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Experimental Demonstration of Hydrophobicity Variation in Carbon Nanotubes by Surface Modifications

Biomedical Sciences Research Institute Computer Science Research Institute Environmental Sciences Research Institute Nanotechnology & Advanced Materials Research Institute

Mathur, A, Wadhwa, S, Byrne, JA, Roy, SS and McLaughlin, JAD (2009) Experimental Demonstration of Hydrophobicity Variation in Carbon Nanotubes by Surface Modifications. e-Journal of Surface Science and Nanotechnology, 7 . pp. 334-336. [Journal article]

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URL: http://dx.doi.org/10.1380/ejssnt.2009.334

DOI: doi:10.1380/ejssnt.2009.334

Abstract

Surface modification of the carbon nanotubes is important for their application in various fields. In this study, multiwalled carbon nanotubes (MWCNTs) were grown on cobalt catalyst layer (3 nm thickness) sputtered on a silicon substrate using Microwave Plasma Enhanced Chemical Vapor Deposition (MPECVD) system. The as-grown MWCNT layer was found to have a thickness of ∼5 μm and an average nanotube diameter ∼70 nm. The surface of as-grown nanotubes was modified by polyvinyl alcohol (PVA). The surface hydrophobicity has been estimated by measuring the static contact angles of water on nanotube surfaces before and after the modification by varying PVA concentration in the range of 1:10,000-5:10,000 (w/v). This functionalisation showed a dramatic change of the surface of nanotubes from highly hydrophobic to hydrophilic. The fictionalization of MWCNTs was confirmed further with electrochemical measurements.

Item Type:Journal article
Keywords:Nanotubes; Scanning electron microscopy (SEM); Sputtering; Contact angle; Surface energy
Faculties and Schools:Faculty of Computing & Engineering
Faculty of Computing & Engineering > School of Engineering
Research Institutes and Groups:Engineering Research Institute
Engineering Research Institute > Nanotechnology & Integrated BioEngineering Centre (NIBEC)
ID Code:408
Deposited By:Mrs Ann Blair
Deposited On:28 Oct 2009 13:20
Last Modified:06 Sep 2011 10:24

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