Gold Nanocages: Engineering Their Structure for Biomedical Applications (pages 2255–2261)
J. Chen, B. Wiley, Z.-Y. Li, D. Campbell, F. Saeki, H. Cang, L. Au, J. Lee, X. Li and Y. Xia
Version of Record online: 29 JUL 2005 | DOI: 10.1002/adma.200500833
Hollow Au nanostructures (see Figure) have been synthesized by the galvanic replacement reaction between a Ag template and HAuCl4 so that their surface plasmon resonance peaks can be continuously tuned from 400 to 1200 nm. The Au nanostructures, with extraordinarily large cross-sections for both absorption and scattering, are expected to find uses as both contrast agents for optical imaging in early-stage tumor detection and as therapeutic agents for photothermal cancer treatment.