title: Gold Nanowire Forests for SERS Detection.
abstract: Simple wet chemistry has been applied to control the vertical growth of gold nanowires on a glass substrate. As a consequence, the longitudinal localized surface plasmon band position can be tuned from 656 to 1477 nm in a few minutes by simply controlling the growth rate and time. This allowed us to select the optimum conditions for maximum electromagnetic enhancement and performance in surface enhanced Raman scattering (SERS) detection. SERS measurements confirmed the uniform and reproducible distribution of the nanowires on the substrate, with the subsequent high reproducibility of hot spot formation. Detection of malachite green in water and of 1-naphthalenethiol from the gas phase are demonstrated as proof-of-concept applications of these three-dimensional SERS substrates.
authors.affiliation: Bionanoplasmonics Laboratory, CIC biomaGUNE Paseo de Miramón 182, 20009 Donostia-San Sebastián (Spain) E-mail: llizmarzan@cicbiomagune.es.
authors.forename: Andrea
authors.initials: A
authors.lastname: La Porta
authors.affiliation: Bionanoplasmonics Laboratory, CIC biomaGUNE Paseo de Miramón 182, 20009 Donostia-San Sebastián (Spain) E-mail: llizmarzan@cicbiomagune.es ; Ikerbasque, Basque Foundation for Science 48011 Bilbao (Spain).
authors.forename: Marek
authors.initials: M
authors.lastname: Grzelczak
authors.affiliation: Bionanoplasmonics Laboratory, CIC biomaGUNE Paseo de Miramón 182, 20009 Donostia-San Sebastián (Spain) E-mail: llizmarzan@cicbiomagune.es ; Ikerbasque, Basque Foundation for Science 48011 Bilbao (Spain).
authors.forename: Luis M
authors.initials: LM
authors.lastname: Liz-Marzán
keywords: gold; molecular sensors; nanowires; plasmonics; surface enhanced Raman scattering; ultradetection