Diffusion of fluorescent molecules in micro- and nanostructured environments

Pieper, Thorsten

Diffusion of fluorescent molecules in micro- and nanostructured environments

dc.contributor.advisor	Suter, Dieter
dc.contributor.author	Pieper, Thorsten
dc.contributor.referee	Mathis, Harald P.
dc.date.accepted	2007-08-28
dc.date.accessioned	2007-09-06T10:33:23Z
dc.date.available	2007-09-06T10:33:23Z
dc.date.issued	2007-09-06T10:33:23Z
dc.description.abstract	The thesis deals with phenomena of molecular diffusion in liquid environments. The examination of diffusing molecules provides information about the molecules themselves, and also about the structure of the surrounding media. This work deals with diffusion phenomena on length scales below 100 μm. The liquid phase consists of water or water/surfactant emulsions. The microstructures are fluidic channels etched in wafers of crystalline silicon. In these channels, diffusion-limited mixing at a liquid boundary is examined. These experiments took place in a stationary liquid flow. Environments on the nanoscale are made of binary liquids forming supramolecular orders by self-assembly. From these structures, the micellar and the lamellar structure are examined in particular. The focus is on the influence of cholesterol on the mobility of probe molecules in the lamellar phase. The main experimental method is Fluorescence Correlation Spectroscopy (FCS). Additionally, fundamentals for the tracking of single molecules are established by analyzing video recordings of fluorescing particles. The thesis provides advanced insight into the nature of molecular motion in nearly ideal systems. Further conclusions for investigations in natural environments, as they exist in eukaryotic cells, can be drawn from the experiments.	en
dc.identifier.uri	http://hdl.handle.net/2003/24716
dc.identifier.uri	http://dx.doi.org/10.17877/DE290R-8828
dc.identifier.urn	urn:nbn:de:hbz:290-2003/24716-7
dc.language.iso	en	de
dc.subject	Molekulare Diffusion	de
dc.subject	Flüssige Phase	de
dc.subject	Binäre Wasser/Tensid Mischung	de
dc.subject	Mizellare Phase	de
dc.subject	Lamellare Phase	de
dc.subject	Fluorescence Correlation Spectroscopy	en
dc.subject	Brownsche Bewegung	de
dc.subject.ddc	530
dc.title	Diffusion of fluorescent molecules in micro- and nanostructured environments	en
dc.type	Text	de
dc.type.publicationtype	doctoralThesis	de
dcterms.accessRights	open access

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