title: Thin nanocomposite films of polyaniline/Au nanoparticles by the Langmuir-Blodgett technique.
abstract: The Langmuir-Blodgett (LB) method was used to deposit multilayers of polyaniline (PANI)- and mercaptoethanesulfonate (MES)-stabilized Au nanoparticles. The electrostatic interaction between the negatively charged nanoparticles in the subphase and the positively charged PANI at the air-water interface assisted the deposition of the nanocomposite film onto a solid support. These PANI/Au-NPs films were characterized using cyclic voltammetry, copper under potential deposition, scanning electron microscopy, atomic force microscopy, and X-ray photoelectron spectroscopy. We found that the nanocomposite layers were uniform and reproducible. The density of Au-NPs in the monolayer depended on the acidity of the subphase as well as on the nanoparticles concentration. Moreover, the Au-NPs extrude above the PANI and therefore could be used as nanoelectrodes for the underpotential deposition (UPD) of copper.
authors.affiliation: Institute of Chemistry, The Hebrew University of Jerusalem, 91904 Jerusalem, Israel.
authors.forename: Golan
authors.initials: G
authors.lastname: Tanami
authors.forename: Vitaly
authors.initials: V
authors.lastname: Gutkin
authors.forename: Daniel
authors.initials: D
authors.lastname: Mandler