S. Shiratori et T. Ito, Formation of ultra-thin organic films by micelle-wrapping sequential adsorption method, IEICE TR EL, E83C(7), 2000, pp. 1094-1098
Layer-by-layer sequential adsorption process of polyelectrolytes had conven
tionally been used for the fabrication of the ultra-thin organic film forme
d by various polymers with different polarity of charge. In this study, hyd
rophobic Ruthenium complex monomer (tris (bilyridyl) ruthenium (II) hexaflu
orophosphate) was micelle-wrapped with an anionic surfactant, sodium dodecy
lbenzenesulfonate, and was assembled with PAH (poly (allylamine hydrochlori
de)) which has the opposite charge on ITO substrates. With this method, we
succeed in Fabricating ultra-thin organic films even when the adsorption ma
terial is not polymer but monomer. Moreover it was found that the bilayer t
hickness of the self-assembled (Ru micelle/PAH) was systematically changed
by adjusting the solution pH of each bath. By using this process, EL device
was fabricated by depositing the thin film of micelle-wrapping ruthenium c
omplex monomer on ITO and formed Bi electrode on top of the film. Light emi
ssion was observed by applying voltage to this device.