Recent progress in the fabrication of flexible materials for wearable sensors

Liu, Hengxin; Wang, Li; Lin, Guimei; Feng, Yu

doi:10.1039/d1bm01136g

Cited by 57 publications

(52 citation statements)

References 116 publications

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“…Both models can be used to describe how noble metal electrodes such as Pt and Au catalyze reactions. They, on the other hand, fail to explain glucose oxidation on transition metals such as Ni, Co, Cu, or metal-oxides [96]. Instead, under anodic bias, the metal-oxide with a lower oxidation number will undergo an additional oxidation process and attain a higher oxidation number.…”

Section: Signal Amplification Of Nanomaterialsmentioning

confidence: 98%

Comprehensive Review on Wearable Sweat-Glucose Sensors for Continuous Glucose Monitoring

Zafar

Channa

Jeoti

et al. 2022

Sensors

163

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The incidence of diabetes is increasing at an alarming rate, and regular glucose monitoring is critical in order to manage diabetes. Currently, glucose in the body is measured by an invasive method of blood sugar testing. Blood glucose (BG) monitoring devices measure the amount of sugar in a small sample of blood, usually drawn from pricking the fingertip, and placed on a disposable test strip. Therefore, there is a need for non-invasive continuous glucose monitoring, which is possible using a sweat sensor-based approach. As sweat sensors have garnered much interest in recent years, this study attempts to summarize recent developments in non-invasive continuous glucose monitoring using sweat sensors based on different approaches with an emphasis on the devices that can potentially be integrated into a wearable platform. Numerous research entities have been developing wearable sensors for continuous blood glucose monitoring, however, there are no commercially viable, non-invasive glucose monitors on the market at the moment. This review article provides the state-of-the-art in sweat glucose monitoring, particularly keeping in sight the prospect of its commercialization. The challenges relating to sweat collection, sweat sample degradation, person to person sweat amount variation, various detection methods, and their glucose detection sensitivity, and also the commercial viability are thoroughly covered.

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Section: Signal Amplification Of Nanomaterialsmentioning

confidence: 98%

Comprehensive Review on Wearable Sweat-Glucose Sensors for Continuous Glucose Monitoring

Zafar

Channa

Jeoti

et al. 2022

Sensors

163

View full text Add to dashboard Cite

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“…The commonly used materials include flexible polymers (such as polyester, polyethylenimine, and polyimide), stretchable elastomers ( polydimethylsiloxane (PDMS), styrene ethylene butylene styrene (SEBS), and thermo-plastic polyurethanes (TPU)) and breathable films ( paper, fabric). 16,17 The encapsulation layer is generally employed to avoid unexpected interference and achieve good stability. The crucial part of the wearable sensor is the active layer that utilizes the functional unit through physical or biochemical interactions for perceiving the biosignals.…”

Section: Yuanyuan Tianmentioning

confidence: 99%

Emerging biotransduction strategies on soft interfaces for biosensing

Tian

Cai

et al. 2023

Nanoscale

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“…In recent years, with the wide application of smart wearable devices in the fields of human motion detection, electronic skin, and soft robotics, flexible strain sensors have attracted great attention because of their ability to convert external mechanical deformation into electrical signals that can be monitored. [1][2][3][4][5][6] Compared with conventional elastomer-based conductors, conductive hydrogels have become one of the most promising materials in the field of flexible electronics due to their excellent biocompatibility, tissue similarity, tunable mechanical and electrical properties, and simple fabrication process. 5,7,8 Despite the rapid development of hydrogel-based strain sensors, there are still great opportunities and challenges in the mechanical properties, electrical conductivity, and multi-functionality of current conductive hydrogels.…”

Section: Introductionmentioning

confidence: 99%

Preparation and properties of cellulose nanofibers/α‐zirconium phosphate nanosheets composite polyvinyl alcohol ion‐conductive organohydrogel and its application in strain sensors

Liu

Qin

Wang

et al. 2022

J of Applied Polymer Sci

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The poor mechanical and electrical properties and single function of conventional conductive hydrogels severely limit their application in flexible sensors. Here, a multifunctional nanomaterial composite high-strength hydrogel strain sensor was prepared by incorporating α-zirconium phosphate (α-ZrP) nanosheets with hydroxyl functional groups on the surface and cellulose nanofibers (CNFs) into a poly(vinyl alcohol) (PVA)matrix simultaneously, using a binary glycerol/water solution as the dispersion medium and a strategy of cyclic freeze-thawing followed by sodium chloride immersion. The experiments showed that CNFs and α-ZrP nanosheets can form hydrogen bonding interactions with PVA chains, which can synergistically improve the mechanical and electrical properties of the gels with little effect on its transparency, and the tensile strength and elongation at break of the gels can reach 2.42 MPa and 541%, respectively, and the ionic conductivity exceeds 7.65 mS/cm, while possessing a transmission rate of 87% at 600 nm visible light wavelength. In addition, the introduction of glycerol imparts the gel with remodeling, anti-freezing, and long-term stability. As a strain sensor, it has a linear sensing range of 0%-350% and high sensitivity (GF = 2.46), and the sensing gloves prepared based on it can accurately and stably recognize letters written by hand.

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Recent progress in the fabrication of flexible materials for wearable sensors

Abstract: The latest progress relating to the fabrication of materials for wearable sensors, including flexible materials, electrode materials, and new biodegradable materials, is reviewed. We think flexible materials will have broad application prospects.

Cited by 57 publications

References 116 publications

Comprehensive Review on Wearable Sweat-Glucose Sensors for Continuous Glucose Monitoring

Comprehensive Review on Wearable Sweat-Glucose Sensors for Continuous Glucose Monitoring

Emerging biotransduction strategies on soft interfaces for biosensing

Preparation and properties of cellulose nanofibers/α‐zirconium phosphate nanosheets composite polyvinyl alcohol ion‐conductive organohydrogel and its application in strain sensors

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