TY  - JOUR
AU  - Kyrey, Tetyana
AU  - Ganeva, Marina
AU  - Witte, Judith
AU  - von Klitzing, Regine
AU  - Wellert, Stefan
AU  - Holderer, Olaf
TI  - Understanding near-surface polymer dynamics by a combination of grazing-incidence neutron scattering and virtual experiments
JO  - Journal of applied crystallography
VL  - 54
IS  - 1
SN  - 1600-5767
CY  - [S.l.]
PB  - Wiley-Blackwell
M1  - FZJ-2020-04970
SP  -  
PY  - 2021
AB  - Neutron spin-echo spectroscopy is a unique experimental method for the investigation of polymer dynamics. The combination of neutron spin-echo spectroscopy with grazing-incidence geometry (GINSES) opens the possibility to probe the dynamics of soft-matter materials in the vicinity of the solid substrate in the time range up to 100 ns. However, the usage of the GINSES technique has some peculiarities and, due to the novelty of the method and complexity of the scattering geometry, difficulties in further data analysis occur. The current work discusses how virtual experiments within the distorted-wave Born approximation using the BornAgain software can improve GINSES data treatment and aid the understanding of polymer dynamics in the vicinity of the solid surface. With two examples, poly(N-isopropyl acrylamide) brushes and poly(ethylene glycol) microgels on Si surfaces, the simulation as well as the application of the simulation to the GINSES data analysis are presented. The approach allowed a deeper insight to be gained of the background effect and scattering contribution of different layers.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000613988600009
DO  - DOI:10.1107/S1600576720014739
UR  - https://juser.fz-juelich.de/record/888506
ER  -