Nanoantenna as a plasmonic molecular sensor with multi selective detection zones

Dan Lis, Yves Caudano, Marie Henry, Sophie Demoustier-Champagne, Etienne Ferain, Francesca Cecchet

Research output: Contribution in Book/Catalog/Report/Conference proceedingConference contribution


Metallic nanostructures such as nanoantennas are capable of confining the energy of an incident radiation into volumes much smaller than the wavelength of incoming waves through localized surface plasmon resonance (LSPR). Here, we report on a strong enhancement of the vibrational signal from molecules adsorbed on metallic nanoantennas when those latter are excited at their LSPR frequencies. Because nanoantennas possess two plasmon modes with different directional profiles, it is likely possible to selectively probe the molecules adsorbed onto the nanoantenna side wall, on the nanoantenna top part or on the flat region of the substrate in-between antennas. This work gives promising perspectives to set-up a label-free vibrational biosensing platform with a multi-zones selectivity and a plasmon-enhanced sensitivity that could deserve diagnosis or surface molecular analysis.
Original languageEnglish
Title of host publicationNANOCON 2013 - Conference Proceedings, 5th International Conference
Publication statusPublished - 2013

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