scholarly journals Application of the Eckart frame to soft matter: rotation of star polymers under shear flow

Soft Matter ◽  
2017 ◽  
Vol 13 (39) ◽  
pp. 6988-7000 ◽  
Author(s):  
Jurij Sablić ◽  
Rafael Delgado-Buscalioni ◽  
Matej Praprotnik
Keyword(s):  
Shear Flow ◽  
Soft Matter ◽  
Star Polymers ◽  
Rotating Frame ◽  
Molecular Vibrations ◽  
Matter System ◽  
Matter Rotation

We present the first ever application of the Eckart co-rotating frame to a soft matter system where molecular vibrations and rotation are coupled.

scholarly journals Incorporation of FGF-2 into Pharmaceutical Grade Fucoidan/Chitosan Polyelectrolyte Multilayers

Marine Drugs ◽  
2020 ◽  
Vol 18 (11) ◽  
pp. 531
Author(s):  
Natalie L. Benbow ◽  
Samuel Karpiniec ◽  
Marta Krasowska ◽  
David A. Beattie
Keyword(s):  
Growth Factor ◽  
Fibroblast Growth Factor ◽  
Soft Matter ◽  
Film Structure ◽  
Polyelectrolyte Multilayers ◽  
Fibroblast Growth Factor 2 ◽  
Fibroblast Growth ◽  
Polyelectrolyte Multilayer ◽  
Matter System ◽  
Total Internal Reflectance

Biopolymer polyelectrolyte multilayers are a commonly studied soft matter system for wound healing applications due to the biocompatibility and beneficial properties of naturally occurring polyelectrolytes. In this work, a popular biopolymer, chitosan, was combined with the lesser known polysaccharide, fucoidan, to create a multilayer film capable of sequestering growth factor for later release. Fucoidan has been shown to act as a heparin-mimic due to similarities in the structure of the two molecules, however, the binding of fibroblast growth factor-2 to fucoidan has not been demonstrated in a multilayer system. This study assesses the ability of fucoidan to bind fibroblast growth factor-2 within a fucoidan/chitosan polyelectrolyte multilayer structure using attenuated total internal reflectance infrared spectroscopy and quartz crystal microbalance with dissipation monitoring. The fibroblast growth factor-2 was sequestered into the polyelectrolyte multilayer as a cationic layer in the uppermost layers of the film structure. In addition, the diffusion of fibroblast growth factor-2 into the multilayer has been assessed.

Formation and interaction of self-guided optical beams in a pre-engineered soft-matter system

CLEO: 2013 ◽  
2013 ◽  
Author(s):  
Shima Fardad ◽  
Matthew S. Mills ◽  
Peng Zhang ◽  
Weining Man ◽  
Zhigang Chen ◽  
...  
Keyword(s):  
Soft Matter ◽  
Matter System ◽  
Optical Beams

scholarly journals The nonlinear response of entangled star polymers to startup of shear flow

2009 ◽  
Vol 53 (5) ◽  
pp. 1193-1214 ◽  
Author(s):  
Amy K. Tezel ◽  
James P. Oberhauser ◽  
Richard S. Graham ◽  
Kamakshi Jagannathan ◽  
T. C. B McLeish ◽  
...  
Keyword(s):  
Shear Flow ◽  
Nonlinear Response ◽  
Star Polymers

scholarly journals Deciphering the dynamics of star molecules in shear flow

Soft Matter ◽  
2017 ◽  
Vol 13 (29) ◽  
pp. 4971-4987 ◽  
Author(s):  
Jurij Sablić ◽  
Matej Praprotnik ◽  
Rafael Delgado-Buscalioni
Keyword(s):  
Shear Flow ◽  
Star Polymers ◽  
Star Molecules

Under shear flow, star polymers tank-tread. We describe another elongational vibration, “breathing”, and relate it with chains’ and rings’ tumbling.

scholarly journals Slowing down of dynamics and orientational order preceding crystallization in hard-sphere systems

2020 ◽  
Vol 6 (43) ◽  
pp. eabc5916
Author(s):  
Felix Lehmkühler ◽  
Birgit Hankiewicz ◽  
Martin A. Schroer ◽  
Leonard Müller ◽  
Beatrice Ruta ◽  
...  
Keyword(s):  
Hard Sphere ◽  
Soft Matter ◽  
Volume Fraction ◽  
Orientational Order ◽  
Strong Increase ◽  
Quasi Equilibrium ◽  
Slowing Down ◽  
X Ray Scattering ◽  
Matter System ◽  
Scattering Study

Despite intensive studies in the past decades, the local structure of disordered matter remains widely unknown. We show the results of a coherent x-ray scattering study revealing higher-order correlations in dense colloidal hard-sphere systems in the vicinity of their crystallization and glass transition. With increasing volume fraction, we observe a strong increase in correlations at both medium-range and next-neighbor distances in the supercooled state, both invisible to conventional scattering techniques. Next-neighbor correlations are indicative of ordered precursor clusters preceding crystallization. Furthermore, the increase in such correlations is accompanied by a marked slowing down of the dynamics, proving experimentally a direct relation between orientational order and sample dynamics in a soft matter system. In contrast, correlations continuously increase for nonequilibrated, glassy samples, suggesting that orientational order is reached before the sample slows down to reach (quasi-)equilibrium.

Scanning fluorescence correlation spectroscopy as a versatile tool to measure static and dynamic properties of soft matter systems

Soft Matter ◽  
2015 ◽  
Vol 11 (46) ◽  
pp. 8939-8947
Author(s):  
Manish Nepal ◽  
Alon Oyler-Yaniv ◽  
Oleg Krichevsky
Keyword(s):  
Fluorescence Correlation Spectroscopy ◽  
Soft Matter ◽  
Dynamic Properties ◽  
Correlation Spectroscopy ◽  
Fluorescence Labeling ◽  
Fluorescence Correlation ◽  
Specific Fluorescence ◽  
System P ◽  
Versatile Tool ◽  
Matter System

Scanning fluorescence correlation spectroscopy in combination with specific fluorescence labeling is used to measure different static and dynamic properties of a soft matter system.

Reversible Thermal Gelation in Star Polymers:  An Alternative Route to Jamming of Soft Matter

2001 ◽  
Vol 34 (23) ◽  
pp. 8216-8223 ◽  
Author(s):  
Benoit Loppinet ◽  
Emmanuel Stiakakis ◽  
Dimitris Vlassopoulos ◽  
George Fytas ◽  
Jacques Roovers
Keyword(s):  
Soft Matter ◽  
Star Polymers ◽  
Alternative Route ◽  
Thermal Gelation
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