Tuning the oxygen functional groups in reduced graphene oxide papers to enhance the electromechanical actuation

Ganaka G. Chandrakumara, Jin Shang, Ling Qiu, Xi-Ya Fang, Frank Antolasic, Christopher D. Easton, Jingchao Song, Tuncay Alan, Dan Li, Zhe Liu

Research output: Contribution to journalArticleResearchpeer-review

Abstract

The superior mechanical flexibility, mechanical strength, electrical conductivity, high specific surface area, and a special two-dimensional crystalline structure make graphene a very promising building block material for flexible electromechanical actuators. However, graphene papers have exhibited limited electromechanical actuation strain in aqueous electrolyte solution. In this paper, we show an easy approach to significantly improve the electromechanical actuation of reduced graphene oxide (rGO) papers via fine tuning the oxygen functional groups in rGO sheets, which was achieved by careful control of quantity of the reduction agent used in the chemical reduction process of graphene oxide. The actuation strains are enhanced up to 0.2% at an applied voltage of 1 V, which is more than a 2 fold increase compared to the regular pristine rGO paper. Further theoretical and experimental analyses reveal that the change of the capacitance and the stiffness of the rGO papers are two key factors responsible for the observed improvement.
Original languageEnglish
Pages (from-to)68052 - 68060
Number of pages9
JournalRSC Advances
Volume5
Issue number83
DOIs
Publication statusPublished - 2015

Cite this

Chandrakumara, G. G., Shang, J., Qiu, L., Fang, X-Y., Antolasic, F., Easton, C. D., ... Liu, Z. (2015). Tuning the oxygen functional groups in reduced graphene oxide papers to enhance the electromechanical actuation. RSC Advances, 5(83), 68052 - 68060. https://doi.org/10.1039/c5ra09743f
Chandrakumara, Ganaka G. ; Shang, Jin ; Qiu, Ling ; Fang, Xi-Ya ; Antolasic, Frank ; Easton, Christopher D. ; Song, Jingchao ; Alan, Tuncay ; Li, Dan ; Liu, Zhe. / Tuning the oxygen functional groups in reduced graphene oxide papers to enhance the electromechanical actuation. In: RSC Advances. 2015 ; Vol. 5, No. 83. pp. 68052 - 68060.
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abstract = "The superior mechanical flexibility, mechanical strength, electrical conductivity, high specific surface area, and a special two-dimensional crystalline structure make graphene a very promising building block material for flexible electromechanical actuators. However, graphene papers have exhibited limited electromechanical actuation strain in aqueous electrolyte solution. In this paper, we show an easy approach to significantly improve the electromechanical actuation of reduced graphene oxide (rGO) papers via fine tuning the oxygen functional groups in rGO sheets, which was achieved by careful control of quantity of the reduction agent used in the chemical reduction process of graphene oxide. The actuation strains are enhanced up to 0.2{\%} at an applied voltage of 1 V, which is more than a 2 fold increase compared to the regular pristine rGO paper. Further theoretical and experimental analyses reveal that the change of the capacitance and the stiffness of the rGO papers are two key factors responsible for the observed improvement.",
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Chandrakumara, GG, Shang, J, Qiu, L, Fang, X-Y, Antolasic, F, Easton, CD, Song, J, Alan, T, Li, D & Liu, Z 2015, 'Tuning the oxygen functional groups in reduced graphene oxide papers to enhance the electromechanical actuation' RSC Advances, vol. 5, no. 83, pp. 68052 - 68060. https://doi.org/10.1039/c5ra09743f

Tuning the oxygen functional groups in reduced graphene oxide papers to enhance the electromechanical actuation. / Chandrakumara, Ganaka G.; Shang, Jin; Qiu, Ling; Fang, Xi-Ya; Antolasic, Frank; Easton, Christopher D.; Song, Jingchao; Alan, Tuncay; Li, Dan; Liu, Zhe.

In: RSC Advances, Vol. 5, No. 83, 2015, p. 68052 - 68060.

Research output: Contribution to journalArticleResearchpeer-review

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AU - Chandrakumara, Ganaka G.

AU - Shang, Jin

AU - Qiu, Ling

AU - Fang, Xi-Ya

AU - Antolasic, Frank

AU - Easton, Christopher D.

AU - Song, Jingchao

AU - Alan, Tuncay

AU - Li, Dan

AU - Liu, Zhe

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AB - The superior mechanical flexibility, mechanical strength, electrical conductivity, high specific surface area, and a special two-dimensional crystalline structure make graphene a very promising building block material for flexible electromechanical actuators. However, graphene papers have exhibited limited electromechanical actuation strain in aqueous electrolyte solution. In this paper, we show an easy approach to significantly improve the electromechanical actuation of reduced graphene oxide (rGO) papers via fine tuning the oxygen functional groups in rGO sheets, which was achieved by careful control of quantity of the reduction agent used in the chemical reduction process of graphene oxide. The actuation strains are enhanced up to 0.2% at an applied voltage of 1 V, which is more than a 2 fold increase compared to the regular pristine rGO paper. Further theoretical and experimental analyses reveal that the change of the capacitance and the stiffness of the rGO papers are two key factors responsible for the observed improvement.

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