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stretchable nanogenerators for scavenging mechanical energy

Nano Research 2023年第9期16卷 11682-11697页

作者： Chong Guo Lan Xu Yuan Su Hongwei Li Mei Zhang Ya Yang CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing 101400China Beijing Key Laboratory of Clothing Materials R&D and Assessment Beijing Engineering Research Center of Textile NanofiberSchool of Materials Design and EngineeringBeijing Institute of Fashion TechnologyBeijing 100029China School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing 100049China Center on Nanoenergy Research School of Physical Science and TechnologyGuangxi UniversityNanning 530004China

Using stretchable nanogenerators to obtain disordered mechanical energy from the environment is an ideal way to realize wearable power supply equipment and self-power electronic devices,and alleviate the energy *** is of great significance to integrate the stretchability into the nanogenerator,which can fit the complex shape of the target object better and is well suitable for wearable *** applied to the human body,it can directly harvest human body mechanical energy to power wearable electronic devices and get rid of the trouble of *** paper systematically reviewed nanogenerators in stretchability,focusing on stretchable triboelectric nanogenerators,stretchable piezoelectric nanogenerators,and stretchable hybrid *** physical mechanism,material selection,structure design,and output performance are discussed in *** is concluded that the fabrication methods of various devices can be broadly categorized into the two most important device types,namely fiber-like and planar.A detailed analysis of representative work and the latest progress in the past decade is *** is most important that excellent stretchability and high-power output are the key point to realize application value of stretchable *** addition,we discuss opportunities and challenges,as well as future development direction of stretchable nanogenerators.

关键词： stretchable wearable devices triboelectric nanogenerator piezoelectric effect hybrid nanogenerator

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stretchable on-skin touchless screen sensor enabled by ionic hydrogel

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Nano Research 2024年第5期17卷 4462-4470页

作者： Tianxing Feng Dan Ling Chaoyue Li Wentao Zheng Shichuan Zhang Chang Li Artem Emel’yanov Alexander S.Pozdnyakov Lijun Lu Yanchao Mao Key Laboratory of Materials Physics of Ministry of Education School of Physics and MicroelectronicsZhengzhou UniversityZhengzhou 450001China A.E.Favorsky Irkutsk Institute of Chemistry Siberian Branch of the Russian Academy of SciencesIrkutsk 664033Russian Federation

Screen sensors are the most commonly used human-machine interfaces in our everyday life,which have been extensively applied in personal electronics like *** screen sensors are attracting growing interest due to their distinct advantages of high interaction freedom,comfortability,and hand ***,the material compositions of current touchless screen sensors are rigid and fragile,hardly meeting the needs of wearable and stretchable on-skin electronics ***,these touchless screen sensors are also restricted by high power consumption,limited gesture types of recognition,and the requirement of light ***,we report a stretchable on-skin touchless screen sensor(OTSS)enabled by an ionic hydrogel-based triboelectric nanogenerator(TENG).Compared with current touchless screen sensors,the OTSS is stretchable,self-powered,and competent to recognize diverse gestures by making use of charges naturally carried on fingers without the need of sufficient light *** on-skin noncontact screen operating system is further demonstrated on the basis of the OTSS,which could unlock a cellphone interface in touchless operation mode on the human *** work for the first time introduces the on-skin touchless concept to screen sensors and offers a direction to develop new-generation screen sensors for future cellphones and personal electronics.

关键词： human-machine interface stretchable ionic hydrogel triboelectric nanogenerator self-powered sensor

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stretchable fiber strain sensors for wearable biomonitoring

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National Science Review 2024年第7期11卷 70-71页

作者： Shumao Xu Xiao Xiao Jun Chen Department of Bioengineering University of California

Wearable bioelectronics have gained significant attention since they may play a role in transforming current healthcare from a reactive and disease-centric model to a personalized one with a focus on disease preventio... 详细信息

关键词： strain fiber biomonitoring sensors stretchable wearable

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Multi-functional stretchable and flexible sensor array to determine the location, shape, and pressure: Application in a smart robot

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Science China(Technological Sciences) 2018年第8期61卷 1137-1143页

作者： HAN LiBiao DING JianNing WANG Shuai XU Jiang YUAN NingYi CHENG GuangGui LIU ZunFeng Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering Changzhou University Micro/Nano Science and Technology Center Jiangsu University State Key Laboratory of Medicinal Chemical Biology Key Laboratory of Functional Polymer

The rapid increase in the aging population prompts the development of wearable devices and sophisticated robots. With their ability to collect complex information about their surroundings via e-skins, robots could perform more dynamic and variable tasks such as rescue missions or caring for the elderly. In this paper, we present a new concept of utilizing a very simple, highly flexible and stretchable capacitor sensor array, that can be attached on the surface of a retractable robot hand to realize three functions: determining the location, shape, and pressure of an object. This adaptive sensing system is accomplished using capacitors connected by aligned carbon nanotube(CNT) films constructed on an elastomer dielectric material, which can reduce the requirement on the accuracy of the machine vision system. This study has a very broad application in the manufacture of intelligent software robots.

关键词： sensor array stretchable location shape pressure

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stretchable and environment-resistant doubly crosslinked hydrogel for all-in-one supercapacitor and strain sensors

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Journal of Materiomics 2024年第6期10卷 1186-1195页

作者： Chunlin Liu Le Jjiang Fenglin Zhao Qin Hu Yingge Zhang Xiaodan Sun Lianxin Peng School of Mechanical Engineering Chengdu UniversityChengdu 610106China Key Laboratory of Advanced Materials of Ministry of Education of China School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China Key Laboratory of Coarse Cereal Processing of Ministry of Agriculture and Rural Affairs Chengdu UniversityChengdu 610106China

Despite their importance as components for flexible electronics,most stretchable hydrogels suffer from incomplete recovery after deformation,are prone to failure upon long-term repeated stretching,and cannot be exploited at subzero temperatures because of the freezing of their constituent ***-quently,strategies for circumventing these drawbacks are highly sought *** study describes the synthesis of a doubly(chemically and physically)crosslinked hydrogel from gelatin and methacrylic acid and demonstrates the suitability of this material for the fabrication of high-performance stretchable and environment-resistant supercapacitors and strain *** performance of this supercapacitor(areal capacitance=1,210.2 mF/cm^(2) at a current density of 1 mA/cm^(2),maximum energy density=158.8μW.h/cm^(-1),maximum power density=659.5μW/cm^(2))was superior to that of most of integrated super-capacitors reported to date and was hardly affected by stretchable,low temperatures,bending,ice-cold water and strong acid/alkali solutions or long-term ***,a strain sensor based on the above hydrogel was capable of accurately capturing human body motions when affixed to skin and recognising mouse movement(even in humid environments)after implantation into mouse *** work may pave the way to high-performance stretchable and environment-resistant wearable electronics.

关键词： Doubly crosslinked hydrogel stretchable Environment-resistant All-in-one supercapacitor Strain sensor

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Flexible and stretchable metal oxide gas sensors for healthcare

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Science China(Technological Sciences) 2019年第2期62卷 209-223页

作者： ZHENG XiaoQi CHENG HuanYu Department of Engineering Science and Mechanics The Pennsylvania State University University Park School of Physical Science and Technology ShanghaiTech University Materials Research Institute the Pennsylvania State University University Park

Capable of measuring volatile biomarker produced by the metabolism from several secretion pathways, flexible and stretchable metal oxide gas sensors have received increasing attention and their development for healthcare starts to gain *** of semiconducting metal oxide on a soft, thin, flexible substrate is the key to enable the flexible property to the gas sensor and such integration typically involves either a direct growth or post transfer of the metal oxide on or to the flexible substrate. In addition to the planar plastic substrate, textile represents another important class of flexible substrates due to its ease of integration with clothing. Moreover, the integration of metal oxide on a single fiber provides a great versatility for different applications. Though flexible sensors can easily conform to the developable surface(e.g., cylinder or cone) from a bending deformation, the conformal contact between the sensor and the tissue surface that is often non-developable requires the sensor to be capable of stretching. Due to the intrinsically brittle nature of the semiconducting metal oxide, several stretchable structures have been explored. Despite the great strides made to the burgeoning area of flexible and stretchable metal oxide gas sensors,grand challenges still need to be overcome before the technology can be applied for the practical application. The selected challenges discussed in this mini-review also represent a fraction of possibilities and opportunities for the research community in the future.

关键词： metal oxide gas sensor flexible and stretchable properties structural design strategies volatile biomarker

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Printing practice for the fabrication of flexible and stretchable electronics

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Science China(Technological Sciences) 2019年第2期62卷 224-232页

作者： CUI Zheng Printable Electronics Research Center Suzhou Institute of Nanotech and Nano-bionics Chinese Academy of Sciences

Recently, flexible and stretchable electronics have experienced tremendous surge due to their promised applications in fields such as wearable electronics, portable energy devices, flexible display, and human-skin sensors. In order to fabricate flexible and stretchable electronics, a high-throughput, cost-saving, and eco-friendly manufacturing technology is required. Printing, which is an additive patterning process, can meet those requirements. In this article, printing fabrication is compared with conventional lithography process. Practices at the author's group utilizing printing for the fabrication of flexible thin-film transistors, flexible hybrid circuits and stretchable systems are presented, which has proven that printing can indeed be a viable method to fabricate flexible and stretchable electronics.

关键词： printed electronics flexible electronics stretchable electronics electronic inks

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An Overview of stretchable Supercapacitors Based on Carbon Nanotube and Graphene

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Chinese Journal of Polymer Science 2020年第5期38卷 491-505,I0006页

作者： Wen-Le Ma Zhi-Hao Cai Yi Zhang Zi-Yuan Wang Lun Xia Su-Ping Ma Guang-Hao Li Yi Huang National Institute for Advanced Materials Tianjin Key Laboratory of Metal and Molecule Based Material ChemistryKey Laboratory of Functional Polymer MaterialsCollaborative Innovation Center of Chemical Science and Engineering(Tianjin)School of Materials Science and EngineeringNankai UniversityTianjin 300350China Beijing Institute of Aeronautical Materials Beijing 100095China

The wearable demand of modern electronic devices makes flexible and stretchable energy storage device urgently *** and flexible supercapacitors(SCs)are energy storage devices that provide ultrahigh power density while having long-term durability,high security,and electrochemical *** different SCs electrode materials,CNTs and graphene-based materials exhibit great potential in terms of stretchable SCs due to its ultrahigh electrical conductivity,large specific surface area and good mechanical *** this review,the state-of-the-art process and achievements in the field of stretchable SCs enabled by CNTs and graphene are presented,which include the novel design strategy,mechanical and electrochemical *** final section highlights current challenges and future perspectives on research in this thriving field.

关键词： stretchable Supercapacitors Carbon materials Graphene CNTs

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Deep-elliptical-silver-nanowell arrays (d-EAgNWAs) fabricated by stretchable imprinting combining colloidal lithography: A highly sensitive plasmonic sensing platform

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Nano Research 2019年第4期12卷 845-853页

作者： Xueyao Liu Wendong Liu Bai Yang State Key Laboratory of Supramolecular Structure and Materials College of Chemistry Jilin University Changchun 130012 China Max Planck Institute for Polymer Research Acker mannweg 10 D-55128 Mainz Rheinland-Pfalz Germany

Elliptical metallic nanohole arrays possess much higher transmission and enhanced sensitivity compared with circular nanohole ***,fabricating elliptical metallic nanohole arrays in large area with highly tunable aspect ratio remains a ***,a brand-new method combining stretchable imprinting with colloidal lithography is figured out to fabricate deep-elliptical-silver-nanowell arrays (d-EAgNWAs).In this method,large area highly ordered silicon nanopillar arrays fabricated by colloidal lithography were taken as a master to transfer large area polydimethylsiloxane (PDMS) nanohole *** from the high elasticity of PDMS mold,the aspect ratio of d-EAgNWAs achieved can be facilely regulated from 1.7 to *** optimization of polarization direction and the structural parameters including nanowell depth,aspect ratio,and hole size,the sensing performance of d-EAgNWAs was finally improved up to 1,414.1 nm/*** best sensing behaved d-EAgNWAs were employed as an immunoassay platform finally to prove their great potential in label-free biosensing.

关键词： plasmonic sensor colloidal lithography nanohole deep-elliptical-silver-nanowell arrays stretchable imprinting

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Spiral Steel Wire Based Fiber-Shaped stretchable and Tailorable Triboelectric Nanogenerator for Wearable Power Source and Active Gesture Sensor

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Nano-Micro Letters 2019年第3期11卷 36-45页

作者： Lingjie Xie Xiaoping Chen Zhen Wen Yanqin Yang Jihong Shi Chen Chen Mingfa Peng Yina Liu Xuhui Sun Institute of Functional Nano and Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon.Based Functional Materials and DevicesSoochow UniversitySuzhou215123People’s Republic of China Nantong Textile and Silk Industrial Technology Research Institute Jiangsu Industrial Technology ResearchInstitute of Textile and SilkNantong 226314People’s Republic of China Department of Mathematical Sciences Xi’an Jiaotong-Liverpool UniversitySuzhou215123People’s Republic of China

Continuous deforming always leads to the performance degradation of a flexible triboelectric nanogenerator due to the Young’s modulus mismatch of different functional *** this work,we fabricated a fiber-shaped stretchable and tailorable triboelectric nanogenerator(FST-TENG)based on the geometric construction of a steel wire as electrode and ingenious selection of silicone rubber as triboelectric *** to the great robustness and continuous conductivity,the FST-TENGs demonstrate high stability,stretchability,and even *** a single device with ~6 cm in length and ~3 mm in diameter,the open-circuit voltage of ~59.7 V,transferred charge of ~23.7 nC,short-circuit current of ~2.67 μA and average power of ~2.13 μW can be obtained at 2.5 *** knitting several FST-TENGs to be a fabric or a bracelet,it enables to harvest human motion energy and then to drive a wearable electronic ***,it can also be woven on dorsum of glove to monitor the movements of gesture,which can recognize every single finger,different bending angle,and numbers of bent finger by analyzing voltage signals.

关键词： Triboelectric nanogenerator stretchable Human motion energy Wearable power source Active gesture sensor

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