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http://hdl.handle.net/2289/2830| Title: | Tuning the structure of surfactant complexes with DNA and other polyelectrolytes |
| Authors: | Krishnaswamy, Rema Mitra, P. Raghunathan, V.A. Sood, A.K. |
| Issue Date: | 1-May-2003 |
| Publisher: | EDP Sciences |
| Citation: | Europhysics Letters, 2003, Vol.62, p357-362 |
| Abstract: | We have carried out small-angle X-ray diffraction studies on complexes formed by the anionic polyelectrolytes, namely, sodium salts of double and single stranded (ds and ss) DNA, poly(glutamic acid) (PGA), poly(acrylic acid) (PAA), and poly(styrene sulfonate) (PSS) with a cationic surfactant system consisting of cetyltrimethylammonium bromide (CTAB) and sodium 3-hydroxy-2-naphthoate (SHN). All complexes have a two-dimensional (2D) hexagonal structure at low SHN concentrations. DNA-CTAB-SHN complexes exhibit a hexagonal to lamellar transition near the SHN concentration at which CTAB-SHN micelles show a cylinder to bilayer transformation. On the other hand, PGA and PAA complexes form a 2D centered rectangular phase at higher SHN concentrations, and PSS complexes show a primitive rectangular structure. These results provide a striking example of polyion specificity in polyelectrolyte-surfactant interactions. |
| Description: | Restricted Access. |
| URI: | http://hdl.handle.net/2289/2830 |
| ISSN: | 0295-5075 1286-4854 (Online) |
| Alternative Location: | http://dx.doi.org/10.1209/epl/i2003-00404-8 |
| Copyright: | 2003 EDP Sciences |
| Appears in Collections: | Research Papers (SCM) |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| 2003 Europhy Lett V62 p357.pdf Restricted Access | Restricted Access | 379.66 kB | Adobe PDF | View/Open Request a copy |
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