Emerging flexible sensors based on nanomaterials: recent status and applications

Wen, Nan; Zhang, Lu; Jiang, Dawei; Wu, Zijian; Li, Bin; Sun, Ce; Guo, Zhanhu

doi:10.1039/d0ta09556g

Cited by 138 publications

(100 citation statements)

References 176 publications

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“…Polyvinylidene fluoride (PVDF) is the right material for sensing elements in biomedical catheters because of its remarkable piezoelectric properties [ 137 , 138 , 139 ]. Electrospun PVDF sensors have been used as part of the catheter to minimize complications after surgeries [ 140 ] and to define the real-time flow in a medical catheter [ 141 ].…”

Section: Organic Piezoelectric Materialsmentioning

confidence: 99%

Progress in the Applications of Smart Piezoelectric Materials for Medical Devices

2020

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Smart piezoelectric materials are of great interest due to their unique properties. Piezoelectric materials can transform mechanical energy into electricity and vice versa. There are mono and polycrystals (piezoceramics), polymers, and composites in the group of piezoelectric materials. Recent years show progress in the applications of piezoelectric materials in biomedical devices due to their biocompatibility and biodegradability. Medical devices such as actuators and sensors, energy harvesting devices, and active scaffolds for neural tissue engineering are continually explored. Sensors and actuators from piezoelectric materials can convert flow rate, pressure, etc., to generate energy or consume it. This paper consists of using smart materials to design medical devices and provide a greater understanding of the piezoelectric effect in the medical industry presently. A greater understanding of piezoelectricity is necessary regarding the future development and industry challenges.

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Section: Organic Piezoelectric Materialsmentioning

confidence: 99%

Progress in the Applications of Smart Piezoelectric Materials for Medical Devices

2020

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“…The current research area involves enhancing the materials used in fabricating these sensors. These include nanomaterials such as graphene [12], [19], carbon nanoparticles, MXene [21], cellulose nanocrystals [21], copper nanowire [22], silicon nanomembranes [19], cellulose nanofibrils [5], silver nanomaterials [3], [23], gold nanoparticles [3], nickel nanoparticles [24], and polymers including polyimide, kapton [12], polyglycerol sebacate [25], polyethylene glycol, polyvinyl alcohol [26], polydimethylsiloxane (PDMS), polyurethane (PU), polyethylene terephthalate and hydrogels [26]. Biocompatibility and disposal after use remains an issue in the flexible sensor research.…”

Section: Pressure Sensorsmentioning

confidence: 99%

“…In a review paper on recent research in flexible sensors based on nanomaterial that was published in 2020 [3], the uses of flexible sensors were explored including biomedicine, smart devices, environmental monitoring and automobile manufacturing. Practical example of uses of flexible sensors were mentioned including sensors for monitoring glucose [42] and pulse [43].…”

Section: Related Workmentioning

confidence: 99%

“…Polymers are the most used pliable material in flexible sensors due to their high flexibility yet resilience under bending stresses and their ease of fabrication. However, most polymers do not have the required electrical properties for the fabrication of electronics such as health monitoring devices and environmental monitoring devices [3] whereby high sensitivity and conductivity is required. Most efforts in the research of flexible sensors is centred on enhancing the flexibility and conductivity of the materials used in the fabrication.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Review of Materials and Fabrication Methods for Flexible Nano and Micro-Scale Physical Property Sensors

Nyabadza¹,

Vázquez²,

Coyle³

et al. 2021

Preprint

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The use of flexible sensors has tripled over the last decade due to the increased demand in various fields including health monitoring, food packaging, electronic skins and soft robotics. Flexible sensors have the ability to be bent and stretched during use and can still maintain their electrical and mechanical properties. This gives them an advantage over rigid sensors that lose their sensitivity when subject to bending. Advancements in 3D printing have enabled the development of tailored flexible sensors. Various additive manufacturing methods are being used to develop these sensors including inkjet printing, aerosol jet printing, fused deposition modelling, direct ink writing, selective laser melting and others. Hydrogels have gained much attention in the literature due to their self-healing and shape transforming. Self-healing enables the sensor to recover from damages such as cracks and cuts incurred during use and this enables the sensor to have a longer operating life and stability. Various polymers are used as substrates on which the sensing conductive material is placed. Polymers including polydimethylsiloxane (PDMS), polyvinyl acetate (PVA), and Kapton are extensively used in flexible sensors. The most widely used nanomaterials in flexible sensors are carbon and silver, however, other nanomaterials such as iron, copper, manganese dioxide and gold are also used to provide controlled levels of conductivity or other functional properties.

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“…These factors make this polymer ideal for use in critical applications like aerospace aviation and forming laminating resins and high-temperature structural adhesives. PVC might not be as strong as PI in terms of mechanical tear or heat stability, but its easy welding nature has led the researchers to ingrate it with different kinds of nanomaterials for forming flexible sensors [ 29 ]. This material has been used to form sensors that are not subjected to fire as a result of the emission of toxic fumes.…”

Section: Introductionmentioning

confidence: 99%

Multi-Walled Carbon Nanotubes-Based Sensors for Strain Sensing Applications

Nag

Alahi

Mukhopadhyay

et al. 2021

Sensors

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The use of multi-walled carbon nanotube (MWCNT)-based sensors for strain–strain applications is showcased in this paper. Extensive use of MWCNTs has been done for the fabrication and implementation of flexible sensors due to their enhanced electrical, mechanical, and thermal properties. These nanotubes have been deployed both in pure and composite forms for obtaining highly efficient sensors in terms of sensitivity, robustness, and longevity. Among the wide range of applications that MWCNTs have been exploited for, strain-sensing has been one of the most popular ones due to the high mechanical flexibility of these carbon allotropes. The MWCNT-based sensors have been able to deduce a broad spectrum of macro- and micro-scaled tensions through structural changes. This paper highlights some of the well-approved conjugations of MWCNTs with different kinds of polymers and other conductive nanomaterials to form the electrodes of the strain sensors. It also underlines some of the measures that can be taken in the future to improve the quality of these MWCNT-based sensors for strain-related applications.

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Emerging flexible sensors based on nanomaterials: recent status and applications

Abstract: The flexible materials, nanomaterials, and fabrication strategy of flexible sensors with stretchable and self-healing properties were reviewed.

Cited by 138 publications

References 176 publications

Progress in the Applications of Smart Piezoelectric Materials for Medical Devices

Progress in the Applications of Smart Piezoelectric Materials for Medical Devices

Review of Materials and Fabrication Methods for Flexible Nano and Micro-Scale Physical Property Sensors

Multi-Walled Carbon Nanotubes-Based Sensors for Strain Sensing Applications

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