期刊
BIOMEDICAL MICRODEVICES
卷 15, 期 6, 页码 997-1003出版社
SPRINGER
DOI: 10.1007/s10544-013-9791-7
关键词
Superparamagnetic nanocomposite; Microrobots; Magnetic actuation; Cytotoxicity
资金
- Swiss National Science Foundation (SNSF) [130069]
- ETH Zurich [TH-28 06-3]
This work presents the fabrication and controlled actuation of swimming microrobots made of a magnetic polymer composite (MPC) consisting of 11-nm-diameter magnetite (Fe3O4) nanoparticles and photocurable resin (SU-8). Two-photon polymerization (TPP) is used to fabricate the magnetic microstructures. The material properties and the cytotoxicity of the MPC with different nanoparticle concentrations are characterized. The live/dead staining tests indicate that MPC samples with varied concentrations, up to 10 vol.%, have negligible cytotoxicity after 24 h incubation. Fabrication parameters of MPC with up to 4 vol.% were investigated. We demonstrate that the helical microdevices made of 2 vol.% MPC were capable of performing corkscrew motion in water applying weak uniform rotating magnetic fields.
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