Measuring Dielectrophoresis Force Excerted on Polystyrene Micro-Beads using Optical Tweezers

, M.Sc. Thesis Sharif University of Technology Mollaei, Parisa (Author) ; Seyyed Reihani, Nader (Supervisor)

Abstract

The base of dielectrophoresis(DEP) technique has been demonstrated through electro-dynamic interactions between an applied non-uniform AC electric field and induced distributed dipoles within a polarized. In particle manipulation and/or separation using the DEP method, knowledge of precise DEP force of a particle is essential in designing a DEP device and improving its separation efficiency and accuracy. In most DEP studies related to particle manipulation and/or separation, however their absolute DEP forces remain unknown[2]. Insufficient information regarding the DEP behavior of particles can result in preventing a strategic maneuver for efficient particle manipulation and/or separation...

Development of Particulate Zinc-Iron/PTFE Composite and Nanocomposite Coatings Using Electrodeposition

, M.Sc. Thesis Sharif University of Technology Mohagheghi Fard, Omid (Author) ; Ghorbani, Mohammad (Supervisor)

Abstract

Electrodeposition is an old, well known and conventional science surface modification method to improve the surface characteristics, decorative and functional, of a wide variety of materials. This science is considered in nanotechnology as a bottom-up method for fabrication of one, two and three-dimensional nanomaterials. A great variety of secondary components can be added to plating baths resulting in metallic matrix composite and nanocomposite coatings production. Low amounts of iron addition for alloying zinc coatings, significantly increases the corrosion resistance of this generally used metal economically. Superhydrophobic coatings on metallic substrates have shown, during the past...

Models for Technology Assessment and Management of Gas Flare and Developing Strategies for Reducing Flared Gas

, M.Sc. Thesis Sharif University of Technology Moghadam, Morteza (Author) ; Saboohi, Yadollah (Supervisor)

Abstract

The need for planning for the management and recovery of flare gases is an important issue in the energy sector of the country. On a day, about 46 million cubic meters of gas in Iran is burning in the torch, which in addition to the destruction of non-renewable energies, contributes to environmental pollution and emissions of greenhouse gases. Gas burning is one of the few pollutant activities that is due to short-term economic revenues, system design weaknesses, and lack of management in the operation process, with no service provided or value added. Iran is ranked third in the world according to satellite data among the countries that are burning flares. Accordingly, by burning 17/7...