Next Article in Journal
Potential of Oil Palm Empty Fruit Bunch Resources in Nanocellulose Hydrogel Production for Versatile Applications: A Review
Previous Article in Journal
Effective Medium Theory for the Elastic Properties of Composite Materials with Various Percolation Thresholds
Previous Article in Special Issue
Applications of Plasma-Liquid Systems: A Review
Open AccessFeature PaperArticle

Plasma Fabrication and SERS Functionality of Gold Crowned Silicon Submicrometer Pillars

Departamento de Física Aplicada and Instituto de Ciencia de Materiales Nicolás Cabrera, Universidad Autónoma de Madrid, 28049 Madrid, Spain
Plasmore S.r.l., Via Vittorio Emanuele II 4, 27100 Pavia, Italy
Istituti Clinici Scientifici Maugeri IRCCS, via Maugeri 4, 27100 Pavia, Italy
IRCCS Fondazione Don Carlo Gnocchi, Via Capecelatro 66, 20148 Milano, Italy
Departamento de Ciencia, Computación y Tecnología, Universidad Europea de Madrid, 28670 Villaviciosa de Odón, Madrid, Spain
Physics Department, University of Pavia. via A.Bassi, 6. I-27100, Pavia, Italy
Author to whom correspondence should be addressed.
Materials 2020, 13(5), 1244;
Received: 10 February 2020 / Revised: 3 March 2020 / Accepted: 5 March 2020 / Published: 10 March 2020
(This article belongs to the Special Issue Plasma Surface Engineering of Materials)
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. View Full-Text
Keywords: SERS; Si pillars; reactive ion etching; gold nanostructures; sputtering; XAS SERS; Si pillars; reactive ion etching; gold nanostructures; sputtering; XAS
Show Figures

Figure 1

MDPI and ACS Style

Pellacani, P.; Morasso, C.; Picciolini, S.; Gallach, D.; Fornasari, L.; Marabelli, F.; Manso Silvan, M. Plasma Fabrication and SERS Functionality of Gold Crowned Silicon Submicrometer Pillars. Materials 2020, 13, 1244.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

Search more from Scilit
Back to TopTop