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Home > Press > “Graphene oxide nanoribbon actuators for MEMS and other electrolyte-free motion systems”

Graphene oxide nanoribbons (GOr), obtained by chemically unzipping multi-walled carbon nanotubes, were assembled into macroscopic mats by vacuum filtration. These mats exhibited up to 1.6% reversible contraction when electrically heated at ambient conditions. The experimentally derived work capacity of the mats was about 40 J/kg, which is similar to that of natural muscle. It was limited by the mechanical strength of mats and can be increased upon optimization of their preparation conditions. X-ray diffraction measurements indicated reversible changes in the interplanar spacing of GOr layers during heating. These dimensional changes can be associated with reversible adsorption/desorption of water molecules between GOr layers and used in thermally-driven micro-electromechanical systems (MEMS), micromachines, various opto-mechanic and micro-fluidic devices. Similar to shape memory alloy actuators, GOr mats can be deployed for electrolyte-free artificial muscle applications. The work reported in Chemical Physics Letters, 505 (2011) 31 extends the list of properties available from graphene oxide.

“Graphene oxide nanoribbon actuators for MEMS and other electrolyte-free motion systems”

Dallas, TX | Posted on April 25th, 2011


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Mikhail E Kozlov

Copyright © University of Texas Dallas

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"Thermal actuation of graphene oxide nanoribbon mats" in Chemical Physics Letters.

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