Glass transition in charged colloidal suspensions


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KAISER, Herbert, 2016. Glass transition in charged colloidal suspensions

@phdthesis{Kaiser2016Glass-35884, title={Glass transition in charged colloidal suspensions}, year={2016}, author={Kaiser, Herbert}, address={Konstanz}, school={Universität Konstanz} }

2016-11-10T12:08:59Z 2016-11-10T12:08:59Z Kaiser, Herbert Glasübergang in geladenen Kolloidsuspensionen Kaiser, Herbert 2016 eng In this work, charged colloidal suspensions in the vicinity of the glass transition are investigated in both, theoretical and experimental studies. The main focus is to compare predictions from mode coupling theory (MCT) of the glass transition to results from experiments. Other important topics are the characterization of dynamical heterogeneities and the aging process in glass.<br /><br />Two very different colloidal systems are established. The first one consists of moderately charged PMMA colloids with sizes in the micrometer range, such that individual particle motions can be observed in a 3D confocal microscope. An advanced algorithm for the detection of particles in microscope images was implemented, which allows for precise position and size measurements of the particles. Furthermore, a new iterative technique was invented to connect the detected positions to full particle trajectories. The second colloidal system consists of highly charged PS particles with a smaller size of about 100 to 200 nm. In this case, the dynamics is measured by using visible light scattering. Sophisticated experimental techniques, like multi-speckle dynamic wave spectroscopy (MSDWS) and speckle visibility spectroscopy (SVS), allow the determination of dynamic correlation functions covering up to 10 orders of magnitude in time. Glass transition in charged colloidal suspensions

Dateiabrufe seit 10.11.2016 (Informationen über die Zugriffsstatistik)

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