Surface‐enhanced Raman scattering of pyridine‐functionalized multi‐walled carbon nanotubes

Abstract

Carbon nanotubes (CNTs) have attracted great attention for their potential use in many applications because of their intrinsic properties. The importance other than the impact of the application of CNT-embedded membranes in the area of water technology development is immense. In this context, the identification and quantification of CNTs in aqueous resources during relevant water purification processes can be proven of high significance. Surface-enhanced Raman scattering (SERS) potentially has the sensitivity required for trace analysis and has been previously used for CNT identification on solid substrates. A thorough study for the identification and quantification of small concentrations of multi-walled CNTs (MWCNTs) in water suspensions via SERS has been performed. The functionalization of MWCNTs with pyridine groups seems to favor the surface enhancement of relevant Raman signal. This study constitutes the first step of a work in progress for the characterization of CNTs at quite low concentration range by SERS in any water suspension. It is based on an ex ante functionalization of the CNTs by pyridine, demonstrating the potential of the method. Our long-term aim is its general application built, however, in an ex post relevant functionalization of the CNTs in any aqueous solution.

Additive Manufacturing‐Enabled Architected Nanocomposite Lattices Coated with Plasmonic Nanoparticles for Water Pollutants Detection

“…As the Ag NPs form, they aggregate due to their high affinity with each other at the 3D printed lattices' surface. [10,55] The Ag + cations' reduction can occur at the MWC-NTs' surface (aromatic rings and functional groups (COO-)) or on the defects present on the PP matrix, onto which the cations can coordinate.…”

Hybrid nanostructures for SERS: materials development and chemical detection

“…315 Anastasopoulos et al have prepared SERS active pyridine moieties via CNT functionalization, yielding SERS sensitive graphitic surfaces in the presence of Ag colloids. 316 It is expected that the above hybrid materials will contribute to the development of new optoelectronic platforms that merge both the optical and electronic properties of the components. This synergism might result in new nanodevices of interest for example in biomedicine and in loco monitoring technologies.…”

Recent advances in linear and non‐linear Raman spectroscopy. Part IX

“…This study constitutes the first step of a work in progress for the characterization of CNTs at quite low concentration by SERS in any water suspension. It is based on an ex ante functionalization of the CNTs by pyridine, demonstrating the potential of the method . Doherty and co‐workers studied the potential of a SERS gel protocol with portable Raman instrumentation.…”