Aligned Silver Nanoparticles on Rippled Silicon Templates Exhibiting Anisotropic Plasmon Absorption
Aligned silver nanoparticles, grown by combining two simple bottom-up techniques, are reported. Physical vapor-deposited silver adatoms are shown to form nanoparticles preferentially in the valleys of rippled silicon templates prepared by low-energy ion bombardment. A 35-nm ripple periodicity produced highly aligned structures with a 0.21 eV polarization-dependent shift in the plasmon resonance peak. The speed and simplicity of the method is viable for cost-effective, large-scale production of mesoscale aligned nanostructures with adjustable periodicity.
Key wordsSelf-organization Self-alignment Plasmon coupling SERS Island films
TWHO was supported during this work by a Marie Curie International Incoming Fellowship from the European Commission. Our thanks go to E. Christalle for SEM images.
- 2.Brune H (1998) Microscopic view of epitaxial metal growth: nucleation and aggregation. Surf Sci Rep 31:121–229Google Scholar
- 6.Doremus RH, Rao P (1996) Optical properties of nanosized gold particles. J Mater Res 11(11):2834–2840Google Scholar
- 13.Kreibig U, Vollmer M (1995) Optical properties of metal clusters. Springer, BerlinGoogle Scholar