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Rare Metals 2024年第6期43卷 2747-2757页

作者： Xi-Di Sun Jun-Yang An Yi-Qi Sun Xin Guo Jing Wu Jiang-Bo Hua Meng-Rui Su Yi Shi Li-Jia Pan Collaborative Innovation Center of Advanced Microstructures School of Electronic Science and EngineeringNanjing UniversityNanjing 210093China

stretchable electronics that monitor joint activity and treat diseases based on liquid metal could be used in the development of healthcare *** devices can be seamlessly integrated with human ***,most high-precision microstructures and complex patterns are difficult to fabricate due to the limitations of conventional fabrication solutions,resulting in suboptimal performance under practical ***,a liquid-metal stretchable system utilizing natural leaf veins was reported as microstructures,which was based on a biomimetic concept and utilized an all-solution process for the preparation of complex *** systems are ultra-high tensile(800%tensile strain),environmentally stable(20 days)and mechanically durable(300-cycle).The system can accurately recognize the wearer's finger bending level as well as simple gesture *** the same time,the system acts as a wearable heater,which can realize the fast heating behavior of heating up to 50℃in 3 min under the human body-safe voltage(1.5 V).The tensile stability is demonstrated by the heterogeneous integration of lasers(405 nm)with the system interconnects for a stretchable and wearable light source.

关键词： stretchable electronics Liquid metal stretchable conductor Vein Bionicist electronics

Emerging interactively stretchable electronics with optical and electrical dual-signal feedbacks based on structural color materials

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Nano Research 2024年第3期17卷 1837-1855页

作者： Jialin Wang Kai Zhao Changqing Ye Yanlin Song School of Materials Science and Engineering Suzhou University of Science and TechnologySuzhou 215009China Key Laboratory of Green Printing Institute of ChemistryChinese Academy of SciencesBeijing 100190China

The booming development of wearable devices has aroused increasing interests in flexible and stretchable *** mechanosensory functionality,these devices are highly desirable on account of their wide range of applications in electronic skin,personal healthcare,human–machine interfaces and ***,they are mostly limited by single electrical signal feedback,restricting their diverse applications in visualized mechanical *** by the mechanochromism of structural color materials,interactively stretchable electronics with optical and electrical dual-signal feedbacks are recently emerged as novel sensory platforms,by combining both of their sensing mechanisms and ***,recent studies on interactively stretchable electronics based on structural color materials are *** a brief introduction of their basic components(i.e.,stretchable electronics and mechanochromic structural color materials),two types of interactively stretchable electronics with respect to the nanostructures of mechanochromic materials are outlined,focusing primarily on their design considerations and fabrication ***,the main challenges and future perspectives of these emerging devices are discussed.

关键词： stretchable electronics structural color materials interactive sensing mechanochromism dual-signal feedbacks

A strain-isolation design for stretchable electronics

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Acta Mechanica Sinica 2010年第6期26卷 881-888页

作者： Jian Wu Ming Li Wei-Qiu Chen Dae-Hyeong Kim Yun-Soung Kim Yong-Gang Huang Keh-Chih Hwang Zhan Kang John A.Rogers Departments of Civil and Environmental Engineering and Mechanical EngineeringNorthwestern University EvanstonIL 60208USA Department of Engineering Mechanics Dalian University of TechnologyDalian 116024China Department of Engineering Mechanics Zhejiang University Hangzhou 310058China Materials Research Laboratory Department of Materials Science and EngineeringBeckman Institute.University of Illinois UrbanaIL 61801USA AML Department of Engineering Mechanics Tsinghua UniversityBeijing 100084China Departments of Chemistry Electrical and Computer Engineering and Mechanical Science and EngineeringUniversity of Illinois UrbanaIL 61801USA

stretchable electronics represents a direction of recent development in next-generation semiconductor *** systems have the potential to offer the performance of conventional wafer-based technologies,but they can be stretched like a rubber band,twisted like a rope, bent over a pencil,and folded like a piece of *** the active devices from strains associated with such deformations is an important aspect of *** strategy involves the shielding of the electronics from deformation of the substrate through insertion of a compliant adhesive layer. This paper establishes a simple,analytical model and validates the results by the finite element *** results show that a relatively thick,compliant adhesive is effective to reduce the strain in the electronics,as is a relatively short film.

关键词： Strain isolation Thin film Substrate Adhesive stretchable electronics

Mechanics of nonbuckling interconnects with prestrain for stretchable electronics

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Applied Mathematics and Mechanics(English Edition) 2021年第5期42卷 689-702页

作者： Zixuan LU Liang GUO Hongyu ZHAO State Key Laboratory of Nonlinear Mechanics Institute of MechanicsChinese Academy of SciencesBeijing 100190China School of Engineering Science University of Chinese Academy of SciencesBeijing 100049China

The performance of the flexibility and stretchability of flexible electronics depends on the mechanical structure design,for which a great progress has been made in past *** use of prestrain in the substrate,causing the compression of the transferred interconnects,can provide high elastic ***,the nonbuckling interconnects have been designed,where thick bar replaces thin ribbon layout to yield scissor-like in-plane deformation instead of in-or out-of-plane buckling *** nonbuckling interconnect design achieves significantly enhanced ***,combined use of prestrain and nonbuckling interconnects has not been *** paper aims to study the mechanical behavior of nonbuckling interconnects bonded to the prestrained substrate analytically and *** is found that larger prestrain,longer straight segment,and smaller arc radius yield smaller strain in the *** the other hand,larger prestrain can also cause larger strain in the interconnects after releasing the ***,the optimization of the prestrain needs to be found to achieve favorable stretchability.

关键词： nonbuckling interconnect prestrain finite deformation stretchability stretchable electronics

Recent advances in flexible and stretchable electronics, sensors and power sources

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Science China Chemistry 2012年第5期55卷 718-725页

作者： TOK Jeffrey B.-H. Department of Chemical Engineering Stanford University Stanford CA 94305 USA

There has been ongoing keen interest to mold electronic devices into desired shapes and be laid on desired configurable surfaces. In specific, the ability to design materials that can bend, twist, compress and stretch repeatedly, while still able to maintain its full capability as conductors or electrodes, has led to numerous efforts to develop flexible and stretchable (bio)devices that are both technologically challenging and environmentally friendly (e.g. biodegradable). In this review, we highlight several recent significant results that have made impacts toward the field of flexible and stretchable electronics, sensors and power sources.

关键词： organic transistors flexible electronics stretchable electronics electronic skin sensor

MECHANICS ANALYSIS OF TWO-DIMENSIONALLY PRESTRAINED ELASTOMERIC THIN FILM FOR stretchable electronics

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Acta Mechanica Solida Sinica 2010年第6期23卷 592-599页

作者： Ming Li JianUang Xiao Jian Wu Rak-Hwan Kim Zhan Kang Yonggang Huang John A. Rogers State Key Laboratory of Structural Analysis for Industrial Equipment Dalian University of Technology Dalian 116024 China Departments of Civil and Environmental Engineering and Mechanical Engineering Northwestern University Evanston IL 60208 USA Department of Materials Science and Engineering Beckman Institute for Advanced Science and Technology and Frederick Seitz Materials Research Laboratory University of Illinois at Urbana-Champaign Urbana IL 61801 USA

Various methods have been developed to fabricate highly stretchable electronics. Recent studies show that over 100% two dimensional stretchability can be achieved by mesh structure of brittle functioning devices interconnected with serpentine bridges. Kim et al show that pressing down an inflated elastomeric thin film during transfer printing introduces two di- mensional prestrain, and therefore further improves the system stretchability. This paper gives a theoretical study of this process, through both analytical and numerical approaches. Simple analytical solutions are obtained for meridional and circumferential strains in the thin film, as well as the maximum strain in device islands, which all agree reasonably well with finite element analysis.

关键词： stretchable electronics shell soft materials

Mechanics and thermal management of stretchable inorganic electronics

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National Science Review 2016年第1期3卷 128-143页

作者： Jizhou Song Xue Feng Yonggang Huang Department of Engineering Mechanics and Soft Matter Research Center Zhejiang University Key Laboratory of Applied Mechanics Department of Engineering MechanicsTsinghua University Center for Mechanics and Materials Tsinghua University Department of Civil and Environmental Engineering Department of Mechanical EngineeringCenter for Engineering and Healthand Skin Disease Research CenterNorthwestern University

stretchable electronics enables lots of novel applications ranging from wearable electronics, curvilinear electronics to bio-integrated therapeutic devices that are not possible through conventional electronics that is rigid and flat in nature. One effective strategy to realize stretchable electronics exploits the design of inorganic semiconductor material in a stretchable format on an elastomeric substrate. In this review, we summarize the advances in mechanics and thermal management of stretchable electronics based on inorganic semiconductor materials. The mechanics and thermal models are very helpful in understanding the underlying physics associated with these systems, and they also provide design guidelines for the development of stretchable inorganic electronics.

关键词： stretchable electronics buckling inorganic semiconductor material thin film

From liquid metal to stretchable electronics:Overcoming the surface tension

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Science China Materials 2022年第8期65卷 2072-2088页

作者： Zixu Yang Dan Yang Xizheng Zhao Qinyi Zhao Ming Zhu Yan Liu Yu Wang Weihong Lu Dianpeng Qi MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001China National and Local Joint Engineering Laboratory for Synthesis Transformation and Separation of Extreme Environmental NutrientsHarbin Institute of TechnologyHarbin 150001China School of Materials Science&Engineering Zhengzhou UniversityZhengzhou 450001China

The field of stretchable electronics mainly includes electronic products conformal with tissues,being integrated into skin or *** these products need to work during deformation,their requirements for materials focus on stretchability and *** metals are excellent materials with these ***,liquid metals have extremely high surface tension at room temperature,which will spontaneously form a spherical shape and are difficult to form the shape required by stretchable devices,which is the biggest obstacle to their development in this emerging ***,the emphasis is placed on the principle of overcoming the high surface tension in this review,and various methods of using liquid metals to fabricate stretchable electronic devices based on these principles have been *** metals show promise in the convenience of sensing,energy harvesting,*** existing challenges and opportunities are also discussed here.

关键词： liquid metals EGaIn Galinstan stretchable electronics surface tension

Cost-effective fabrication of liquid metals via a laser induced graphene stamp for highly-stretchable integrated optoelectronics

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Nano Research 2024年第8期17卷 7603-7613页

作者： Weiqi Sun Li Xiang Zebang Luo Hui Wang Dong Li Anlian Pan College of Materials Science and Engineering Hunan UniversityChangsha 410082China

stretchable electronics have found widespread applications in various fields such as wearable electronics,soft robots,and *** an important promising alternative of traditional rigid conductors,liquid metals have demonstrated immense potential to provide high conductivity and stretchability for the stretchable electronic ***,limited by their fluidity and high surface tension,challenges remain in achieving liquid metal patterns with low-cost,high-precision,large-scale,and complex ***,a fabrication technique was proposed based on laser-induced graphene(LIG)stamps to enable liquid metal self-selectively adhere to *** metal patterns could thus be achieved in different designed geometries and could be transferred onto stretchable *** liquid metal patterns exhibit exceptional electrical conductivity(3.24×10^(6)S/m even under 1000%strain),high stretchability(1000%strain,maximum of 2500%),small resistance changes under significant deformations(with a quality factor of 62.5 under 1000%strain),and high resolution(down to 50μm).Utilizing the patterned liquid metals,a stretchable integrated multifunctional optoelectronic system was demonstrated,encompassing a stretchable display matrix,a pressure sensor array,a wireless powering coil,and cardiovascular sensors,which further highlight the remarkable application potential of liquid metals in optoelectronic user-interaction and advanced physiological monitoring.

关键词： liquid metal wettability selective adhesion transfer printing stretchable electronics

A Generic Strategy to Create Mechanically Interlocked Nanocomposite/Hydrogel Hybrid Electrodes for Epidermal electronics

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Nano-Micro Letters 2024年第5期16卷 120-133页

作者： Qian Wang Yanyan Li Yong Lin Yuping Sun Chong Bai Haorun Guo Ting Fang Gaohua Hu Yanqing Lu Desheng Kong College of Engineering and Applied Sciences National Laboratory of Solid State Microstructureand Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210023People’s Republic of China State Key Laboratory of Analytical Chemistry for Life Science and Jiangsu Key Laboratory of Artificial Functional MaterialsNanjing UniversityNanjing 210023People’s Republic of China College of Chemical Engineering and Technology Engineering Research Center of Seawater Utilization Technology of Ministry of EducationState Key Laboratory of Reliability and Intelligence of Electrical EquipmentHebei University of TechnologyTianjin 300130People’s Republic of China Key Laboratory of Intelligent Optical Sensing and Manipulation Nanjing UniversityNanjing 210093People’s Republic of China

stretchable electronics are crucial enablers for next-generation wearables intimately integrated into the human *** the primary compliant conductors used in these devices,metallic nanostructure/elastomer composites often struggle to form conformal contact with the textured *** electrodes have been consequently developed based on conductive nanocomposite and soft hydrogels to establish seamless skin-device ***,chemical modifications are typically needed for reliable bonding,which can alter their original *** overcome this limitation,this study presents a facile fabrication approach for mechanically interlocked nanocomposite/hydrogel hybrid *** this physical process,soft microfoams are thermally laminated on silver nanowire nanocomposites as a porous interface,which forms an interpenetrating network with the *** microfoam-enabled bonding strategy is generally compatible with various *** resulting interlocked hybrids have a 28-fold improved interfacial toughness compared to directly stacked *** electrodes achieve firm attachment to the skin and low contact impedance using tissue-adhesive *** have been successfully integrated into an epidermal sleeve to distinguish hand gestures by sensing mus-cle *** nanocomposite/hydrogel hybrids reported here offer a promising platform to combine the benefits of both materials for epidermal devices and systems.

关键词： stretchable electronics Epidermal electronics Silver nanowire Conductive nanocomposites Hydrogel