Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 161, Issue 1, Pages 629-634Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2011.10.079
Keywords
Actuator; Low voltage; Carbide-derived carbon (CDC); Ionic liquid
Funding
- Estonian Science Foundation [8172, 8553]
- ESNAM COST Action [MP1003]
- Estonian Ministry of Education [SF0180008s08]
- European Social Fund in Estonia [1.2.0401.09-0079]
- European Science Foundation
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Carbide-derived nanoporous carbon (CDC) based polymeric actuators have been designed and fabricated in combination with gold foil. The gold-foil-modified actuators exhibited high frequency response and required remarkably low operating voltage (as low as +/- 0.25 V). Hot-pressed additional gold layer (thickness 100 nm) ensures better conductivity of polymer supported CDC electrodes, while maintaining the elasticity of actuator. Electrochemical impedance measurements confirmed that relaxation time constant of gold-foil-modified actuator decreased more than one order of magnitude, thus allowing faster charge/discharge cycles. Gold-foil-modified actuators obtained the strain level of 2.2% when rectangular voltage +/- 2 V was applied with frequency 0.5 Hz. However, frequency dependent actuation analyses revealed back-relaxation effect of gold-foil-modified actuators below 0.1 Hz. In case of uncovered CDC actuators aforementioned effect was not observed. (C) 2011 Elsevier B.V. All rights reserved.
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