Tissue Adhesive Hydrogel Bioelectronics

2021 ◽  
Author(s):  
Shengnan Li ◽  
Yang Cong ◽  
Jun Fu
Keyword(s):  
Mechanical Properties ◽  
Wearable Devices ◽  
Tissue Adhesive ◽  
Electronic Skin ◽  
Biomedical Electronics

Flexible bioelectronics have promising applications in electronic skin, wearable devices, and biomedical electronics etc. Hydrogels have unique advantages for bioelectronics due to the tissue-like mechanical properties and excellent biocompatibility. Particularly,...

scholarly journals All-soft multiaxial force sensor based on liquid metal for electronic skin

2021 ◽  
Vol 9 (1) ◽  
Author(s):  
Kyuyoung Kim ◽  
Junseong Ahn ◽  
Yongrok Jeong ◽  
Jungrak Choi ◽  
Osman Gul ◽  
...  
Keyword(s):  
Liquid Metal ◽  
Force Sensor ◽  
Wearable Devices ◽  
Microchannel Array ◽  
Electronic Skin ◽  
Microchannel Arrays ◽  
Mechanical Durability ◽  
Physical Stimuli ◽  
Dome Structure ◽  
Simulation Results

AbstractElectronic skin (E-skin) capable of detecting various physical stimuli is required for monitoring external environments accurately. Here, we report an all-soft multiaxial force sensor based on liquid metal microchannel array for electronic skin applications. The proposed sensor is composed of stretchable elastomer and Galinstan, a eutectic gallium-indium alloy, providing a high mechanical flexibility and electro-mechanical durability. Liquid metal microchannel arrays are fabricated in multilayer and positioned along a dome structure to detect multi-directional forces, supported by numerical simulation results. By adjusting the height of the dome, we could control the response of the multiaxial sensor with respect to the deflection. As a demonstration of multiaxial force sensing, we were able to monitor the direction of multidirectional forces using a finger by the response of liquid metal microchannel arrays. This research could be applied to various fields including soft robotics, wearable devices, and smart prosthetics for artificial intelligent skin applications.

scholarly journals Review: Sensors for Biosignal/Health Monitoring in Electronic Skin

Polymers ◽  
2021 ◽  
Vol 13 (15) ◽  
pp. 2478
Author(s):  
Hyeon Seok Oh ◽  
Chung Hyeon Lee ◽  
Na Kyoung Kim ◽  
Taechang An ◽  
Geon Hwee Kim
Keyword(s):  
High Performance ◽  
Active Component ◽  
Tactile Sensor ◽  
Wearable Devices ◽  
Advanced Technology ◽  
Electronic Skin ◽  
Points Of View ◽  
External Stimuli ◽  
Flexible Component

Skin is the largest sensory organ and receives information from external stimuli. Human body signals have been monitored using wearable devices, which are gradually being replaced by electronic skin (E-skin). We assessed the basic technologies from two points of view: sensing mechanism and material. Firstly, E-skins were fabricated using a tactile sensor. Secondly, E-skin sensors were composed of an active component performing actual functions and a flexible component that served as a substrate. Based on the above fabrication processes, the technologies that need more development were introduced. All of these techniques, which achieve high performance in different ways, are covered briefly in this paper. We expect that patients’ quality of life can be improved by the application of E-skin devices, which represent an applied advanced technology for real-time bio- and health signal monitoring. The advanced E-skins are convenient and suitable to be applied in the fields of medicine, military and environmental monitoring.

scholarly journals Self-powered ultrasensitive and highly stretchable temperature-strain sensing composite yarns

2021 ◽  
Author(s):  
Kening Wan ◽  
Yi Liu ◽  
Giovanni Santagiuliana ◽  
Giandrin Barandun ◽  
Prospero Junior Taroni ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Energy Storage ◽  
Electrical Conduction ◽  
Wearable Devices ◽  
Strain Sensing ◽  
Highly Stretchable ◽  
Self Powered ◽  
Temperature Strain ◽  
Single Material

With the emergence of stretchable/wearable devices, functions, such as sensing, energy storage/harvesting, electrical conduction, should ideally be carried out by a single material, while retaining its mechanical properties (e.g. ability...

scholarly journals Flexible and Transparent Pressure Sensor Based on CNTs Film Microstructure

2021 ◽  
Author(s):  
Liangliang Liu ◽  
Xin Yan
Keyword(s):  
Pressure Sensor ◽  
Production Cost ◽  
Composite Electrode ◽  
Pressure Sensors ◽  
Wearable Devices ◽  
Capacitive Pressure Sensor ◽  
Detection Range ◽  
Electronic Skin ◽  
Film Microstructure ◽  
Flexible Pressure Sensors

Abstract In recent years, capacitive flexible pressure sensors have been widely studied in electronic skin and wearable devices. The traditional capacitive pressure sensor has a higher production cost due to micro-nano machining technology such as lithography. This paper presents a flexible transparent capacitive pressure sensor based on a PDMS/CNT composite electrode, simple, transparent, flexible, and arrays without lithography. The sensitivity of the device has been tested to 0.0018 kpa -1 with a detection range of 0-30 kPa. The sensor is capable of rapidly detecting different pressures and remains stable after 100 load-unload tests.

Mechanical Properties of Biomimetic Tissue Adhesive Based on the Microbial Transglutaminase-Catalyzed Crosslinking of Gelatin

2004 ◽  
Vol 5 (4) ◽  
pp. 1270-1279 ◽  
Author(s):  
Martin K. McDermott ◽  
Tianhong Chen ◽  
Christina M. Williams ◽  
Kolleen M. Markley ◽  
Gregory F. Payne
Keyword(s):  
Mechanical Properties ◽  
Microbial Transglutaminase ◽  
Tissue Adhesive

Advances in Self-Powered Triboelectric Pressure Sensors

2021 ◽  
Author(s):  
Hao Lei ◽  
Yunfeng Chen ◽  
Zhenqiu Gao ◽  
Zhen Wen ◽  
Xuhui Sun
Keyword(s):  
Internet Of Things ◽  
Health Monitoring ◽  
Rapid Development ◽  
Pressure Sensors ◽  
Wearable Devices ◽  
Electronic Skin ◽  
Potential Applications ◽  
Self Powered

Pressure sensors have attracted much attention for their potential applications in health monitoring, wearable devices, electronic skin and smart robots, etc. With the rapid development of Internet of Things, considering...

Tough, Adhesive, Self-healable, and Antibacterial Plant-inspired Hydrogel Based on Pyrogallol-Borax Dynamic Cross-linking

2021 ◽  
Author(s):  
Chao Ma ◽  
Huiwen Pang ◽  
Hongguang Liu ◽  
Qian Yan ◽  
Jianzhang Li ◽  
...  
Keyword(s):  
Antibacterial Properties ◽  
Wearable Devices ◽  
Skin Wound ◽  
Wound Dressings ◽  
Cross Linking ◽  
Self Healing ◽  
Electronic Skin

Multifunctional hydrogels that integrate stretchability, adhesion, self-healing, and antibacterial properties may find use in a variety of fields including electronic skin, wound dressings, and wearable devices; however, traditional hydrogels often...

scholarly journals Liquid metal-tailored gluten network for protein-based e-skin

2021 ◽  
Author(s):  
Bin Chen ◽  
Yudong Cao ◽  
Zhuo Yan ◽  
Rui Liu ◽  
Yunjiao Zhao ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Disulfide Bonds ◽  
Protein Structures ◽  
Three Dimensional ◽  
Driving Mechanism ◽  
Self Healing ◽  
Structure Rearrangement ◽  
Electronic Skin ◽  
Regulation Method ◽  
Human Motions

Abstract Designing electronic skin (e-skin) with proteins is a critical way to endow e-skin with biocompatibility, but engineering protein structures to achieve controllable mechanical properties and self-healing ability remains a challenge. Here, we develop a hybrid gluten network through the incorporation of an eutectic gallium indium alloy (EGaIn) to design a self-healable e-skin with improved mechanical properties. The intrinsic reversible disulfide bonds/sulfhydryl groups reconfiguration of gluten networks is explored as a driving mechanism to introduce EGaIn as chemical cross-linkers to create hierarchical sulphur bonds, thus inducing the secondary structure rearrangement of gluten to form additional β-sheets as physical cross-linkers. Remarkably, this strategy allows the gluten network to realize a synthetic material-like stretchability (>1600%) and to endure a three-dimensional strain change. The obtained e-skin is biocompatible and biodegradable, and can sense strain changes from different scale human motions. The protein network micro-regulation method paves the way for future skin-like protein-based e-skin.

Programming electronic skin with diverse skin-like properties

2021 ◽  
Author(s):  
Jinjian Huang ◽  
Ye Liu ◽  
Xiang Chi ◽  
Yungang Jiang ◽  
Ziyan Xu ◽  
...  
Keyword(s):  
Wearable Devices ◽  
Interactive Technology ◽  
Electronic Skin ◽  
Physical Stimuli ◽  
Native Skin

Simulating the comprehensive functions of native skin—and not simply the perception of external physical stimuli—by electronic skin (e-skin) has gathered increasing attention in the development of wearable devices and human-interactive technology.

Sign in / Sign up

Export Citation Format

Share Document