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    Fabrication of Hybrid Graphene/Metal Electrodes for Biosensor Applications

    , M.Sc. Thesis Sharif University of Technology Mohammadzadeh, Amirmahdi (Author) ; Simchi, Abdolreza (Supervisor)
    Abstract
    Electrochemical sensing of glucose has received paramount attention in recent years, particularly, the non-enzymatic glucose sensing is one of the trends in the whole biosensing world. In this research, synthesis and evaluation of a hybrid structure of vertical oriented nickel nanorod-reduced graphene oxide sheets as a non-enzymatic glucose sensor were performed. The 3D array of nickel nanorods was synthesized by electrodeposition of nickel sulfate electrolyte in track-etched polycarbonate template with 100 nm pore size and 6-10 μm thickness. The electrodeposition performed in various conditions, and the best result was achieved by application of potential of 3 V for 60 minutes. The shiny... 

    Synthesis of Titania Hollow Spheres in Dye Sensitized Solar Cell Application

    , M.Sc. Thesis Sharif University of Technology Tabari Saadi, Yasaman (Author) ; Mohammadi, Mohammad Reza (Supervisor)
    Abstract
    In the current research, Anatase-Rutile Titania hollow spheres were synthesized using hydrothermally prepared carbon spheres as template. Different calcination temperatures were used to remove carbon template and crysalized Titania. The characterizations for the physicochemical properties of prepared samples were carried out by XRD, FESEM, XPS, DRS, UV-Vis and FTIR.It is found that doping of carbon in the crystal structure of Titania hollow sphere, cause red shift in band gap wavelenght and the absorption wavelength edge was expanded to the visible light region and the additional diffusive electronic states were observed on the valence band spectra of samples.The photoelectric conversion...