Liquid metal-integrated ultra-elastic conductive microfibers from microfluidics for wearable electronics

Yu, Yunru; Guo, Jiahui; Ma, Biao; Zhang, Dagan; Zhao, Yuanjin

doi:10.1016/j.scib.2020.06.002

Cited by 98 publications

(55 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is presumed that too much fluoroelastomer in the core may lead to the incomplete percolation of LM particles, and too less fluoroelastomer cannot sufficiently reshape the LM phase for enhanced conductivity with stretch (will be discussed in the latter part). We compared the electrical performance of the present LM sheath-core microfibers with the currently reported strain-insensitive and LM-based stretchable fiber conductors ( 7 , 8 , 20 – 22 , 28 , 29 , 46 – 48 ) on the basis of maximum strain, initial conductivity, and Δ R / R 0 at 200% strain. As shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

Conductance-stable liquid metal sheath-core microfibers for stretchy smart fabrics and self-powered sensing

et al. 2021

View full text Add to dashboard Cite

Highly conductive and stretchy fibers are crucial components for smart fabrics and wearable electronics. However, most of the existing fiber conductors are strain sensitive with deteriorated conductance upon stretching, and thus, a compromised strategy via introducing merely geometric distortion of conductive path is often used for stable conductance. Here, we report a coaxial wet-spinning process for continuously fabricating intrinsically stretchable, highly conductive yet conductance-stable, liquid metal sheath-core microfibers. The microfiber can be stretched up to 1170%, and upon fully activating the conductive path, a very high conductivity of 4.35 × 104 S/m and resistance change of only 4% at 200% strain are realized, arising from both stretch-induced channel opening and stretching out of tortuous serpentine conductive path of the percolating liquid metal network. Moreover, the microfibers can be easily woven into an everyday glove or fabric, acting as excellent joule heaters, electrothermochromic displays, and self-powered wearable sensors to monitor human activities.

show abstract

Section: Resultsmentioning

confidence: 99%

Conductance-stable liquid metal sheath-core microfibers for stretchy smart fabrics and self-powered sensing

et al. 2021

View full text Add to dashboard Cite

show abstract

“…[ 131,132 ] Due to the fluidity of liquid metals, they are usually confined in microfluidic channels for flexible sensors as active sensing materials or interconnections. [ 133–140 ] For instance, a diaphragm pressure sensor was developed by embedding Galinstan in microchannels (height and width: 70 µm), leading to the formation of a Wheatstone bridge (Figure 2k). [ 141 ] Applying the pressure to the tangential sensing grids enables the resistance ( R t ) increase of the tangential bridge due to tension around its center, whereas the resistance ( R r ) decreases in a radial bridge, contributing to the sensitivity of 0.0835 kPa −1 with sub‐100 Pa detection limits.…”

Section: Functional Nanomaterials and Structures For Versatile Flexible Sensorsmentioning

confidence: 99%

Flexible Hybrid Sensor Systems with Feedback Functions

Takei

2020

Adv Funct Materials

103

View full text Add to dashboard Cite

Skin‐like wearable sensors are regarded as key technologies toward home‐based healthcare, human–machine interfaces, robotics, prostheses, and enhanced augmented/virtual reality (AR/VR). Inspired by human somatosensory functions, artificial sensory feedback systems play vital roles in shaping interactions with complex environments and timely decision‐making. This study presents an overview of recent advances in feedback‐driven, closed‐loop skin‐inspired flexible sensor systems that make use of emerging functional nanomaterials and elaborate structures. Drawing on feedback solutions, four categories of sensor systems are highlighted, which include prosthesis‐ and AR/VR‐based human–machine interfaces, smartphone‐based approaches for point‐of‐care detection, and smart wearable displays for direct signal visualizations. Furthermore, the progress of machine learning on the reliable recognition of massive quantities of signals generated by flexible sensor networks is briefly discussed. The state‐of‐the‐art hybrid sensor techniques, along with other emerging strategies, will enable total sensory feedback loop systems to be developed for next‐generation electronic skins.

show abstract

“…Another kind of fillers is carbonaceous filler like carbon black, carbon particle, carbon fiber, carbon nanotubes, carbon aerogel, graphite, graphene, graphene oxide, and reduced graphene oxide 123‐125 . Liquid electrolyte 126,127 and liquid metal 49,128‐132 are the two main representatives of liquid electrodes, which are flexible and stretchable conductive materials. But they are mostly toxicity, heavy, ease of leakage, and expensive.…”

Section: Wearable Ttegsmentioning

confidence: 99%

Recent advances in wearable textile‐based triboelectric generator systems for energy harvesting from human motion

Bao

Xiong

et al. 2020

EcoMat

View full text Add to dashboard Cite

Large-area, flexible, and lightweight textile-based triboelectric generator (TTEG) technologies are promising power supplier by harvesting energy from human motions, wind, and water current. Numerous TTEG systems have been demonstrated. However, the challenges in their applications include the low electric output power, failure under wearing conditions, and adverse effects on the wearable performance like comfort and durability. What is the influence of system integration on the output performance of the TTEGs? What kinds of textile-structures have the most promising performance? How to make an effective TTEG system? In an attempt to answer these important questions, a critical review is presented on the recent advances of wearable TTEG systems in terms of textile structures, selection of materials, working modes, mechanisms of triboelectrification and charge transfer, energy storage, and their integrations. Furthermore, the major approaches or directions for improving the total conversion efficiency and performance of wearable TTEG systems are systematically summarized.

show abstract

Liquid metal-integrated ultra-elastic conductive microfibers from microfluidics for wearable electronics

Cited by 98 publications

References 43 publications

Conductance-stable liquid metal sheath-core microfibers for stretchy smart fabrics and self-powered sensing

Conductance-stable liquid metal sheath-core microfibers for stretchy smart fabrics and self-powered sensing

Flexible Hybrid Sensor Systems with Feedback Functions

Recent advances in wearable textile‐based triboelectric generator systems for energy harvesting from human motion

Contact Info

Product

Resources

About