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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 341 for “"Fourier transform infrared spectroscopy"”.
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Fourier Transform Infrared Spectroscopy for the measurement of GeSn/(Si)GeSn
… in the optoelectronics industry, high-resolution spectroscopy with high SNR are necessary to accurately determine the unknowns in the GeSn growth conditions, device fabrication, and material development. In this work, PL and EL characterization systems were designed, built, and aligned using a …
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In-situ Fourier transform infrared spectroscopy of chemistry and growth in chemical vapor deposition
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1995.
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Real time in-situ monitoring and control of silicon epitaxy by Fourier transform infrared spectroscopy
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1994.
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Identification of changes in the surface of textiles subjected to plasma chemical treatment using attenuated total reflectance-fourier transform infrared spectroscopy
… of the treated samples. Therefore, we have used Fourier transform infrared spectroscopy with attenuated total reflectance sampling (ATR-FTIR) to examine changes in the chemical nature of the surface of representative modern and archaeological samples upon plasma treatment. Samples that were …
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Gas chromatography/Fourier transform infrared spectroscopy/mass spectrometry for environmental analysis: A quick turnaround method for the analysis of polycyclic aromatic hydrocarbons
… quantitative capabilities of a gas chromatograph/Fourier transform infrared spectrometer/mass spectrometer were investigated. Three methods of quantitation using FT-IR were examined. These methods were: the Gram-Schmidt method, maximum absorbance method and the integrated absorbance method. The …
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Revealing SEI Formation and Evolution at the Li Anode/Liquid Electrolyte Interface in Li-ion Batteries by in situ Fourier Transform Infrared Spectroscopy
A novel in-situ FTIR method is developed to probe the Li anode/liquid electrolyte interface. Three different conventional electrolyte systems were tested: 1.2 M LiPF₆ in EC, 1.0 M LiPF₆ in EMC, and LP57 (1.0 M LiPF₆ in EC:EMC (3/7 vol %)). Using the spectroelectrochemical cell, FTIR measurements …
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Understanding the pathway and mechanism of electrolyte decomposition on metal oxide surfaces in Li-ion batteries by in situ Fourier Transform Infrared Spectroscopy
… surfaces. In this study, we developed an in situ Fourier Transform infrared spectroscopy (FTIR) method to investigate the (electro)chemical reactions at the interface between the electrolyte and composite positive electrode surface during charging. While ethyl methyl carbonate (EMC) and ethylene …
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Valorization of banana peels to obtain a bioplastic from acetylated starch
… are banana peels, which can be valorized to be transformed into bioplastic. The objective of this research is to develop a bioplastic film on a laboratory scale, from the starch extracted from banana peels using the acetylation method. To evaluate the quality of the bioplastic, six tests were …
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Structure and dynamics of adsorbed polymer
… adsorption-desorption kinetics were made using Fourier transform infrared spectroscopy in the mode of attenuated total reflection. The polymers were amorphous, linear and flexible.
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The identification and characterization of genomic bacterial DNA utilizing vibrational spectroscopy
"Fourier Transform Infrared Spectroscopy (FTIR) and its complementary technique Raman Spectroscopy were used to study dried films of pure intact genomic Deoxyribonucleic Acids (DNA) from two species of Bacillus bacteria complexed with Tris(hydroxmethyl)aminomethane (Tris) and …
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Implications of Diversity: A Study of the Evolution of the Adsorption States of Macromolecules at Surfaces
… and adsorption-desorption kinetics made using Fourier transform infrared spectroscopy in the mode of attenuated total reflectance. The macromolecular systems studied were intentionally varied with regard to chemical composition, surface affinity, flexibility, and solvent quality and …
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FTIR studies of environmental effects on carbonmonoxymyoglobin
In this thesis, Fourier Transform Infrared Spectroscopy (FTIR) was used to study the interaction between the protein myoglobin (Mb), and substrate carbon-monoxide (CO), as a model system of control in protein-ligand systems. IR spectra of the CO molecule bound to Mb have been obtained as a function …
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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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In Situ Studies of Promoted Catalytic Surfaces and Redox Active Mineral Surfaces
… in situ technique, attenuated total reflection-Fourier transform infrared spectroscopy, will be utilized to probe reaction chemistry on two sets of surfaces; the first, a silicon-copper alloy surface where copper acts as a catalyst in the synthesis of methylchlorosilanes, and the second, a redox …
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Test Development and Material Characterization of Hot Poured Crack Sealant at Low Temperature
… (ESEM), gel-permeation chromatography (GPC), Fourier-transform infrared spectroscopy (FTIR), and thermo-gravimetric analysis (TGA). These techniques reveal the composition of sealant as well as the interaction between the components and are used to assist the understanding of various sealant …
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The Role of Carbonaceous Materials in Pavement Dust, Soils, and Lake Sediments on the Fate of Organic Pollutants in Small Urban Watersheds
… were characterized with elemental analysis, Fourier transform infrared spectroscopy, specific surface area measurement, and solid state 13C nuclear magnetic resonance spectroscopy. Sorption isotherms of phenanthrene to these fractions and bulk samples fitted with Freundlich models are nearly …
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Carbon Dioxide Capture With Amine Functionlized Graphene Oxide
… graphene oxide has been analyzed with fourier transform infrared spectroscopy (ftir) for chemical structure. Thermal gravimetric analysis (tga) was used to test co2 capture capacity. Functionalized graphene oxide that has been purified with 30 washes via centrifuge with 72 hour amine …
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Highly doped semiconductors for plasmonic waveguides and flat-composite gratings
… for plasmonic waveguides and gratings in the mid-infrared. The potential applications of plasmonics to the MIR are reviewed, along with a brief derivation of a mathematical formalism for hybrid plasmonic waveguides which utilize both doped semiconductors and noble metals. A COMSOL Multiphysics …
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Dynamic aspects of adsorbed polymer layers: Evidence of glass-like transitions
… mg/mL) were made as a function of time using Fourier transform infrared spectroscopy in the mode of attenuated total reflection. The general experimental approach involved surrounding an initially adsorbed polymer layer with a solution of macromolecules having a greater affinity for the …
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The structure of cyclic fatty acid monomers isolated from heated linseed oil and their effects on cultured aortic endothelial cells
… using gas chromatography-matrix isolation-Fourier transform infrared spectroscopy and gas chromatography-mass spectrometry. The CFAM were identified as 18-carbon diunsaturated structures containing cyclopentenyl and cyclohexenyl rings in various positions along the molecule. One site of cis …
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