Towards conductive hydrogels in e-skins: a review on rational design and recent developments

Li, Chujia

doi:10.1039/d1ra04573c

Cited by 21 publications

(10 citation statements)

References 136 publications

(404 reference statements)

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“…An electrically conductive silver–polyacrylamide–alginate hydrogel composite for soft electronics has been reported elsewhere [ 118 ]. However, there are still significant obstacles to overcome before conductive hydrogels can be concurrently combined to obtain exceptional mechanical strength and conductivity without losing their versatility [ 119 ]. Hydrogel composites help to improve compliance and recoverability from deformation.…”

Section: Hydrogels For El Device Fabricationmentioning

confidence: 99%

Recent Progress in Self-Healable Hydrogel-Based Electroluminescent Devices: A Comprehensive Review

Tadesse

Lübben

2023

Gels

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Flexible electronics have gained significant research attention in recent years due to their potential applications as smart and functional materials. Typically, electroluminescence devices produced by hydrogel-based materials are among the most notable flexible electronics. With their excellent flexibility and their remarkable electrical, adaptable mechanical and self-healing properties, functional hydrogels offer a wealth of insights and opportunities for the fabrication of electroluminescent devices that can be easily integrated into wearable electronics for various applications. Various strategies have been developed and adapted to obtain functional hydrogels, and at the same time, high-performance electroluminescent devices have been fabricated based on these functional hydrogels. This review provides a comprehensive overview of various functional hydrogels that have been used for the development of electroluminescent devices. It also highlights some challenges and future research prospects for hydrogel-based electroluminescent devices.

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Section: Hydrogels For El Device Fabricationmentioning

confidence: 99%

Recent Progress in Self-Healable Hydrogel-Based Electroluminescent Devices: A Comprehensive Review

Tadesse

Lübben

2023

Gels

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“…Thus, 1D conductive hydrogel fibers (CHFs) have become critical candidates as flexible function materials of flexible electronics on account of their unique features including anisotropy, large length-to-diameter ratio, good weavability and knittability, and excellent mechanical flexibility (Figure 1). [37][38][39][40][41][42][43] The 1D macrostructures and 3D network microstructures of CHFs not only afford continuous and effective transport channels for electrons and ions, but also contract the diffusion distance of ions as well as accelerate the electrons and ions transport rate. It is noted that CHFs are preferable for flexible electronics in consequence of their high conductivity and electrochemical activity, involving the flexible energy harvesting and storage devices.…”

Section: Introductionmentioning

confidence: 99%

Recent Progress of Conductive Hydrogel Fibers for Flexible Electronics: Fabrications, Applications, and Perspectives

Liu

Wei

et al. 2023

Adv Funct Materials

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lightweight, portable, foldable, stretchable, and biocompatible are triggering the intense interests of researchers from multidisciplinary fields like biology, material science, and chemistry. [9][10][11] Nowadays, great attempts have been devoted to developing advanced flexible electronics by integrating various inorganic or organic traditional conductive functional materials with flexible electrochemically non-active elastic substrates. [12][13][14][15][16][17] Generally, traditional conductive functional materials encounter the shortcomings such as high price, inherent rigidity, weak biocompatibility, poor mechanical, and inferior interface bonding properties, which are employed to evaluate the performance of the flexible electronics materials. Therefore, pursuing these materials with practical applications is an emergent issue in the research field.Nevertheless, in numerous conductive functional materials, hydrogels with 3D network structures have been largely selected as the excellent candidates due to their high water content, excellent biocompatibility and biodegradability properties, high elasticity, and outstanding stimulus responsiveness. [18][19][20][21][22][23] Conductive hydrogels are generally constructed via integrating various conductive substances into the hydrogel matrix, which are comprised of carbon materials (carbon nanotubes (CNTs), graphite), metal oxides, metal sulfides, metal nanoparticles and conductive polymers (polyaniline (PANI), polypyrrole (PPy), poly (3,4-ethylenedioxythiophene) (PEDOT:PSS)). [24][25][26][27][28][29][30] For example, Han et al. fabricated a CNTs-based conductive hydrogel for strain sensors by in situ polymerization of acrylic acid and acrylamide in water/glycerol solutions in the presence of polydopamine-decorated CNTs. [28] Devaki et al. reported a 3D Ag nanoparticles-polyacrylic acid conductive hydrogel via combining in situ polymerization of acrylic acid and reduction of Ag + . [29] Duan et al. constructed a robust and force-sensitive conductive hydrogel employing synthesizing polyacrylamide and PANI in closely packed swollen chitosan microspheres. [30] According to the different configurations of hydrogels, conductive hydrogels are allowed to be processed into 3D bulk gels, 2D gel films, 1D gel fibers, and 0D microgels. [31][32][33][34][35][36] The mechanical flexibility of 1D fibrous configuration is superior to that of 3D bulk or 2D film configuration due to its well-oriented polymer chains, light weight, and low dimensions for flexible electronics. Moreover, ultra-flexible fibrous materials can be easily woven into diverse soft and breathable fabrics, which

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“…[2][3][4][5] Indeed, designing conductive hydrogels, which represent the dominant soft material in Materials Engineering applied to biomedicine, with a combination of advanced features, makes them ideal platforms to promote the regeneration of those tissues sensitive to electrical signals, such as cardiac, skin and nerve tissue. 6,7 Not only that but also the integration of multifunctionality, as well as prolonged performance, results in promising opportunities, not yet achieved, for long-term clinical applications in terms of tissue restoration.…”

Section: Introductionmentioning

confidence: 99%

Multifunctional conductive hyaluronic acid hydrogels for wound care and skin regeneration

2023

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Towards conductive hydrogels in e-skins: a review on rational design and recent developments

Abstract: This review constructed a framework of methodologies to summarize the recent progress of high-performance conductive hydrogels for flexible electronics and further provide novel insights about rational design of the advanced hydrogels.

Cited by 21 publications

References 136 publications

Recent Progress in Self-Healable Hydrogel-Based Electroluminescent Devices: A Comprehensive Review

Recent Progress in Self-Healable Hydrogel-Based Electroluminescent Devices: A Comprehensive Review

Recent Progress of Conductive Hydrogel Fibers for Flexible Electronics: Fabrications, Applications, and Perspectives

Multifunctional conductive hyaluronic acid hydrogels for wound care and skin regeneration

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