title: Magnetically induced orientation of mesochannels in mesoporous silica films at 30 tesla.
abstract: We demonstrate the magnetically induced orientation of mesochannels in mesoporous silica films prepared with low-molecular-weight surfactants under an extremely high magnetic field of 30 T. This process is principally applicable to any type of surfactant that has magnetic anisotropy because such a high magnetic field provides sufficient magnetic energy for smooth magnetic orientation. Hexadecyltrimethylammonium bromide (CTAB) and polyoxyethylene-10-cetyl ether (Brij 56) were used as cationic and nonionic surfactants, respectively. According to XRD and cross-sectional TEM, mesochannels aligned perpendicular to the substrates were observed in films prepared with low-molecular-weight surfactants, although the effect was incomplete. The evolution of these types of films should lead to future applications such as highly sensitive chemical sensors and selective separation.
authors.affiliation: International Center for Young Scientists, National Institute for Materials Science, Tsukuba-shi, Ibaraki 305-0044, Japan. YAMAUCHI.Yusuke@nims.go.jp
authors.forename: Yusuke
authors.initials: Y
authors.lastname: Yamauchi
authors.forename: Makoto
authors.initials: M
authors.lastname: Sawada
authors.forename: Masaki
authors.initials: M
authors.lastname: Komatsu
authors.forename: Atsushi
authors.initials: A
authors.lastname: Sugiyama
authors.forename: Tetsuya
authors.initials: T
authors.lastname: Osaka
authors.forename: Noriyuki
authors.initials: N
authors.lastname: Hirota
authors.forename: Yoshio
authors.initials: Y
authors.lastname: Sakka
authors.forename: Kazuyuki
authors.initials: K
authors.lastname: Kuroda