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Enhanced electrochemical strain in polypyrrole films
Takaharu Nakashima,Devendra Kumar,Wataru Takashima,Tetsuji Zama,Susumu Hara,Shingo Sewa,Keiich Kaneto 한국물리학회 2005 Current Applied Physics Vol.5 No.2
Electrochemomechanical characteristics of polypyrrole (PPy) lms, electrodeposited from tetra-n-butylammonium triuorometh-ane-sulfonate dissolved in methyl benzoate (PPyFMS), have been investigated using a simultaneous measurement of electrochem-omechanical deformation (ECMD) with cyclic voltammetry (CV) by comparing with PPy lms deposited fromp-phenol sulfonate inaqueous media (PPyPPS). The ECMD magnitude of PPyFMS lm was reached around 9% at 1st cycle and was decreased to beabout 3.2% at 20th cycle with electrochemical cycling in 1 M NaPF6. While in 1 M NaCl solution, the ECMD magnitude was1.9% at 20th cycle in CV measurement. In the case for the PPyPPS lm, ECMD magnitude at 20th cycle was around 0.8% and1.1% in 1 M NaPF 6 and 1 M NaCl solutions, respectively. The results indicate that the combination of electrolytes employed inboth the electrodeposition and the device actuation plays the very important role for achieving the enhancement of ECMD magn-itudes. In the case of ECMD behaviors, it was found that the electrolyte used in the lm actuation determines the ECMD charac-teristics..