title: Plasmon-mediated chemical surface functionalization at the nanoscale.
abstract: Controlling the surface grafting of species at the nanoscale remains a major challenge, likely to generate many opportunities in materials science. In this work, we propose an original strategy for chemical surface functionalization at the nanoscale, taking advantage of localized surface plasmon (LSP) excitation. The surface functionalization is demonstrated through aryl film grafting (derived from a diazonium salt), covalently bonded at the surface of gold lithographic nanostripes. The aryl film is specifically grafted in areas of maximum near field enhancement, as confirmed by numerical calculation based on the discrete dipole approximation method. The energy of the incident light and the LSP wavelength are shown to be crucial parameters to monitor the aryl film thickness of up to ∼30 nm. This robust and versatile strategy opens up exciting prospects for the nanoscale confinement of functional layers on surfaces, which should be particularly interesting for molecular sensing or nanooptics.
authors.affiliation: Interfaces, Traitements, Organisation et Dynamique des Systèmes, Université Paris Diderot, Sorbonne Paris Cité, CNRS UMR 7086, 15 rue Jean-Antoine de Baïf, 75205 Paris Cedex 13, France. mangeney@univ-paris-diderot.fr nordin.felidj@univ-paris-diderot.fr.
authors.forename: Mai
authors.initials: M
authors.lastname: Nguyen
authors.forename: Aazdine
authors.initials: A
authors.lastname: Lamouri
authors.forename: Chrystelle
authors.initials: C
authors.lastname: Salameh
authors.forename: Georges
authors.initials: G
authors.lastname: Lévi
authors.forename: Johan
authors.initials: J
authors.lastname: Grand
authors.forename: Leïla
authors.initials: L
authors.lastname: Boubekeur-Lecaque
authors.forename: Claire
authors.initials: C
authors.lastname: Mangeney
authors.forename: Nordin
authors.initials: N
authors.lastname: Félidj