scholarly journals Understanding near-surface polymer dynamics by a combination of grazing-incidence neutron scattering and virtual experiments

2021 ◽  
Vol 54 (1) ◽  
Author(s):  
Tetyana Kyrey ◽  
Marina Ganeva ◽  
Judith Witte ◽  
Regine von Klitzing ◽  
Stefan Wellert ◽  
...  
Keyword(s):  
Data Analysis ◽  
Spin Echo ◽  
Grazing Incidence ◽  
Incidence Geometry ◽  
Polymer Dynamics ◽  
Neutron Spin ◽  
Time Range ◽  
Near Surface ◽  
Virtual Experiments ◽  
Neutron Spin Echo

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.

A grazing incidence neutron spin echo study of near surface dynamics in p(MEO2MA-co-OEGMA) copolymer brushes

2018 ◽  
Vol 296 (12) ◽  
pp. 2005-2014 ◽  
Author(s):  
Stefan Wellert ◽  
Jessica Hübner ◽  
Dikran Boyaciyan ◽  
Oxana Ivanova ◽  
Regine von Klitzing ◽  
...  
Keyword(s):  
Spin Echo ◽  
Grazing Incidence ◽  
Neutron Spin ◽  
Surface Dynamics ◽  
Near Surface ◽  
Neutron Spin Echo ◽  
Copolymer Brushes

scholarly journals J-NSE: Neutron spin echo spectrometer

2015 ◽  
Vol 1 ◽  
Author(s):  
Olaf Holderer ◽  
Oxana Ivanova
Keyword(s):  
Neutron Scattering ◽  
Inelastic Neutron Scattering ◽  
Spin Echo ◽  
Inelastic Neutron ◽  
Neutron Spin ◽  
Time Range ◽  
Push Button ◽  
Near Surface ◽  
Neutron Spin Echo ◽  
Scattering Technique

Neutron Spin-Echo (NSE) spectroscopy is well known as the only neutron scattering technique that achieves energy resolution of several neV. By using the spin precession of polarized neutrons in magnetic field one can measure tiny velocity changes of the individual neutron during the scattering process. Contrary to other inelastic neutron scattering techniques, NSE measures the intermediate scattering function S(Q,t) in reciprocal space and time directly. The Neutron Spin-Echo spectrometer J-NSE, operated by JCNS, Forschungszentrum Jülich at the Heinz Maier-Leibnitz Zentrum (MLZ) in Garching, covers a time range (2 ps to 200 ns) on length scales accessible by small angle scattering technique. Along with conventional NSE spectroscopy that allows bulk measurements in transmission mode, J-NSE offers a new possibility - gracing incidence spin echo spectroscopy (GINSENS), developed to be used as "push-button" option in order to resolve the depth dependent near surface dynamics.

scholarly journals Grazing Incidence Neutron Spin Echo Study of Poly(N-isopropylacrylamide) Brushes

2020 ◽  
Vol 53 (5) ◽  
pp. 1819-1830 ◽  
Author(s):  
Judith Witte ◽  
Patrick Krause ◽  
Tetyana Kyrey ◽  
Anna Margarethe Dahl ◽  
Jana Lutzki ◽  
...  
Keyword(s):  
Spin Echo ◽  
Grazing Incidence ◽  
Neutron Spin ◽  
Neutron Spin Echo

scholarly journals Resolving Segmental Polymer Dynamics in Nanocomposites by Incoherent Neutron Spin–Echo Spectroscopy

2020 ◽  
Vol 9 (6) ◽  
pp. 910-916
Author(s):  
Dafne Musino ◽  
Julian Oberdisse ◽  
Bela Farago ◽  
Angel Alegria ◽  
Anne-Caroline Genix
Keyword(s):  
Spin Echo ◽  
Polymer Dynamics ◽  
Neutron Spin ◽  
Neutron Spin Echo ◽  
Incoherent Neutron

Disentangling of complex polymer dynamics under soft nanoscopic confinement

Soft Matter ◽  
2020 ◽  
Vol 16 (45) ◽  
pp. 10377-10385
Author(s):  
Björn Kuttich ◽  
Ingo Hoffmann ◽  
Bernd Stühn
Keyword(s):  
Spin Echo ◽  
Polymer Dynamics ◽  
Neutron Spin ◽  
Droplet Dynamics ◽  
Neutron Spin Echo ◽  
The Core ◽  
Complex Polymer ◽  
Droplet Phase

PEG confined to the core of a droplet phase microemulsion is located at the water/surfactant interface. Neutron spin echo spectroscopy allows to disentangle polymer from droplet dynamics. Under large confinement sizes accelerated dynamics are found.

scholarly journals Using Neutron Spin Echo Resolved Grazing Incidence Scattering to Investigate Organic Solar Cell Materials

10.3791/51129 ◽  
2014 ◽  
Author(s):  
Andrew J. Parnell ◽  
Adam Hobson ◽  
Robert M. Dalgliesh ◽  
Richard A. L. Jones ◽  
Alan D. F. Dunbar
Keyword(s):  
Solar Cell ◽  
Organic Solar Cell ◽  
Spin Echo ◽  
Grazing Incidence ◽  
Neutron Spin ◽  
Neutron Spin Echo

scholarly journals Grazing incidence neutron spin echo spectroscopy: instrumentation aspects and scientific opportunities

2014 ◽  
Vol 528 ◽  
pp. 012025 ◽  
Author(s):  
O Holderer ◽  
H Frielinghaus ◽  
S Wellert ◽  
F Lipfert ◽  
M Monkenbusch ◽  
...  
Keyword(s):  
Spin Echo ◽  
Grazing Incidence ◽  
Neutron Spin ◽  
Neutron Spin Echo ◽  
Spectroscopy Instrumentation
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