Electrically driven PEDOT/PSS actuators

Okuzaki, Hidenori; Suzuki, Hiroki; Ito, Takamichi

doi:10.1016/j.synthmet.2009.07.054

Cited by 79 publications

(61 citation statements)

References 28 publications

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“…Polymer swelling during redox switching has been studied extensively in PPy [27][28][29][30] and to some extent also in PEDOT 31,32 and employed in actuator applications. [33][34][35] The direction of ion and solvent movement, and thus volume change, upon an applied potential will depend on the fixed charges within the (oxidized) polymer (P + in equation 1). If small anions (A -) are used as the counter ions during synthesis, these can leave the film (represented by brackets) upon reduction to a neutral state (P 0 ).…”

Section: Figure 1 When a Thin Film Of Pedot-s:h (Left Panel) Is Submmentioning

confidence: 99%

Electronic Control over Detachment of a Self-Doped Water-Soluble Conjugated Polyelectrolyte

Persson

Gabrielsson

Sawatdee³

et al. 2014

Langmuir

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Water-soluble conducting polymers are of interest to enable more versatile processing in aqueous media as well as to facilitate interactions with biomolecules. Here, we report a substituted poly(3,4-ethylenedioxythiophene) derivative (PEDOT-S:H) that is fully water-soluble and selfdoped. When electrochemically oxidizing a PEDOT-S:H thin film, the film detaches from the under-laying electrode. The oxidation of PEDOT-S:H starts with an initial phase of swelling followed by cracking before it finally disrupts into small flakes and detaches from the electrode.We investigated the detachment mechanism and found that parameters such as the size, charge and concentration of ions in the electrolyte, the temperature and also the pH influence the characteristics of detachment. When oxidizing PEDOT-S:H, the positively charged polymer backbone is balanced by anions from the electrolyte solution and also by the sulphonate groups 2 on the side chains (more self-doping). From our experiments, we conclude that detachment of the PEDOT-S:H film upon oxidation occurs in part due to swelling caused by an inflow of solvated anions and associated water, and in part due to chain rearrangements within the film, caused by more self-doping. We believe that PEDOT-S:H detachment can be of interest in a number of different applications, including addressed and active control of the release of materials such as biomolecules and cell cultures.

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Section: Figure 1 When a Thin Film Of Pedot-s:h (Left Panel) Is Submmentioning

confidence: 99%

Electronic Control over Detachment of a Self-Doped Water-Soluble Conjugated Polyelectrolyte

Persson

Gabrielsson

Sawatdee³

et al. 2014

Langmuir

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show abstract

“…Poly (3,4-ethylenedioxythiophene) doped with poly(4-styrenesulfonate) (PEDOT/PSS), one of the most successful conducting polymers commercially available in the form of aqueous dispersion as colloidal particles, has superior mechanical properties, thermal stability, and high conductivity, which provides potential applications to electrical and optical devices such as transparent electrodes for touch panels and flexible displays [1,2], capacitors [3], microfibers [4][5][6], Shottky diodes [7], field-effect transistors [8][9][10], and actuators [11][12][13]. The resistance of the conductive polymer is, however, too high to fabricate a large-area electronic circuit due to the low electrical conductivity of the commercially available pristine PEDOT/PSS [4,13].…”

Section: Introductionmentioning

confidence: 99%

“…The resistance of the conductive polymer is, however, too high to fabricate a large-area electronic circuit due to the low electrical conductivity of the commercially available pristine PEDOT/PSS [4,13]. Previously, we have reported that electrical conductivity of the PEDOT/PSS significantly increased by two orders of magnitude by addition of certain amount of ethylene glycol [14].…”

Section: Introductionmentioning

confidence: 99%

Effect of Ethylene Glycol on Structure and Carrier Transport in Highly Conductive Poly(3,4-ethylenedioxythiophene)/poly(4-styrenesulfonate)

Murakami

Mori

Okuzaki

2011

Trans. Mat. Res. Soc. Japan

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Highly conductive films made of poly(3,4-ethylenedioxythiophene) doped with poly(4-styrenesulfonate) (PEDOT/PSS) were prepared by casting the PEDOT/PSS aqueous dispersion of colloidal particles containing ethylene glycol (EG). By addition of 3% of EG, the electrical conductivity was significantly increased from 3 to 430 S/cm. The EG was crucially important for (i) removal of the insulating PSS from the surface of the PEDOT/PSS particles, (ii) crystallization of PEDOT molecules, and (iii) aggregation of the particles, which improved both intra-and inter-particle transfer of charge carriers. A further increase of the EG concentration, however, decreased the conductivity, which was due to the morphological inhomogeneity by the phase segregation.

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“…Recently, Okuzaki and coworkers reported a PEDOT/PSS film actuator that exhibits large contraction strain under an applied electric field in ambient conditions. 26,27 The mechanism of the PEDOT/PSS film actuator lies in the desorption of water vapor sorbed in the film through Joule heating, where the equilibrium of water vapor sorption can be controlled by an applied electrical field. The applications of freestanding conductive polymer films are very limited because they tend to be brittle.…”

Section: −24mentioning

confidence: 99%

Electromechanical Actuation of Highly Conductive PEDOT/PSS-coated Cellulose Papers

Zhou

Kimura

2011

Sen-i Gakkaishi

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Electrically driven PEDOT/PSS actuators

Cited by 79 publications

References 28 publications

Electronic Control over Detachment of a Self-Doped Water-Soluble Conjugated Polyelectrolyte

Electronic Control over Detachment of a Self-Doped Water-Soluble Conjugated Polyelectrolyte

Effect of Ethylene Glycol on Structure and Carrier Transport in Highly Conductive Poly(3,4-ethylenedioxythiophene)/poly(4-styrenesulfonate)

Electromechanical Actuation of Highly Conductive PEDOT/PSS-coated Cellulose Papers

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