https://doi.org/10.1140/epje/i2008-10447-7
Regular Article
Temperature and concentration dependence of SANS spectra of aqueous solutions of short-chain amphiphiles
1
INFM, Dipartimento di Energetica, dell’Università di Roma “La Sapienza”, Via Scarpa 16, 00161, Roma, Italy
2
Dipartimento di Fisica, dell’Università di Messina, 08166, Vill. S. Agata, Messina, Italy
3
Laboratoire L. Brillouin (CEA/CNRS), CE Saclay, Paris, France
* e-mail: giovanni.darrigo@uniroma1.it
Received:
23
December
2008
Revised:
23
February
2009
Accepted:
25
February
2009
Published online:
6
April
2009
The small-angle neutron scattering (SANS) of some aqueous solutions of short-chain amphiphiles (glycols, diglycols, diols) has been measured as a function of concentration and temperature. The analysis of the spectra in terms of the Teubner-Strey phenomelogical formula indicates that, on increasing the concentration of the amphiphile, the structure of all these systems evolves in a similar way, i.e. a transition from disordered structures toward correlated aggregates (microstructures). The transition is depressed by increasing the temperature.
PACS: 82.70.Uv Surfactants, micellar solutions, vesicles, lamellae, amphiphilic systems, (hydrophilic and hydrophobic interactions) – / 61.05.fg Neutron scattering (including small-angle scattering) – / 61.20.Gy Theory and models of liquid structure –
© EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg, 2009
