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Highly responsive core-shell microactuator arrays for use in viscous and viscoelastic fluids.

ABSTRACT: We present a new fabrication method to produce arrays of highly responsive polymer-metal core-shell magnetic microactuators. The core-shell fabrication method decouples the elastic and magnetic structural components such that the actuator response can be optimized by adjusting the core-shell geometry. Our microstructures are 10 ?m long, 550 nm in diameter, and electrochemically fabricated in particle track-etched membranes, comprising a poly(dimethylsiloxane) core with a 100 nm Ni shell surrounding the upper 3-8 ?m. The structures can achieve deflections of nearly 90° with moderate magnetic fields and are capable of driving fluid flow in a fluid 550 times more viscous than water.

SUBMITTER: Fiser BL

PROVIDER: S-EPMC4577244 | biostudies-literature | 2015 Feb

REPOSITORIES: biostudies-literature

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Highly responsive core-shell microactuator arrays for use in viscous and viscoelastic fluids.

Fiser Briana L BL Shields Adam R AR Falvo M R MR Superfine R R

Journal of micromechanics and microengineering : structures, devices, and systems 20150201 2

We present a new fabrication method to produce arrays of highly responsive polymer-metal core-shell magnetic microactuators. The core-shell fabrication method decouples the elastic and magnetic structural components such that the actuator response can be optimized by adjusting the core-shell geometry. Our microstructures are 10 μm long, 550 nm in diameter, and electrochemically fabricated in particle track-etched membranes, comprising a poly(dimethylsiloxane) core with a 100 nm Ni shell surround ...[more]

PMID: 26405376

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