Search for dissertations about: "Raman spectra"

Showing result 21 - 25 of 87 swedish dissertations containing the words Raman spectra.

  2. 21. Nuclear Dynamics in X-ray Absorption and Raman Scattering

    Author : Ivaylo Minkov; Faris Gelmukhanov; Knut Borve; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; x-ray scattering; theory; simulations; recoil; Doppler effect; nuclear dynamics; Auger; XPS; Theoretical chemistry; Teoretisk kemi;

    Abstract : This thesis presents theoretical studies of several x-ray spectroscopies - x-ray absorption, x-ray photoelectron emission, radiative and non-radiative resonant Raman scattering spectroscopy. The main focus point is investigating the influence of nuclear dynamics on these spectra for a variety of small molecules - naphthalene, biphenyl, ethylene, the water dimer, HCl, CO. READ MORE

  4. 22. ROBUST DETECTION AND SPECTRAL ANALYSIS OF SIGNALS WITH APPLICATIONS IN SPECTROSCOPY

    Author : Naveed Butt; Matematisk statistik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Detection; NQR; NMR; Raman Spectroscopy; Spectral Analysis.;

    Abstract : Modern spectroscopic techniques, such as nuclear quadrupole resonance (NQR), nuclear magnetic resonance (NMR), and Raman spectroscopy, rely heavily on statistical signal processing systems for decision making and information extraction. The first part of this thesis introduces novel robust algorithms for detection, estimation, and classification of signals obtained through these spectroscopic techniques. READ MORE

  5. 23. Methods, Instrumentation and Mechanisms for Optical Characterization of Tissue and Treatment of Malignant Tumours

    Author : Sara Pålsson; Atomfysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; temperature; perfusion; PDT; photodynamic therapy; mechanisms; tissue characterization; instrumentation; optical biopsy; fluorescence spectroscopy; spectroscopy techniques; Raman spectroscopy; interstitial photodynamic therapy; photodynamic threshold dose; Atomic and molecular physics; Atom- och molekylärfysik;

    Abstract : In this thesis, different optical methods utilising visible light for characterization of tissue have been developed and evaluated. The feasibility of many of these methods has been demonstrated in the laboratory or in animal experiments. READ MORE

  6. 24. Low dimensional Zinc- and Copper Oxides and their Electronic, Vibrational and Photocatalytic Properties

    Author : Jakob Thyr; Tomas Edvinsson; Thomas Wågberg; Uppsala universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; ZnO; Cu2O; CuO; Cu4O3; Photocatalysis; Raman spectroscopy; Nano materials; Quantum confinement; Quantum dots; Size dependent properties; Crystal orientation; Density functional theory; Engineering Science with specialization in Solid State Physics; Teknisk fysik med inriktning mot fasta tillståndets fysik;

    Abstract : Pollution of water resources is a growing problem in the world and this has drawn the attention to photocatalysis, which is an emerging technology for water purification. In this thesis, low dimensional zinc oxide and copper oxides, which are promising photocatalytic materials, have been studied. READ MORE

  7. 25. Light interactions in flexible conjugated dyes

    Author : Jonas Sjöqvist; Patrick Norman; Per-Olof Åstrand; Linköpings universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; force field; molecular dynamics; QM MM; solvation effects; absorption spectroscopy; fluorescence spectrosocopy; infrared spectroscopy; Raman spectroscopy; stokes shift; conjugated polyelectrolytes;

    Abstract : In this thesis methodological developments have been made for the description of flexible conjugated dyes in room temperature spectrum calculations.The methods in question target increased accuracy and efficiency by combining classical molecular dynamics (MD) simulations with time-dependent response theory spectrum calculations. READ MORE