F. Saremi et al., SELF-ASSEMBLED ALTERNATING MULTILAYERS BUILT-UP FROM DIACETYLENE BOLAAMPHIPHILES AND POLY(ALLYLAMINE HYDROCHLORIDE) - POLYMERIZATION PROPERTIES, STRUCTURE, AND MORPHOLOGY, Langmuir, 11(4), 1995, pp. 1068-1071
A study of the polymerization properties and the morphology of a new t
ype of ultrathin diacetylene multilayers is presented. The multilayers
were built-up on charged surfaces by alternating self-assembly of dip
olar amphiphilic diacetylenes (2,4-hexadiyne 1,6-disulfate (HDDS), 5,7
-dodecadiyne 1,12-disulfate (DDDS), 10,12-docosadiyne 1,22-disulfate (
DCDS)) and a cationic polyelectrolyte (polyallylamine hydrochloride) f
rom aqueous solution. Upon UV- and gamma-irradiation, the multilayers
containing DCDS dianions polymerized. X-ray studies indicate a layered
structure with a layer thickness of 2.7 +/- 0.1 nm. The DCDS dianions
are tilted by 38 +/- 4 degrees with regard to the layer plane. The mo
rphological study by scanning force microscopy indicates that the mult
ilayers do not represent a homogeneous film but consist of a multitude
of small, separate domains of up to 300 nm in diameter covering the s
ubstrate in a way that the macroscopic appearance is fairly regular an
d homogeneous.