Size and shape of sodium deoxycholate micellar aggregates

G. Esposito, E. Giglio, N. V. Pavel, A. Zanobi

Research output: Contribution to journalArticlepeer-review


From SAXS and ESR measurements carried out on sodium deoxycholate (NaDC) aqueous solutions as a function of NaDC and NaCl concentrations and temperature we have deduced the mean hydrodynamic radius, shape, and aggregation number of the micellar aggregates. The validity of a helical model previously proposed for NaDC micellar aggregates was satisfactorily checked. Some limits of the experimental techniques are discussed. A qualitative agreement between the data obtained from SAXS and ESR measurements was observed. The extent of micellar growth increases with the concentration of added NaCl and as the temperature is lowered. Much smaller changes than for the ionic strength were detected by increasing the NaDC concentration within the range 0.05-0.15 M.

Original languageEnglish (US)
Pages (from-to)356-362
Number of pages7
JournalJournal of physical chemistry
Issue number2
StatePublished - 1987

ASJC Scopus subject areas

  • General Engineering
  • Physical and Theoretical Chemistry


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