Chemical and thermal robust tri-layer rGO/Ag NWs/GO composite film for wearable heaters

Shang, Wei; Tian, Yanhong; Wang, Chenxi; Chen, Hang; Huang, Yongjun; Liao, Chao Yaug

doi:10.1016/j.compscitech.2019.02.022

Cited by 32 publications

(18 citation statements)

References 36 publications

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“…To emphasize the good optoelectronic performance of the AgNW@rGO networks, the sheet resistance values as a function of transmittance at 550 nm are listed for our AgNW@rGO networks and for other landmark TCs reported in the literature, as shown in Figure g. At the same transmittance, the sheet resistance of the AgNW@rGO networks is lower than that of graphene, Ag/CuNW–graphene/rGO/CNTs composite films, ,,,− Ag/CuNW networks, ,,, CuNW@graphene network, CuNW@rGO network, and ITO film and is comparable with the values of the thermally evaporated Au nanotrough–graphene composite film and thermally annealed Ag nanofiber network …”

Section: Resultsmentioning

confidence: 99%

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Reduced Graphene Oxide Conformally Wrapped Silver Nanowire Networks for Flexible Transparent Heating and Electromagnetic Interference Shielding

et al. 2020

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Metal nanowire networks (MNNs) are promising as transparent electrode materials for a diverse range of optoelectronic devices and also work as active materials for electrical heating and electromagnetic interference (EMI) shielding applications. However, the relatively low performance and poor durability of MNNs are limiting the practical application of the resulting devices. Here, we report a controllable approach to enhance the conductivity and the stability of MNNs with their transmittance remaining unchanged, in which reduced graphene oxide conformally wrapped silver nanowire networks (AgNW@rGO networks) are synthesized by selective electrodeposition of GO nanosheets on AgNWs followed by a pulsed laser irradiation treatment. Experimental characterizations and finite-difference time-domain simulations indicate that pulsed laser irradiation at a specific wavelength not only reduces the GO but also welds the AgNWs together through a surface plasmon resonance process. As a result, the AgNW@rGO networks exhibit low sheet resistance of 3.3 Ω/□, average transmittance of 91.1%, and good flexibility. Wrapping with rGO improves the maximum electrical heating temperature of the AgNW network transparent heaters due to the effective suppression of the oxidation and the migration of surface silver atoms. In addition, excellent EMI shielding effectiveness of up to 35.5 dB in the 8.2−12.4 GHz frequency range is obtained as a consequence of the combined effects of dual reflection, conduction loss, and multiple dielectric polarization relaxation processes.

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Section: Resultsmentioning

confidence: 99%

“…(g) Plot of sheet resistance versus transmittance at 550 nm for the AgNW@rGO networks. The performances of previously reported TCs are shown for comparison. − ,,,− ,− …”

Section: Resultsmentioning

confidence: 99%

Reduced Graphene Oxide Conformally Wrapped Silver Nanowire Networks for Flexible Transparent Heating and Electromagnetic Interference Shielding

et al. 2020

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“…The heater with a sheet resistance of 3.7 Ω/sq and transmittance of 82.5% had steady-state temperature of 145 °C. As compared with other flexible transparent heaters in the literature studies, the heater based on nanosoldered Ag NWs had both high heating rate (4.8 °C/s) and power density (0.8 W/cm 2 ). ,,− Thus, the heater could reach a high steady-state temperature of 145 °C at a low input voltage of 6 V with a fast response time of 30 s. For the heating rate, it is proportional to the accumulated heat in film heater, while the accumulated heat is determined by the difference value between the generated heat and dissipated heat. For best practice, it is preferred to have high heating rate and low power density, in other words, smaller dissipated heat is better.…”

Section: Resultsmentioning

confidence: 99%

Self-Limited Nanosoldering of Silver Nanowires for High-Performance Flexible Transparent Heaters

Huang

Tian

Chen

et al. 2019

ACS Appl. Mater. Interfaces

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Silver nanowires (Ag NWs) are key materials to fabricate next-generation flexible transparent electrodes (FTEs). Currently, the applications of Ag NWs are impeded by the large wire−wire contact resistance. Herein, a selflimited nanosoldering method is proposed to reduce the contact resistance by epitaxially depositing silver nanosolders at the Ag NW junctions, which have a negligible effect on the optical transparency, while decreasing the sheet resistance of the Ag NW film from 18.6 to 7.7 Ω/sq at a transmittance of 90%. In addition, the deposited nanosolders at the junctions remarkably improve the electrical and mechanical stabilities of the Ag NW electrodes. Notably, this simple nanosoldering process can be rapidly conducted under room temperature and ambient conditions and is free of any technical support or specific equipment. This technique is easily applied to the nanosoldering of 210 × 297 mm FTEs. Based on these FTEs, a high-performance flexible transparent heater with a sheet resistance 3.7 Ω/sq at a transmittance of 82.5% is constructed. Because of the high heating rate (4.8 °C/s), the heater can produce uniform heating (145 °C) at a short response time (30 s) and low input voltage (6 V).

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“…Graphene endows the soft electronics with outstanding reliability and long-term stability as well as high conductivity [12,25,26,28,152]. Especially, graphene oxide or reduced graphene oxide can provide an effective monolayer for protecting the inner metal atoms from corrosion [153]. Copper nanomaterials were composited with a layer of graphene to effectively suppress the oxidation process.…”

Section: Monolayer Coatingsmentioning

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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Chemical and thermal robust tri-layer rGO/Ag NWs/GO composite film for wearable heaters

Cited by 32 publications

References 36 publications

Reduced Graphene Oxide Conformally Wrapped Silver Nanowire Networks for Flexible Transparent Heating and Electromagnetic Interference Shielding

Reduced Graphene Oxide Conformally Wrapped Silver Nanowire Networks for Flexible Transparent Heating and Electromagnetic Interference Shielding

Self-Limited Nanosoldering of Silver Nanowires for High-Performance Flexible Transparent Heaters

Copper nanomaterials and assemblies for soft electronics

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