Healable, Transparent, Room‐Temperature Electronic Sensors Based on Carbon Nanotube Network‐Coated Polyelectrolyte Multilayers

Abstract

Transparent and conductive film based electronics have attracted substantial research interest in various wearable and integrated display devices in recent years. The breakdown of transparent electronics prompts the development of transparent electronics integrated with healability. A healable transparent chemical gas sensor device is assembled from layer-by-layer-assembled transparent healable polyelectrolyte multilayer films by developing effective methods to cast transparent carbon nanotube (CNT) networks on healable substrates. The healable CNT network-containing film with transparency and superior network structures on self-healing substrate is obtained by the lateral movement of the underlying self-healing layer to bring the separated areas of the CNT layer back into contact. The as-prepared healable transparent film is assembled into healable transparent chemical gas sensor device for flexible, healable gas sensing at room temperature, due to the 1D confined network structure, relatively high carrier mobility, and large surface-to-volume ratio. The healable transparent chemical gas sensor demonstrates excellent sensing performance, robust healability, reliable flexibility, and good transparency, providing promising opportunities for developing flexible, healable transparent optoelectronic devices with the reduced raw material consumption, decreased maintenance costs, improved lifetime, and robust functional reliability.

Flexible and Robust Electro‐Optically Responsive Films Based on Novel Silica/Oligoaniline/Carbon Dots Composite

“…[1][2][3][4] Organic semiconductors, especially those based on conjugated polymers, are promising towards these ends and have been explored extensively. [1][2][3][4] Organic semiconductors, especially those based on conjugated polymers, are promising towards these ends and have been explored extensively.…”

Self‐Healing Materials for Next‐Generation Energy Harvesting and Storage Devices

“…Chemical structure of various polymers for the self-healing energy harvesting and storage devices. a) PVA: poly(vinyl alcohol) [99,127,128] , b) PAA: polyacrylic acid [71,80,97,98] , c) PDMS: polydimethylsiloxane [42,77,83] , d) PDMAA: poly(N,N-dimethylacrylamide) [51,52] , e) PMCMA-co-PCMA: poly[2-(ethylcarbamoyloxy)ethyl methacrylate-co-2-(ethylcarbamoyloxy)ethyl acrylate [56] ], f) PCL: polycaprolactone [69,75] , g) bPEI: branched polyethylenimine [62,71,80] , h) PU: polyurethane. [43,81,[91][92][93] www.advancedsciencenews.com Adv.…”

“…Similarly, Pei's group presented a semitransparent composite conductor comprising a conductive layer of AgNWs percolation network embedded in the surface layer of a Diels-Alder (DA) based healable polymer film. [72] Based on the similar concept of the combination of highly conductive AgNWs layer with healable polymer matrix, other types of healable polymer matrix such as polyurethane crosslinked Diels-Alder adducts, [42,43] thermoplastic polycaprolactone, [75] photochromic healable materials, [76] dynamic-covalent boroxine bonds based polymer [77] and other conductive networks such as copper nanowires (CuNWs), [81] carbon nanotubes [78,80] have also been developed to fabricate self-healable conductors.…”

Carbon nanotube based transparent conductive films: progress, challenges, and perspectives

“…Since the electrical properties of CNT networks can be very sensitive to temperature, humidity, light, gas, pressure and strain, they can transfer the variation of the environment into electronic signals. [129–143] In particular, they can describe abstract experiences such as human action, feeling and emotion with digital signals. In 2015, Roh et al .…”