title: Self-catalytic and selective growth of ZnO nanoneedles by micro-contact printing and CVD.
abstract: A self-catalytic method to selectively grow ZnO nanoneedles is demonstrated by simply combining a conventional micro-contact printing (mu-CP) and two-step metal-organic chemical vapor deposition (MOCVD) techniques. Self-assembled monolayers (SAMs) of octadecyltrichlorosilane (OTS) were patterned on Si substrates by mu-CP. The patterned structures of the ZnO nanoneedles were realized on the SAMs-patterned Si substrates by two-step MOCVD at high temperature of 600 degrees C via the initial preparation of a thin ZnO seed layer with retaining the patterned morphology at low temperature of 170 degrees C. This combined method of mu-CP and self-catalytic two-step MOCVD should be applicable to fabricate the patterned alignments of metal oxide nanostructures.
authors.affiliation: Device Materials Research Center Advanced Materials Division, Korea Research Institute of Chemical Technology, Yuseong P.O. Box 107, Daejeon 305-600, Korea.
authors.forename: Sun S
authors.initials: SS
authors.lastname: Lee
authors.forename: Hyun-Jin
authors.initials: HJ
authors.lastname: Kim
authors.forename: Kiwhan
authors.initials: K
authors.lastname: Sung
authors.forename: Young K
authors.initials: YK
authors.lastname: Lee
authors.forename: Taek-Mo
authors.initials: TM
authors.lastname: Chung
authors.forename: Chang G
authors.initials: CG
authors.lastname: Kim
authors.forename: Ki-Seok
authors.initials: KS
authors.lastname: An