Breaking the symmetry of nanosphere lithography with anisotropic plasma etching induced by temperature gradients
Daniel Darvill, Marzia Iarossi, Ricardo Martín Abraham-Ekeroth, Aliaksandr Hubarevich, Jian‐An Huang, Francesco De Angelis
Abstract
the temperature gradient and etching time, or the spheres' size. We show that PS mushroom arrays can be used as nanostructured templates to fabricate plasmonic arrays, such as gold-capped nano mushrooms and ultra-small nanoapertures, by using vertical and oblique gold sputtering deposition respectively. PE-TG reveals a new, cheap and facile approach to produce plasmonic nanostructures of great interest in the fields of molecular sensing, surface-enhanced Raman scattering (SERS), energy harvesting and optoelectronics. We study the optical properties of the Au-capped nano mushroom arrays and their performance as biosensing platforms by performing SERS measurements.