Cyclic step-voltammetric analysis of cation-driven and anion-driven actuation in polypyrrole films

被引:40
作者
Takashima, W [1 ]
Pandey, SS
Fuchiwaki, M
Kaneto, K
机构
[1] Kyushu Inst Technol, Grad Sch Life Sci & Syst Engn, Iizuka, Fukuoka 8208502, Japan
[2] Osaka Sci & Technol Ctr, Nishi Ku, Osaka 5500004, Japan
来源
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS | 2002年 / 41卷 / 12期
关键词
cation-driven actuation; anion-driven actuation; electrochemomechanical deformation; electrochemical creeping; electrodeposition; polypyrrole; cyclic step-voltammetry;
D O I
10.1143/JJAP.41.7532
中图分类号
O59 [应用物理学];
学科分类号
摘要
Cation-driven and anion-driven electrochemomechanical deformations (ECMD) in electrodeposited polypyrrole (PPy) films have been investigated by means of cyclic voltammetry and cyclic step-voltammetry (CSV). The film deposited from hydrochloric acid (PPyCl) expanded upon anodic reaction (anodic expansion) while that deposited from dodecyl-benzene sulfonic acid (PPyDBS) exhibited cathodic expansion. In the case of the film deposited from p-phenol sulfonic acid (PPyPPS), it was found to show the anodic expansion at 600 mV (vs Ag wire as a reference electrode) along with the cathodic contraction at -800 mV in CSV. The film obtained from the same lot, however, showed cathodic contraction and anodic expansion only by changing the oxidative potential from 600 mV to - 100 mV. This phase inversion indicates that not only the polymerization electrolyte but also the redox potential determines the (de)insertion of ions in the PPyPPS film. Contractive electrochemical creeping was only observed in PPyPPS film in chloride salt electrolytes, indicating that the cation insertion induces the deinsertion of initial-dopant anion from the film.
引用
收藏
页码:7532 / 7536
页数:5
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