Superhydrophobic perpendicular nanopin film by the bottom-up process

Eiji Hosono; Shinobu Fujihara; Itaru Honma; Haoshen Zhou

doi:10.1021/ja053745j

Superhydrophobic perpendicular nanopin film by the bottom-up process

J Am Chem Soc. 2005 Oct 5;127(39):13458-9. doi: 10.1021/ja053745j.

Authors

Eiji Hosono¹, Shinobu Fujihara, Itaru Honma, Haoshen Zhou

Affiliation

¹ National Institute of Advanced Industrial Science and Technology, Umezono, 1-1-1, Tsukuba 305-8568, Japan.

PMID: 16190684
DOI: 10.1021/ja053745j

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.