Abstract
This study proposes a novel phononic-crystal acoustic wave device (AWD). A graphene atomic structure was adopted as the main research subject, and a graphene-like structure was designed using piezoelectric material ZnO and its periodic boundary conditions were defined using the finite element method (FEM). The study conducts acoustic-wave propagation analysis in the frequency domain on the 2D graphene-like structure according to Bloch theory to understand the band gap effects generated by its natural vibration. The effects of shape transformation from a hexagonal honeycomb structure into a regular polygon were also investigated regarding the band gap phenomenon. Thus, this study compared and analyzed numerous 2D polygonal graphene-like structures with a fixed bond diameter (d = 2R =0.7 mm), bonding stick width (0.2 mm), and side length (1 mm), and observed the trends of the band gap changes under natural vibration for designing an optimal AWD; the studied 2D polygonal models were a square, and a regular hexagon, octagon, and decagon.
Highlights
The development of nanomaterials has flourished over recent decades, and the most popular research subject is graphene
The band gap is categorized into a complete band gap, which inhibits the propagation of acoustic waves in all directions, and a directional band gap, which inhibits the propagation of acoustic waves only in a certain direction
This study focused on the use of graphene-like structures for developing new acoustic wave device (AWD)
Summary
The development of nanomaterials has flourished over recent decades, and the most popular research subject is graphene. Graphene is a flat monolayer film with a hexagonal honeycomb shape consisting of carbon atoms. Graphene was considered to be a hypothetical structure that could not exist independently until 2004, when two physicists from the University of Manchester, Andre Geim and Konstantin Novoselov, used the method of peeling with Scotch tape and obtained a 1-atom-thick graphene film [1] [2]. How to cite this paper: Huang, Z.-G. and Su, C.-F. Crystal Structure Theory and Applications, 3, 10-21. Su tance and low electrical resistance, the electron mobility of graphene is greater than that of silicon crystal; graphene can be employed to develop thinner electronic components and photonic devices with high conductivity [3]-[16]
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