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Sensors 2014, 14(9), 17304-17312; doi:10.3390/s140917304

Screen-Printed Resistive Pressure Sensors Containing Graphene Nanoplatelets and Carbon Nanotubes

1
Institute of Metrology and Bioengineering, Faculty of Mechatronics, Warsaw University of Technology, A. Boboli 8 St., 02-525 Warsaw, Poland
2
Institute of Electronic Materials Technology, Wolczynska 133 St., 01-919 Warsaw, Poland
*
Author to whom correspondence should be addressed.
Received: 31 May 2014 / Revised: 25 July 2014 / Accepted: 18 August 2014 / Published: 16 September 2014
(This article belongs to the Special Issue Printed Sensors)
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Abstract

Polymer composites with nanomaterials such as graphene nanoplatelets and carbon nanotubes are a new group of materials with high application possibilities in printed and flexible electronics. In this study such carbon nanomaterials were used as a conductive phase in polymer composites. Pastes with dispersed nanomaterials in PMMA and PVDF vehicles were screen printed on flexible substrates, and used as an active layer in pressure sensors, exploiting contact resistance phenomena. The relationship between resistance and pressure is nearly linear on a logarithmic scale for selected types of samples, and their response is several times higher than for similar sensors with graphite layers. The use of surfactants allowed us to fabricate evenly dispersed nanomaterials with different amount of nanoplatelets and nanotubes in the composites. The samples contained from 1.25 wt.% to 2 wt.% of graphene and 1 wt.% to 0.5 wt.% of nanotubes and exhibited diverse sheet resistivity. Experiments revealed the relationship between morphology and loading of functional phase in the polymer matrix and the sensors’ sensitivity. View Full-Text
Keywords: pressure sensors; graphene nanoplatelets; carbon nanotubes; printed electronics; screen printing; nanomaterials pressure sensors; graphene nanoplatelets; carbon nanotubes; printed electronics; screen printing; nanomaterials
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Janczak, D.; Słoma, M.; Wróblewski, G.; Młożniak, A.; Jakubowska, M. Screen-Printed Resistive Pressure Sensors Containing Graphene Nanoplatelets and Carbon Nanotubes. Sensors 2014, 14, 17304-17312.

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