The European Physical Journal. E, Soft Matter | 2021

Light- and magnetically actuated FePt microswimmers



Externally controlled microswimmers offer prospects for transport in biological research and medical applications. This requires biocompatibility of the swimmers and the possibility to tailor their propulsion mechanisms to the respective low Reynolds number environment. Here, we incorporate low amounts of the biocompatible alloy of iron and platinum (FePt) in its \\documentclass[12pt]{minimal} \\usepackage{amsmath} \\usepackage{wasysym} \\usepackage{amsfonts} \\usepackage{amssymb} \\usepackage{amsbsy} \\usepackage{mathrsfs} \\usepackage{upgreek} \\setlength{\\oddsidemargin}{-69pt} \\begin{document}$$\\hbox {L1}_{{0}}$$\\end{document}L10 phase in microstructures by a versatile one-step physical vapor deposition process. We show that the hard magnetic properties of \\documentclass[12pt]{minimal} \\usepackage{amsmath} \\usepackage{wasysym} \\usepackage{amsfonts} \\usepackage{amssymb} \\usepackage{amsbsy} \\usepackage{mathrsfs} \\usepackage{upgreek} \\setlength{\\oddsidemargin}{-69pt} \\begin{document}$$\\hbox {L1}_{{0}}$$\\end{document}L10 FePt are beneficial for the propulsion of helical micropropellers with rotating magnetic fields. Finally, we find that the FePt coatings are catalytically active and also make for Janus microswimmers that can be light-actuated and magnetically guided. Supplementary Information The online version supplementary material available at 10.1140/epje/s10189-021-00074-1.

Volume 44
Pages None
DOI 10.1140/epje/s10189-021-00074-1
Language English
Journal The European Physical Journal. E, Soft Matter

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