title: SiO2 nanodot arrays using functionalized block copolymer templates and selective silylation.
abstract: Silicon oxide nanodot arrays were fabricated using functionalized block copolymer templates and selective silylation. A polystyrene-b-poly(acrylic acid/acrylic anhydride) (PS-b-PAA/AN) thin film containing spherical nanodomains was used as a template to build nanoscopic silica structures. A PS-b-PAA/AN thin film was prepared by acid-catalyzed thermal deprotection of polystyrene-b-poly(tert-butyl acrylate) on an SU-8 resist film containing a photoacid generator. This resulting film has excellent solvent and thermal resistance due to crosslinked anhydride linkages in carboxyl-functionalized PAA/AN block domains. Silicon was introduced by spin-spraying of hexamethyldisilazane (HMDS) over the entire surface of a self-assembled PS-b-PAA/AN thin film. HMDS was selectively reacted with carboxylic acid groups in spherical domains of a PAA/AN block. SiO(2) nanodot arrays were generated by oxygen reactive ion etching.
authors.affiliation: Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Yuseong-Gu, Daejeon, Republic of Korea.
authors.forename: Su Min
authors.initials: SM
authors.lastname: Kim
authors.forename: Se Jin
authors.initials: SJ
authors.lastname: Ku
authors.forename: Jin-Baek
authors.initials: JB
authors.lastname: Kim