title: Fabrication and visualization of metal-ion patterns on glass by dip-pen nanolithography.
abstract: Fluorescent self-assembled monolayers (SAMs) are used as dip-pen nanolithography (DPN) substrates for the fabrication of patterns of Ca(2+) and Cu(2+) ions. The driving force for the transfer of these ions from an atomic force microscopy (AFM) tip to the surface is their complexation to organic ligands on the monolayer. By means of fluorescent surfaces, the patterns can be visualized under a fluorescence microscope. We use a custom-built atomic force fluorescence microscope (AFFM), a combination of atomic force and confocal fluorescence microscopes, to deposit the metal ions onto the sensing SAMs by DPN and to subsequently visualize modulations of fluorescence intensity in a sequential write-read mode.
authors.affiliation: Laboratory of Supramolecular Chemistry and Technology, MESA+Institute for Nanotechnology and Faculty of Science and Technology, University of Twente, 7500 AE Enschede, The Netherlands.
authors.forename: Lourdes
authors.initials: L
authors.lastname: Basabe-Desmonts
authors.forename: Chien-Ching
authors.initials: CC
authors.lastname: Wu
authors.forename: Kees O
authors.initials: KO
authors.lastname: van der Werf
authors.forename: Maria
authors.initials: M
authors.lastname: Peter
authors.forename: Martin
authors.initials: M
authors.lastname: Bennink
authors.forename: Cees
authors.initials: C
authors.lastname: Otto
authors.forename: Aldrik H
authors.initials: AH
authors.lastname: Velders
authors.forename: David N
authors.initials: DN
authors.lastname: Reinhoudt
authors.forename: Vinod
authors.initials: V
authors.lastname: Subramaniam
authors.forename: Mercedes
authors.initials: M
authors.lastname: Crego-Calama
mesh_terms: D005898:Glass; D007477:Ions / Q000737:chemistry; D008670:Metals / Q000737:chemistry*; D018625:Microscopy, Atomic Force; D018613:Microscopy, Confocal; D015394:Molecular Structure; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*
chemical_list: D007477:Ions; D008670:Metals