TY - JOUR 
A1 - Pellacani, Paola
AU - Morasso, Carlos
AU - Picciolini, Silvia
AU - Gallach Pérez, Darío
AU - Fornasari, Lucía
AU - Marabelli, Franco
AU - Manso Silvan, Miguel
T1 - Plasma Fabrication and SERS Functionality of Gold Crowned Silicon Submicrometer Pillars
Y1 - 2020
SN - 1996-1944
UR - http://hdl.handle.net/11268/11224
AB - Sequential plasma processes combined with specific lithographic methods allow for the fabrication of advanced material structures. In the present work, we used self-assembled colloidal monolayers as lithographic structures for the conformation of ordered Si submicrometer pillars by reactive ion etching. We explored different discharge conditions to optimize the Si pillar geometry. Selected structures were further decorated with gold by conventional sputtering, prior to colloidal monolayer lift-off. The resulting structures consist of a gold crown, that is, a cylindrical coating on the edge of the Si pillar and a cavity on top. We analysed the Au structures in terms of electronic properties by using X-ray absorption spectroscopy (XAS) prior to and after post-processing with thermal annealing at 300 °C and/or interaction with a gold etchant solution (KI). The angular dependent analysis of the plasmonic properties was studied with Fourier transformed UV-vis measurements. Certain conditions were selected to perform a surface enhanced Raman spectroscopy (SERS) evaluation of these platforms with two model dyes, prior to confirming the potential interest for a well-resolved analysis of filtered blood plasma.
KW - Materiales de construcción
KW - Elemento estructural (construcción)
KW - Física del plasma
LA - eng
ER -