Multimaterial fiber microelectromechanical systems based on electrostrictive P(VDF-TrFE-CFE)
Name
940570208-MIT.pdf
Description
Full printable version
Size
1.48 MB
Format
Adobe PDF
Checksum (MD5)
66c2dc7899273f598b8a8ae7ab03d1a0
Author(s)
Clayton, Jefferson (Jefferson Daniel)
Date Issued
2015
Publisher
Massachusetts Institute of Technology
Abstract
The miniaturization of electromechanical transducers using bulk and surface micromachining processes has enabled the deployment of microelectromechanical systems (MEMS) in a variety of applications, from cell phones and ink-jet printers to drug delivery devices. A recently developed approach for the fabrication of multimaterial fiber devices presents a unique opportunity to realize MEMS in a novel form. In this paper a thermally drawn MEMS fiber device based on P(VDF-TrFE-CFE) ferrorelaxor terpolymer is presented. Electromechanical actuation capabilities of this fiber device are established with a maximum strain of 0.78% and a maximum transverse deflection of 7[mu]m under an applied voltage of 300VDC. The potential of this approach to realize complex electromechanical systems in fibers is illustrated by the fabrication of an electrostrictive device capable of modulating a light source reflected off the surface of the fiber. Amplitude modulation of incident light through electric field induced deflection is demonstrated up to the second harmonic frequency of the fiber at 158.3Hz, and a modulation depth of 22.5% is reported; for an array of such fibers in PDMS, amplitude modulation is demonstrated at low frequencies with a modulation depth of 25.8%. These results pave the way to the realization of sophisticated MEMS in fiber, with potential applications in large surface area devices such as interactive haptic displays, acoustic modulators, and energy harvesting systems.
Description
Thesis: S.M., Massachusetts Institute of Technology, Department of Materials Science and Engineering, 2015.
This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references (pages 45-46).
Subjects
Materials Science and Engineering.
MIT Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
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