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Proceedings Paper

Metal enhanced fluorescence using nanostructures on silver formed with Ti: Saphire femtosecond pulsed laser
Author(s): Vicente S. Mattos; Fernanda R. Paolillo; Daniel Cavallini; Marcelo A. Pereira-da-Silva; Marco A. A. de Souza; Fatima M. M. Yasuoka; Francisco E. G. Guimarães; Jarbas C. de Castro Neto
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Paper Abstract

Metal enhanced fluorescence is a phenomenon that occurs when a fluorophore is positioned near a conductive structure. Structures can be formed by the interaction of high-energy laser with a sample, on which the femtosecond laser pulses interact with the surface without heat effects. This work aims to study nanostructure formation in polished bulk silver, in order to amplify signals of fluorescence. A Titanium-sapphire femtosecond laser was used to mark silver surfaces. SEM images shows nanostructures formed in chaotic agglomerate of nanospheres with size of 50-800nm. Using Protoporphyrin-IX, the fluorescence amplification was around 300 times compared to a surface without the nanostructures.

Paper Details

Date Published: 2 March 2020
PDF: 7 pages
Proc. SPIE 11268, Laser-based Micro- and Nanoprocessing XIV, 1126822 (2 March 2020); doi: 10.1117/12.2545963
Show Author Affiliations
Vicente S. Mattos, Univ. São Paulo (Brazil)
Fernanda R. Paolillo, Univ. São Paulo (Brazil)
Daniel Cavallini, Univ. São Paulo (Brazil)
Marcelo A. Pereira-da-Silva, Univ. São Paulo (Brazil)
Marco A. A. de Souza, Univ. São Paulo (Brazil)
Fatima M. M. Yasuoka, Univ. São Paulo (Brazil)
Univ. Paulista (Brazil)
Francisco E. G. Guimarães, Univ. São Paulo (Brazil)
Jarbas C. de Castro Neto, Univ. São Paulo (Brazil)

Published in SPIE Proceedings Vol. 11268:
Laser-based Micro- and Nanoprocessing XIV
Udo Klotzbach; Akira Watanabe; Rainer Kling, Editor(s)

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