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Updated: May 7, 2026
A Method to Fabricate Disconnected Silver Nanostructures in 3D
Published on: November 27, 2012
3D nano-structures for laser nano-manipulation
Gediminas Seniutinas1, Lorenzo Rosa, Gediminas Gervinskas
1Centre for Micro-Photonics, Faculty of Engineering and Industrial Sciences, Swinburne University of Technology, Hawthorn, VIC 3122, Australia ; The Australian National Fabrication Facility - ANFF, Victoria node, Faculty of Engineering and Industrial Sciences, Swinburne University of Technology, Hawthorn, VIC 3122, Australia.
Abstract:
The resputtering of gold films from nano-holes defined in a sacrificial PMMA mask, which was made by electron beam lithography, was carried out with a dry plasma etching tool in order to form well-like structures with a high aspect ratio (height/width ≈ 3-4) at the rims of the nano-holes. The extraordinary transmission through the patterns of such nano-wells was investigated experimentally and numerically. By doing numerical simulations of 50-nm and 100-nm diameter polystyrene beads in water and air, we show the potential of such patterns for self-induced back-action (SIBA) trapping. The best trapping conditions were found to be a trapping force of 2 pN/W/μm(2) (numerical result) exerted on a 50-nm diameter bead in water. The simulations were based on the analytical Lorentz force model.
