Fully embedded CuNWs/PDMS conductor with high oxidation resistance and high conductivity for stretchable electronics

Zhang, Bowen; Li, Wanli; Yang, Yang; Chen, Chuantong; Li, Caifu; Suganuma, Katsuaki

doi:10.1007/s10853-019-03333-x

Cited by 34 publications

(12 citation statements)

References 43 publications

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“…Other than EDA, other alkylamines, such as octadecylamine (ODA) or HDA, have been used as capping agents or even reducing agents for the synthesis of CuNWs in aqueous media [37,[58][59][60][61][62]. It was found that ODA could directly convert copper(II) ions into ultralong and uniform CuNWs with uniform and controllable diameters of 30-100 nm, length up to several millimeters (aspect ratio >10 5 ) by the hydrothermal processing of the complex emulsion of CuCl 2 and ODA at 120-180°C without the assistance of other reducing agents or surfactants.…”

Section: Copper Nanowiresmentioning

confidence: 99%

Copper nanomaterials and assemblies for soft electronics

Yang

Zhu

2019

Sci. China Mater.

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Soft electronics that can simultaneously offer electronic functions and the capability to be deformed into arbitrary shapes are becoming increasingly important for wearable and bio-implanted applications. The past decade has witnessed tremendous progress in this field with a myriad of achievements in the preparation of soft electronic conductors, semiconductors, and dielectrics. Among these materials, copper-based soft electronic materials have attracted considerable attention for their use in flexible or stretchable electrodes or interconnecting circuits due to their low cost and abundance with excellent optical, electrical and mechanical properties. In this review, we summarize the recent progress on these materials with the detailed discussions of the synthesis of copper nanomaterials, approaches for their assemblies, strategies to resist the ambient corrosion, and their applications in various fields including flexible electrodes, sensors, and other soft devices. We conclude our discussions with perspectives on the remaining challenges to make copper soft conductors available for more widespread applications.

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Section: Copper Nanowiresmentioning

confidence: 99%

Copper nanomaterials and assemblies for soft electronics

Yang

Zhu

2019

Sci. China Mater.

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“…[1][2][3] In recent years, many flexible 1D materials have emerged to replace brittle indium tin oxide (ITO) to improve the mechanical properties of flexible electrodes, such as nano wires, nanotubes, and graphenes. [4][5][6][7] Among these materials, silver nanowires (AgNWs) have great application prospects due to their compatibility with a solutionprocess, excellent photo electric performance, and mechanical toughness. [8][9][10][11] For prac tical application of AgNWs, the precise patterning of AgNWs is Some surface treatment combined with mask assisting method, such as thermally grown SiO 2 /Si wafer, oxygen plasma, or ultraviolet ozone treatment can create hydrophilic functional groups on substrate surface to realize the coating of conductive ink.…”

Section: Introductionmentioning

confidence: 99%

Femtosecond Laser Patterning Wettability‐Assisted PDMS for Fabrication of Flexible Silver Nanowires Electrodes

Liang

Sun

et al. 2021

Adv Materials Inter

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In this paper, a facile method is demonstrated to fabricate high resolution silver nanowires (AgNWs) electrode by combining femtosecond laser patterning and oxygen plasma treatment. The laser precision cutting selectively removes the thin polydimethylsiloxane (PDMS) mask to expose the target PDMS substrate. The subsequent oxygen plasma treatment makes the target substrate hydrophilic. The resulting wetting/dewetting pattern allows for selective trapping of AgNWs solutions into the hydrophilic regions. The geometry of AgNWs electrode can be readily tuned by varying the cutting path of laser patterning mask. Improving the cutting accuracy of mask by adjusting laser processing parameters, the minimum width of the AgNWs electrode can be reduced to 50 µm. The prepared AgNWs electrodes show good conductivity even after tensile strain less than 20% or 5000 bending cycles at 4 mm bending radius. Furthermore, using the patterned AgNWs electrodes, flexible electroluminescent displays are constructed, which exhibit bright and uniform emission with clear edges; even the track width is only 50 µm. This method provides a novel approach to pattern complex electrode for the application of flexible electronic products.

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“…With the development of printable and wearable electronics the need for elastic conductors arises, which exhibit conductivities clearly beyond the conductivity of carbon black‐filled systems and should usually also tolerate relatively large strains 9 . For this purpose, a broad spectrum of highly conductive carbon modifications 10 (carbon nanotubes, 11–13 graphene 14,15 ) and metallized or metallic particles, such as silver‐plated fibers, flakes 16 and spheres 17,18 as well as nanowires, 14,19,20 flakes, 16,21,22 micro‐ and nanopowders 22–24 of gold, silver or copper were investigated. Although there are numerous publications on promising highly conductive, highly stretchable, and also transparent composite materials, dynamic electromechanical investigations have rarely been performed to test the presence and extent of piezoresistive or other dynamic electro‐mechanical effects.…”

Section: Introductionmentioning

confidence: 99%

Dynamic electro‐mechanical analysis of highly conductive particle‐elastomer composites

Stier

Uhl

Löbmann

et al. 2020

J of Applied Polymer Sci

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The availability of stretchable conductive materials is a key requirement for the development of soft and wearable electronics. Although there are many promising materials, the characterization of these materials under realistic conditions is complex and a standardized and reliable procedure has not been etablished yet. We therefore introduce a comprehensive protocol for the practice‐oriented dynamic electro‐mechanical analysis of elastomer‐particle composites. In addition to strain dependence (0–100% strain) and fatigue strength (10,000 cycles), this protocol aims in particular to clarify the influence of strain rate (0–100% s−1) on conductivity. Samples with the commonly used filler representatives carbon black and silver flakes with 20 vol% each were prepared and investigated. Silicone elastomers of different stiffness were used as matrix in order to determine its influence. We found that while the conductivity of the carbon black composites of about 1 × 102 S m−1 proved to be fatigue resistant and largely independent of the strain rate, the silver flake composites lost their initially higher conductivity of 1 × 104 S m−1 at high strain rates and increasing numbers of cycles. In addition, the use of a softer silicone matrix improved the performance of both particle composites, which was also demonstrated on an exemplary wearable electronic device.

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Fully embedded CuNWs/PDMS conductor with high oxidation resistance and high conductivity for stretchable electronics

Cited by 34 publications

References 43 publications

Copper nanomaterials and assemblies for soft electronics

Copper nanomaterials and assemblies for soft electronics

Femtosecond Laser Patterning Wettability‐Assisted PDMS for Fabrication of Flexible Silver Nanowires Electrodes

Dynamic electro‐mechanical analysis of highly conductive particle‐elastomer composites

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