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 20 for “"micro Raman spectroscopy"”.
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Multiphysics characterization of GaN HEMTs via micro-Raman spectroscopy
Microelectronic devices based on solid-state transistor technology are a key innovation that have transformed modern society and affected many aspects of our daily lives. As we continue to increase the density and functionality of transistors, progress is limited by the intrinsic material …
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Theory and applications of confocal micro-Raman spectroscopy on hybrid polymer coatings and PDMS membranes and spectroscopic studies of doped B2O3-Bi2O3 glass systems
… a theoretical-experimental study of confocal micro-Raman spectroscopy on hybrid polymer coatings and an application of this spectroscopic method on PDMS-membranes. The theoretical-experimental study includes the application of a model that describes the influence of the refraction effect on …
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THERMAL CONDUCTIVITY OF THIN FILM NIOBIUM DISELENIDE FROM TEMPERATURE-DEPENDENT RAMAN
… by nondestructive opto-thermo method utilizing micro-Raman spectroscopy. The thermal conductivity k=15(+4/-4) W/mK was obtained at room temperature and we further verified by hall measurements that (NbSe2) conducts heat mostly through electrons. The results shed lights on the potential of …
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Characterizing growth conditions in chlorine-activated diamond chemical vapor deposition
… large areas of continuous diamond film. Spatial micro-Raman spectroscopy analysis indicates a large difference in diamond quality depending on the operating conditions used. Experiments indicate a much smaller operating region for diamond growth than obtained using a previous design by Pan et al. …
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Nanostructure Characterization, Fabrication and Devices of 2D Mos2 and Mos2/WS2 Hetrostructures
… grown MoS2 is deeply investigated optically by micro-photoluminescence and micro-Raman spectroscopy. Topography and morphology are characterized by scanning electron and atomic force microscopy. The applications of as grown MoS2 monolayers have been studied by the fabrication of large area …
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Effect of Delayed Polymerization Time and Bracket Manipulation on Orthodontic Bracket Bonding
… shear bond strength testing followed by micro-Raman spectroscopy analysis to measure the degree of conversion of the resin composite. Results demonstrated the shear bond strength and the degree of conversion of ceramic brackets did not vary over time. However, with stainless steel …
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Chemical vapor deposition thin films as biopassivation coatings and directly patternable dielectrics
… was observed in HFCVD organosilicon films using Micro-Raman spectroscopy. A direct dielectric patterning process was proposed for semiconductor manufacturing. In this process, a dielectric material is patterned directly and developed without the need for a sacrificial photoresist layer. HFCVD …
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INTEGRATED AND MULTI-SCALE CHARACTERISATION OF GEM MATERIALS LACKING LONG-RANGE ORDER. THE CASE STUDIES OF CHRYSOCOLLA AND ANDEAN BLUE OPAL
… X-ray Total Scattering and transmission electron microscopy (TEM). Given the spatial heterogeneity of the samples, spot analyses at the micrometric scale were also adopted, including micro-Raman spectroscopy and electron microprobe analysis in wavelength-dispersive mode (EMPA-WDS) (using a …
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The interplay of structure and optical properties in individual semiconducting nanostructures
… AlGaAs nanowires were investigated by resonant micro-Raman spectroscopy near their direct bandgaps. The one-dimensional nanowire architecture was found to affect exciton lifetimes through an increase in surface state population relative to volume, resulting in Fröhlich coupling strengths …
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Polymeric nitrogen by plasma enhanced chemical vapor deposition
… of the samples produced were conducted using micro-Raman spectroscopy, attenuated total reflectance-Fourier transform infrared spectroscopy, powder X-ray diffraction, and temperature programmed desorption. Sample morphologies and compositions have also been performed using scanning electron …
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Beam profile characterization of light-emitting-diode curing units and its effect on polymerization of a resin-matrix composite
… A mapping approach was used to investigate DC, microhardness and cross-link density (CLD) within 5×5×2 mm specimens at various depths; top, 0.5, 0.7, 0.9, 1.1, 1.3,1.5 mm and bottom. The localized irradiance correlation with its corresponding DC, microhardness and CLD was explored, and localized …
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In-vitro assessment of modified resin adhesive-tooth interfaces
… activity and substrate zymography, respectively. Micro-tensile bond strength and micro-permeability were used to evaluate the modified adhesives’ physical properties. Micro-Raman spectroscopy analysis was validated on carious dentine and it was used to evaluate the interface between the modified …
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Raman Spectroscopy - in situ Characterization of Growth and Surface Processes
… of this thesis is to expand on the usefulness of Raman spectroscopy as an in situ probe to aid in the growth and implementation of electronic, optical, and biodetection materials. We accomplish this goal by citing two diverse optical characterization projects. In the first project, an autoclave …
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ZrB2-SiC Based Ultra High Temperature Ceramic Composites: Mechanical Performance and Measurement and Design of Thermal Residual Stresses for Hypersonic Vehicle Applications
… sintered ZrB2-SiC ceramic composites. Residual microstresses appear at the microstructural level (intergranular microstresses) or at the crystal structure level (intragranular microstresses). These microstresses are of enormous importance for the failure mechanisms in ZrB2-SiC ceramics, such as …
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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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Electronic and optical characterisations of silicon quantum dots and its applications in solar cells
… techniques, including Fourier transform infrared spectroscopy (FTIR), micro-Raman spectroscopy, transmission electron microscopy (TEM), X-ray diffraction (XRD), and Secondary ion mass spectroscopy (SIM) were employed to gather structural information about the SiQD/SiO2 SLs. The result combine …
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Multidisciplinary research in Raman spectroscopy, phase imaging and their applications in heat transfer
Recent advances in micro-to-nanoscale heat transfer have led to tremendous research interests in the high spatial resolution thermal characterization techniques. Although great improvement has been made in temperature probe, heat flux measurement and thermophysical properties characterization …
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Silver nanoparticles and thin films for strained-silicon surface enhanced raman spectroscopy and capacitively-coupled radiofrequency heating
… can be utilised to provide surface enhanced Raman spectroscopy (SERS) of the ɛ-Si layer compared to the bulk Si1-xGex virtual substrate – overcoming the need to use low resolution, expensive ultra-violet Raman excitation sources. For biological applications it is thought (based on recent work …
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Transformation knowledge in pattern analysis with kernel methods - distance and integration kernels
… or real-world biological data resulting from micro-Raman-spectroscopy with the goal of bacteria identification. <br> <br>In addition to the demonstration that transformation knowledge can be involved in kernel functions in different ways and that these can be practically applied, there are …
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Raman-spektroskopische Untersuchungen an Pflanzen und Mikroorganismen
… Methoden ist die Mikro-Raman-Spektroskopie für diese Fragestellungen besonders gut geeignet, da Wasser Raman-Spektren nur wenig beeinflusst. Daher kann mit Raman-spektroskopischen Methoden auch in stark wasserhaltigem Gewebe gemessen werden. Weiterhin erhält man mit der …