Volume 63, Number 3, August 2003
|Page(s)||401 - 407|
|Section||Condensed matter: structure, mechanical and thermal properties|
|Published online||01 November 2003|
Influence of surface morphology on the wettability of cluster-assembled carbon films
Institute for Superhard Materials - Avtozavodskaya str. 2, 254074 Kiev, Ukraine
2 INFM, Dipartimento di Fisica, Università di Milano Via Celoria 16, 20133 Milano, Italy
3 General Physics Institute - Vavilova str. 38, 119991 Moscow, Russia
Accepted: 2 June 2003
We have evaluated the surface energy and characterized the wettability of cluster-assembled carbon films deposited on polyethylene, and substrates by a sessile-drop method using water and glycerol. The effective surface energy of nanostructured carbon is of the order of 30 as calculated using the Fowkes approach. The advancing contact angle (66–83°) is found to increase with surface roughness, i.e. the surface becomes more hydrophobic as the roughness increases. This behavior is ascribed to gas trapping in pores of the film with a self-affine surface. It is argued that the wettability of nanostructured carbon and other cluster-assembled coatings can be tuned simply by controlling the surface topography, through a suitable control of the deposition parameters, such as the cluster size distribution.
PACS: 68.08.Bc – Wetting / 68.35.Ct – Interface structure and roughness / 81.07.-b – Nanoscale materials and structures: fabrication and characterization
© EDP Sciences, 2003
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.