title: Superhydrophobic perpendicular nanopin film by the bottom-up process.
abstract: We first fabricated the superhydrophobic film with a water contact angle of 178 degrees based on a perpendicular nanopin fractal structure by a bottom-up process. Until now, only materials with an original water contact angle larger than 90 degrees , which is classified as hydrophobicity, could be used to fabricate the superhydrophobic film (>170 degrees ) according to the possible fractal structure by a top-down process. Now, in this work, a water contact angle of about 178 degrees can be achieved using a lauric acid-coated film with an original contact angle of 75 degrees , which is classified as hydrophilicity, based on an ideal fractal structure for the superhydrophobic surface which is fabricated by the nanosize pin with 6.5 nm diameter.
authors.affiliation: National Institute of Advanced Industrial Science and Technology, Umezono, 1-1-1, Tsukuba 305-8568, Japan.
authors.forename: Eiji
authors.initials: E
authors.lastname: Hosono
authors.forename: Shinobu
authors.initials: S
authors.lastname: Fujihara
authors.forename: Itaru
authors.initials: I
authors.lastname: Honma
authors.forename: Haoshen
authors.initials: H
authors.lastname: Zhou