Sedimentation and diffusion in an experimental hard-sphere-plus-dipolar colloidal system

Newman, Hugh D. (2013) Sedimentation and diffusion in an experimental hard-sphere-plus-dipolar colloidal system. Masters thesis, Memorial University of Newfoundland.

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Laser scanning confocal microscopy was used to image a thin sediment of a Brownian colloidal suspension of PMMA spheres in a decalin/TCE solvent. The sediment is imaged in its entirety in 3-dimensions, as well as with 2-dimensional time-series captured incrementally throughout the sediment. The structure and dynamics are analysed and compared to a hard-sphere system. AC electric fields are applied parallel to gravity to attempt to induce a dipolar interaction in the colloidal spheres. If the system is confirmed to be hard-sphere like, then this allows comparison of the system with applied fields to a hard-sphere-plus-dipolar system.

Item Type: Thesis (Masters)
Item ID: 11136
Additional Information: Includes bibliographical references (leaves 105-109).
Department(s): Science, Faculty of > Physics and Physical Oceanography
Date: 2013
Date Type: Submission
Library of Congress Subject Heading: Colloids--Properties; Colloids--Diffusion rate; Brownian movements; Confocal microscopy; Scanning systems.

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