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Amauri J. Paula, Diego Stéfani, Prof.  Antonio G. Souza Filho, Prof.  Yoong Ahm Kim, Prof.  Morinobu Endo and Prof.  Oswaldo L. Alves Surface Chemistry in the Process of Coating Mesoporous SiO2 onto Carbon Nanotubes Driven by the Formation of Si[BOND]O[BOND]C Bonds Chemistry - A European Journal 17

Article first published online: 15 FEB 2011 | DOI: 10.1002/chem.201002455

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Nanotube surface chemistry: In contrast to the simple approach normally used to describe the attachment of inorganic compounds on oxidized carbon nanotubes (CNTs), SiO2 nucleation on the tubes is a result of nucleophilic attack mainly by hydroxyl radicals, localized in a very complex surface-chemical environment, where various oxygenated groups are covalently bonded to the sidewall, and carboxylated carbonaceous fragments (CCFs) are adsorbed on the tubes. Preferential attachment on the sidewall results mostly in CNTs with uncapped ends (see picture).

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