A bio-inspired, chemo-responsive polymer nanocomposite for mechanically dynamic microsystems

A. Hess, J. Dunning, J. Harris, J. R. Capadona, K. Shanmuganathan, S. J. Rowan, C. Weder, D. J. Tyler, C. A. Zorman

Research output: Chapter in Book/Report/Conference proceedingConference contribution

13 Citations (Scopus)

Abstract

This paper reports the development of a biologically-inspired, variable-modulus nanocomposite material for mechanically dynamic biomedical microsystems. This nanocomposite is comprised of a poly(vinyl acetate) matrix polymer that is reinforced with rigid cellulose nanofibers, and becomes very flexible when exposed to water. A direct-write CO2 laser was used to pattern structures in this chemical- and temperature-sensitive material. Tensile testing of laser-cut, micron-scale nanocomposite beams was performed using a custom-built tensile tester. These samples displayed a significant reduction in Young's modulus from 4.1 GPa to 6.1 MPa when the nanocomposite was exposed to phosphate buffered saline. Additionally, the modulus change was observed to be reversible upon drying of soaked tensile samples. As a well-suited application of this nanocomposite, cortical probes utilizing this material as a substrate were fabricated. Gold-coated, dual-shank cortical probes utilizing this nanocomposite as a substrate were shown to record action potentials from a single neuron in a cockroach brain.

Original languageEnglish
Title of host publicationTRANSDUCERS 2009 - 15th International Conference on Solid-State Sensors, Actuators and Microsystems
Pages224-227
Number of pages4
DOIs
Publication statusPublished - 2009
Externally publishedYes
EventTRANSDUCERS 2009 - 15th International Conference on Solid-State Sensors, Actuators and Microsystems - Denver, CO
Duration: 2009 Jun 212009 Jun 25

Other

OtherTRANSDUCERS 2009 - 15th International Conference on Solid-State Sensors, Actuators and Microsystems
CityDenver, CO
Period09/6/2109/6/25

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Keywords

  • Cortical probe
  • Mechanically dynamic
  • Nanocomposite
  • Neural interfacing

ASJC Scopus subject areas

  • Hardware and Architecture
  • Electrical and Electronic Engineering

Cite this

Hess, A., Dunning, J., Harris, J., Capadona, J. R., Shanmuganathan, K., Rowan, S. J., Weder, C., Tyler, D. J., & Zorman, C. A. (2009). A bio-inspired, chemo-responsive polymer nanocomposite for mechanically dynamic microsystems. In TRANSDUCERS 2009 - 15th International Conference on Solid-State Sensors, Actuators and Microsystems (pp. 224-227). [5285522] https://doi.org/10.1109/SENSOR.2009.5285522