Journal Article

FZJ-2015-05339

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Bulk Phase and Surface Dynamics of PEG Microgel Particles

Gawlitza, K. ; Ivanova, O.FZJ* ; Radulescu, A.FZJ* ; Holderer, O.FZJ* ; von Klitzing, R. ; Wellert, S. (Corresponding author)

2015
Soc. Washington, DC

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Please use a persistent id in citations: doi:10.1021/acs.macromol.5b00788

Abstract: The adsorption of ethylene glycol (EG) based microgel particles at silicon surfaces was studied. Monodisperse p-MeO2MA-co-OEGMA microgel particles were synthesized by precipitation polymerization. Translational and inner dynamics of p-ME3O5 and p-ME3O26 microgels in bulk were investigated by dynamic light scattering (DLS) and neutron spin echo spectroscopy in transmission geometry (NSE). Here, cooperative diffusion and Zimm type dynamics were observed. The inner dynamics of these microgel particles in adsorbed state was explored by neutron spin echo spectroscopy under grazing incidence (GINSES). The reported GINSES experiments demonstrate the feasibility of these surface sensitive measurements. It indicates a slowing down of the inner dynamics in the vicinity of the substrate. At increasing distance from the substrate, the relaxation is comparable to the bulk.

Keyword(s): Health and Life (1st) ; Basic research (1st) ; Others (1st) ; Health and Life (1st) ; Soft Condensed Matter (2nd)

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Contributing Institute(s):

1. JCNS-FRM-II (JCNS (München) ; Jülich Centre for Neutron Science JCNS (München) ; JCNS-FRM-II)
2. Neutronenstreuung (Neutronenstreuung ; JCNS-1)

Research Program(s):

1. 6G15 - FRM II / MLZ (POF3-6G15) (POF3-6G15)
2. 6G4 - Jülich Centre for Neutron Research (JCNS) (POF3-623) (POF3-623)

Experiment(s):

1. KWS-2: Small angle scattering diffractometer (NL3ao)
2. J-NSE: Neutron spin-echo spectrometer (NL2ao)

Appears in the scientific report 2015

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Database coverage:
; Current Contents - Physical, Chemical and Earth Sciences ; IF >= 5 ; JCR ; NCBI Molecular Biology Database ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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