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

Chem. Commun.

2023

DOI: 10.1039/d3cc04198k

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Liquid metal–hydrogel composites for flexible electronics

Jianhui Chen,

Gongwei Tian,

Cuiyuan Liang

et al.

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...

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Cited by 8 publications

References 208 publications

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Nucleobase‐Driven Wearable Ionogel Electronics for Long‐Term Human Motion Detection and Electrophysiological Signal Monitoring

Yan,

Zhao,

Lin

et al. 2024

Adv Funct Materials

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Ionogels are considered as ideal candidates for constructing flexible electronics due to their superior electrical conductivity, flexibility, high thermal and electrochemical stability. However, it remains a great challenge to simultaneously achieve high sensitivity, repeated adhesion, good self‐healing, and biocompatibility through a straightforward strategy. Herein, inspired by nucleobase‐tackified strategy, a multifunctional adhesive ionogel is developed through one‐step radical polymerization of acrylated adenine/uracil (Aa/Ua) and acrylic acid (AA) monomers in sodium caseinate (SC) stabilized liquid metal dispersions. As a soft conductive filler, the incorporating of liquid metal not only improves the electrical conductivity, but also enhances the mechanical strength, satisfying the stretchable sensing application. The large amount of noncovalent interactions (hydrogen bonding, metal coordination, and ion‐dipole interactions) within the networks enable the ionogels to possess excellent stretchability, skin‐like softness, good self‐healing, and strong adhesion. Based on these desirable characteristics, the ionogel is suitable for wearable strain sensors to precisely detect diverse human movements under extreme environments. Moreover, the seamless adhesion with human skin allows the ionogel to function as bioelectrode patch for long‐term and high‐quality electrophysiological signal acquisition. This research provides a promising strategy for designing ionogels with tailored functionalities for wearable electronics that satisfy diverse application requirements.

show abstract

Nucleobase‐Driven Wearable Ionogel Electronics for Long‐Term Human Motion Detection and Electrophysiological Signal Monitoring

Yan,

Zhao,

Lin

et al. 2024

Adv Funct Materials

View full text Add to dashboard Cite

show abstract

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

Cysewska,

Pawłowska

2024

Electrochimica Acta

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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 8 publications

References 208 publications

Nucleobase‐Driven Wearable Ionogel Electronics for Long‐Term Human Motion Detection and Electrophysiological Signal Monitoring

Nucleobase‐Driven Wearable Ionogel Electronics for Long‐Term Human Motion Detection and Electrophysiological Signal Monitoring

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

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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