28 August 2015 Engineered/tailored nanoporous gold structures for infrared plasmonics
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Abstract
Nanoporous gold is a very promising and novel material platform for mid-infrared and THz plasmonics. Nanoporous gold can be formed by dealloying of Au–Ag alloys, previously grown by means of Ag-Au co-sputtering. The optical response is completely determined by the nanostructural film features, that depends on the initial alloy composition and on the preparation procedure. The behavior of the material in mid-infrared and its peculiar morphology with a very high surface/volume ratio can be applied for nanostructure fabrication, such for example nanoantennas. Here we report the design and fabrication of nanoporous antennas engineered to support resonances in the 1500-1700 cm-1 range where them can be exploited, for example, in the detection of protein conformational states. This novel paradigm points toward the development of a new class of efficient and high-selective biosensors.
Conference Presentation
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Denis Garoli, Denis Garoli, Eugenio Calandrini, Eugenio Calandrini, Sandro Cattarin, Sandro Cattarin, Simona Barison, Simona Barison, Pierfrancesco Zilio, Pierfrancesco Zilio, Angelo Bozzola, Angelo Bozzola, Andrea Toma, Andrea Toma, Francesco De Angelis, Francesco De Angelis, } "Engineered/tailored nanoporous gold structures for infrared plasmonics", Proc. SPIE 9547, Plasmonics: Metallic Nanostructures and Their Optical Properties XIII, 95470K (28 August 2015); doi: 10.1117/12.2186562; https://doi.org/10.1117/12.2186562
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