Charge-induced electrochemical actuation of armchair carbon nanotube bundles. (July 2017)

• Record Type: Journal Article
• Authors: Hung, Nguyen T.; Nugraha, Ahmad R.T.; Saito, Riichiro
• Is Part Of: Carbon. Volume 118(2017)
• Page Start: 278
• Page End: 284
• Publication Date: 2017-07
• Subjects: Carbon -- Periodicals; Carbone -- Périodiques; Koolstof; Toepassingen; Electronic journals; 546.681
• DOI: 10.1016/j.carbon.2017.03.036
• Languages: English
• ISSNs: 0008-6223

Abstract

Abstract: The effects of charge doping on the structural deformation and on the electronic structure of armchair single wall carbon nanotube (SWNT) bundles are investigated through first-principles calculations. In particular, we select a ( 6, 6 ) SWNT as an example and we calculate a mechanical deformation in the SWNT bundles as a function of gate voltage, which could serve as a basis of the electromechanical actuators in an artificial muscle. We find that the magnitudes of the actuation responses such as strain and stress of the ( 6, 6 ) SWNT bundle in the case of hole doping are substantially larger than those of electron doping. The ( 6, 6 ) SWNT bundle also exhibits a low-symmetry and opens an energy band gap of about 0.41 eV around the charge neutral condition, which allows a semiconductor-to-metal transition in the electron-doping regime when the relative shift of the Fermi energy goes up to 0.60 eV, above which the Young modulus increases. Graphical abstract: