title: Morphology modulating the wettability of a diamond film.
abstract: Control of the wetting property of diamond surface has been a challenge because of its maximal hardness and good chemical inertness. In this work, the micro/nanoarray structures etched into diamond film surfaces by a maskless plasma method are shown to fix a surface's wettability characteristics, and this means that the change in morphology is able to modulate the wettability of a diamond film from weakly hydrophilic to either superhydrophilic or superhydrophobic. It can be seen that the etched diamond surface with a mushroom-shaped array is superhydrophobic following the Cassie mode, whereas the etched surface with nanocone arrays is superhydrophilic in accordance with the hemiwicking mechnism. In addition, the difference in cone densities of superhydrophilic nanocone surfaces has a significant effect on water spreading, which is mainly derived from different driving forces. This low-cost and convenient means of altering the wetting properties of diamond surfaces can be further applied to underlying wetting phenomena and expand the applications of diamond in various fields.
authors.affiliation: Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences , Beijing 100190, China.
authors.forename: Shibing
authors.initials: S
authors.lastname: Tian
authors.forename: Weijie
authors.initials: W
authors.lastname: Sun
authors.forename: Zhaosheng
authors.initials: Z
authors.lastname: Hu
authors.forename: Baogang
authors.initials: B
authors.lastname: Quan
authors.forename: Xiaoxiang
authors.initials: X
authors.lastname: Xia
authors.forename: Yunlong
authors.initials: Y
authors.lastname: Li
authors.forename: Dong
authors.initials: D
authors.lastname: Han
authors.forename: Junjie
authors.initials: J
authors.lastname: Li
authors.forename: Changzhi
authors.initials: C
authors.lastname: Gu
mesh_terms: D018130:Diamond / Q000737:chemistry*; D008567:Membranes, Artificial; D017155:Wettability
chemical_list: D008567:Membranes, Artificial; D018130:Diamond