Please use this identifier to cite or link to this item: http://doi.org/10.25358/openscience-3725
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dc.contributor.authorDoroshenko, Mikheil
dc.date.accessioned2014-03-20T12:05:45Z
dc.date.available2014-03-20T13:05:45Z
dc.date.issued2014
dc.identifier.urihttps://openscience.ub.uni-mainz.de/handle/20.500.12030/3727-
dc.description.abstractUnderstanding and controlling the mechanism of the diffusion of small molecules, macromolecules and nanoparticles in heterogeneous environments is of paramount fundamental and technological importance. The aim of the thesis is to show, how by studying the tracer diffusion in complex systems, one can obtain information about the tracer itself, and the system where the tracer is diffusing. rnIn the first part of my thesis I will introduce the Fluorescence Correlation Spectroscopy (FCS) which is a powerful tool to investigate the diffusion of fluorescent species in various environments. By using the main advantage of FCS namely the very small probing volume (<1µm3) I was able to track the kinetics of phase separation in polymer blends at late stages by looking on the molecular tracer diffusion in individual domains of the heterogeneous structure of the blend. The phase separation process at intermediate stages was monitored with laser scanning confocal microscopy (LSCM) in real time providing images of droplet coalescence and growth. rnIn a further project described in my thesis I will show that even when the length scale of the heterogeneities becomes smaller than the FCS probing volume one can still obtain important microscopic information by studying small tracer diffusion. To do so, I will introduce a system of star shaped polymer solutions and will demonstrate that the mobility of small molecular tracers on microscopic level is nearly not affected by the transition of the polymer system to a â glassyâ macroscopic state. rnIn the last part of the thesis I will introduce and describe a new stimuli responsive system which I have developed, that combines two levels of nanoporosity. The system is based on poly-N-isopropylacrylamide (PNIPAM) and silica inverse opals (iOpals), and allows controlling the diffusion of tracer molecules. rnen_GB
dc.language.isoeng
dc.rightsInCopyrightde_DE
dc.rights.urihttps://rightsstatements.org/vocab/InC/1.0/
dc.subject.ddc540 Chemiede_DE
dc.subject.ddc540 Chemistry and allied sciencesen_GB
dc.titleDiffusion in heterogeneous systems studied by laser scanning confocal microscopy and fluorescence correlation spectroscopyen_GB
dc.typeDissertationde_DE
dc.identifier.urnurn:nbn:de:hebis:77-36994
dc.identifier.doihttp://doi.org/10.25358/openscience-3725-
jgu.type.dinitypedoctoralThesis
jgu.type.versionOriginal worken_GB
jgu.type.resourceText
jgu.description.extent113 S.
jgu.organisation.departmentExterne Einrichtungen-
jgu.organisation.year2013
jgu.organisation.number0000-
jgu.organisation.nameJohannes Gutenberg-Universität Mainz-
jgu.rights.accessrightsopenAccess-
jgu.organisation.placeMainz-
jgu.subject.ddccode540
opus.date.accessioned2014-03-20T12:05:45Z
opus.date.modified2020-06-17T09:50:58Z
opus.date.available2014-03-20T13:05:45
opus.subject.dfgcode00-000
opus.organisation.stringExterne Einrichtungen: Max-Plank-Institut für Polymerforschungde_DE
opus.identifier.opusid3699
opus.institute.number5060
opus.metadataonlyfalse
opus.type.contenttypeDissertationde_DE
opus.type.contenttypeDissertationen_GB
jgu.organisation.rorhttps://ror.org/023b0x485
Appears in collections:JGU-Publikationen

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