Liquid metal–hydrogel composites for flexible electronics

Chen, Jianhui; Tian, Gongwei; Liang, Cuiyuan; Yang, Dan; Zhao, Qinyi; Liu, Yan; Qi, Dianpeng

doi:10.1039/d3cc04198k

Cited by 5 publications

References 208 publications

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Lignin‐Stabilized Tough, Sticky, and Recyclable Liquid Metal/Protein Organogels for Multifunctional Epidermal Smart Materials

Wu,

Qi,

Zhang

et al. 2024

Small

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Biomass‐encapsulated liquid metals (LMs) composite gels have aroused tremendous attention as epidermal smart materials due to their biocompatibility and sustainability. However, they can still not simultaneously possess toughness, adhesion, and recoverability. In this work, the tough, sticky, and recyclable protein‐encapsulated LMs organogels (GLMx) are fabricated through the micro‐interfacial stabilization of LMs by lignin and the following preparation of food‐making inspired gels. With the help of lignin modification, the LMs micro‐drops demonstrated uniform dispersion in the protein matrix, as well as dense non‐covalent interactions (e.g., H─bond and hydrophobic interaction) with amino acid residues in peptide chains, which endowed the GLMx with high conductivity (≈5.4 S m−1), toughness (≈738.2 kJ m−3), self‐adhesiveness (a maximal lap‐shear strength of ≈58.3 kPa), and recoverability. By tightly adhering onto human skin, the GLMx can act as epidermal sensors to detect drastic (e.g., joint bending) and subtle body movements (e.g., swallowing) and even recognize handwriting and speaking in real‐time. Moreover, the organogels can also harvest solar energy and convert it into heat and electricity, which is promising in self‐powered intelligent devices. Thus, this work paves a facile way to prepare protein/LMs composite organogels that are suitable for multiple applications like healthcare, human‐robot interactions, and solar energy conversion.

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Lignin‐Stabilized Tough, Sticky, and Recyclable Liquid Metal/Protein Organogels for Multifunctional Epidermal Smart Materials

Wu,

Qi,

Zhang

et al. 2024

Small

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Semi-liquid metal-based highly permeable and adhesive electronic skin inspired by spider web

Guo,

Li,

Zhou

et al. 2024

Science Bulletin

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A simple route of providing a soft interface for PEDOT:PSS film metallic electrodes without loss of their electrical interface parameters

Cysewska,

Pawłowska

2024

Preprint

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The work presents the procedure of developing a soft interface at PEDOT:PSS film without changing its electrical interface parameters. In the first step, PEDOT:PSS is electrodeposited on the commercial platinum electrode under the state-of-the-art conditions desirable for different electrochemical electrodes. Secondly, a pure hydrogel layer is deposited on the top of the electrodeposited PEDOT:PSS film under conditions, that provide desirable mechanical properties (Young’s modulus ~ 10–20 kPa) and high permeability to ions from the solution. As a result, a PEDOT:PSS electrode with a soft interface desirable for different electrode applications is fabricated. The electrode exhibits electrical parameters at the same level as the state-of-the-art PEDOT:PSS film applied already for electrode applications. Moreover, the hydrogel layer supports additionally the electrochemical stability of the polymeric film by inhibiting its oxidative degradation. The work shows that the specific choice of the hydrogel type and fabrication conditions allows to synthesis of the hydrogel interface on a stiff polymeric film, which does not block the ionic and electrical transfer. Moreover, the fabricated PEDOT:PSS electrode with hydrogel interface reveals interfacial impedance and potential window comparable or even better to the already published studies on PEDOT:PSS hydrogels.

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Liquid metal–hydrogel composites for flexible electronics

Abstract: As an emerging functional material, liquid metal-hydrogel composites exhibit excellent biosafety, high electrical conductivity, tunable mechanical property and good adhesion, thus providing a unique platform for a wide range of...

Cited by 5 publications

References 208 publications

Lignin‐Stabilized Tough, Sticky, and Recyclable Liquid Metal/Protein Organogels for Multifunctional Epidermal Smart Materials

Lignin‐Stabilized Tough, Sticky, and Recyclable Liquid Metal/Protein Organogels for Multifunctional Epidermal Smart Materials

Semi-liquid metal-based highly permeable and adhesive electronic skin inspired by spider web

A simple route of providing a soft interface for PEDOT:PSS film metallic electrodes without loss of their electrical interface parameters

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