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 958 for “"Raman spectroscopy"”.
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Applications of Raman spectroscopy.
Thesis. 1977. M.S.--Massachusetts Institute of Technology. Dept. of Biology.
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Forensic applications of raman spectroscopy
The forensic applications of Raman spectroscopy have been explored and extended using the development of novel sampling techniques and task-specific instrumentation described in this thesis. The phenomenon of Raman scattering, enhanced Raman scattering and their relevance in forensic investigations …
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Advanced Raman spectroscopy for bioprocess monitoring
The Raman -effect was discovered almost 90 years ago. It took a long time until the importance of Raman spectroscopy was fully understood and accepted for process industrial applications. Still today the usage is limited to a small application area. During the last decades advances in the …
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Application of raman spectroscopy in pharmaceuticals
Experimental research on the use of Raman spectroscopy as an in- and on-line sensing tool and a complementary characterization technique for pharmaceutical applications is presented in this thesis. In the first chapter following a broad overview, the use of Raman spectroscopy, together with x-ray …
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Enhanced Raman spectroscopy at dielectric interfaces
… of sampling structure for performing enhanced Raman scattering is presented here. These structures typically consist of 50 A of SiO$\sb2$ sputtered on Ag or Au island films, all coated on a lithographically defined opening in a masked SiO$\sb2$ substrate and use internal reflection in the …
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Raman spectroscopy of metallic carbon nanotubes
… study of the inelastic light scattering (Raman) spectrum of individual metallic carbon nanotubes, with a focus on the influence of electronic excitations and charged carriers. We have demonstrated that the frequency and linewidth of certain phonon modes of metallic carbon nanotubes depend …
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Development of an intracoronary Raman spectroscopy
… and morphological and chemical composition. Raman spectroscopy, based on spectral analysis of inelastically scattered photons, is a nondestructive technique that yields detailed information about the chemical composition of the sample being interrogated. Intracoronary Raman spectroscopy can …
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Online Raman spectroscopy for bioprocess monitoring
… growth medium via a remote fiber-optic Raman spectroscopy probe was studied in depth. The system was characterized to determine sources of instability and systematic error. A complete first-order error analysis was conducted to determine the theoretical sensitivity of the instrument. A …
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Tailored Materials for Surface-Enhanced Raman Spectroscopy
Surface-enhanced Raman spectroscopy (SERS) is a useful analytical tool that has grown in popularity since its discovery 40 years ago. Presently, a large number of materials are used as SERS substrates, including thiol-functionalised nanoparticles which form a large class of SERS-active materials as …
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Raman spectroscopy of layered cultural heritage materials
“Raman Spectroscopy of Layered Cultural Heritage Materials” is a dedicated PhD thesis on Raman spectroscopy and its applications with a special focus on the non-invasive and non‑destructive analysis of layered structures in works of art. It combines the concepts of direct and stratigraphic …
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Coherent anti-Stokes Raman spectroscopy of diamond
… performed to investigate Coherent Anti-Stokes Raman Scattering (CARS) in diamond. Aspects of this type of non-linear scattering are presented theoretically, and various experimental configurations were attempted in order to study them. These included the dependence of the CARS signal intensity …
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Using Raman spectroscopy to study supercritical CO₂
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1999.
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Raman spectroscopy of single wall carbon nanotubes
… this thesis work are to design and construct a Raman instrument capable of obtaining signals from many different types of individual SWNTs, to develop methods and tools to collect, organize and analyze large amounts of Raman spectra from them, to use resonant Raman spectroscopy to characterize …
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Transcutaneous measurement of glucose using Raman spectroscopy
… We have used the advantages provided by NIR Raman spectroscopy, i.e. sharp and distinct spectral features combined with a large probe volume, in order to simultaneously quantify multiple analytes (glucose, urea, cholesterol, triglycerides, total protein, albumin, hemoglobin, hematocrit (hct)) …
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Surface-Enhanced Raman Spectroscopy Enabled Microbial Sensing
… and long turnaround times. Surface-enhanced Raman spectroscopy (SERS)-based techniques have been proposed to overcome these limitations. In this dissertation, we discuss work conducted to develop novel SERS-based methods to enable both sensitive microbial quantification and analysis of the …
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Multivariate Statistical Methods that Enable Fast Raman Spectroscopy
<p>Raman spectroscopy is a useful tool in investigating inter- and intra-molecular interactions as well as classifying and quantifying chemical species in a sample. Many materials of societal interest, such as proteins and pharmaceuticals, have distinctive Raman spectra with sharp features. …
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Plasmonic Au nanostructures for surface-enhanced raman spectroscopy
Raman spectroscopy is a spectroscopic technique that provides rich structural information for identifying chemical species but finds limited applications owing to its low sensitivity. Surface-enhanced Raman spectroscopy (SERS) is capable of solving the issue of sensitivity by enormously amplifying …
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