SELF-ASSEMBLED NANOSTRUCTURES OF A BOLAAMPHIPHILIC DIACID IN THE SPREAD LANGMUIR FILM ON THE AQUEOUS SUBPHASE CONTAINING LANTHANUM ION

摘要

The spreading behavior of a bolaamphiphilic diacid (1,18-octadecanedicarboxylic acid, ODA) on an aqueous subphase containing lanthanum chloride was investigated. ODA formed a multilayer film on the subphase, and flower- or ring-like nanoarchitectures were observed by an AFM measurement on the transferred one-layer film. It was found that while the above exotic nanostructures were formed in the spreading films at lower concentration of La~(3+) ion, only aggregated circular nanoparticles were observed for those on a higher concentration of La~(3+) ion.