Abstract
We propose a novel method to fabricate three-dimensional magnetic microparts, which can be integrated in functional microfluidic networks and lab-on-a-chip devices, by the combination of two-photon microfabrication and selective electroless plating. In our experiments, magnetic microparts could be successfully fabricated by optimizing various experimental conditions of electroless plating. In addition, energy dispersive X-ray spectrometry (EDS) clarified that iron oxide nanoparticles were deposited onto the polymeric microstructure site-selectively. We also fabricated magnetic microrotors which could smoothly rotate using common laboratory equipment. Since such magnetic microparts can be remotely driven with an external magnetic field, our fabrication process can be applied to functional lab-on-a-chip devices for analytical and biological applications.
Highlights
There is a growing need for three-dimensional (3D) printing techniques, such as fused deposition modeling (FDM) [1,2], inkjet modeling [3,4], and stereolithography [5,6], for the fabrication of arbitrary, complicated 3D structures
Two-photon microfabrication enables the fabrication of 3D microstructures with down-to-100-nm resolution via direct laser writing using a femtosecond pulsed laser beam
We proposed proposed aa novel novel fabrication fabrication process for for 3D
Summary
There is a growing need for three-dimensional (3D) printing techniques, such as fused deposition modeling (FDM) [1,2], inkjet modeling [3,4], and stereolithography [5,6], for the fabrication of arbitrary, complicated 3D structures. Two-photon microfabrication enables the fabrication of 3D microstructures with down-to-100-nm resolution via direct laser writing using a femtosecond pulsed laser beam. Thanks to this ultrahigh resolution, it has been applied in a wide range of fields, including the production of photonic crystals [7], lab-on-a-chip devices [8], bioscaffolds [9,10], micromachines [11,12], and so forth. As a different plating technique, we propose a highly selective method to fabricate magnetic microparts with the combination of two-photon microfabrication and electroless magnetite plating. Energy dispersive X-ray spectrometry (EDS) and the driving experiment of microrotors clarified the magnetic properties of these microparts and highlighted their importance
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