Metallic Nanodot Arrays.
Stencil Lithography
Metallic Nanodot Arrays by Stencil Lithography for Plasmonic Biosensing Applications.
The group of Prof. Jürgen Brugger (LMIS1 - Microsystems Laboratory 1) - in collaboration with researchers of ETHZ - present the fabrication of gold nanodots by stencil lithography and its application for optical biosensing based on localized surface plasmon resonance. Arrays of 50−200 nm wide nanodots with different spacing of 50−300 nm are fabricated without any resist, etching, or lift-off process. Bulk refractive index measurements and model biosensing of streptavidin were successfully performed based on the plasmon resonance shift induced by local refractive index change when biomolecules are adsorbed on the nanodots. These results demonstrate the potential of stencil lithography for the realization of plasmon-based biosensing devices.
Oscar Vazquez-Mena et al., ACS Nano, DOI: 10.1021/nn101925 (2011)