Open AccessSensing characteristic of GPCs induced by sliding of graphene flakes
Author(s) -
Lirong Zheng,
Qian Yang
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/531/1/012075
Subject(s) - graphene , materials science , finite element method , affine transformation , composite material , deformation (meteorology) , transformation (genetics) , position (finance) , nanotechnology , geometry , mathematics , structural engineering , engineering , biochemistry , chemistry , finance , economics , gene
The main aim of this paper is to investigate the effect of slide between overlapped graphene flakes on the sensing characteristic of graphene-based polymer composites (GPCs). During deformation process of GPCs, the position of the graphene flakes can be determined by using an affine transformation. The analytical solution is obtained based on the equivalent resistance formulas of series and parallel circuits. Meanwhile, the numerical simulation is also conducted through the finite element method (FEM). In addition, the consistence between the analytical solution and numerical result are proved by a simple model consisted of two-layer graphene flakes. The result shows that the gauge factor (GF) of the sensor is related to both the initial resistance and the length of the graphene flakes: the GF of the sensor decreases with the increase of the initial resistance, while the effect of the length of graphene flakes is less. Moreover, the pre-stretched GPCs have a larger sensing range which can improve the usability of the sensor.