| Full text | |
| Author(s): |
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]
Total Authors: 6
|
| Affiliation: | [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
Total Affiliations: 3
|
| Document type: | Journal article |
| Source: | Materials Letters; v. 70, p. 89-93, MAR 1 2012. |
| Web of Science Citations: | 58 |
| Abstract | |
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) | |
| FAPESP's process: | 07/00013-4 - New materials, studies and applications of CVD diamond, diamond-like-carbon (DLC) and nanostructured carbon obtained by chemical vapor deposition |
| Grantee: | Evaldo Jose Corat |
| Support Opportunities: | Research Projects - Thematic Grants |