Author, Institution: Erika Rajackaitė, Kaunas University of Technology
Science area, field of science: Technological Sciences, Materials Engineering, T008
Scientific Supervisor: Prof. Dr. Hab. Sigitas Tamulevičius (Kaunas University of Technology, Technological Sciences, Materials Engineering, T008)
Dissertation Defence Board of Materials Engineering Science Field:|
Prof. Dr. Hab. Juozas Vidas Gražulevičius (Kaunas University of Technology, Technological Sciences, Materials Engineering, T008) – chairperson
Dr. Donats Erts (University of Latvia, Technological Sciences, Materials Engineering, T008)
Prof. Dr. Hab. Arvaidas Galdikas (Kaunas University of Technology, Technological Sciences, Materials Engineering, T008)
Senior Research Assistant Dr. Viktoras Grigaliūnas (Kaunas University of Technology, Technological Sciences, Materials Engineering, T008)
Prof. Dr. Hab. Nerija Žurauskienė (State research institute Center for Physical Sciences and Technology, Natural Sciences, Physics, N002)
The dissertation defence was at the Meeting room at Santaka Valley of Kaunas University of Technology (K. Baršausko 59 – A228, Kaunas)
The doctoral dissertation is available at the library of Kaunas University of Technology (K. Donelaičio g. 20, Kaunas)
Annotation:
The comprehensive characterization of structure, morphology, physical properties of graphene while setting the main focus on qualitative and quantitative defects/disorder studies is crucial for graphene layers evaluation and development acceleration of various graphene applications. In the dissertation work the correlation between the results of distinct analysis methods such as Raman scattering spectroscopy, scanning electron microscopy, atomic force microscopy, X-ray photoelectron spectroscopy, fluorescence and transient absorption spectroscopy (TAS) of graphene of two different structures: the planar graphene and vertical graphene nanosheets (VGN) produced by microwave plasma activated chemical vapour deposition technique has been explored. As most informative and advanced Raman scattering spectroscopy method showed having some limitations, in current research was demonstrated that TAS analysis of the excited state relaxation dynamics in graphene (by measuring hot electrons cooling dynamics that originates from electron-phonon interactions, leading to phonon-phonon interactions) could be a perspective complementary tool as a source of information about the structure, defects and respectively – the quality of graphene. Synthesized planar graphene layers were applied as transparent, flexible electrodes in organic devices.
August 31 d. 12:00
Meeting room at Santaka Valley of Kaunas University of Technology (K. Baršausko 59 – A228, Kaunas)
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