title: Magnetofluidic Tweezing of Nonmagnetic Colloids.
abstract: Magnetofluidic tweezing based on negative magnetophoresis and microfabricated core-shell magnetic microtips allows controlled on-demand assembly of colloids and microparticles into various static and dynamic structures such as colloidal crystals (as shown for 3.2 μm silica particles).
authors.affiliation: Harvard John A. Paulson School of Engineeringand Applied Sciences, Harvard University, Cambridge, MA, 02138, USA.
authors.forename: Jaakko V I
authors.initials: JV
authors.lastname: Timonen
authors.affiliation: Department of Materials, ETH Zurich, Zurich, Switzerland.
authors.forename: Ahmet F
authors.initials: AF
authors.lastname: Demirörs
authors.affiliation: IBS Center for Soft and Living Matter and the Department of Chemistry, UNIST, Ulsan, South Korea.
authors.forename: Bartosz A
authors.initials: BA
authors.lastname: Grzybowski
keywords: colloids; magnetic tweezers; microparticles; self-assembly