PlumX Metrics
Embed PlumX Metrics

Observation of polymer conformation hysteresis in extensional flow

Science, ISSN: 0036-8075, Vol: 301, Issue: 5639, Page: 1515-1519
2003
  • 330
    Citations
  • 0
    Usage
  • 198
    Captures
  • 0
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

Article Description

Highly extensible Escherichia coli DNA molecules in planar extensional flow were visualized in dilute solution by fluorescence microscopy. For a narrow range of flow strengths, the molecules were found in either a coiled or highly extended conformation, depending on the deformation history of the polymer. This conformation hysteresis persists for many polymer relaxation times and is due to conformation-dependent hydrodynamic forces. Polymer conformational free-energy landscapes were calculated from computer simulations and show two free-energy minima for flow strengths near the coil-stretch transition. Hysteresis cycles may directly influence bulk-solution stresses and the development of stress-strain relations for dilute polymer flows.

Provide Feedback

Have ideas for a new metric? Would you like to see something else here?Let us know