title: Microscopic and spectroscopic characterization of paintbrush-like single-walled carbon nanotubes.
abstract: Understanding and controlling the chemical reactivity of carbon nanotubes (CNTs) is a fundamental requisite to prepare novel nanoscopic structures with practical uses in materials applications. Here, we present a comprehensive microscopic and spectroscopic characterization of carbon nanotubes which have been chemically modified. Specifically, scanning tunneling microscopy (STM) investigations of short-oxidized single-walled carbon nanotubes (SWNTs) functionalized with aliphatic chains via amide reaction reveal the presence of bright lumps both on the sidewalls and at the tips. The functionalization pattern is consistent with the oxidation reaction which mainly occurs at the nanotube tips. Thermogravimetric analysis (TGA), steady-state electronic absorption (UV-vis-NIR), and Raman spectroscopic studies confirm the STM observations.
authors.affiliation: Dipartimento di Scienze Farmaceutiche and INSTM UdR Trieste, Università degli Studi di Trieste, Italy.
authors.forename: Davide
authors.initials: D
authors.lastname: Bonifazi
authors.forename: Christophe
authors.initials: C
authors.lastname: Nacci
authors.forename: Riccardo
authors.initials: R
authors.lastname: Marega
authors.forename: Stephane
authors.initials: S
authors.lastname: Campidelli
authors.forename: Gustavo
authors.initials: G
authors.lastname: Ceballos
authors.forename: Silvio
authors.initials: S
authors.lastname: Modesti
authors.forename: Moreno
authors.initials: M
authors.lastname: Meneghetti
authors.forename: Maurizio
authors.initials: M
authors.lastname: Prato
mesh_terms: D000577:Amides / Q000737:chemistry; D016252:Microscopy, Scanning Tunneling; D037742:Nanotubes, Carbon / Q000737:chemistry* / Q000648:ultrastructure; D013059:Spectrum Analysis, Raman; D013818:Thermogravimetry
chemical_list: D000577:Amides; D037742:Nanotubes, Carbon