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@INPROCEEDINGS{Frielinghaus:849991,
author = {Frielinghaus, Henrich and Jaksch, Sebastian and Holderer,
Olaf and Gvaramia, Manuchar and Ohl, Michael and
Monkenbusch, Michael},
title = {{V}iscoelastic membrane modes adjacent to a hard wall},
school = {McMaster University},
reportid = {FZJ-2018-04079},
year = {2018},
abstract = {SoyPC membrane stack modes adjacent to a hard hydrophilic
wall were observed to be of viscoelastic character on
nanosecond time scales [1]. This is astonishing because
nearly all soft matter systems display over-damped behavior
on nanosecond time scales, because the molecular friction is
rather strong. This has direct impact on energy dissipation
along the membrane, because shock energies could be
distributed over larger areas as classically into the volume
in the normal direction. Membrane stacks in mammalian joints
could benefit from that effect.We started to observe soyPC
membrane stacks in terms of structure using grazing
incidence small angle neutron scattering. These systems we
doped with ibuprofen [2] molecules to observe the
malfunction of the membrane. Ibuprofen is known to cause
stomach bleeding upon extensive use.The pure membranes in
water were studied using grazing incidence neutron spin echo
spectroscopy. One drawback of this method is the weak
scattering intensity resulting from small scattering volumes
next to the solid-liquid interface and from the small
apertures that are needed to define the incident angle well.
A neutron resonator [3] was developed to enhance the
impinging wave-field dramatically such that neutron
spectroscopy at interfaces becomes feasible.References[1] S.
Jaksch, O. Holderer, M. Gvaramia, M. Ohl, M. Monkenbusch, H.
Frielinghaus, Sci. Reports 7, 4417 (2017)[2] S. Jaksch, F.
Lipfert, A. Koutsioubas, S. Mattauch, O. Holderer, O.
Ivanova, H. Frielinghaus, S. Hertrich, S.F. Fischer, B.
Nickel, Phys. Rev. E 91, 022716 (2015)[3] H. Frielinghaus,
M. Gvaramia, G. Mangiapia, S. Jaksch, M. Ganeva, A.
Koutsioubas, S. Mattauch, M. Ohl, M. Monkenbusch, O.
Holderer, Nucl. Instr. Meth. Phys. Res. A 871, 72-76 (2017)},
month = {Jul},
date = {2018-07-02},
organization = {International Workshop on Status and
Perspectives in Research on Membrane
Structure and Interaction, Hamilton
(Canada), 2 Jul 2018 - 4 Jul 2018},
subtyp = {Other},
cin = {JCNS (München) ; Jülich Centre for Neutron Science JCNS
(München) ; JCNS-FRM-II / Neutronenstreuung ; JCNS-1},
cid = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
I:(DE-Juel1)JCNS-1-20110106},
pnm = {6215 - Soft Matter, Health and Life Sciences (POF3-621) /
6G15 - FRM II / MLZ (POF3-6G15) / 6G4 - Jülich Centre for
Neutron Research (JCNS) (POF3-623)},
pid = {G:(DE-HGF)POF3-6215 / G:(DE-HGF)POF3-6G15 /
G:(DE-HGF)POF3-6G4},
experiment = {EXP:(DE-MLZ)KWS1-20140101 / EXP:(DE-MLZ)MARIA-20140101 /
EXP:(DE-MLZ)J-NSE-20140101 / EXP:(DE-Juel1)SNS-NSE-20150203},
typ = {PUB:(DE-HGF)6},
url = {https://juser.fz-juelich.de/record/849991},
}