Université de Fribourg

Structure and "surfactochromic" properties of conjugated polyelectrolyte (CPE): surfactant complexes between a cationic polythiophene and SDS in water

Knaapila, Matti ; Evans, Rachel C. ; Garamus, Vasil M. ; Almásy, László ; Székely, Noémi K. ; Gutacker, Andrea ; Scherf, Ullrich ; Burrows, Hugh D.

In: Langmuir, 2010, vol. 26, no. 19, p. 15634–15643

We report on the phase transitions, solution structure, and consequent effect on the photophysical properties of poly[3-(6-trimethylammoniumhexyl)thiophene] bromide (P3TMAHT) in aqueous sodium dodecylsulfate (SDS). Polythiophene was mixed with SDS or deuterated SDS to form P3TMAHT(SDS)x complex (x = the molar ratio of surfactant over monomer units) in D₂O and studied by...

Université de Fribourg

Interaction of mono-carboxylic acids in benzene studied by small-angle neutron scattering

Petrenko, Viktor I. ; Avdeev, Mikhail V. ; Almásy, László ; Bulavin, Leonid A. ; Aksenov, Victor L. ; Rosta, László ; Garamus, Vasil M.

In: Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2009, vol. 337, no. 1-3, p. 91-95

The intermolecular interaction of non-saturated (oleic acid) and saturated (stearic and myristic acids) mono-carboxylic acids in a non-polar organic solvent (deuterated benzene) is derived from the concentration dependence of the small-angle neutron scattering. The excluded volume repulsion dominates over the attraction (supposed due to van der Waals forces) for oleic and myristic acids. In turn,...

See also: similar author names
1 Garamus, Vasil
2 Garamus, Vasil M.