title: Synthesis of Janus plasmonic-magnetic, star-sphere nanoparticles, and their application in SERS detection.
abstract: Multicomponent nanoparticles are of particular interest due to a unique combination of properties at the nanoscale, which make them suitable for a wide variety of applications. Among them, Janus nanoparticles, presenting two distinct surface regions, can lead to specific interactions with interfaces, biomolecules, membranes etc. We report the synthesis of Janus nanoparticles comprising iron oxide nanospheres and gold nanostars, through two consecutive seed-mediated-growth steps. Electron tomography combining HAADF-STEM and EDX mapping has been performed to evaluate the spatial distribution of the two components of the nanoparticle, showing their clear separation in a Janus morphology. Additionally, SERS measurements assisted by magnetic separation were carried out to assess the application of combined plasmonic and magnetic properties for sensing.
authors.affiliation: CIC biomaGUNE, Paseo de Miramon 182, 20009 Donostia-San Sebastián, Spain. jreguera@cicbiomagune.es.
authors.forename: Javier
authors.initials: J
authors.lastname: Reguera
authors.forename: Dorleta
authors.initials: D
authors.lastname: Jiménez de Aberasturi
authors.forename: Naomi
authors.initials: N
authors.lastname: Winckelmans
authors.forename: Judith
authors.initials: J
authors.lastname: Langer
authors.forename: Sara
authors.initials: S
authors.lastname: Bals
authors.forename: Luis M
authors.initials: LM
authors.lastname: Liz-Marzán