Salt Formation in the Langmuir-Blodgett Films of Arachidic Acid Mixed with Amphiphilic Ammonium Ions and an Amphiphilic Amine

In the Langmuir-Blodgett (LB) films of arachidic acid (AA) mixed with amphiphilic ammonium ions or an amphiphilic amine, AA was mixed with the second component at the molecular level and formed salt when the fraction of AA was not larger than 0.5. Further the fraction of the second component in the mixed LB films was smaller than that in the spreading solution with the fraction of the second component larger than 0.5.