Au-Ag alloy nanoporous nanotubes
- 1.3k Downloads
Metallic nanostructures with hollow interiors or tailored porosity represent a special class of attractive materials with intriguing chemicophysical properties. This paper presents the fabrication of a new type of metallic nanoporous nanotube structure based on a facile and effective combination of nanocrystal growth and surface modification. By controlling the individual steps involved in this process, such as nanowire growth, surface modification, thermal diffusion, and dealloying, one-dimensional (1-D) metallic nanostructures can be prepared with tailored structural features and pre-designed functionalities. These tubular and porous nanostructures show distinct optical properties, such as tunable absorption in the near-infrared region, and enhanced capability for electrochemiluminescence signal amplification, which make them particularly desirable as novel 1-D nanocarriers for biomedical, drug delivery and sensing applications.
KeywordsNanoporous nanotube gold optical properties electrochemiluminescence
- Hirsch, L. R.; Stafford, R. J.; Bankson, J. A.; Sershen, S. R.; Rivera, B.; Price, R. E.; Hazle, J. D.; Halas, N. J.; West, J. L. Nanoshell-mediated near-infrared thermal therapy of tumors under magnetic resonance guidance. Proc. Natl. Acad. Sci. USA 2003, 100, 13549–13554.CrossRefPubMedADSGoogle Scholar
- Sun, Y.; Xia, Y. Multiple-walled nanotubes made of metals. Adv. Mater. 2004, 16, 264 268.Google Scholar
- Murphy, C. J.; Sau, T. K.; Gole, A.; Orendorff, C. J. Surfactant-directed synthesis and optical properties of one-dimensional plasmonic metallic nanostructures. MRS Bull. 2005, 30, 349–355.Google Scholar
- Volkert, C. A.; Lilleodden, E. T.; Kramer, D.; Weissmüller, J. Approaching the theoretical strength in nanoporous Au. Appl. Phys. Lett. 2006, 89, 061920.Google Scholar