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    Electrodeposition of gold nanotubes in porous templates

    , Ph.D. Dissertation Sharif University of Technology Bahari Mollamahale, Yaser (Author) ; Ghorbani, Mohammad (Supervisor) ; Dolati, Abolghasem (Supervisor) ; Vosoughi, Manouchehr (Co-Advisor)
    Abstract
    Detection and determination of ultra-trace electroactive materials using electrochemical methods have been widely employed by researchers since they offer a fast, easy and reliable approach. In this way, developing of new nanoelectrodes with special and unique properties plays a profound role on the achievement of better results.
    Gold nanoelectrode ensembles are one of the most important nanoelectrodes which due to the high surface area, chemical, electrochemical and physical stability, and integration of a large number of individual nanoelectrodes, introduce excellent opportunities to be employed as promising nanoelectrodes in determinations applications.
    In this work, preparation... 

    Development of a Polymeric Scaffold for Periodontal Regeneration

    , M.Sc. Thesis Sharif University of Technology Rahimi Nasrabadi, Kosar (Author) ; Abdekhodaie, Mohammad Jafar (Supervisor)
    Abstract
    Periodontitis is a common inflammatory disease that affects the periodontium.Periodontium includes two hard tissues of cementum and alveolar bone and also soft tissue of periodontal ligament. The appropriate function is based on the consistency and accurate interaction of them. The complex structure, the low potential of the body for spontaneous healing, and technical problems such as bacteria accumulation, limited access, and small operating field cause no complete treatment can be achieved until now.In this project, at first collagen type I was extracted from Bovine Achilles tendon. Then, polymer modification was done to 39.95 µg/mg (Tyramine/ Collagen). An In situ gel based on modified... 

    Electrochemical Degradation of Organic Pollutants in the Presence of Spinel Cobalt Ferrite Nanoparticles: Investigation of the Effective Parameters and Evaluation of Degradation Kinetics

    , M.Sc. Thesis Sharif University of Technology Mousavi, Sadegh (Author) ; Rahman Setayesh, Shahrbanoo (Supervisor)
    Abstract
    In this study, CoFe2O4/CuO nanocomposite was synthesized by hydrothermal method and utilized for removal of metronidazole in electro-Fenton process. Nanocomposite was characterized by FT-IR, XRD, FE-SEM, VSM and BET methods. The Results of XRD patterns confirmed the monoclinic structure formation for copper(Ⅱ) oxide and the spinel structure for CoFe2O4. The FE-SEM images displayed the formation of CuO nanosheets for copper(Ⅱ) oxide and the decoration of cobalt ferrite nanoparticles on the surface of CuO nanosheets. Measurement of the surface area of nanocatalysts using BET isotherm represented the high surface area for CuO nanosheets and the increase of surface area of nanocomposite in... 

    A Gold Nanoparticle-based Colorimetric Sensor Array for Detection and Discrimination of Antibiotics in Groundwater

    , M.Sc. Thesis Sharif University of Technology Hassannia, Maryam (Author) ; Hormozinezhad, Reza (Supervisor)
    Abstract
    Antibiotics (ABs) have been regarded as powerful medications to treat or prevent bacterial infections. The antibiotic resistance though, is one of daunting challenges of our time which has been attributed to the overuse of these drugs and usage of antibiotic-contaminated food resources. Developing rapid and visual detection methods capable of simultaneously monitoring Abs is highly desired due to their harmful effects on human health. In the present study, we have designed a colorimetric sensor array consisting of two types of gold nanoparticles (i.e., Citrate-capped gold nanoparticles (Cit-AuNPs) and Borohydride-capped gold nanoparticles (BH4-AuNPs) for the discrimination and determination... 

    Antibiotic Delivery System for Dental Pulp

    , M.Sc. Thesis Sharif University of Technology Shahmoradi, Elnaz (Author) ; Abdekhodaie, Mohammad Jafari (Supervisor) ; Nekoofar, Mohammad Hossein (Supervisor)
    Abstract
    A triple antibiotic mixture (ciprofloxacin, metronidazole, and minocycline) has been used for dental root canal medicaments in pulp regeneration therapy. However, tooth discolorations, cervical root fractures, and inadequate pulp-dentin formation have been reported due to the triple antibiotic regimen. Therefore, antibiotic containing scaffold has been developed to minimize the clinical limitations and maximize a natural healing process in root canal infections. The ideal controlled release drug device should have the following characteristics. It should not degrade inside the root canal and it should be easily inserted into and removed from the root canal. In addition, the drug should be...