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

Abstract

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.

Transparent Electromagnetic Shielding Film Utilizing Imprinting-Based Micro Patterning Technology

“…When a conductive polymer is used, transparency and flexibility are achievable, but durability is problematic. Recently, various studies have been carried out to form a conductive pattern using silver and copper nanowires [18][19][20]; however, the conductivity and shielding properties tend to be limited. To solve this problem, a hybrid system that utilizes two r more technologies has been proposed.…”

Rational Component and Structure Design of Noble‐Metal Composites for Optical and Catalytic Applications

“…Nevertheless, there remains much to learn about these systems using, for example, in situ characterization, precise control, mass production, mechanism exploration, and functional application of noble‐metal composites. On the other hand, the versatile design of noble‐metal composites allows them to be used in other interesting emerging fields, covering electromagnetic interference (EMI) shielding, [ 285–287 ] printing, [ 288–291 ] biotechnology, [ 292–294 ] sensors, [ 295–298 ] and solar energy. [ 299–301 ] Based on the unique features of noble‐metal composites, combined with their finely tuned component and structure design, noble‐metal composites can be produced at low cost and in batches, which further promotes their application in the fields of optics, catalysis, medicine, and electricity.…”

Effect of Textile-Substrate Pore Size on Electromagnetic Interference Shielding Performance of Conductive Nanocomposite Coated Fabrics

“…Radio-frequency electromagnetic interference (EMI) from computers, mobile phones, the Internet and electronic organizers, often causes undesirable damages to electronic devices and human beings. With the advent of the 5G era, materials capable of shielding against EMI are recognized increasingly due to their applications in reducing and eliminating temporary electronic interference, system failures and data loss (Lian et al 2020;Liu et al 2021;Saffer and Thurston 1995;Wang et al 2020;Yang et al 2020;Zhao et al 2020). Textile-substrate EMI shielding materials have been used in civil, commercial, military, and aerospace applications, attributing to the unique characteristics of fabrics such as exibility, air permeability, wearability (Lee et al 2016;Li et al 2018;Wang et al 2019;Zhu et al 2021).…”