Title :
Modeling sensor behavior of CNT/polymer nanocomposite
Author :
Gong, Shuxi ; Zhu, Z.H.
Author_Institution :
Dept. of Earth & Space Sci. & Eng., York Univ., Toronto, ON, Canada
Abstract :
This work investigates the electric conductivity and sensor behavior of CNT/polymer nanocomposite using a 3-dimensional CNT percolating network model, where the CNTs are allowed to deform and bend at crossed junctions of nanotubes. The comparison of the numerical results and experimental data showed a reasonably good agreement. Monte Carlo simulation reveal that besides tunneling resistance, deformation-induced resistance also plays a significant role in both electrical conductivity and sensor behavior of CNT/polymer composites. In our physics-based model, working mechanisms for high sensitivity at low CNT loading and asymmetric sensor behavior between tensile and compress strains were discussed.
Keywords :
Monte Carlo methods; bending; carbon nanotubes; electrical conductivity; electrical resistivity; filled polymers; nanocomposites; nanosensors; percolation; tunnelling; 3-dimensional CNT percolating network model; C; CNT loading; CNT-polymer nanocomposite; Monte Carlo simulation; asymmetric sensor behavior; bending; compress strains; crossed junctions; deformation-induced resistance; electrical conductivity; physics-based model; tensile strains; tunneling resistance; Carbon nanotubes; Conductivity; Junctions; Polymers; Resistance; Strain; Tunneling;
Conference_Titel :
Nanotechnology (IEEE-NANO), 2014 IEEE 14th International Conference on
Conference_Location :
Toronto, ON
DOI :
10.1109/NANO.2014.6968167
