title: Highly sensitive and simple SERS substrate based on photochemically generated carbon nanotubes-gold nanorods hybrids.
abstract: We report a simple and easy formation of hybrids between multi-wall carbon nanotubes and gold nanorods by one-pot in situ photochemical synthesis. Measurements of surface-enhanced Raman scattering (SERS) through the effect "coffee ring" in visible and near infrared (NIR) show high sensitivity with detection of nanomolar concentrations of aromatic dyes. The formation of nanocomposites between carbon nanotubes and gold nanorods without chemical binders simplifies the preparation. Photochemical synthesis is an advance over the techniques previously published.
authors.affiliation: Nanomaterials Laboratory, Department of Physics, Federal University of Minas Gerais, Av. Antônio Carlos, 6627, 31270-901 Belo Horizonte, MG, Brazil. Electronic address: andersoncaires@outlook.com.
authors.forename: A J
authors.initials: AJ
authors.lastname: Caires
authors.affiliation: Department of Microbiology, Institute of Biological Science, Federal University of Minas Gerais, Av. Antônio Carlos, 6627, 31270-901 Belo Horizonte, MG, Brazil.
authors.forename: R P
authors.initials: RP
authors.lastname: Vaz
authors.affiliation: Nanomaterials Laboratory, Department of Physics, Federal University of Minas Gerais, Av. Antônio Carlos, 6627, 31270-901 Belo Horizonte, MG, Brazil.
authors.forename: C
authors.initials: C
authors.lastname: Fantini
authors.affiliation: Nanomaterials Laboratory, Department of Physics, Federal University of Minas Gerais, Av. Antônio Carlos, 6627, 31270-901 Belo Horizonte, MG, Brazil.
authors.forename: L O
authors.initials: LO
authors.lastname: Ladeira
mesh_terms: D048588:Benzoxazines / Q000032:analysis; D004396:Coloring Agents / Q000032:analysis*; D006046:Gold / Q000737:chemistry*; D008751:Methylene Blue / Q000032:analysis; D053761:Nanocomposites / Q000737:chemistry* / Q000648:ultrastructure; D043942:Nanotubes / Q000737:chemistry* / Q000648:ultrastructure; D037742:Nanotubes, Carbon / Q000737:chemistry* / Q000648:ultrastructure; D055668:Photochemical Processes; D013059:Spectrum Analysis, Raman / Q000379:methods; D014466:Ultraviolet Rays
chemical_list: D048588:Benzoxazines; D004396:Coloring Agents; D037742:Nanotubes, Carbon; C028911:cresyl violet; D006046:Gold; D008751:Methylene Blue
keywords: Carbon Nanotubes; Coffee ring; Gold nanorods; Hybrids; Nanocomposite; Photochemical; SERS