title: Spatial and directional control over self-assembly using catalytic micropatterned surfaces.
abstract: Catalyst-assisted self-assembly is widespread in nature to achieve spatial control over structure formation. Reported herein is the formation of hydrogel micropatterns on catalytic surfaces. Gelator precursors react on catalytic sites to form building blocks which can self-assemble into nanofibers. The resulting structures preferentially grow where the catalyst is present. Not only is a first level of organization, allowing the construction of hydrogel micropatterns, achieved but a second level of organization is observed among fibers. Indeed, fibers grow with their main axis perpendicular to the substrate. This feature is directly linked to a unique mechanism of fiber formation for a synthetic system. Building blocks are added to fibers in a confined space at the solid-liquid interface.
authors.affiliation: Advanced Soft Matter Group, Department of Chemical Engineering, Delft University of Technology, Julianalaan 136, 2628 BL Delft (The Netherlands).
authors.forename: Alexandre G L
authors.initials: AG
authors.lastname: Olive
authors.forename: Nor Hakimin
authors.initials: NH
authors.lastname: Abdullah
authors.forename: Iwona
authors.initials: I
authors.lastname: Ziemecka
authors.forename: Eduardo
authors.initials: E
authors.lastname: Mendes
authors.forename: Rienk
authors.initials: R
authors.lastname: Eelkema
authors.forename: Jan H
authors.initials: JH
authors.lastname: van Esch
keywords: interfaces; micropatterns; nanostructures; self-assembly; surface chemistry