Electrophoretic stretching of tethered polymer chains by travelling-wave electric fields: tunable stretching, expedited coil–stretch transition, and a new paradigm of dynamic molecular probing

Soft Matter ◽  
2012 ◽  
Vol 8 (6) ◽  
pp. 1977-1990 ◽  
Author(s):  
Yen-Ching Li ◽  
Ten-Chin Wen ◽  
Hsien-Hung Wei
Keyword(s):  
Electric Fields ◽  
Travelling Wave ◽  
Polymer Chains ◽  
New Paradigm ◽  
Tethered Polymer Chains

Shear Forces between Tethered Polymer Chains as a Function of Compression, Sliding Velocity, and Solvent Quality

2003 ◽  
Vol 36 (2) ◽  
pp. 389-398 ◽  
Author(s):  
Phillip A. Schorr ◽  
Thomas C. B. Kwan ◽  
S. Michael Kilbey ◽  
Eric S. G. Shaqfeh ◽  
Matthew Tirrell
Keyword(s):  
Polymer Chains ◽  
Sliding Velocity ◽  
Shear Forces ◽  
Solvent Quality ◽  
Tethered Polymer Chains

End-Tethered Polymer Chains under AFM Tips:  Compression and Escape in Theta Solvents

Langmuir ◽  
1997 ◽  
Vol 13 (21) ◽  
pp. 5691-5696 ◽  
Author(s):  
M. C. Guffond ◽  
D. R. M. Williams ◽  
E. M. Sevick
Keyword(s):  
Polymer Chains ◽  
Tethered Polymer Chains ◽  
Afm Tips

scholarly journals Influence of the Architecture of Soft Polymer-Functionalized Polymer Nanoparticles on Their Dynamics in Suspension

Polymers ◽  
2020 ◽  
Vol 12 (8) ◽  
pp. 1844
Author(s):  
Young-Gon Kim ◽  
Waraporn Wichaita ◽  
Héloïse Thérien-Aubin
Keyword(s):  
Correlation Time ◽  
Nmr Relaxation ◽  
Thick Layer ◽  
Polymer Chains ◽  
The Core ◽  
Grafting Density ◽  
Tethered Polymer Chains ◽  
Close Proximity ◽  
Soft Polymer ◽  
Tethered Chains

The behavior of nanogels in suspension can be dramatically affected by the grafting of a canopy of end-tethered polymer chains. The architecture of the interfacial layer, defined by the grafting density and length of the polymer chains, is a crucial parameter in defining the conformation and influencing the dynamics of the grafted chains. However, the influence of this architecture when the core substrate is itself soft and mobile is complex; the dynamics of the core influences the dynamics of the tethered chains, and, conversely, the dynamics of the tethered chains can influence the dynamics of the core. Here, poly(styrene) (PS) particles were functionalized with poly(methyl acrylate) (PMA) chains and swollen in a common solvent. NMR relaxation reveals that the confinement influences the mobility of the grafted chain more prominently for densely grafted short chains. The correlation time associated with the relaxation of the PMA increased by more than 20% when the grafting density increased for short chains, but for less than 10% for long chains. This phenomenon is likely due to the steric hindrance created by the close proximity to the rigid core and of the neighboring chains. More interestingly, a thick layer of a densely grafted PMA canopy efficiently increases the local mobility of the PS cores, with a reduction of the correlation time of more than 30%. These results suggest an interplay between the dynamics of the core and the dynamics of the canopy.

scholarly journals Dipolophoresis and Travelling-Wave Dipolophoresis of Metal Microparticles

Micromachines ◽  
2020 ◽  
Vol 11 (3) ◽  
pp. 259
Author(s):  
Jose Eladio Flores-Mena ◽  
Pablo García-Sánchez ◽  
Antonio Ramos
Keyword(s):  
Electric Fields ◽  
Particle Motion ◽  
Numerical Solutions ◽  
Particle Surface ◽  
Travelling Wave ◽  
Aqueous Electrolytes ◽  
Small Particles ◽  
Ac Electric Fields ◽  
Induced Charge ◽  
Analytical Expressions

We study theoretically and numerically the electrokinetic behavior of metal microparticles immersed in aqueous electrolytes. We consider small particles subjected to non-homogeneous ac electric fields and we describe their motion as arising from the combination of electrical forces (dielectrophoresis) and the electroosmotic flows on the particle surface (induced-charge electrophoresis). The net particle motion is known as dipolophoresis. We also study the particle motion induced by travelling electric fields. We find analytical expressions for the dielectrophoresis and induced-charge electrophoresis of metal spheres and we compare them with numerical solutions. This validates our numerical method, which we also use to study the dipolophoresis of metal cylinders.

scholarly journals Transitions of tethered polymer chains: A simulation study with the bond fluctuation lattice model

2008 ◽  
Vol 128 (6) ◽  
pp. 064903 ◽  
Author(s):  
Jutta Luettmer-Strathmann ◽  
Federica Rampf ◽  
Wolfgang Paul ◽  
Kurt Binder
Keyword(s):  
Simulation Study ◽  
Lattice Model ◽  
Polymer Chains ◽  
Tethered Polymer Chains ◽  
Bond Fluctuation
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