Nano Archive

Electrical and electromechanical characteristics of self-assembled carbon nanotube thin films on flexible substrates

Xue, Wei and Cui, Tianhong (2008) Electrical and electromechanical characteristics of self-assembled carbon nanotube thin films on flexible substrates. Sensors and Actuators A: Physical, 145-146 . 330 - 335.

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Official URL: http://www.sciencedirect.com/science/article/B6THG...

Abstract

We report the fabrication and characterization of layer-by-layer self-assembled single-walled carbon nanotube (SWNT) thin films on plastic substrates. The SWNT multilayers are alternating layers of SWNTs and poly(dimethyldiallylammonium chloride) (PDDA). The SWNTs are deposited on the pre-patterned gold electrodes and measured as thin-film resistors. The resistance of the SWNT thin film decreases when the number of assembled SWNT layers increases. The SWNT layers are modeled as a set of resistors in parallel with a “base” resistor and “layer” resistors. The flexibility of the polymer substrate allows high bending angles. We discovered that increasing the substrate bending angle greatly decreases the resistance of the SWNT thin film. For thin-film resistors (length: 2.8 cm) containing 14 and 16 SWNT layers, the resistance changes are measured as −38.2% and −47.1% at a bending height of 1 cm. The observed “piezoresistive” phenomenon of the assembled SWNT thin films creates opportunities for highly sensitive sensors and electronic devices in many areas.

Item Type:Article
Additional Information:Special Issue: Transducers/07 Eurosensors XXI, The 14th International Conference on Solid State Sensors, Actuators and Microsystems and the 21st European Conference on Solid-State Transducers, The 14th International Conference on Solid State Sensors, Actuators and Microsystems and the 21st European Conference on Solid-State Transducers
Uncontrolled Keywords:Single-walled carbon nanotube (SWNT); Thin film; Layer-by-layer (LbL) self-assembly; Flexible substrates
Subjects:Material Science > Nanofabrication processes and tools
Analytical Science > Nanotechnology for sensing and actuating
Material Science > Nanostructured materials
ID Code:4940
Deposited By:SPI
Deposited On:09 Apr 2009 12:55
Last Modified:09 Apr 2009 12:55

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