Abstract:Weavable sensing fibers with superior mechanical strength and sensing functionality are crucial for the realization of wearable textile sensors. However, in the fabrication of previously reported wearable sensing fibers, additional processes such as reduction, doping, and coating were essential to satisfy both requirements. The sensing fibers should be continuously synthesized in a scalable process for commercial applications with high reliability and productivity, which was challenging. In this study, we firs… Show more
“…For a wearable sensing platform, Cho et al. [ 199 ] fabricated mass‐producible, meter‐scale scalable, weavable fiber consisting of nanocellulose extracted from tunicate (TCNF) and SWCNTs composite. Due to the presence of hydroxyl functional groups on the fibers, NO 2 is actively adsorbed on the surface of the TCNF fiber, while the CNT bundles provide a percolation path to the charge carriers for transportation to the TCNF fiber.…”
Section: Applications Of the Wearable Gas Sensorsmentioning
In the era of the Internet of Things, wearable technologies are expected to become an indispensable part of daily life. In recent times, highly sensitive, flexible, and stretchable electronic gas sensors are gaining tremendous interest due to their applicability in wearable electronics applications. The construction of wearable gas sensors are reviewed for real‐time, highly sensitive, and selective detection of hazardous gases at room temperature (RT) that can be laminated onto a human body or integrated with body‐worn textile or other consumer products, utilizing carbon nanomaterials, conductive polymers, 2D nanostructured materials, and their composites. Sensing materials, transduction techniques, and substrates for high‐performance wearable gas sensing are discussed in detail. The critical challenges for future development of wearable gas sensors are presented. Wearable gas sensors are believed to have great potential in environmental monitoring, healthcare, public safety, security, as well as food quality monitoring.
“…For a wearable sensing platform, Cho et al. [ 199 ] fabricated mass‐producible, meter‐scale scalable, weavable fiber consisting of nanocellulose extracted from tunicate (TCNF) and SWCNTs composite. Due to the presence of hydroxyl functional groups on the fibers, NO 2 is actively adsorbed on the surface of the TCNF fiber, while the CNT bundles provide a percolation path to the charge carriers for transportation to the TCNF fiber.…”
Section: Applications Of the Wearable Gas Sensorsmentioning
In the era of the Internet of Things, wearable technologies are expected to become an indispensable part of daily life. In recent times, highly sensitive, flexible, and stretchable electronic gas sensors are gaining tremendous interest due to their applicability in wearable electronics applications. The construction of wearable gas sensors are reviewed for real‐time, highly sensitive, and selective detection of hazardous gases at room temperature (RT) that can be laminated onto a human body or integrated with body‐worn textile or other consumer products, utilizing carbon nanomaterials, conductive polymers, 2D nanostructured materials, and their composites. Sensing materials, transduction techniques, and substrates for high‐performance wearable gas sensing are discussed in detail. The critical challenges for future development of wearable gas sensors are presented. Wearable gas sensors are believed to have great potential in environmental monitoring, healthcare, public safety, security, as well as food quality monitoring.
“…An oxygen biosensor powered by a biofuel cell containing MWNCTs, a nanocellulose/polypyrrole composite, laccase and fructose dehydrogenase, was mentioned above [84]. Versatile wearable textile sensors, e.g., for gas sensing, were produced from cellulose nanofibers extracted from tunicates, homogeneously composited with SWCNTs, by wet spinning in an aligned direction [60].…”
Section: Biomedical Application Of Nanocellulose/cnt Compositesmentioning
Nanocellulose/nanocarbon composites are newly emerging smart hybrid materials containing cellulose nanoparticles, such as nanofibrils and nanocrystals, and carbon nanoparticles, such as “classical” carbon allotropes (fullerenes, graphene, nanotubes and nanodiamonds), or other carbon nanostructures (carbon nanofibers, carbon quantum dots, activated carbon and carbon black). The nanocellulose component acts as a dispersing agent and homogeneously distributes the carbon nanoparticles in an aqueous environment. Nanocellulose/nanocarbon composites can be prepared with many advantageous properties, such as high mechanical strength, flexibility, stretchability, tunable thermal and electrical conductivity, tunable optical transparency, photodynamic and photothermal activity, nanoporous character and high adsorption capacity. They are therefore promising for a wide range of industrial applications, such as energy generation, storage and conversion, water purification, food packaging, construction of fire retardants and shape memory devices. They also hold great promise for biomedical applications, such as radical scavenging, photodynamic and photothermal therapy of tumors and microbial infections, drug delivery, biosensorics, isolation of various biomolecules, electrical stimulation of damaged tissues (e.g., cardiac, neural), neural and bone tissue engineering, engineering of blood vessels and advanced wound dressing, e.g., with antimicrobial and antitumor activity. However, the potential cytotoxicity and immunogenicity of the composites and their components must also be taken into account.
“…It has the advantages of being weavable with conventional textiles and having good mechanical resilience to harsh conditions such as deformation, stretching, and twisting. Nanofibers can be fabricated with a variety of processes, including wet, dry, and electrospinning processes . A wet‐spinning process was used to form cellulose/CNT nanofibers.…”
Section: Other Fabrication Techniquesmentioning
confidence: 99%
“…Wet spinning process for fabrication of nanocellulose/CNT fibers: a) nanocellulose fibers mixed with CNTs are injected in a syringe and precipitated in a coagulation bath, forming a conductive fiber, b) The meter‐scale fiber, c) the response of the sensor to increasing NO 2 concentration, d) test showing strength of the fibers, e) scanning electron microscopy (SEM) image depicting TCNF/CNT fiber, and f) surface area measurement of the fibers. Reproduced with permission . Copyright 2019, American Chemical Society.…”
Flexible sensors composed of carbon nanostructures and elastic materials have been developed for healthcare monitoring, environmental monitoring, disposable biochemical or electrochemical sensors, and many other applications. Fabrication approaches for such sensors and their advantages and current issues related to patterning high-performance flexible sensors are reviewed. A focus is placed on patterning techniques for carbon-based flexible sensors including carbon nanotubes, graphene, and other carbon nanostructures. First, novel patterning techniques for nanomaterials are described, along with their current challenges. Next, emerging flexible sensors including humidity, temperature, strain, and pressure sensors are discussed. Finally, the challenges and perspectives for flexible sensors are addressed. REVIEW www.advintellsyst.com
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