Dynamics of Weakly Connected Solids: Sintering of Polymeric Aerogels

1989 ◽  
Vol 166 ◽  
Author(s):  
D. W. Schaefer ◽  
D. Richter ◽  
B. Farago ◽  
C. J. Brinker ◽  
C. S. Ashley ◽  
...  
Keyword(s):  
Pore Structure ◽  
Small Angle ◽  
Spin Echo ◽  
Silica Aerogels ◽  
Short Length ◽  
Neutron Spin ◽  
Neutron Spin Echo ◽  
Structure And Dynamics ◽  
Angle Scattering ◽  
Initial Decrease

ABSTRACTA combination of small angle scattering (SAS) and neutron spin-echo (NSE) spectroscopy is used to characterize the structure and dynamics of polymeric silica aerogels during sintering. The SAS data indicate that densification at short length scales precedes the densification at longer scales (comparable to that of the pore structure). Interpreted within the fracton model, the NSE data are consistent with an initial decrease in connectivity during relatively early stages of densification.

DMPC vesicle structure and dynamics in the presence of low amounts of the saponin aescin

2018 ◽  
Vol 20 (14) ◽  
pp. 9070-9083 ◽  
Author(s):  
Ramsia Sreij ◽  
Carina Dargel ◽  
Philippe Geisler ◽  
Yvonne Hertle ◽  
Aurel Radulescu ◽  
...  
Keyword(s):  
Small Angle ◽  
Spin Echo ◽  
Neutron Spin ◽  
X Ray ◽  
Neutron Spin Echo ◽  
Structure And Dynamics ◽  
Vesicle Shape

Vesicle shape and bilayer parameters are studied by small-angle X-ray (SAXS) and small-angle neutron (SANS) scattering in the presence of the saponin aescin. Bilayer dynamics is studied by neutron spin-echo (NSE) spectroscopy.

scholarly journals Inner structure and dynamics of microgels with low and medium crosslinker content prepared via surfactant-free precipitation polymerization and continuous monomer feeding approach

Soft Matter ◽  
2019 ◽  
Vol 15 (32) ◽  
pp. 6536-6546 ◽  
Author(s):  
Tetyana Kyrey ◽  
Judith Witte ◽  
Artem Feoktystov ◽  
Vitaliy Pipich ◽  
Baohu Wu ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Spin Echo ◽  
Polymer Network ◽  
Precipitation Polymerization ◽  
Neutron Spin ◽  
Neutron Spin Echo ◽  
Structure And Dynamics ◽  
Crosslinker Content

Structure and dynamics of polymer network in microgels prepared via different polymerization routes is studied with small angle neutron scattering and neutron spin echo spectroscopy and compared for the cases of low and medium crosslinker content.

Microstructure and Dynamic Properties of Aggrecan Assemblies

MRS Advances ◽  
2018 ◽  
Vol 3 (28) ◽  
pp. 1589-1595 ◽  
Author(s):  
Ferenc Horkay ◽  
Peter J. Basser ◽  
Anne-Marie Hecht ◽  
Erik Geissler
Keyword(s):  
Small Angle Neutron Scattering ◽  
Calcium Metabolism ◽  
Dynamic Properties ◽  
Spin Echo ◽  
Great Sensitivity ◽  
Ion Concentration ◽  
Neutron Spin ◽  
Neutron Spin Echo ◽  
Structure And Dynamics ◽  
Counter Ions

ABSTRACTThe effect of ions on the structure and dynamics of aggracan solutions was investigated using a variety of scattering techniques (neutron spin echo, small angle neutron scattering, static and dynamic light scattering). The results show that aggrecan forms microgel-like assemblies which remain stable in the presence of counter-ions. As opposed to many synthetic polyelectrolytes which exhibit a great sensitivity to ion concentration and charge valency, it was found that aggrecan solutions are remarkable insensitive to charge valence. This property of aggrecan is consistent with its biological role as an ion reservoir mediating calcium metabolism and maintaining dimensional stability in cartilage and bone.

scholarly journals 2P245 Study of raft-model liposome using small-angle neutron scattering and neutron spin echo

2005 ◽  
Vol 45 (supplement) ◽  
pp. S181
Author(s):  
M. Hirai ◽  
M. Koizumi ◽  
H. Hirai ◽  
K. Kasahara ◽  
K. Yuyama ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Spin Echo ◽  
Neutron Spin ◽  
Neutron Spin Echo
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