Size-dependence of surface plasmon resonance and oxidation for Pd nanocubes synthesized via a seed etching process

Pd nanocubes between 8 and 50 nm in size were synthesized at the same concentration of Na 2PdCl 4 precursor by controlling the number of seeds formed in the nucleation stage. Increasing the concentration of FeCl 3, an oxidative etchant for Pd, reduced the number of seeds and led to formation of larger Pd nanocubes. The larger nanocubes exhibited surface plasmon resonance peaks in the visible region, the locations of which matched with the results of the discrete dipole approximation calculation. While the nanocubes of 25 and 50 nm in size oxidized in air to form Pd@PdO core-shell structures, the 8-nm nanocubes were stable in air for over 90 days. © 2005 American Chemical Society.

Full Text

Duke Authors

Cited Authors

  • Xiong, Y; Chen, J; Wiley, B; Xia, Y; Yin, Y; Li, ZY

Published Date

  • 2005

Published In

Volume / Issue

  • 5 / 7

Start / End Page

  • 1237 - 1242

International Standard Serial Number (ISSN)

  • 1530-6984

Digital Object Identifier (DOI)

  • 10.1021/nl0508826