Sökning: "Infrared and Raman spectroscopy"

Visar resultat 1 - 5 av 45 avhandlingar innehållade orden Infrared and Raman spectroscopy.

  1. 1. Tin-based Glasses: Structure and Electrochemical Properties

    Författare :Cecilia Gejke; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Li-ion battery; anode; borate glasses; phosphate glasses; tin; reverse Monte Carlo simulation; Raman spectroscopy; infrared spectroscopy; neutron diffraction;

    Sammanfattning : This thesis presents an investigation of microscopic structure and electrochemical properties, and their relationship, for various tin-based borate, phosphate and borophosphate glasses. Tin-based glasses have attracted a lot of scientific interest as anode materials in Li-ion batteries. LÄS MER

  3. 2. Colloidal fumed silica and soluble silicates — Interactions and microstructure

    Författare :Jonas Nordström; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Electrolytes; Infrared spectroscopy; Alkaline sodium silicate; Colloidal stability; Ionic liquids; Gelation; Raman spectroscopy; Photon correlation spectroscopy; Fumed silica; Water glass;

    Sammanfattning : Colloidal dispersions and gels are important material systems with applications in many industrial processes and consumer products. This thesis aims at increasing the understanding of colloidal interactions and the phase transition from a colloidal dispersion to an arrested structure in two systems based on silica. LÄS MER

  4. 3. Crystallization of Parabens : Thermodynamics, Nucleation and Processing

    Författare :Yang Huaiyu; Åke Rasmuson; Joop ter Horst; KTH; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Nucleation; Induction time; Interfacial energy; Ethyl paraben; Propyl paraben; Butyl paraben; Methanol; Ethanol; Propanol; Acetone; Ethyl acetate; Solubility; Thermodynamics; Activity; Activity coefficient; Liquid-liquid phase separation; Ternary phase diagram; Melting point; Boiling point; Polarity; Cooling crystallization; Sandwich crystal; Porous; Particle Vision and Measurement; Focused Beam Reflectance Method; Infrared Spectroscopy; Confocal Raman Microscopy; X-Ray Diffraction; Differential Scanning Calorimetry; SRA - E-Science SeRC ; SRA - E-vetenskap SeRC ;

    Sammanfattning : In this work, the solubility of butyl paraben in 7 pure solvents and in 5 different ethanol-water mixtures has been determined from 1 ˚C to 50 ˚C. The solubility of ethyl paraben and propyl paraben in various solvents has been determined at 10 ˚C. LÄS MER

  5. 4. Blinded by the light : developing models of settlement and mobility with the use of spectroscopy and exploratory methods

    Författare :Mattias Sjölander; Philip I. Buckland; Johan Linderholm; Peter Jordan; Umeå universitet; []
    Nyckelord :HUMANIORA; HUMANITIES; archaeology; hunter-gatherer; spectroscopy; chemometrics; quartz; quartzite; bifacial; lithics; geoarchaeology; exploratory; spatial analysis; modelling; arkeologi; jakt- och fångstfolk; spektroskopi; kemometri; kvarts; kvartsit; bifacial; flathuggen; geoarkeologi; rumslig analys; modellering; Archaeology; arkeologi; environmental archaeology; miljöarkeologi;

    Sammanfattning : In this thesis an exploratory approach has been used to study settlement and mobility among hunter-gatherer societies in Northern Sweden during the 2 000 – 0 BC period. The focus has been on developing the topics of bifacial point use and raw material management of quartzand quartzite materials. LÄS MER

  7. 5. Molecules and Light : A Journey into the World of Theoretical Spectroscopy

    Författare :Iulia Emilia Brumboiu; Barbara Brena; Heather Kulik; Uppsala universitet; []
    Nyckelord :Theoretical spectroscopy; XPS; NEXAFS; PCBM; Metal phthalocyanine; Organic solar cells; Fysik med inriktning mot atom- molekyl- och kondenserande materiens fysik; Physics with spec. in Atomic; Molecular and Condensed Matter Physics;

    Sammanfattning : Two of the main technological challenges of the century are the production of clean energy, on the one hand, and the development of new materials for electronic and spintronic applications that could increase the speed and the storage capacity of regular electronic devices, on the other hand. Organic materials, including fullerenes, organic polymers and organic molecules with metal centres are promising candidates for low-cost, flexible and clean technologies that can address these challenges. LÄS MER