title: Simultaneous growth of self-patterned carbon nanotube forests with dual height scales.
abstract: In this study, we report on a unique, one-step fabrication technique enabling the simultaneous synthesis of vertically aligned multi-walled carbon nanotubes (VA-MWCNTs) with dual height scales through alcohol catalyzed chemical vapor deposition (ACCVD). Regions of VA-MWCNTs with different heights were well separated from each other leading to a self-patterning on the surface. We devised a unique layer-by-layer process for application of catalyst and inhibitor precursors on oxidized Si (100) surfaces before the ACCVD step to achieve a hierarchical arrangement. Patterning could be controlled by adjusting the molarity and application sequence of precursors. Contact angle measurements on these self-patterned surfaces indicated that manipulation of these hierarchical arrays resulted in a wide range of hydrophobic behavior changing from that of a sticky rose petal to a lotus leaf.
authors.affiliation: Department of Chemistry, Bilkent University, Bilkent, 06800 Ankara, Turkey.
authors.forename: Ebru Devrim
authors.initials: ED
authors.lastname: Sam
authors.forename: Gokce
authors.initials: G
authors.lastname: Kucukayan-Dogu
authors.forename: Beril
authors.initials: B
authors.lastname: Baykal
authors.forename: Zeynep
authors.initials: Z
authors.lastname: Dalkilic
authors.forename: Kuldeep
authors.initials: K
authors.lastname: Rana
authors.forename: Erman
authors.initials: E
authors.lastname: Bengu