AVS 51st International Symposium
    Surface Science Tuesday Sessions
       Session SS-TuP

Paper SS-TuP23
The Development of Pd and Ag Nanoparticles with Pulsed Laser Deposition

Tuesday, November 16, 2004, 4:00 pm, Room Exhibit Hall B

Session: Poster Session
Presenter: C.E. Allmond, University of Virginia
Authors: C.E. Allmond, University of Virginia
J.M. Howe, University of Virginia
V.P. Oleshko, University of Virginia
J.M. Fitz-Gerald, University of Virginia
Correspondent: Click to Email
Small particles in the 1-100 nm range often exhibit significant properties that are promising for various practical applications, such as catalysis, electronics, imaging systems, etc. Therefore, it is important to develop preparation methods that are simple, effective and flexible in controlling particle size distributions. The development of novel materials has grown considerably with the introduction of nanoscale processing. A wide range of synthetic approaches regarding the preparation of metal nanoparticles in various matrices and at the surfaces, including reduction, sol-gel precipitation, solvent evaporation of hydrophobic colloids, cross-linking in colloidal aggregates, templates-directed methods, and biopolymer superstructures, has been reported. As an alternative, pulsed laser deposition is a novel preparation method. Palladium and silver nanoparticles, with sizes ranging from 1-10 nm, were deposited onto transmission electron microscope grids using pulsed laser deposition. Analysis of these nanoparticles incorporated high-resolution transmission electron microscopy, electron energy loss spectroscopy (EELS), and electron dispersion spectroscopy (EDS). The rationale behind this is two-fold: (1) is to obtain mean particle size and crystal structure as a function of fluence, gas pressure, and gas type and (2) is to establish parameters for site-specific catalysts.