Study of Viscoelastic Property of Fluid with Optical Tweezers

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Mirzahossein, Elham | 2018

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 51201 (04)
University: Sharif University of Technology
Department: Physics
Advisor(s): Seyed Reihani, Nader
Abstract:
Viscoelastic properties of biological fluid play an important role on biological organs. As an example we all know that Red blood cells must have high flexibility to pass thorough thin capillary.This high flexibility come partially from cytoplasm and 2 dimensional membrane and partially from polymeric fluid inside the cell(hemoglobin). So, for recognizing mechanical properties of a whole cell we also need to study the same properties just for fluid inside the cell. for this general purpose through this project we are going to measure viscoelastic properties of any polymeric fluid by optical tweezers which has an ability for measuring displacement of micron particle with accuracy of nm. first we measure viscosity of known material like water and mixture of water and glycerol with specified density, eventually we do our experiments on biological fluid(contains biological polymers)
Keywords:
Optical Tweezer ; Viscoelastic Properties ; Biofluid