Versatile fabrication of liquid metal nano-ink based flexible electronic devices

Zhang, Mingyang; Li, Guoqiang; Huang, Lei; Ran, Puhang; Huang, Jianping; Yu, Mei; Yuqian, Hengyuan; Guo, Jinhong; Liu, Zhiyuan; Ma, Xing

doi:10.1016/j.apmt.2020.100903

Cited by 61 publications

(45 citation statements)

References 50 publications

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Section: Applicationsmentioning

confidence: 99%

“…developed liquid metal‐based tissue interfaces for stimulating and monitoring of myoelectric signals of the mouse (Figure 9f). [ 148 ] EGaIn capsules dispersed in ethanol were used as an printable ink, and laser sintering was applied to have electrical conductivity. Pulse signals were applied to the nerves through liquid metal interfaces, to induce reflex signals (Figure 9g).…”

Section: Applicationsmentioning

confidence: 99%

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Liquid Metal‐Based Soft Electronics for Wearable Healthcare

Park

Lee

Jang

et al. 2021

Adv Healthcare Materials

156

100

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Wearable healthcare devices have garnered substantial interest for the realization of personal health management by monitoring the physiological parameters of individuals. Attaining the integrity between the devices and the biological interfaces is one of the greatest challenges to achieving high‐quality body information in dynamic conditions. Liquid metals, which exist in the liquid phase at room temperatures, are advanced intensively as conductors for deformable devices because of their excellent stretchability and self‐healing ability. The unique surface chemistry of liquid metals allows the development of various sensors and devices in wearable form. Also, the biocompatibility of liquid metals, which is verified through numerous biomedical applications, holds immense potential in uses on the surface and inside of a living body. Here, the recent progress of liquid metal‐based wearable electronic devices for healthcare with respect to the featured properties and the processing technologies is discussed. Representative examples of applications such as biosensors, neural interfaces, and a soft interconnection for devices are reviewed. The current challenges and prospects for further development are also discussed, and the future directions of advances in the latest research are explored.

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Section: Applicationsmentioning

confidence: 99%

Section: Applicationsmentioning

confidence: 99%

Liquid Metal‐Based Soft Electronics for Wearable Healthcare

Park

Lee

Jang

et al. 2021

Adv Healthcare Materials

156

100

View full text Add to dashboard Cite

show abstract

“…Firstly, the eutectic gallium-indium (EGaIn) alloy (melting point at 15°C) is dispersed into nanoparticles (average size 636:9 ± 6:4 nm) (Figure 1(b) and Figure S1) by probe sonication assisted by polyvinyl pyrrolidone (PVP) as surfactant. After filtrating the EGaIn nanoparticles onto filter paper where they form a uniform film, they are mechanically sintered to restore their electric conductivity [30]. This destroys the oxide shell of the LM nanoparticle, and the conductive LM cores are fused together forming a…”

Section: Introductionmentioning

confidence: 99%

Liquid Metal-Based Epidermal Flexible Sensor for Wireless Breath Monitoring and Diagnosis Enabled by Highly Sensitive SnS ₂ Nanosheets

et al. 2021

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Real-time wireless respiratory monitoring and biomarker analysis provide an attractive vision for noninvasive telemedicine such as the timely prevention of respiratory arrest or for early diagnoses of chronic diseases. Lightweight, wearable respiratory sensors are in high demand as they meet the requirement of portability in digital healthcare management. Meanwhile, high-performance sensing material plays a crucial role for the precise sensing of specific markers in exhaled air, which represents a complex and rather humid environment. Here, we present a liquid metal-based flexible electrode coupled with SnS2 nanomaterials as a wearable gas-sensing device, with added Bluetooth capabilities for remote respiratory monitoring and diagnoses. The flexible epidermal device exhibits superior skin compatibility and high responsiveness (1092%/ppm), ultralow detection limits (1.32 ppb), and a good selectivity of NO gas at ppb-level concentrations. Taking advantage of the fast recovery kinetics of SnS2 responding to H2O molecules, it is possible to accurately distinguish between different respiratory patterns based on the amount of water vapor in the exhaled air. Furthermore, based on the different redox types of H2O and NO molecules, the electric signal is reversed once the exhaled NO concentration exceeds a certain threshold that may indicate the onset of conditions like asthma, thus providing an early warning system for potential lung diseases. Finally, by integrating the wearable device into a wireless cloud-based multichannel interface, we provide a proof-of-concept that our device could be used for the simultaneous remote monitoring of several patients with respiratory diseases, a crucial field in future digital healthcare management.

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“…This feature enables LM 4 nanoparticle ink to form high resolution conductive traces printed using different additive manufacturing techniques (i.e., inkjet printing, nozzle dispensing, ballpoint writing) for stretchable and reconfigurable interconnections. 29,[51][52][53][54][55] Despite this, the rigid and insulative oxide interface of LM nanoparticles pose a challenge to create conductive traces. [56][57][58] Several techniques ranging from mechanical, 51,52,59 thermal, 60 and laser-based [61][62][63] activations exist for coalescing the LM nanoparticles.…”

mentioning

confidence: 99%

“…29,[51][52][53][54][55] Despite this, the rigid and insulative oxide interface of LM nanoparticles pose a challenge to create conductive traces. [56][57][58] Several techniques ranging from mechanical, 51,52,59 thermal, 60 and laser-based [61][62][63] activations exist for coalescing the LM nanoparticles. However, the ideal sintering strategy for LM nanoparticles will depend on the encapsulating material, interfacial surface modifications or functionalization, size of dispersed LM nanoparticles, and desired resolution of the conductive traces.…”

mentioning

confidence: 99%