Combined scanning electrochemical microscopy–Langmuir trough technique for investigating phase transfer kinetics across liquid/liquid interfaces modified by a molecular monolayer

摘要: Abstract The first combination of scanning electrochemical microscopy (SECM) with a Langmuir trough for liquid/liquid interfaces is described. technique has been examined and demonstrated through investigations the effect monolayers l -α-phosphatidylcholine, distearoyl (DSPC) on kinetics oxygen transfer from decane to water. stability monolayers, formed in this way, timescale SECM measurements identified as function compression speed subphase composition. Monolayers were stable over wide range pressures molecular areas, but at high decrease surface pressure time was observed. This attributed desorption lipid interface. In situation, it possible perform (tip-interface approach curves) rapidly under control, without causing significant disturbance monolayer. DSPC had no detectable when monolayer liquid-expanded phase, liquid-condensed phase rate