Charge-induced electromechanical actuation of two-dimensional hexagonal and pentagonal materials
Journal
Physical Chemistry Chemical Physics
Journal Volume
21
Journal Issue
40
Start Page
22377
End Page
22384
ISSN
14639084
14639076
Date Issued
2019
Author(s)
Abstract
Using first-principles calculations, we investigate electromechanical properties of two-dimensional (2D) hexagonal and pentagonal materials as a function of electron and hole dopings, in which 2D materials including graphene, chair-like graphane, table-like graphane, penta-graphene (PG), hydrogenated penta-graphene (HPG), and penta-CN2 are considered. We find that the actuation responses such as actuation strain, stress generated, and work area-density per cycle of the 2D materials in the case of hole doping are substantially larger than those of electron doping. Moreover, the electromechanical properties of the 2D materials can be improved by hydrogenation. In particular, the actuation strain and work area-density per cycle of graphane and HPG are much larger than those of graphene and PG for hole doping, respectively. Interestingly, both the 2D hexagonal and pentagonal materials show an asymmetric dependence of theoretical strength (a maximum value of the stress that the materials can achieve by applying the strain) on the electron and hole dopings. These results provide an important insight into the electromechanical properties of the 2D hexagonal and pentagonal materials, which are useful for artificial muscle applications.
Subjects
Calculations
Hydrogenation
Area Density
Artificial Muscle
Electro-mechanical Actuations
Electromechanical Property
Electron-doping
First-principles Calculation
Theoretical Strength
Two Dimensional (2 D)
Graphene
Publisher
Royal Society of Chemistry
Type
journal article