Accession Number : ADA183530

Title :   Palladium in Non-Aqueous Solvents. Formation, Stability, and Film Forming Properties.

Descriptive Note : Technical rept.,

Corporate Author : KANSAS STATE UNIV MANHATTAN DEPT OF CHEMISTRY

Personal Author(s) : Cardenas-Trivino,Galo ; Klabunde,Kenneth J ; Dale,Brock

PDF Url : ADA183530

Report Date : 14 Jul 1987

Pagination or Media Count : 32

Abstract : Palladium atoms in cold acetone, ethanol, and other organic solvents cluster to form living colloidal particles. The Pd colloids are stable for months at room temperature in acetone, and their particle sizes (about 8 nm) vary slightly according to solvent: Pd ratio, and warming procedures. The particles are stabilized by both steric stabilization (solvation) and by incorporation of negative charge. They are living in the sense that production of larger particles and films can be accomplished simply by solvent removal. The Pd films at room temperature by solvent evaporation have semiconductor properties (rather than metal like conductivity) due to the incorporation of substantial portions of organic solvent (and small amounts of solvent fragments). Upon heat treatment the films become smoother, give up organic solvent, and resistivity decreases. These are the first examples of non-aqueous Pd colloids, and the first examples of film formation from such colloidal solutions. Keywords: Free atoms, Solvated, Nonaqueous colloids, Metal particles, Clustering, Electrophoresis, Living colloids, Palladium, Films.

Descriptors :   *PALLADIUM, *COLLOIDS, *FILMS, *ORGANIC SOLVENTS, SYNTHESIS(CHEMISTRY), FLOCCULATION, INFRARED SPECTROSCOPY, POLYMERIC FILMS, ACETONES, CLUSTERING, ELECTROPHORESIS, EVAPORATION, FRAGMENTS, HEAT TREATMENT, HEATING, LOW TEMPERATURE, METALS, NONAQUEOUS ELECTROLYTES, PARTICLE SIZE, PARTICLES, RATIOS, REMOVAL, ROOM TEMPERATURE, SEMICONDUCTORS, SOLVATION, SOLVENTS

Subject Categories : Inorganic Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE