Interaction of magnetic nanoparticles with phospholipid films adsorbed at a liquid/liquid interface

C.I. CÁMARA; L.M.A. MONZÓN; J.M.D. COEY; LIDIA MABEL YUDI

ROYAL SOC CHEMISTRY

Lugar: CAMBRIDGE; Año: 2015 vol. 17 p. 414 - 414

he interaction of Co hexagonal magnetic nanoparticles (MNPs) with disteroyl phosphatidyl glycerol (DSPG) and distearoyl phosphatidic acid (DSPA) films adsorbed at a water / 1,2-dichloroethane interface is studied employing cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), capacity curves and interfacial pressure ? area isotherms. DSPA and DSPG adsorb at the interface forming homogenous films and producing a blocking effect on the transfer process of tetra ethyl ammonium (TEA+), used as probe cation. In the presence of Co NPs this effect is reversed and the reversible transfer process for TEA+ is reestablished, in greater or lesser extent depending on the structuration of the film. Co-DSPA hybrid films have a homogeneous structure while Co-DSPG films present different domains. Moreover, the presence of Co on DSPA film modifies the partition coefficient of the organic electrolyte into the hydrocarbon layer.