The new generation of soft and wearable electronics for health monitoring in varying environment: From normal to extreme conditions

Niu, Yan; Liu, Hao; He, Rongyan; Li, Zedong; Ren, Hui; Gao, Bin; Guo, Hui; Genin, Guy M.; Xu, Feng

doi:10.1016/j.mattod.2020.10.004

Cited by 162 publications

(99 citation statements)

References 194 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[ 1–8 ] However, practical applications may involve significantly varying thermal and hydrated environment (e.g., cold, hot, dry, or wet conditions), inducing challenges to hydrogel electronics from the perspectives of mechanics, functionality, and human–device integration. [ 9 ] For example, hydrogel will suffer from declined stretchability at low or high temperatures resulting from the freezing or evaporation of water molecules inside the polymer network. [ 10 ] The mechanical property of hydrogel may also be affected due to dehydration in long‐term uses.…”

Section: Introductionmentioning

confidence: 99%

Environmentally Compatible Wearable Electronics Based on Ionically Conductive Organohydrogels for Health Monitoring with Thermal Compatibility, Anti‐Dehydration, and Underwater Adhesion

Niu

Liu

et al. 2021

Small

Self Cite

View full text Add to dashboard Cite

Hydrogel‐based electronics have found widespread applications in soft sensing and health monitoring because of their remarkable biocompatibility and mechanical features similar to human skin. However, they are subjected to potential challenges like structural failure, functional degradation, and device delamination in practical applications, especially facing extreme environmental conditions (e.g., abnormal temperature and humidity). To address these, ionically conductive organohydrogel‐based soft electronics are developed, which can perform at subzero and elevated temperatures (thermal compatibility) as well as at dehydrated and hydrated environments (hydration compatibility) for extended applications. More specifically, gelatin/poly(acrylic acid–N‐hydrosuccinimide ester) (PAA–NHS ester)‐based ionic‐conductive organohydrogel is synthesized. By introducing a glycerol–water binary solvent system, the gel can maintain mechanical softness in a wide temperature range (from −80 to 60 °C). Besides, excellent conductivity is achieved under various conditions by soaking the gel into lithium chloride anhydrous (LiCl) solution. Strong adhesion with skin, even under water, can be realized by covalent bonds between NHS ester from gel and amino groups from human skin. The excellent performances of LiCl‐loaded PAA‐based organohydrogel (L‐PAA‐OH)‐based electronics are further demonstrated under freezing and high temperatures as well as underwater conditions, unveiling their promising prospects in wearable health monitoring in various conditions.

show abstract

Section: Introductionmentioning

confidence: 99%

Environmentally Compatible Wearable Electronics Based on Ionically Conductive Organohydrogels for Health Monitoring with Thermal Compatibility, Anti‐Dehydration, and Underwater Adhesion

Niu

Liu

et al. 2021

Small

Self Cite

View full text Add to dashboard Cite

show abstract

“…Flexible and stretchable bioelectronics featuring thin designs, soft mechanics, and wireless power/communication protocols have attracted significant attention as health monitoring and sensing platforms due to their intrinsic mechanical properties that realize conformal operation on body parts with complex geometries. 69 Examples include wearable strain sensors that track the mechanical deformation of internal/external body parts induced from breathing, talking, and/or other physical activities and reflect a resistive or capacitive change due to the deformation. 70 The strain sensors typically rely on triboelectric, 71,72 piezoelectric, [73][74][75] or pyroelectric 76,77 effects to translate the mechanical motion/deformation into a readable electrical signal.…”

Section: Motion Signal Monitoring With Soft Wearable Devicesmentioning

confidence: 99%

Flexible electronics with dynamic interfaces for biomedical monitoring, stimulation, and characterization

Guo

Avila

Xie

2021

Int Journal of Mech Sys Dyn

View full text Add to dashboard Cite

Recent developments in the fields of materials science and engineering technology (mechanical, electrical, biomedical) lay the foundation to design flexible bioelectronics with dynamic interfaces, widely used in biomedical/clinical monitoring, stimulation, and characterization. Examples of this technology include body motion and physiological signal monitoring through soft wearable devices, mechanical characterization of biological tissues, skin stimulation using dynamic actuators, and energy harvesting in biomedical implants. Typically, these bioelectronic systems feature thin form factors for enhanced flexibility and soft elastomeric encapsulations that provide skin-compliant mechanics for seamless integration with biological tissues. This review examines the rapid and continuous progress of bioelectronics in the context of design strategies including materials, mechanics, and structure to achieve high performance dynamic interfaces in biomedicine. It concludes with a concise summary and insights into the ongoing opportunities and challenges facing developments of bioelectronics with dynamic interfaces for future applications.

show abstract

“…Nowadays, electronic devices are transforming from solid, durable, single-shape styles to wearable, versatile, high-performance, and multifunctional components, among which the flexible electronics (FEs) have already sprung up and gained extensive attentions [1][2][3][4] . The appealing applications of FEs may at least include personalized mobile devices, healthcare systems, human-machine interfaces, soft robots, electronic skin, artificial intelligence (AI), and Internet of Things (IoT) [5][6][7][8] . To fabricate FEs, the soft, stretchable, foldable substrates are highly desired.…”

Section: Introductionmentioning

confidence: 99%

Green flexible electronics based on starch

Xiang

Liu

et al. 2022

npj Flex Electron

View full text Add to dashboard Cite

Flexible electronics (FEs) with excellent flexibility or foldability may find widespread applications in the wearable devices, artificial intelligence (AI), Internet of Things (IoT), and other areas. However, the widely utilization may also bring the concerning for the fast accumulation of electronic waste. Green FEs with good degradability might supply a way to overcome this problem. Starch, as one of the most abundant natural polymers, has been exhibiting great potentials in the development of environmental-friendly FEs due to its inexpensiveness, good processability, and biodegradability. Lots of remarks were made this field but no summary was found. In this review, we discussed the preparation and applications of starch-based FEs, highlighting the role played by the starch in such FEs and the impacts on the properties. Finally, the challenge was discussed and the outlook for the further development was also presented.

show abstract

The new generation of soft and wearable electronics for health monitoring in varying environment: From normal to extreme conditions

Cited by 162 publications

References 194 publications

Environmentally Compatible Wearable Electronics Based on Ionically Conductive Organohydrogels for Health Monitoring with Thermal Compatibility, Anti‐Dehydration, and Underwater Adhesion

Environmentally Compatible Wearable Electronics Based on Ionically Conductive Organohydrogels for Health Monitoring with Thermal Compatibility, Anti‐Dehydration, and Underwater Adhesion

Flexible electronics with dynamic interfaces for biomedical monitoring, stimulation, and characterization

Green flexible electronics based on starch

Contact Info

Product

Resources

About