Sensitive electromechanical sensors using viscoelastic graphene-polymer nanocomposites

@article{Boland2016SensitiveES,
  title={Sensitive electromechanical sensors using viscoelastic graphene-polymer nanocomposites},
  author={Conor S. Boland and Umar Saeed Khan and Gavin Ryan and Sebastian T. Barwich and Romina Charifou and Andrew Harvey and Claudia Backes and Zheling Li and Mauro S. Ferreira and Matthias E. M{\"o}bius and Robert J. Young and Jonathan N. Coleman},
  journal={Science},
  year={2016},
  volume={354},
  pages={1257 - 1260}
}
Super sensitive, not so silly, putty Many composites blend stiff materials, such as glass or carbon fibers, into a softer elastic polymer matrix to generate a material with better overall mechanical toughness. Boland et al. added graphene to a lightly cross-linked silicone polymer (also known as Silly Putty). The resulting composite has unusual mechanical properties, allowing the manufacture of strain sensors that can detect respiration and the footsteps of spiders. Science, this issue p. 1257… 
Thermoplastic Elastomer Systems Containing Carbon Nanofibers as Soft Piezoresistive Sensors
TLDR
This study investigates the morphological, mechanical, electrical, and electromechanical properties of CPNs generated from thermoplastic elastomer (TPE) triblock copolymer systems containing vapor-grown carbon nanofiber (CNF).
Highly compressible graphene/polyurethane sponge with linear and dynamic piezoresistive behavior
A high-elastic graphene/polyurethane (PU) nanocomposite with excellent electromechanical properties was fabricated by a facile ice-templated assembly strategy. The resulting PU-reinforced graphene
Beyond Chemistry: Tailoring Stiffness and Microarchitecture to Engineer Highly Sensitive Biphasic Elastomeric Piezoresistive Sensors.
TLDR
The approach described is cost-effective and extremely versatile, by which one can fabricate piezoresistive sensors with adaptable sensitivity ranges and excellent high strain gauge factor with the underlying microarchitecture and insulant stiffness dictating this performance.
Coaxial carbon nanotube/polymer fibers as wearable piezoresistive sensors
Negative Gauge Factor Piezoresistive Composites Based on Polymers Filled with MoS2 Nanosheets.
TLDR
Doping of the MoS2 by the PEO yields nanocomposites which are conductive enough to act as sensors, while efficient stress transfer leads to nanosheet deformation in response to an external strain.
Novel Electrically Conductive Porous PDMS/Carbon Nanofiber Composites for Deformable Strain Sensors and Conductors.
TLDR
Tunable sensitivity and conductivity endow these highly stretchable nanocomposites with considerable potential for use as flexible strain sensors for monitoring the movement of human joints and also as flexible conductors for wearable electronics (where a relatively low gauge factor is required).
Energy-dissipative dual-crosslinked hydrogels for dynamically super-tough sensors
In the fields of electronic skin and soft wearable sensors, intrinsically stretchable conductors undergo rapid development; however, practical applications of artificial skinlike materials/devices
Ultrasensitive Strain Gauges Enabled by Graphene‐Stabilized Silicone Emulsions
Here, an approach is presented to incorporate graphene nanosheets into a silicone rubber matrix via solid stabilization of oil‐in‐water emulsions. These emulsions can be cured into discrete,
...
...

References

SHOWING 1-10 OF 78 REFERENCES
Graphene-Elastomer Composites with Segregated Nanostructured Network for Liquid and Strain Sensing Application.
TLDR
Graphene-based elastomer composites with a segregated nanostructured graphene network were prepared by a novel and effective ice-templating strategy to highlight the potential applications of graphene-elastomer Composites with an effective segregated network as multifunctional sensing materials.
Electrically conductive thermoplastic elastomer nanocomposites at ultralow graphene loading levels for strain sensor applications
An electrically conductive ultralow percolation threshold of 0.1 wt% graphene was observed in the thermoplastic polyurethane (TPU) nanocomposites. The homogeneously dispersed graphene effectively
Piezoresistive response of Pluronic-wrapped single-wall carbon nanotube–epoxy composites
This article reports on the piezoresistive behaviour of polymer-based nanocomposites, which are composed of epoxy resins and Pluronic-wrapped carbon nanotubes. The samples were prepared with carbon
Fabrication and property prediction of conductive and strain sensing TPU/CNT nanocomposite fibres
In this study, thermoplastic polyurethane (TPU) fibres containing multi-walled carbon nanotubes (MWNTs) and fabricated via an extrusion process were demonstrated to possess a tuneable level of
Electromechanical piezoresistive sensing in suspended graphene membranes.
TLDR
This work conclusively demonstrate the piezoresistive effect in graphene in a nanoelectromechanical membrane configuration that provides direct electrical readout of pressure to strain transduction and acts as a strain gauge independent of crystallographic orientation.
The piezoresistive effect in polypropylene—carbon nanofibre composites obtained by shear extrusion
The piezoresistive effect on poly(propylene) (PP)–carbon nanofibre (CNF) composites fabricated by twin-screw extrusion and compression moulding has been investigated. The electrical and mechanical
...
...