TY  - JOUR
AU  - Gawlitza, Kornelia
AU  - Ivanova, Oxana
AU  - Radulescu, Aurel
AU  - Holderer, Olaf
AU  - von Klitzing, Regine
AU  - Wellert, Stefan
TI  - Bulk Phase and Surface Dynamics of PEG Microgel Particles
JO  - Macromolecules
VL  - 48
IS  - 16
SN  - 1520-5835
CY  - Washington, DC
PB  - Soc.
M1  - FZJ-2015-05339
SP  - 5807 - 5815
PY  - 2015
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000360324400043
DO  - DOI:10.1021/acs.macromol.5b00788
UR  - https://juser.fz-juelich.de/record/203396
ER  -