Gold Hollow Nanostructures: Synthesis and Optical Properties
EMSL Project ID
21391
Abstract
Nanostructures of noble metals have received considerable attention in recent years due to their wide range of applications, including catalysis, optics, biological imaging, and surface-enhanced Raman scattering. Gold nanostructures are of particular interest owing to the bio-compatibility and strong surface plasmon resonance (SPR). By controlling the shape, size, structure (solid vs. hollow), composition, and crystallinity, tunable optical properties can be readily achieved for gold nanostructures.The purpose of this research is to synthesize gold hollow nanostructures with tunable optical properties by galvanic replacement reaction. Silver nanoparticles with size less than 20 nm will be synthesized using various approaches. Galvanic replacement reaction of the Ag nanoparticles with HAuCl4 solution will be performed to produce Au/Ag alloy nanoboxes and Au nanocages with red-shifted extinction spectra. UV-vis-NIR extinction spectra for the nanostructures at different reaction stages will be measured, and the peaks of the spectra will be tuned to the NIR region for potential biomedical applications. HRTEM facility at the PNNL will be used to analyze the crystallinity of the particles and its effect on the formation of hollow nanostructures during the replacement reaction.
Project Details
Project type
Exploratory Research
Start Date
2006-08-22
End Date
2007-08-22
Status
Closed
Released Data Link
Team
Principal Investigator