0000000000214773

AUTHOR

Leena-sisko Johansson

0000-0003-0428-8155

showing 3 related works from this author

Characterization and Electrochemical Properties of Oxygenated Amorphous Carbon (a-C) Films

2016

Amorphous carbon (a-C) films with varying oxygen content were deposited by closed-field unbalanced magnetron sputtering with the aim to understand the effect of oxygen on the structural and physical properties of the films and subsequently correlate these changes with electrochemical properties. The a-C films were characterized by transmission electron microscopy, helium-ion microscopy, atomic force microscopy, Raman spectroscopy, X-ray photoelectron spectroscopy and time-of-flight elastic recoil detection analysis. The electrochemical properties were studied by electrochemical impedance spectroscopy and cyclic voltammetry with several redox systems (Ru(NH3)62+/3+, Fe(CN)64−/3−, dopamine an…

Materials scienceGeneral Chemical EngineeringInorganic chemistryAnalytical chemistrychemistry.chemical_element02 engineering and technology010402 general chemistry01 natural sciencesOxygenRedoxunbalanced magnetron sputteringElectrochemistryoxygenated amorphous carbonta114ta213021001 nanoscience & nanotechnologyAscorbic acidelectron transfercyclic voltammetry0104 chemical sciencesAmorphous solidDielectric spectroscopyCarbon filmelectrochemical impedance spectroscopyAmorphous carbonchemistryCyclic voltammetry0210 nano-technologyElectrochimica Acta
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Chemical characterization and ultrastructure study of pulp fibers

2020

Abstract Understanding the ultrastructure and chemical characterization of pulp fibers is highly important in utilizing wood as a raw material in a wide scope of applications, such as forest biomass-based biorefineries and low-cost renewable materials. The observation of the ultrastructure is not possible without advanced microscopy and spectroscopy techniques. Therefore, this study focuses on exploring the ultrastructure of pulp fibers with helium ion microscopy (HIM) and scanning electron microscopy (SEM). For the analysis of chemical characterization in the pulp fibers, Raman spectroscopy, Fourier transform infrared spectroscopy (FT-IR), and X-ray photoelectron spectroscopy (XPS) were pe…

Materials sciencePolymers and PlasticsScanning electron microscope02 engineering and technologyengineering.material010402 general chemistry01 natural sciencesCatalysisBiomaterialschemistry.chemical_compoundColloid and Surface Chemistrystomatognathic systemMicroscopyMaterials ChemistryLigninCelluloseFourier transform infrared spectroscopyPulp (paper)021001 nanoscience & nanotechnology0104 chemical sciencesElectronic Optical and Magnetic Materialsstomatognathic diseaseschemistryKraft processChemical engineeringengineeringUltrastructure0210 nano-technologyMaterials Today Chemistry
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Influence of pulp bleaching and compatibilizer selection on performance of pulp fiber reinforced PLA biocomposites

2019

Materials sciencebiocompositePolymers and PlasticsPulp (paper)General Chemistryengineering.materialPulp and paper industrySurfaces Coatings and Filmsadhesionwood-based fiberspulp fibersMaterials ChemistryengineeringPulp bleachingpoly(lactic acid)Biocompositeta216JOURNAL OF APPLIED POLYMER SCIENCE
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