Krishnaswamy, Rema and Raghunathan, VA and Sood, AK (2004) Reentrant phase transitions of DNA-surfactant complexes. In: Physical Review E (Statistical, Nonlinear, and Soft Matter Physics), 69 (3). pp. 31905-1.
Complexes of double-stranded DNA with the cationic surfactant cetyltrimethylammonium bromide have been studied using small angle x-ray diffraction at varying concentrations of DNA and the cosurfactant hexanol. At low DNA concentrations, an intercalated hexagonal (HIc)-lamellar (L ac )-inverted hexagonal (HIIc ) transformation is found on increasing hexanol content. The HII c structure is converted into L a c on adding more DNA. Further increase in hexanol content leads to a phase separation in the surfactant solution, and a reentrant L a c-HII c -L a c transition is observed as DNA concentration is increased. Such structural transformations of DNA-surfactant complexes, driven by DNA concentration, have not been reported until now.
|Item Type:||Journal Article|
|Additional Information:||Copyright for this article belongs to American Physical Society (APS).|
|Department/Centre:||Division of Physical & Mathematical Sciences > Physics|
|Date Deposited:||10 Dec 2004|
|Last Modified:||19 Sep 2010 04:12|
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