Wearable rGO-Ag NW@cotton fiber piezoresistive sensor based on the fast charge transport channel provided by Ag nanowire

Cao, Minghui; Wang, Minqiang; Li, Le; Qiu, Hengwei; Padhiar, Muhammad Amin; Yang, Zhi

doi:10.1016/j.nanoen.2018.05.038

Cited by 97 publications

(74 citation statements)

References 38 publications

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“…Such properties are fundamental to the generation of free radicals that effect an antibacterial function. Thus, rGO presence, both in conjunction with AgNP, as well as on its own (to a lesser degree), inhibits growth of gram negative bacteria and also allows avoidance of oxidation by air, which enhances the stability in line with previous reports [146,147]. Alternatively, the higher loading of AgNP, and/or the presence of smaller, less agglomerated AgNP, as obtained here, enhances the known antimicrobial properties of silver, inactivating bacteria via the interaction with bacterial protein and enzymatic thiol groups [148,149].…”

Section: Antimicrobial Properties Testingsupporting

confidence: 86%

Durable Antimicrobial Behaviour from Silver-Graphene Coated Medical Textile Composites

et al. 2019

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Silver nanoparticle (AgNP) and AgNP/reduced graphene oxide (rGO) nanocomposite impregnated medical grade polyviscose textile pads were formed using a facile, surface-mediated wet chemical solution-dipping process, without further annealing. Surfaces were sequentially treated in situ with a sodium borohydride (NaBH4) reducing agent, prior to formation, deposition, and fixation of Ag nanostructures and/or rGO nanosheets throughout porous non-woven (i.e., randomly interwoven) fibrous scaffolds. There was no need for stabilising agent use. The surface morphology of the treated fabrics and the reaction mechanism were characterised by Fourier transform infrared (FTIR) spectra, ultraviolet-visible (UV–Vis) absorption spectra, X-ray diffraction (XRD), Raman spectroscopy, dynamic light scattering (DLS) energy-dispersive X-ray analysis (EDS), and scanning electron microscopic (SEM). XRD and EDS confirmed the presence of pure-phase metallic silver. Variation of reducing agent concentration allowed control over characteristic plasmon absorption of AgNP while SEM imaging, EDS, and DLS confirmed the presence of and dispersion of Ag particles, with smaller agglomerates existing with concurrent rGO use, which also coincided with enhanced AgNP loading. The composites demonstrated potent antimicrobial activity against the clinically relevant gram-negative Escherichia coli (a key causative bacterial agent of healthcare-associated infections; HAIs). The best antibacterial rate achieved for treated substrates was 100% with only a slight decrease (to 90.1%) after 12 equivalent laundering cycles of standard washing. Investigation of silver ion release behaviours through inductively coupled plasmon optical emission spectroscopy (ICP-OES) and laundering durability tests showed that AgNP adhesion was aided by the presence of the rGO host matrix allowing for robust immobilisation of silver nanostructures with relatively high stability, which offered a rapid, convenient, scalable route to conformal NP–decorated and nanocomposite soft matter coatings.

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Section: Antimicrobial Properties Testingsupporting

confidence: 86%

Durable Antimicrobial Behaviour from Silver-Graphene Coated Medical Textile Composites

et al. 2019

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“…As shown in Figure d, the Nyquist plots of the different inks all exhibit similar curves, including a squashed semicircle in the high frequency region, and an approximately vertical line in the low‐frequency region. In the high frequency region, the diameters of the semicircle for the M‐A MSC, R‐M‐A MSC and R@M‐A 0.75:1 MSC are smaller than that of the pure MXene MSC, indicating that the charge transfer resistance ( R ct ) was decreased and the ionic conductivity improved after the embedding of the AgNWs . In addition, the slopes of the plots in the low‐frequency regions of M‐A MSC, R‐M‐A MSC, and R@M‐A 0.75:1 MSC are significantly greater than that of the MXene MSC, indicating their lower diffusion resistances .…”

Section: Resultsmentioning

confidence: 98%

Hydrous RuO₂‐Decorated MXene Coordinating with Silver Nanowire Inks Enabling Fully Printed Micro‐Supercapacitors with Extraordinary Volumetric Performance

Liu

Liang

et al. 2019

Advanced Energy Materials

216

156

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The fabrication of fully printable, flexible micro‐supercapacitors (MSCs) with high energy and power density remains a significant technological hurdle. To overcome this grand challenge, the 2D material MXene has garnered significant attention for its application, among others, as a printable electrode material for high performing electrochemical energy storage devices. Herein, a facile and in situ process is proposed to homogeneously anchor hydrous ruthenium oxide (RuO2) nanoparticles on Ti3C2Tx MXene nanosheets. The resulting RuO2@MXene nanosheets can associate with silver nanowires (AgNWs) to serve as a printable electrode with micrometer‐scale resolution for high performing, fully printed MSCs. In this printed nanocomposite electrode, the RuO2 nanoparticles contribute high pseudocapacitance while preventing the MXene nanosheets from restacking, ensuring an effective ion highway for electrolyte ions. The AgNWs coordinate with the RuO2@MXene to guarantee the rheological property of the electrode ink, and provide a highly conductive network architecture for rapid charge transport. As a result, MSCs printed from the nanocomposite inks demonstrate volumetric capacitances of 864.2 F cm−3 at 1 mV s−1, long‐term cycling performance (90% retention after 10 000 cycles), good rate capability (304.0 F cm−3 at 2000 mV s−1), outstanding flexibility, remarkable energy (13.5 mWh cm−3) and power density (48.5 W cm−3).

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“…Graphene, carbon nanotubes, conducting polymer, metal nanowires, and metal nanomaterials have shown to be promising building blocks to increase the conductivity of the devices extensively [26][27][28]. In particular, a silver nanowire, which is a unique conductive nanomaterial with high conductivity and feasibility of large-scale production, has been studied as one of the most promising flexible conducting materials for flexible strain sensors [28][29][30]. However, several challenging issues also remain.…”

Section: Introductionmentioning

confidence: 99%

Facile Preparation of Highly Stretchable TPU/Ag Nanowire Strain Sensor with Spring-Like Configuration

Pan

Wang

et al. 2020

Polymers

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Stretchable nano-fibers have attracted dramatic attention for the utility in wearable and flexible electronics. In the present case, Ag nanowires (AgNWs)-intertwined thermoplastic polyurethanes (TPU) unwoven nano-membrane is fabricated by an electrospinning method and dip coating technique. Then a strain sensor with a spring-like configuration is fabricated by a twisted method. The sensor exhibits superior electrical conductivity up to 3990 S·cm−1 due to the high weight percentage of the Ag nanowires. Additionally, thanks to the free-standing spring-like configuration that consists of uniform neat loops, the strain sensor can detect a superior strain up to 900% at the point the sensor ruptures. On the other hand, the configuration can mostly protect the AgNWs from falling off. Furthermore, major human motion detection, like movement of a human forefinger, and minor human motion detection, such as a wrist pulse, show the possible application of the sensor in the field of flexible electronics.

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Wearable rGO-Ag NW@cotton fiber piezoresistive sensor based on the fast charge transport channel provided by Ag nanowire

Cited by 97 publications

References 38 publications

Durable Antimicrobial Behaviour from Silver-Graphene Coated Medical Textile Composites

Durable Antimicrobial Behaviour from Silver-Graphene Coated Medical Textile Composites

Hydrous RuO₂‐Decorated MXene Coordinating with Silver Nanowire Inks Enabling Fully Printed Micro‐Supercapacitors with Extraordinary Volumetric Performance

Facile Preparation of Highly Stretchable TPU/Ag Nanowire Strain Sensor with Spring-Like Configuration

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Wearable rGO-Ag NW@cotton fiber piezoresistive sensor based on the fast charge transport channel provided by Ag nanowire

Cited by 97 publications

References 38 publications

Durable Antimicrobial Behaviour from Silver-Graphene Coated Medical Textile Composites

Durable Antimicrobial Behaviour from Silver-Graphene Coated Medical Textile Composites

Hydrous RuO2‐Decorated MXene Coordinating with Silver Nanowire Inks Enabling Fully Printed Micro‐Supercapacitors with Extraordinary Volumetric Performance

Facile Preparation of Highly Stretchable TPU/Ag Nanowire Strain Sensor with Spring-Like Configuration

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Product

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Hydrous RuO₂‐Decorated MXene Coordinating with Silver Nanowire Inks Enabling Fully Printed Micro‐Supercapacitors with Extraordinary Volumetric Performance