About: Dynamics in Stimuli-Responsive Poly( N - isopropylacrylamide) Hydrogel Layers As Revealed by Fluorescence Correlation Spectroscopy

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
rdfs:seeAlso	http://pubs.acs.org/doi/pdf/10.1021/ma500928p
Description	We employ fl uorescence correlation spectros- copy (FCS) to study the translational mobility of molecular tracers in stimuli-responsive grafted poly( N -isopropylacryla- mide)(PNiPAAm)hydrogels,undervariablesolvency conditions. Tracer MINUS SIGN matrix interactions were tuned by selecting three di ff erent molecular tracers. In contrast to a non- interacting tracer (Alexa 647), the mobility of a weakly (Alexa 488) and a strongly interacting (Rhodamine 6G) tracer deviates from a simple single Fickian di ff usion. In addition to pure crowding e ff ects, the mobility of both Alexa488 and Rhodamine 6G is in fl uenced by tracer MINUS SIGN polymer interactions. We interpret the observed trends in tracer mobility in terms of the interplay between Coulombic repulsions and short-range attractions. Although tracer dynamics and hydrogel swelling ratio are interdependent properties, their relation turns out to be nontrivial and does not allow predictions of tracer dynamics on the basis of polymer structural information. Hence, a universal scaling behavior is not possible, due to tracer MINUS SIGN polymer interactions. We employ fl uorescence correlation spectros- copy (FCS) to study the translational mobility of molecular tracers in stimuli-responsive grafted poly( N -isopropylacryla- mide)(PNiPAAm)hydrogels,undervariablesolvency conditions. Tracer MINUS SIGN matrix interactions were tuned by selecting three di ff erent molecular tracers. In contrast to a non- interacting tracer (Alexa 647), the mobility of a weakly (Alexa 488) and a strongly interacting (Rhodamine 6G) tracer deviates from a simple single Fickian di ff usion. In addition to pure crowding e ff ects, the mobility of both Alexa488 and Rhodamine 6G is in fl uenced by tracer MINUS SIGN polymer interactions. We interpret the observed trends in tracer mobility in terms of the interplay between Coulombic repulsions and short-range attractions. Although tracer dynamics and hydrogel swelling ratio are interdependent properties, their relation turns out to be nontrivial and does not allow predictions of tracer dynamics on the basis of polymer structural information. Hence, a universal scaling behavior is not possible, due to tracer MINUS SIGN polymer interactions. (en)
Title	Dynamics in Stimuli-Responsive Poly( N - isopropylacrylamide) Hydrogel Layers As Revealed by Fluorescence Correlation Spectroscopy Dynamics in Stimuli-Responsive Poly( N - isopropylacrylamide) Hydrogel Layers As Revealed by Fluorescence Correlation Spectroscopy (en)
skos:prefLabel	Dynamics in Stimuli-Responsive Poly( N - isopropylacrylamide) Hydrogel Layers As Revealed by Fluorescence Correlation Spectroscopy Dynamics in Stimuli-Responsive Poly( N - isopropylacrylamide) Hydrogel Layers As Revealed by Fluorescence Correlation Spectroscopy (en)
skos:notation	RIV/00216208:11310/14:10227324!RIV15-MSM-11310___
http://linked.open...avai/riv/aktivita	I P
http://linked.open...avai/riv/aktivity	I, P(LK21302)
http://linked.open...iv/cisloPeriodika	15
http://linked.open...vai/riv/dodaniDat	2015
http://linked.open...aciTvurceVysledku	Košovan, Peter
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Univerzita Karlova v Praze / Přírodovědecká fakulta
http://linked.open...dnocenehoVysledku	12726
http://linked.open...ai/riv/idVysledku	RIV/00216208:11310/14:10227324
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	ph; microgels; gels; films; networks; diffusion; solid-surfaces; thermoresponsive polymers; polymer-solutions (en)
http://linked.open.../riv/klicoveSlovo	microgels solid-surfaces films polymer-solutions diffusion networks thermoresponsive polymers gels ph
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[9DD63B48A77A]
http://linked.open...i/riv/nazevZdroje	Macromolecules
http://linked.open...in/vavai/riv/obor	CD
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	6 (xsd:int)
http://linked.open...vavai/riv/projekt	Interactions and dynamics in polymer nanostructures
http://linked.open...UplatneniVysledku	2014
http://linked.open...v/svazekPeriodika	47
http://linked.open...iv/tvurceVysledku	Košovan, Peter Koynov, Kaloian Fytas, George Holm, Christian Vagias, Apostolos Butt, Hans-Ju rgen
http://linked.open...ain/vavai/riv/wos	000340350400050
issn	0024-9297
number of pages	10 (xsd:int)
http://bibframe.org/vocab/doi	10.1021/ma500928p
http://localhost/t...ganizacniJednotka	11310

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