title: Perpendicular orientation of sub-10 nm channels in polystyrene-b-poly(4-hydroxyl styrene)/PEG oligomer blend thin films.
abstract: Vertically oriented cylinders via the directional coalescence of the spheres embedded in the blend thin films from polystyrene-b-poly(4-hydroxyl styrene) (PS-b-PHS) and PEG induced by solvent annealing were achieved. Removal of PEG water led to the formation of nanochannels throughout the films. The diameter of these channels could be as small as 9 nm which might enhance the applicability of the nano-porous films as size-selective membranes and controllable drug delivery systems for the objects less than 10 nm.
authors.affiliation: Department of Materials Science and Engineering, Graduate School of Engineering, Nagoya Institute of Technology, Nagoya 466-8555, Japan.
authors.forename: Guanghui
authors.initials: G
authors.lastname: Cui
authors.forename: Satoshi
authors.initials: S
authors.lastname: Ohya
authors.forename: Taito
authors.initials: T
authors.lastname: Matsutani
authors.forename: Shusaku
authors.initials: S
authors.lastname: Nagano
authors.forename: Tomoki
authors.initials: T
authors.lastname: Dohi
authors.forename: Shiyuko
authors.initials: S
authors.lastname: Nakamura
authors.forename: Shinichi
authors.initials: S
authors.lastname: Sakurai
authors.forename: Tsukasa
authors.initials: T
authors.lastname: Miyazaki
authors.forename: Katsuhiro
authors.initials: K
authors.lastname: Yamamoto
mesh_terms: D016503:Drug Delivery Systems; D008567:Membranes, Artificial; D011092:Polyethylene Glycols / Q000737:chemistry*; D011137:Polystyrenes / Q000737:chemistry*; D016062:Porosity
chemical_list: D008567:Membranes, Artificial; D011137:Polystyrenes; D011092:Polyethylene Glycols