Magnetically Patterned Rolled-Up Exchange Bias Tubes: A Paternoster for Superparamagnetic Beads
| Autor: | Iris Koch, Dennis Holzinger, Robert Streubel, Timo Ueltzhöffer, Oliver G. Schmidt, Arno Ehresmann, Denys Makarov |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Materials science
ion bombardment induced magnetic patterning Field (physics) Magnetic domain General Physics and Astronomy Nanotechnology 02 engineering and technology 010402 general chemistry 01 natural sciences law.invention particle transport law Rolled-up tube General Materials Science lab-in-a-tube lab-on-a-chip business.industry Demagnetizing field General Engineering Lab-on-a-chip 021001 nanoscience & nanotechnology 0104 chemical sciences Magnetic field Exchange bias exchange bias Optoelectronics superparamagnetic beads 0210 nano-technology business Layer (electronics) Superparamagnetism |
| Zdroj: | ACS Nano 10(2016), 8491 |
| ISSN: | 1936-086X 1936-0851 |
| DOI: | 10.1021/acsnano.6b03566 |
| Popis: | We realized a deterministic transport system for superparamagnetic beads in a paternoster-like manner with position-dependent trajectories and velocities by rolling up exchange bias layer systems with engineered parallel stripe magnetic domains to tubular architectures possessing distinct azimuthally aligned magnetic domain patterns. By applying periodic pulse sequences of very weak external magnetic fields and taking advantage of the magnetic stray field emerging from the tubular structures, we demonstrate the transport for different superparamagnetic beads either in or above the rolled-up tubes acting as channels. This transport mechanism features high step velocities and remote control of not only the direction and trajectory but also the velocity of the transport without the need of fuel or catalytic material. Therefore, this approach paves the way towards novel 3D-applications in biotechnology, including particle transport related phenomena in lab-on-a chip and lab-in-a-tube devices. |
| Databáze: | OpenAIRE |
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