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MICROSCOPIC AND SPECTROSCOPIC CHARACTERIZATION OF PAINTBRUSH-LIKE SINGLE-WALLED CARBON NANOTUBES

By D. BONIFAZI, C. NACCI, R. MAREGA, S. CAMPIDELLI, G. CEBALLOS, S. MODESTI, M. MENEGHETTI and PRATO M.

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

Topics: carbon nanotubes, organic chemistry, supramolecular chemistry, sidewall functionalization, alkanethiol monolayers, electronic properties, STM, fluorination, transport, surface
Year: 2006
DOI identifier: 10.1021/nl060394d
OAI identifier: oai:arts.units.it:11368/1699145
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