Direct Measurement of the Intermolecular Forces Confining a Single Molecule in an Entangled Polymer Solution
نویسندگان
چکیده
منابع مشابه
Direct measurement of the intermolecular forces confining a single molecule in an entangled polymer solution.
We use optical tweezers to directly measure the intermolecular forces acting on a single polymer imposed by surrounding entangled polymers (115 kbp DNA, 1 mg/ml). A tubelike confining field was measured in accord with the key assumption of reptation models. A time-dependent harmonic potential opposed transverse displacement, in accord with recent simulation findings. A tube radius of 0.8 microm...
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چکیده ندارد.
15 صفحه اولDirect observation of the transition from free to constrained single-segment motion in entangled polymer melts.
We report a direct determination of the time dependent mean-squared segment displacement of a polymer chain in the melt covering the transition from free to constraint Rouse relaxation along the virtual tube of the reptation model. This has been achieved by a neutron spin-echo (NSE) measurement of the segmental self-correlation function as conveyed by the spin-incoherent scattering from two ful...
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ژورنال
عنوان ژورنال: Physical Review Letters
سال: 2007
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.99.126001