectra collected from reservoir rocks that have undergone various sample preparations have …
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Forensic Discrimination, Age Estimation, and Spectral Optimization For Trace Detection of Blood On Textile Substrates Using Infrared Spectroscopy and Chemometrics
… at crime scenes. Identifying these fluids using spectroscopy may replace existing presumptive chemical-based tests that have disadvantages (i.e., toxicity and sensitivity to light). The feasibility of remote spectroscopic detection to visualize blood on forensically relevant textiles was …
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IN-DEPTH STUDY OF THE RELATIONSHIP BETWEEN PROTEIN MOLECULAR STRUCTURE AND THE DIGESTIVE CHARACTERISTICS OF THE PROTEINS IN DRIED DISTILLERS GRAINS WITH SOLUBLES
… and corn blend DDGS) using Synchrotron Based Fourier Transform Infrared Microspectroscopy and Diffuse Reflectance Infrared Fourier Transform Spectroscopy and to reveal the relationship between protein molecular structure and protein digestive characteristics in DDGS in dairy cattle. Triticale …
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