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Proceedings Paper

Nanoporous gold leaves: preparation, optical characterization, and biosensing capabilities
Author(s): Gianluca Ruffato; Denis Garoli; Eugenio Calandrini; Pierfrancesco Zilio; Francesco De Angelis; Filippo Romanato; Sandro Cattarin
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Paper Abstract

The preparation, optical characterization and plasmonic biosensing properties of self-standing nanoporous gold leaves are presented. Respect to the bulk gold, the material shows metallic behaviour at higher wavelengths and a lower imaginary part of the dielectric constants. The plasmonic properties in the near infrared range have been investigated probing the resonance shift after a self-assembling monolayer functionalization. Due to a great increase of the active surface the presence of an organic molecule adsorbed on its surface leads to important optical responses. This demonstrates how nanoporous gold reveals benefits for better reaction efficiency and detection sensitivity and how plasmonic properties in the near-IR range can assure employment in plasmonic devices.

Paper Details

Date Published: 28 August 2015
PDF: 6 pages
Proc. SPIE 9547, Plasmonics: Metallic Nanostructures and Their Optical Properties XIII, 954737 (28 August 2015); doi: 10.1117/12.2188076
Show Author Affiliations
Gianluca Ruffato, Univ. of Padova (Italy)
Denis Garoli, Istituto Italiano di Tecnologia (Italy)
Eugenio Calandrini, Istituto Italiano di Tecnologia (Italy)
Pierfrancesco Zilio, Istituto Italiano di Tecnologia (Italy)
Francesco De Angelis, Istituto Italiano di Tecnologia (Italy)
Filippo Romanato, Univ. of Padova (Italy)
Sandro Cattarin, CNR-IENI (Italy)

Published in SPIE Proceedings Vol. 9547:
Plasmonics: Metallic Nanostructures and Their Optical Properties XIII
Allan D. Boardman; Din Ping Tsai, Editor(s)

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