Inkjet Printed Superparamagnetic Polymer Composite Hemispheres with Programmed Magnetic Anisotropy
| Autor: | Victor J. Cadarso, Maurizio R. Gullo, Philipe Fatio, Simone Gervasoni, Olgaç Ergeneman, Christopher Hierold, Christian Peters, Jürgen Brugger, Salvador Pané, Berna Özkale, Bradley J. Nelson, Loïc Jacot-Descombes, Massimo Mastrangeli |
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| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
Materials science
Nanostructure Physique appliquée des surfaces magnetic manipulation Nanoparticle Nanotechnology anisotropy Chimie inorganique interfaces Technologie des matières plastiques Génie chimique General Materials Science superparamagnetic polymer composite Anisotropy chemistry.chemical_classification magnetic anisotropy inkjet printing Technologie de la production Polymer self-assembly Magnetic field SU-8 Magnetic anisotropy chemistry Nanorobotics Superparamagnetism |
| Zdroj: | Nanoscale, 6 Nanoscale, 6 (18) Nanoscale |
| ISSN: | 2040-3364 2040-3372 |
| Popis: | We present the fabrication and characterization of large arrays of inkjet-printed superparamagnetic polymer composite (SPMPC) hemispherical microstructures. SPMPCs are appealing for applications in microsystems and nanorobotics due to the added functionality of polymers and the significant magnetic attributes of embedded nanostructures. SPMPC-based microarchitectures can be used to perform different functions wirelessly in various media (e.g. water, solvents) using external magnetic fields: handling and assembling small objects, delivering drugs or biomass, or sensing specific physical or chemical changes. In this work superparamagnetic magnetite nanoparticles are dispersed in SU-8 to form magnetic hemispheres. Magnetically anisotropic hemispheres as well as standard SPMPC hemispheres are fabricated. Magnetic anisotropy is programmed by applying a magnetic field during curing. The distribution of nanoparticles inside the polymer matrix and magnetic characteristics of the SPMPC are investigated. Magnetic manipulation of hemispheres is demonstrated at liquid–liquid interfaces. Different assembly strategies to form lines or geometric shapes from hemispheres as well as their independent dynamic control are demonstrated. Finally, a two-interface assembly strategy is demonstrated to assemble hemispheres into complete spheres for advanced self-assembly tasks. Nanoscale, 6 (18) ISSN:2040-3364 ISSN:2040-3372 |
| Databáze: | OpenAIRE |
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