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• W1539573663 abstract "Graphene nanomesh, with high density arrays of holes to mimic interconnected nanoribbon networks, opens up enormous potential for applications in electronics. It has been shown in the literature that the graphene nanomesh is able to sustain two orders of magnitude larger amount of current than the individual graphene nanoribbons and the on/off ratio can be easily tuned through varying the neck width. The mechanical and fracture properties which are extremely important for the design of the nanotransistors, remains unexplored so far. In this study we symmetrically investigated the fracture properties of graphene nanomesh under uniaxial tension by molecular dynamics simulation. The effects of the graphene size and the hole diameter on the mechanical properties of graphene nanomesh have been analyzed. It has shown that the presence of holes can significantly deteriorate the fracture strength compared to the perfect graphene; however, its effect on the Young’s modulus is quite limited. The ratio of the hole to system size appears not to be the factor weakening the fracture strength of the graphene nanomesh. Introduction Graphene, one-atom-thick planar sheet of sp-bonded carbon atoms that are densely packed in a honeycomb crystal lattice, possesses many superior properties, such as mechanical, thermal and electrical properties [1]-[3]. Graphene has significant potential for application in electronics, such as graphene-based field-effect transistors which have been developed quickly and considered as a candidate material for post-silicon age. But the nature of semimetal with zero bandgap prevents its applications in transistors at room temperature [4]. Graphene nanoribbons with well-defined widths and specific edges open up a band-gap that is large enough for transistor operation, but these nanoribbon devices often have low driving currents or transconductances [5]. However, a new graphene nanostructure, so-called graphene nanomesh, with high density array of nanoholes etched into graphene to mimic interconnected graphene nanoribbon networks [6]-[8], which can open a band-gap in a large sheet of graphene to create a semiconducting thin film. The Graphene nanomesh based field-effect transistors can sustain currents nearly two orders of magnitude larger than an individual graphene nanoribbon and the on-off ratio can be easily tuned by changing the neck width. Both experimental and simulation studies have demonstrated that graphene is the strongest materials with Young’s modulus of nearly 1TPa and fracture strength of more than 100GPa [9][10]. These measurements, simulations and calculations indicate that the zigzag edge graphene has much higher fracture strength and strain than the armchair one, considering that the range of the bond angle variation in zigzag edge graphene is much larger than that in armchair one, as shown in Fig. 1. However, the mechanical properties of graphene nanomesh remain unexplored. Understanding the mechanical properties of the graphene nanomesh is of great importance for their utilization in nanoelectromechanical system. zigzag direction(ZZ) armchair direction(AM)" @default.
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• W1539573663 date "2013-02-22" @default.
• W1539573663 modified "2023-09-27" @default.
• W1539573663 title "Effect of Hole Size on the Fracture of Graphene Nanomesh" @default.
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