title: Magnetic field switchable dry adhesives.
abstract: A magnetic field controllable dry adhesive device is manufactured. The normal adhesion force can be increased or decreased depending on the presence of an applied magnetic field. If the magnetic field is present during the entire normal adhesion test cycle which includes both applying a preloading force and measuring the pulloff pressure, a decrease in adhesion is observed when compared to when there is no applied magnetic field. Similarly, if the magnetic field is present only during the preload portion of the normal adhesion test cycle, a decrease in adhesion is observed because of an increased stiffness of the magnetically controlled dry adhesive device. When the applied magnetic field is present during only the pulloff portion of the normal adhesion test cycle, either an increase or a decrease in normal adhesion is observed depending on the direction of the applied magnetic field.
authors.affiliation: MENRVA Research Group, School of Engineering Science, Simon Fraser University , Burnaby, British Columbia V5A 1S6, Canada.
authors.forename: Jeffrey
authors.initials: J
authors.lastname: Krahn
authors.forename: Enrico
authors.initials: E
authors.lastname: Bovero
authors.forename: Carlo
authors.initials: C
authors.lastname: Menon
mesh_terms: D000268:Adhesiveness; D000269:Adhesives / Q000138:chemical synthesis / Q000737:chemistry*; D040761:Biomimetic Materials; D060526:Magnetic Fields
chemical_list: D000269:Adhesives
keywords: biomimetic; dry adhesive; force; magnetic; mushroom caps; polymer