Hydrogel‐Based Flexible Electronics

Hu, Lixuan; Chee, Pei Lin; Sugiarto, Sigit; Yu, Yong; Shi, Chuanqian; Ren, Yan; Yao, Zhuoqi; Shi, Xuewen; Zhi, Jiacai; Dan, Kai; Yu, Hai‐Dong; Huang, Wei

doi:10.1002/adma.202205326

Cited by 166 publications

(120 citation statements)

References 214 publications

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“…Because of their similar mechanical properties to tissues, hydrogels have been widely used as biomaterials ( Hu et al, 2022 ; Jiang and Song, 2022 ). For example, by incorporating starch granules into hydrogel, Fang et al fabricated tissue-like materials ( Fang et al, 2020 ).…”

Section: Need For Advanced Tissue-like Materialsmentioning

confidence: 99%

Recent advances in electronic skins: material progress and applications

Cao

Cai

2022

Front. Bioeng. Biotechnol.

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Electronic skins are currently in huge demand for health monitoring platforms and personalized medicine applications. To ensure safe monitoring for long-term periods, high-performance electronic skins that are softly interfaced with biological tissues are required. Stretchability, self-healing behavior, and biocompatibility of the materials will ensure the future application of electronic skins in biomedical engineering. This mini-review highlights recent advances in mechanically active materials and structural designs for electronic skins, which have been used successfully in these contexts. Firstly, the structural and biomechanical characteristics of biological skins are described and compared with those of artificial electronic skins. Thereafter, a wide variety of processing techniques for stretchable materials are reviewed, including geometric engineering and acquiring intrinsic stretchability. Then, different types of self-healing materials and their applications in electronic skins are critically assessed and compared. Finally, the mini-review is concluded with a discussion on remaining challenges and future opportunities for materials and biomedical research.

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Section: Need For Advanced Tissue-like Materialsmentioning

confidence: 99%

Recent advances in electronic skins: material progress and applications

Cao

Cai

2022

Front. Bioeng. Biotechnol.

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“…Research in the developing topic of flexible electronics draws from a wide variety of fields, including but not limited to physics, chemistry, materials science, electrical engineering, and biology. However, the widespread application of flexible electronics is still limited because of a number of restrictions, the most significant of which are a high Young’s modulus, poor biocompatibility, and low response [ 30 ]. Numerous artificial skin-like electronic materials have been investigated for use in soft robots, artificial intelligence, biomedical prosthesis, and wearable electronics devices [ 31 ].…”

Section: Introductionmentioning

confidence: 99%

Recent Progress on Hydrogel-Based Piezoelectric Devices for Biomedical Applications

Lin

et al. 2023

Micromachines

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Flexible electronics have great potential in the application of wearable and implantable devices. Through suitable chemical alteration, hydrogels, which are three-dimensional polymeric networks, demonstrate amazing stretchability and flexibility. Hydrogel-based electronics have been widely used in wearable sensing devices because of their biomimetic structure, biocompatibility, and stimuli-responsive electrical properties. Recently, hydrogel-based piezoelectric devices have attracted intensive attention because of the combination of their unique piezoelectric performance and conductive hydrogel configuration. This mini review is to give a summary of this exciting topic with a new insight into the design and strategy of hydrogel-based piezoelectric devices. We first briefly review the representative synthesis methods and strategies of hydrogels. Subsequently, this review provides several promising biomedical applications, such as bio-signal sensing, energy harvesting, wound healing, and ultrasonic stimulation. In the end, we also provide a personal perspective on the future strategies and address the remaining challenges on hydrogel-based piezoelectric electronics.

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“…Compared with the PCL and PDMS, hydrogels are composed of a large amount of water and have low modulus and large stretchability. They have shown great potential in the biomedical device, − flexible electronics, − soft machines, − and so forth. For instance, the hydraulic hydrogel robot shows excellent optical and sonic camouflage ability in water .…”

Section: Introductionmentioning

confidence: 99%

Multi-material 3D Printing of Mechanochromic Double Network Hydrogels for On-Demand Patterning

Wang

Luo

et al. 2023

ACS Appl. Mater. Interfaces

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Cephalopods can change their color and patterns by activating the skin chromatophores for camouflage. However, in the man-made soft material systems, it is greatly challenging to fabricate the color-change structure in the desired patterns and shapes. Herein, we employ a multi-material microgel direct ink writing (DIW) printing method to make mechanochromic double network hydrogels in arbitrary shapes. We prepare the microparticles by grinding the freeze-dried polyelectrolyte hydrogel and immobilize the microparticles in the precursor solution to produce the printing ink. The polyelectrolyte microgels contain mechanophores as the cross-linkers. We adjust the rheological and printing properties of the microgel ink by tailoring the grinding time of freeze-dried hydrogels and microgel concentration. The multi-material DIW 3D printing technique is utilized to fabricate various 3D hydrogel structures which could change into a colorful pattern in response to applied force. The microgel printing strategy shows great potential in the fabrication of the mechanochromic device with arbitrary patterns and shapes.

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Hydrogel‐Based Flexible Electronics

Cited by 166 publications

References 214 publications

Recent advances in electronic skins: material progress and applications

Recent advances in electronic skins: material progress and applications

Recent Progress on Hydrogel-Based Piezoelectric Devices for Biomedical Applications

Multi-material 3D Printing of Mechanochromic Double Network Hydrogels for On-Demand Patterning

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