Preparation and spectral characteristics of gold particles in Langmuir- Blodgett films

Abstract

Langmuir-Blodgett films incorporating complex ions of gold(III) have been fabricated from air-water monolayers of arachidic acid, dimethyldioctadecylammonium bromide and dihexadecyl phosphate. The films, and their reactions with reducing agents to produce colloidal gold particles, have been characterised by surface pressure/area per molecule (n-A) isotherms, UV-vis. and XPS spectroscopy, atomic force microscopy (AFM) and transmission electron microscopy (TEM). Colloidal gold particles, produced in films exposed to carbon monoxide, were examined by AFM and TEM. The gold particles, as determined by TEM, were of a mean size of 10 nm and were randomly distributed in the films. Solvent immersion ..