Marginal Nature of DNA Solutions

Eyal Shafran, Alon Yaniv, Oleg Krichevsky

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


We adapt a scanning fluorescence correlation spectroscopy technique to measure the structure factor of complex fluid systems and present the first measurements of the structure of semidilute solutions of long DNA polymers. The measured structure factors exhibit screening effects which, as expected for semidilute polymer solutions, grow stronger with increasing DNA concentration c. The measured concentration dependence of the screening length ξ c0.53 ±0.02 is unusual, but can be understood within the framework of a marginal solutions theory for semiflexible polymers.

Original languageEnglish
Article number128101
JournalPhysical Review Letters
Issue number12
StatePublished - 23 Mar 2010

ASJC Scopus subject areas

  • General Physics and Astronomy


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