Fast functionalization of vertically aligned multiwalled carbon nanotubes using oxygen plasma

Autor(es)

Lobo, Anderson Oliveira ^[1] ; Ramos, Sandra Cristina ^[2] ; Antunes, Erica Freire ^[3] ; Marciano, Fernanda Roberta ^[1] ; Trava-Airoldi, Vladimir Jesus ^[2] ; Corat, Evaldo Jose ^[2]

Afiliação do(s) autor(es)

^[1] Univ Vale Paraiba, Lab Nanotecnogia Biomed NanoBio, BR-12244000 Sao Jose Dos Campos, SP - Brazil

^[2] Inst Nacl Pesquisas Espaciais, Lab Associado Sensores & Mat LAS, BR-12227010 Sao Jose Dos Campos, SP - Brazil

^[3] ITA, BR-12228900 Sao Jose Dos Campos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Materials Letters; v. 70, p. 89-93, MAR 1 2012.
• Citações Web of Science: 58

Resumo

This work studied oxygen plasma treatment, at different times, on vertically aligned multiwalled carbon nanotube (VACNT) surfaces using the pulsed-discharge plasma technique. As-grown VACNT surfaces were superhydrophobic. Pure oxygen plasma etching modified VACNT surfaces to get a superhydrophilic behavior after only 2 min. Contact angle and surface energy measurements by the sessile drop method examined the VACNT surface wetting. X-ray Photoelectron Spectroscopy showed the heavy grafting of oxygen-groups onto VACNT surfaces after oxygen plasma etching. The results showed the great influence of polar groups on wetting behavior, with a strong correlation between the polar part of the surface energy and the oxygen content on the VACNT surfaces. These findings proved that oxygen plasma etching is a rapid and efficient method for functionalization of VACNT surfaces. (C) 2011 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 07/00013-4 - Novos materiais, estudos e aplicações inovadoras em diamante-CVD, diamond-like-carbon (DLC) e carbono nanoestruturado obtidos por deposição química a partir da fase vapor
• Beneficiário: Evaldo Jose Corat
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 06/03525-3 - Sintese de nanotubos de carbono para aplicacoes tribologicas e estruturais.
• Beneficiário: Erica Freire Antunes
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado