Shape-Controlled Synthesis of Pd Nanocrystals inAqueous Solutions

Journal Article · Fri Jan 23 04:00:00 EST 2009 · Advanced Functional Materials

DOI:https://doi.org/10.1002/adfm.200801439· OSTI ID:970411

Lim, B; Tao, J

This article provides an overview of recent developments regarding synthesis of Pd nanocrystals with well-controlled shapes in aqueous solutions. In a solution-phase synthesis, the final shape taken by a nanocrystal is determined by the twin structures of seeds and the growth rates of different crystallographic facets. Here, the maneuvering of these factors in an aqueous system to achieve shape control for Pd nanocrystals is discussed. L-ascorbic acid, citric acid, and poly(vinyl pyrrolidone) are tested for manipulating the reduction kinetics, with citric acid and B-ions used as capping agents to selectively promote the formation of {111} and {100} facets, respectively. The distribution of single-crystal versus multiple-twinned seeds can be further manipulated by employing or blocking oxidative etching. The shapes obtained for the Pd nanocrystals include truncated octahedron, icosahedron,octahedron, decahedron, hexagonal and triangular plates, rectangular bar, and cube. The ability to control the shape of Pd nanocrystals provides a great opportunity to systematically investigate their catalytic, electrical, and plasmonic properties.

• Research Organization: Brookhaven National Laboratory (BNL) Transmission Electron Microscope
• Sponsoring Organization: Doe - Office Of Science
• DOE Contract Number: AC02-98CH10886
• OSTI ID: 970411
• Report Number(s): BNL--90124-2009-JA; KC0201010
• Journal Information: Advanced Functional Materials, Journal Name: Advanced Functional Materials Journal Issue: 2 Vol. 19; ISSN 1616-301X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AQUEOUS SOLUTIONS
CITRIC ACID
Cuprate films
Interface superconductivity
DISTRIBUTION
ETCHING
KINETICS
PLATES
SEEDS
SHAPE
SYNTHESIS