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

  • Petrenko, Viktor I. Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, Dubna, Russia - Physics Department, Kyiv Taras Shevchenko National University, Kyiv, Ukraine
  • Avdeev, Mikhail V. Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, Dubna, Russia - Russian Research Center “Kurchatov Institute”, Moscow, Russia
  • Almásy, László Adolphe Merkle Institute, University of Fribourg, Switzerland - Laboratory for Neutron Scattering, PSI and ETH Zürich, Villigen, Switzerland
  • Bulavin, Leonid A. Physics Department, Kyiv Taras Shevchenko National University, Kyiv, Ukraine
  • Aksenov, Victor L. Russian Research Center “Kurchatov Institute”, Moscow, Russia - Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, Dubna, Russia
  • Rosta, László Research Institute for Solid State Physics and Optics, Hungarian Academy of Sciences, Budapest, Hungary
  • Garamus, Vasil M. GKSS Research Centre, Geesthacht, Germany
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    09.12.2008
Published in:
  • Colloids and Surfaces A: Physicochemical and Engineering Aspects. - 2009, vol. 337, no. 1-3, p. 91-95
Mono-carboxylic acids
Ferrofluids stabilization
Small-angle neutron scattering
Nematic attraction
English 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, for stearic acid the attractive component is higher than the repulsive one; this results in a shift of the transition into the liquid crystalline state (because of molecule anisotropy) towards smaller concentrations and could explain early data on worse stabilization properties of stearic acid in ferrofluids compared to oleic and myristic acids.
Faculty
Faculté des sciences et de médecine
Department
AMI - Soft Nanoscience
Language
  • English
Classification
Physics
License
License undefined
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Persistent URL
https://folia.unifr.ch/unifr/documents/301178
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