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Electrically-activated catheter using polypyrrole actuators: Cycling effects Mirfakhrai, Tissaphern; Shoa, Tina; Fekri, Niloofar; Madden, John D.
Abstract
The effect of cycling on charge-storage, actuation and sensing behavior of a polypyrrole is studied, having its application for an electroactive catheter in mind. It is shown that the electrochemical capacitance of a polypyrrole film decreases by about 15 % over the course of 100 cycles, while the per cycle rate of this decrease drops by 75 % between the first and the last ten cycles, implying that a steady-state value may exist. The decrease in capacitance is shown to have a significant effect on actuation strain. In order to achieve a more constant capacitance and more robust actuation performance, it is proposed to pre-cycle the potential of the film to exhaust the effect of processes that contribute to the decrease in capacitance and allow it to reach a more constant value. The ability of a polypyrrole film to generate currents corresponding to applied external load during actuation is verified and the cycle life time of such a sensor is studied. It is shown that after an initial decrease, the sensor current reaches a steady-state value as well, and maintains that value at least over 5600 cycles. Copyright 2009 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
Item Metadata
Title |
Electrically-activated catheter using polypyrrole actuators: Cycling effects
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Creator | |
Publisher |
Society of Photo-Optical Instrumentation Engineers (SPIE)
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Date Issued |
2009
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Description |
The effect of cycling on charge-storage, actuation and sensing behavior of a polypyrrole is studied, having its application for an electroactive
catheter in mind. It is shown that the electrochemical capacitance of a polypyrrole film decreases by about 15 % over the course of 100 cycles,
while the per cycle rate of this decrease drops by 75 % between the first and the last ten cycles, implying that a steady-state value may exist.
The decrease in capacitance is shown to have a significant effect on actuation strain. In order to achieve a more constant capacitance and more
robust actuation performance, it is proposed to pre-cycle the potential of the film to exhaust the effect of processes that contribute to the
decrease in capacitance and allow it to reach a more constant value. The ability of a polypyrrole film to generate currents corresponding to
applied external load during actuation is verified and the cycle life time of such a sensor is studied. It is shown that after an initial decrease,
the sensor current reaches a steady-state value as well, and maintains that value at least over 5600 cycles.
Copyright 2009 Society of Photo-Optical Instrumentation Engineers.
One print or electronic copy may be made for personal use only. Systematic reproduction and distribution,
duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
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Genre | |
Type | |
Language |
eng
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Date Available |
2011-06-01
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Provider |
Vancouver : University of British Columbia Library
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Rights |
Attribution-NonCommercial-NoDerivatives 4.0 International
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DOI |
10.14288/1.0107524
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URI | |
Affiliation | |
Citation |
Mirfakhrai, Tissaphern; Shoa, Tina; Fekri, Niloofar; Madden, John D. Electrically-activated catheter using polypyrrole actuators: Cycling effects. Electroactive Polymer Actuators and Devices (EAPAD) 2009, edited by Yoseph Bar-Cohen, Thomas Wallmersperger, Proceedings of SPIE Volume 728, 72871I, 2009.
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Publisher DOI |
10.1117/12.816056
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Peer Review Status |
Reviewed
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Scholarly Level |
Faculty
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Copyright Holder |
Madden, John D.
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Rights URI | |
Aggregated Source Repository |
DSpace
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Item Media
Item Citations and Data
Rights
Attribution-NonCommercial-NoDerivatives 4.0 International