Strongly Adhesive Silver Nanowire Ink Makes Delamination-Free Transparent Conductive Films Possible

Abstract

Transparent conductive film (TCF) fabricated with silver nanowires (AgNWs) is one of the most promising candidates to replace the state-of-the-art indium tin oxide films as electrodes in next generation flexible displays. The adhesion of AgNWs on a substrate is one of the key limiting factors that influence the yield and quality of downstream products. Inserting an adhesive interlayer between the substrate and AgNWs complicates the fabrication process and may worsen the uniformity of the films. Herein, we report a self-adhesive coating ink that can realize tight adhesion of AgNWs on the substrate. The ink consists of AgNWs and sodium alginate. TCFs coated with the ink exhibit a strong adhesion on the substrate, and no delamination is observed after peeling with 3 M tape, long-time immersion in a solvent, ultrasonicating in a water bath, or multiple bending to a small radius. The optoelectronic performance of TCFs after the aforementioned treatments remains constant and is superior to those reported in the literature. The self-adhesive coating ink makes delamination-free AgNW TCFs possible.

Low‐Resistant Electrical and Robust Mechanical Contacts of Self‐Attachable Flexible Transparent Electrodes with Patternable Circuits

“…In general, Ag nanowires coated on flexible substrates are delaminated from the substrates owing to the low adhesion between the nanowires and substrates. [ 12a,25 ] In our case, the Ag nanowires were partially embedded in the e‐PUA after the replica molding process, as depicted by the SEM and atomic force microscopy (AFM) images (Figure 2b‐ii,iii). Therefore, the Ag nanowires were not delaminated from the surface of the AF‐TCE even when the electrode was highly bent while the partially exposed side of the nanowires could function as conductive pathways.…”

Ink Art Three-Dimensional Big Data Three-Dimensional Display Index Prediction Model

“…After the model is outlined, the interior of the model is colored according to the lighting model to depict the effects of light, shade, and shadow [6]. Wang et al proposed a dynamic balance model based on the principles of physics and chemistry, which explained the diffusion characteristics of ink on rice paper [7]. ey pointed out that ink diffusion is mainly caused by water molecules and between water molecules and carbon molecules.…”

Biomass-Derived, Highly Conductive Aqueous Inks for Superior Electromagnetic Interference Shielding, Joule Heating, and Strain Sensing

“…14 Wang et al prepared delamination-free conductive films using silver nanowire inks with sodium alginate as the binder. 15 However, the use of non-conductive polymer binders can significantly decrease the electrical conductivity of these inks, which may limit their material performance as high conductivity is a key requirement for their efficient use in different applications, such as EMI shielding and Joule heating. 16−18 waves can be reflected or absorbed by the conductive materials, the EMI shielding effectiveness is positively related to the conductivity of shielding materials.…”

“…Introducing polymer binders to conductive inks is effective to improve the adhesion between inks and substrates. , For example, Secor et al prepared graphene inks using nitrocellulose as the polymer binder to improve the mechanical, adhesion, and environmental stability of the conductive inks . Wang et al prepared delamination-free conductive films using silver nanowire inks with sodium alginate as the binder . However, the use of non-conductive polymer binders can significantly decrease the electrical conductivity of these inks, which may limit their material performance as high conductivity is a key requirement for their efficient use in different applications, such as EMI shielding and Joule heating. − Specifically, while the electromagnetic (EM) waves can be reflected or absorbed by the conductive materials, the EMI shielding effectiveness is positively related to the conductivity of shielding materials. − Similarly, high conductivity enables the effective heating of these conductive materials to reach a desired temperature driven by a low voltage, which is beneficial for the application of portable heaters. , Moreover, a large amount of toxic organic solvents is typically required to dissolve or disperse the polymer binders in conductive inks, which significantly increases the production costs and can lead to potential environmental and safety concerns .…”