Lm. Bronstein et al., Metal colloid formation in the complexes of polyelectrolyte gels with oppositely charged surfactants, COLL SURF A, 147(1-2), 1999, pp. 221-231
Citations number
25
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
The interaction of Pt, Au and Ni ions with the complexes of cationic gel of
polydiallyldimethylammonium chloride (PDADMACl) with two anionic surfactan
ts: sodium dodecyl sulfate (SDS) and sodium dodecylbenzenesulphonate (SDBS)
was investigated. After reduction of metal compounds by hydrazine-hydrate
or sodium borohydride, colloidal particles of Pt, Au and Ni embedded in the
body of the hydrogel were formed. It was found by small-angle X-ray scatte
ring (SAXS) that when the PDADMACl/SDS complexes interact with metal ions,
the nanostructures are disturbed and the degree of disordering depends on t
he type of metal compound. PDADMACl/SDBS complexes seem to be more stable t
owards metal ion incorporation. By SEM and AFM data it was shown that gold
colloid formation is controlled by the ordering in the PDADMACl/SDS complex
which prevents the aggregation of metal colloids. (C) 1999 Elsevier Scienc
e B.V. An rights reserved.