Flexible piezoresistive strain sensor based on CNTs–polymer composites: a brief review

Yi, Ying; Wang, Bo; Liu, Xingyue; Li, Changping

doi:10.1007/s42823-022-00320-2

Cited by 27 publications

(9 citation statements)

References 101 publications

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“…Similar to pressure-responsive IWDs, strain-responsive IWDs convert external stimuli caused by deformation into electrical signals and have received widespread attention due to their potential applications in humancomputer interfaces, human motion monitoring, etc. [184][185][186][187] The sensing mechanism of strain-responsive IWDs is generally resistive sensing, which can be attributed to its simple manufacturing process and high sensitivity, and has been widely used in the engineering field. 188,189 Resistive strain sensors are implemented by coupling nanomaterials to stretchable substrates to further enhance the sensitivity and the tensile performance of the flexible device.…”

Section: Mechanically Responsive Iwdsmentioning

confidence: 99%

Recent advances in the material design for intelligent wearable devices

Ye³

et al. 2023

Mater. Chem. Front.

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Section: Mechanically Responsive Iwdsmentioning

confidence: 99%

Recent advances in the material design for intelligent wearable devices

Ye³

et al. 2023

Mater. Chem. Front.

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Section: Introductionmentioning

confidence: 99%

“…Flexible piezoresistive sensors are usually made of an elastic substrate or matrix in combination with conductive fillers [ 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 ]. Conductive materials such as carbon black [ 12 ], metal nitrides/carbides (MXenes) [ 13 ], carbon nanotubes [ 14 ], carbon nanofibers (CNFs) [ 15 , 16 ], silver nanowires (AgNWs) [ 17 ] and gold nanowires [ 18 ], and graphene [ 19 ] are most commonly used. In particular, the one-dimensional conductive carbon nanomaterials (e.g., carbon nanotubes or nanofibers) were extensively studied due to their high electrical conductivity and mechanical properties, as well as high stability [ 20 ].…”

Section: Introductionmentioning

confidence: 99%

A Comparative Study on the Effects of Spray Coating Methods and Substrates on Polyurethane/Carbon Nanofiber Sensors

Karlapudi

Vahdani

Mirjalali

et al. 2023

Sensors

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Thermoplastic polyurethane (TPU) has been widely used as the elastic polymer substrate to be combined with conductive nanomaterials to develop stretchable strain sensors for a variety of applications such as health monitoring, smart robotics, and e-skins. However, little research has been reported on the effects of deposition methods and the form of TPU on their sensing performance. This study intends to design and fabricate a durable, stretchable sensor based on composites of thermoplastic polyurethane and carbon nanofibers (CNFs) by systematically investigating the influences of TPU substrates (i.e., either electrospun nanofibers or solid thin film) and spray coating methods (i.e., either air-spray or electro-spray). It is found that the sensors with electro-sprayed CNFs conductive sensing layers generally show a higher sensitivity, while the influence of the substrate is not significant and there is no clear and consistent trend. The sensor composed of a TPU solid thin film with electro-sprayed CNFs exhibits an optimal performance with a high sensitivity (gauge factor ~28.2) in a strain range of 0–80%, a high stretchability of up to 184%, and excellent durability. The potential application of these sensors in detecting body motions has been demonstrated, including finger and wrist-joint movements, by using a wooden hand.

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“…Carbon nanomaterials in different dimensions each have specific advantages. Zero-dimensional (0D) carbon nanoparticles [4], one-dimensional (1D) carbon nanotubes (CNTs) [5], and two-dimensional (2D) graphene nanosheets (GNPs) [6] are often widely used by us. In recent years, researchers have chosen a variety of methods in the research of flexible sensors based on carbon nanocomposites to achieve breakthroughs in material conductivity, improving sensitivity, ensuring stability, increasing measurement dimensions, and measuring functions [7][8].…”

Section: Introductionmentioning

confidence: 99%

Impedance characteristics of flexible strain sensors based on zero-dimensional carbon nanocomposites

Luo

et al. 2023

Third International Conference on Sensors and Information Technology (ICSI 2023)

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In recent years, researchers have used various methods to study flexible sensors based on carbon nanomaterials, among which impedance analysis has unique advantages in studying the sensor mechanism. In this paper, we investigated the impedance characteristics of a flexible zero-dimensional carbon nanocomposite strain sensor, establishing a simple electrical model by electrochemical impedance spectroscopy (EIS). Based on the model, the sensing mechanism of the flexible strain sensor was analyzed. The noise analysis theory of the flexible strain sensor was established, and it is proved that the noise of the sensor can be reduced significantly when an AC signal is applied, which will improve the accuracy of the sensor.

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Flexible piezoresistive strain sensor based on CNTs–polymer composites: a brief review

Cited by 27 publications

References 101 publications

Recent advances in the material design for intelligent wearable devices

Recent advances in the material design for intelligent wearable devices

A Comparative Study on the Effects of Spray Coating Methods and Substrates on Polyurethane/Carbon Nanofiber Sensors

Impedance characteristics of flexible strain sensors based on zero-dimensional carbon nanocomposites

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