Yongtao Yu,Yuelin Yu et al.Solvent-Resistant Wearable Triboelectric Nanogenerator for Energy-Harvesting and Self-Powered Sensors.Energy Environ.Mater.2024,7,e12700.On page 4 of this article,the first paragraph of 2.4,...Yongtao Yu,Yuelin Yu et al.Solvent-Resistant Wearable Triboelectric Nanogenerator for Energy-Harvesting and Self-Powered Sensors.Energy Environ.Mater.2024,7,e12700.On page 4 of this article,the first paragraph of 2.4,line 14(PDF version,same below),there is a spelling mistake of“sui,”.It should be changed to“suitable”.The denominator“dt”in the Equation(3)should be changed to“dt”.展开更多
Stretchable triboelectric nanogenerators(TENGs)have garnered significant attention as wearable power sources by enabling the realization of self-powered systems through integration with other wearable platforms.Howeve...Stretchable triboelectric nanogenerators(TENGs)have garnered significant attention as wearable power sources by enabling the realization of self-powered systems through integration with other wearable platforms.However,achieving intrinsically stretchable TENGs with stable performance under deformation remains a major challenge,particularly in forming robust dielectric/electrode interfaces and fabricating fully stretchable materials.Here,we propose the intrinsically stretchable ionogel-based TENGs(S-iTENG)with a monolithic structure by directly coating silver nanowires(AgNWs)onto free-standing ionogel.The ionogel serves as the substrate,charge-generating,and trapping layer,simplifying device configuration.Its hydrophilic characteristics improve the wettability of AgNWs and their interfacial adhesion.The optimized S-iTENG exhibits a power density of~109.8 mW·m^(-2),excellent stretchability(~195%),and stable operation even under 80%strain.The practical feasibility of the S-iTENG is demonstrated in self-powered sensory platforms.Overall,these results highlight the significance of monolithic,substrate-free S-iTENG as wearable energy harvesters and key components for future wearable electronics.展开更多
In energy constrained application scenarios, self‐powered systems (SPSs) are gradually emerging as a core technological pathway for enabling distributed intelligent sensing. High‐entropy energy, such as micro‐wind,...In energy constrained application scenarios, self‐powered systems (SPSs) are gradually emerging as a core technological pathway for enabling distributed intelligent sensing. High‐entropy energy, such as micro‐wind, vibrations, water motion, and human activity, is widely available but difficult to harness due to its low density, randomness, and spatiotemporal fragmentation. Triboelectric nanogenerators (TENGs), with high efficiency to low‐frequency and irregular mechanical stimuli, offer a promising solution for efficient energy harvesting, driving the advancement of SPSs with high‐entropy distribution. This review outlines the basic concepts and recent developments of TENG‐driven SPSs, focusing on strategies for energy harvesting, power management, and system integration. It highlights structural optimization and performance enhancement under typical highentropy scenarios and analyzes key challenges in energy conversion, power regulation, and load management. Finally, the potential applications of TENG‐driven SPSs are discussed in emerging smart fields such as infrastructure monitoring, lowaltitude economy, mobile intelligent devices, and ocean sensing networks.展开更多
Flexible and wearable electronics are attracting surging attention due to their potential applications in human health monitoring and precision therapies.Safety hazards including strong magnetic field and electric lea...Flexible and wearable electronics are attracting surging attention due to their potential applications in human health monitoring and precision therapies.Safety hazards including strong magnetic field and electric leakage are big risk factors for human health.It remains challenging to develop self‐powered and wearable safety hazard sensors that could not only be able to monitor human motions but also have functions for detecting potential hazards.In this work,we fabricated a self‐powered,shapeable,and wearable magnetic triboelectric nanogenerator(MTENG)based on ferrofluid,Ecoflex,and carbonized silk fabric that possessed effective hazard prevention and biomechanical motion sensing ability.A peak open‐circuit voltage of 0.7 V and short‐circuit current of 10μA m^(−2)can be achieved when magnetic field is changed between 3.5 and 37.1 mT.As a component of triboelectric layer of the MTENG,ferrofluid can substantially extend the range of its sensing capabilities to many hazardous cues such as dangerous magnetic field.Furtherly,the developed multifunctional and self‐powered sensor can be used to monitor human activities such as drinking water and bending finger.This effort opens up a new design opportunity for hazard avoidance wearable electronics and self‐powered sensors.展开更多
Theα-Ga2 O_(3)nanorod array is grown on FTO by hydrothermal and annealing processes.And a self-powered PEDOT:PSS/α-Ga_(2)O_(3)nanorod array/FTO(PGF)photodetector has been demonstrated by spin coating PEDOT:PSS on th...Theα-Ga2 O_(3)nanorod array is grown on FTO by hydrothermal and annealing processes.And a self-powered PEDOT:PSS/α-Ga_(2)O_(3)nanorod array/FTO(PGF)photodetector has been demonstrated by spin coating PEDOT:PSS on theα-Ga_(2)O_(3)nanorod array.Successfully,the PGF photodetector shows solar-blind UV/visible dual-band photodetection.Our device possesses comparable solar-blind UV responsivity(0.18 mA/W at 235 nm)and much faster response speed(0.102 s)than most of the reported self-poweredα-Ga_(2)O_(3)nanorod array solar-blind UV photodetectors.And it presents the featured and distinguished visible band photoresponse with a response speed of 0.136 s at 540 nm.The response time is also much faster than the other non-self-poweredβ-Ga_(2)O_(3)DUV/visible dual-band photodetectors due to the fast-speed separation of photogenerated carries by the built-in electric field in the depletion regions of PEDOT:PSS/α-Ga_(2)O_(3)heterojunction.The results herein may prove a promising way to realize fast-speed self-poweredα-Ga_(2)O_(3)photodetectors with solar-blind UV/visible dual-band photodetection by simple processes for the applications of multiple-target tracking,imaging,machine vision and communication.展开更多
Atopic dermatitis is a chronic inflammatory skin condition that typically manifests in infancy and is characterized by dry,irritated skin.Here,we propose a self-powered hydration-monitoring and drug-delivery skin patc...Atopic dermatitis is a chronic inflammatory skin condition that typically manifests in infancy and is characterized by dry,irritated skin.Here,we propose a self-powered hydration-monitoring and drug-delivery skin patch for closed-loop treatment of atopic dermatitis.The patch is composed of piezoelectric generator,hydration sensing unit,microneedle treatment module and flexible circuit.The piezoelectric PZT generator can achieve self-powering by harvesting mechanical energy from patient activities,allowing for long-term work of the system without external power sources.The hydration sensing unit can rapidly and accurately detect changes in skin hydration by estimating the thermal conductivity.Upon detecting abnormal skin hydration levels for 65 s,the treatment module is automatically activated,heating hyaluronic acid-based microneedles(~42℃)to release dexamethasone sodium phosphate(DEX),thereby providing timely targeted therapy and moisturization to the affected area within minutes.Therapeutic results in mice model of atopic dermatitis demonstrate that our patch can effectively treat this skin disease,improving the epidermal thickness,IL-4,spleen size and mass.The system achieves closed-loop detection and treatment of atopic dermatitis without external intervention,offering a novel approach to managing skin disease and expanding the scope of selfpowered biomedical engineering systems.展开更多
1|Background The innovation of triboelectric nanogenerators and their application in self‐powered sensors[1-3]provides a new strat-egy for sensor development.Such a development is becoming an important part of IoT as...1|Background The innovation of triboelectric nanogenerators and their application in self‐powered sensors[1-3]provides a new strat-egy for sensor development.Such a development is becoming an important part of IoT as a large number of sensors are needed to sense different things and communicate over net-works.Among the sensors,triboelectric nanogenerator(TENG)based sensors are attracting rising attention during the last 10 years.A unique feature of the TENG sensors is the self‐powering,which eliminates the need for batteries that are normally required of other types of sensors.In the early years of TENG sensors,researchers focused on the sensors'feasibility,flexibility,and sensitivity[4-7].Lately,TENG sensing systems[8,9]have been developed to obtain information from different places and times,which provides more data to be analyzed to describe a specific scenario.Moreover,the data could be communicated over a cloud.展开更多
Photonic synapses combining photosensitivity and synaptic function can efficiently perceive and memorize visual information,making them crucial for the development of artificial vision systems.However,the development ...Photonic synapses combining photosensitivity and synaptic function can efficiently perceive and memorize visual information,making them crucial for the development of artificial vision systems.However,the development of high-performance photonic synapses with low power consumption and rapid optical erasing ability remains challenging.Here,we propose a photon-modulated charging/discharging mechanism for self-powered photonic synapses.The current hysteresis enables the devices based on CsPbBr3/solvent/carbon nitride multilayer architecture to emulate synaptic behaviors,such as excitatory postsynaptic currents,paired-pulse facilitation,and long/short-term memory.Intriguingly,the unique radiation direction-dependent photocurrent endows the photonic synapses with the capability of optical writing and rapid optical erasing.Moreover,the photonic synapses exhibit exceptional performance in contrast enhancement and noise reduction owing to the notable synaptic plasticity.In simulations based on artificial neural network(ANN)algorithms,the pre-processing by our photonic synapses improves the recognition rate of handwritten digit from 11.4%(200 training epochs)to 85%(~60 training epochs).Furthermore,due to the excellent feature extraction and memory capability,an array based on the photonic synapses can imitate facial recognition of human retina without the assistance of ANN.展开更多
X-ray detectors which convert X-ray irradiation into electrical signals play an important role in diverse applications including medical diagnosis,security examination,nondestructive inspection,personal X-ray dosimete...X-ray detectors which convert X-ray irradiation into electrical signals play an important role in diverse applications including medical diagnosis,security examination,nondestructive inspection,personal X-ray dosimeters and fundamental research[1–5].Recently,metal halide perovskites(MHP)have been developed as a promising family for X-ray detection contributing to their intrinsic advantages,e.g.,simple synthesis,efficient X-ray absorption and excellent semiconducting properties[5–10].展开更多
Triboelectricity-driven acoustic transducers with various merits have demonstrated significant potential in energy harvesting and self-powered sensing.The transducers generally require additionally a spacer and a corr...Triboelectricity-driven acoustic transducers with various merits have demonstrated significant potential in energy harvesting and self-powered sensing.The transducers generally require additionally a spacer and a corresponding exquisite process for smooth operation,which provides an unnecessary interface between the elements.The exploration of a novel manufacturing approach for triboelectricity-driven acoustic transducers is warranted to resolve this issue.Here,Triboelectricitydriven Oscillating Nano-Electricity generator(TONE)developed via mechanically guided fourdimensional(4D)printing is introduced for acoustic energy harvesting and self-powered voice recognition.The mechanically buckled structure of the TONE facilitates its smooth oscillation by sound wave without the use of an additional spacer,enabling the TONE to exhibit outputs of 156 V and 10μA.The output characteristics of the TONE are analyzed based on the acoustic-structuraltriboelectric interaction mechanism.The TONE demonstrates practical versatility by providing power to commercial electronics from controlled/daily sound and being utilized in artificial intelligence-based human voice recognition sensors.展开更多
The Steel Catenary Riser(SCR)is a vital component for transporting oil and gas from the seabed to the floating platform.The harsh environmental conditions and complex platform motion make the SCR’s girth-weld prone t...The Steel Catenary Riser(SCR)is a vital component for transporting oil and gas from the seabed to the floating platform.The harsh environmental conditions and complex platform motion make the SCR’s girth-weld prone to fatigue failure.The structural stress fatigue theory and Master S-N curve method provide accurate predictions for the fatigue damage on the welded joints,which demonstrate significant potential and compatibility in multi-axial and random fatigue evaluation.Here,we propose a new frequency fatigue model subjected to welded joints of SCR under multiaxial stress,which fully integrates the mesh-insensitive structural stress and frequency domain random process and transforms the conventional welding fatigue technique of SCR into a spectrum analysis technique utilizing structural stress.Besides,a full-scale FE model of SCR with welds is established to obtain the modal structural stress of the girth weld and the frequency response function(FRF)of modal coordinate,and a biaxial fatigue evaluation about the girth weld of the SCR can be achieved by taking the effects of multi-load correlation and pipe-soil interaction into account.The research results indicate that the frequency-domain fatigue results are aligned with the time-domain results,meeting the fatigue evaluation requirements of the SCR.展开更多
Facial masks are often used to treat skin problems,and the introduction of microcurrent ion penetration technology can improve drug penetration and help facial tissue repair.However,most microcurrent stimulation masks...Facial masks are often used to treat skin problems,and the introduction of microcurrent ion penetration technology can improve drug penetration and help facial tissue repair.However,most microcurrent stimulation masks contain a direct current power supply and require external power sources,resulting in inconvenient portability and use.Herein,we provide a noninvasive self-powered iontophoresis mask with a water-driven power supply,which is continuously prepared by self-constructing equipment to continually construct a zinc-manganese fiber battery(Zn-Mn@FB)and then seamlessly integrated with a nonwoven cellulose-based superabsorbent fiber substrate.The mask can be activated by water and is simple and portable to use.Zn-Mn@FB demonstrated a capacitance retention of 65.22%(1,000 cycles)and a specific discharge capacity of 27.33 mAh/g(10 cm),which improved with an increase in battery length to up to 41 mAh/g(30 cm).The iontophoresis mask exhibited a stable current within the safe range of 0.09 to 0.59 mA(within 800 s)after water activation,and the drug penetration area increased by 102.64%.The platform is expected to become a practical device for enhanced transdermal drug delivery in the medical field,with the potential to integrate additional components for expanded functionality and productization in the future.展开更多
Organic thermoelectric(OTE)materials have been considered to be promising candidates for large area and low‐cost wearable devices owing to their tailorable molecular structure,intrinsic flexibility,and prominent solu...Organic thermoelectric(OTE)materials have been considered to be promising candidates for large area and low‐cost wearable devices owing to their tailorable molecular structure,intrinsic flexibility,and prominent solution processability.More importantly,OTE materials offer direct energy conversion from the human body,solid‐state cooling at low electric consumption,and diversified functions.Herein,we summarize recent developments of OTE materials and devices for smart applications.We first review the fundamentals of OTE materials from the viewpoint of thermoelectric performance,mechanical properties and bionic functions.Second,we describe OTE devices in flexible generators,photothermoelectric detectors,self‐powered sensors,and ultra‐thin cooling elements.Finally,we present the challenges and perspectives on OTE materials as well as devices in wearable electronics and fascinating applications in the Internet of Things.展开更多
文摘Yongtao Yu,Yuelin Yu et al.Solvent-Resistant Wearable Triboelectric Nanogenerator for Energy-Harvesting and Self-Powered Sensors.Energy Environ.Mater.2024,7,e12700.On page 4 of this article,the first paragraph of 2.4,line 14(PDF version,same below),there is a spelling mistake of“sui,”.It should be changed to“suitable”.The denominator“dt”in the Equation(3)should be changed to“dt”.
基金supported by the Nano&Material Technology Development Program through the National Research Foundation of Korea(NRF),funded by the Ministry of Science and ICT(No.RS-2025-02221332)supported by the Nano&Material Technology Development Program through the National Research Foundation of Korea(NRF)funded by the Ministry of Science and ICT(RS-2023-00283244).
文摘Stretchable triboelectric nanogenerators(TENGs)have garnered significant attention as wearable power sources by enabling the realization of self-powered systems through integration with other wearable platforms.However,achieving intrinsically stretchable TENGs with stable performance under deformation remains a major challenge,particularly in forming robust dielectric/electrode interfaces and fabricating fully stretchable materials.Here,we propose the intrinsically stretchable ionogel-based TENGs(S-iTENG)with a monolithic structure by directly coating silver nanowires(AgNWs)onto free-standing ionogel.The ionogel serves as the substrate,charge-generating,and trapping layer,simplifying device configuration.Its hydrophilic characteristics improve the wettability of AgNWs and their interfacial adhesion.The optimized S-iTENG exhibits a power density of~109.8 mW·m^(-2),excellent stretchability(~195%),and stable operation even under 80%strain.The practical feasibility of the S-iTENG is demonstrated in self-powered sensory platforms.Overall,these results highlight the significance of monolithic,substrate-free S-iTENG as wearable energy harvesters and key components for future wearable electronics.
基金supported by The National Key Research and Development Program of China(Grant No.2023YFB2604600).
文摘In energy constrained application scenarios, self‐powered systems (SPSs) are gradually emerging as a core technological pathway for enabling distributed intelligent sensing. High‐entropy energy, such as micro‐wind, vibrations, water motion, and human activity, is widely available but difficult to harness due to its low density, randomness, and spatiotemporal fragmentation. Triboelectric nanogenerators (TENGs), with high efficiency to low‐frequency and irregular mechanical stimuli, offer a promising solution for efficient energy harvesting, driving the advancement of SPSs with high‐entropy distribution. This review outlines the basic concepts and recent developments of TENG‐driven SPSs, focusing on strategies for energy harvesting, power management, and system integration. It highlights structural optimization and performance enhancement under typical highentropy scenarios and analyzes key challenges in energy conversion, power regulation, and load management. Finally, the potential applications of TENG‐driven SPSs are discussed in emerging smart fields such as infrastructure monitoring, lowaltitude economy, mobile intelligent devices, and ocean sensing networks.
基金financially supported by the National Natural Science Foundation of China(No.52125201)Beijing Natural Science Foundation(No.Z240025)and the Beijing Municipal Science and Technology(No.Z221100002722015).
文摘Flexible and wearable electronics are attracting surging attention due to their potential applications in human health monitoring and precision therapies.Safety hazards including strong magnetic field and electric leakage are big risk factors for human health.It remains challenging to develop self‐powered and wearable safety hazard sensors that could not only be able to monitor human motions but also have functions for detecting potential hazards.In this work,we fabricated a self‐powered,shapeable,and wearable magnetic triboelectric nanogenerator(MTENG)based on ferrofluid,Ecoflex,and carbonized silk fabric that possessed effective hazard prevention and biomechanical motion sensing ability.A peak open‐circuit voltage of 0.7 V and short‐circuit current of 10μA m^(−2)can be achieved when magnetic field is changed between 3.5 and 37.1 mT.As a component of triboelectric layer of the MTENG,ferrofluid can substantially extend the range of its sensing capabilities to many hazardous cues such as dangerous magnetic field.Furtherly,the developed multifunctional and self‐powered sensor can be used to monitor human activities such as drinking water and bending finger.This effort opens up a new design opportunity for hazard avoidance wearable electronics and self‐powered sensors.
基金Project supported by the National Natural Science Foundation of China(Grant No.61705155)。
文摘Theα-Ga2 O_(3)nanorod array is grown on FTO by hydrothermal and annealing processes.And a self-powered PEDOT:PSS/α-Ga_(2)O_(3)nanorod array/FTO(PGF)photodetector has been demonstrated by spin coating PEDOT:PSS on theα-Ga_(2)O_(3)nanorod array.Successfully,the PGF photodetector shows solar-blind UV/visible dual-band photodetection.Our device possesses comparable solar-blind UV responsivity(0.18 mA/W at 235 nm)and much faster response speed(0.102 s)than most of the reported self-poweredα-Ga_(2)O_(3)nanorod array solar-blind UV photodetectors.And it presents the featured and distinguished visible band photoresponse with a response speed of 0.136 s at 540 nm.The response time is also much faster than the other non-self-poweredβ-Ga_(2)O_(3)DUV/visible dual-band photodetectors due to the fast-speed separation of photogenerated carries by the built-in electric field in the depletion regions of PEDOT:PSS/α-Ga_(2)O_(3)heterojunction.The results herein may prove a promising way to realize fast-speed self-poweredα-Ga_(2)O_(3)photodetectors with solar-blind UV/visible dual-band photodetection by simple processes for the applications of multiple-target tracking,imaging,machine vision and communication.
基金supported by the National Natural Science Foundation of China(11674048 and 81703070)Health Commission of Sichuan Province(2024-803)+3 种基金Beijing Xisike Clinical Oncology Research Foundation(Y-XD202001-0024)Sichuan Science and Technology Program(2023YFS0103,2024NSFSC0143 and 2024YFFK0333)Radiation Oncology Key Laboratory of Sichuan Province Open Fund(2024ROKF06 and 2023ROKF03)Chengdu Technology Bureau(2024-YF05-02230-SN)。
文摘Atopic dermatitis is a chronic inflammatory skin condition that typically manifests in infancy and is characterized by dry,irritated skin.Here,we propose a self-powered hydration-monitoring and drug-delivery skin patch for closed-loop treatment of atopic dermatitis.The patch is composed of piezoelectric generator,hydration sensing unit,microneedle treatment module and flexible circuit.The piezoelectric PZT generator can achieve self-powering by harvesting mechanical energy from patient activities,allowing for long-term work of the system without external power sources.The hydration sensing unit can rapidly and accurately detect changes in skin hydration by estimating the thermal conductivity.Upon detecting abnormal skin hydration levels for 65 s,the treatment module is automatically activated,heating hyaluronic acid-based microneedles(~42℃)to release dexamethasone sodium phosphate(DEX),thereby providing timely targeted therapy and moisturization to the affected area within minutes.Therapeutic results in mice model of atopic dermatitis demonstrate that our patch can effectively treat this skin disease,improving the epidermal thickness,IL-4,spleen size and mass.The system achieves closed-loop detection and treatment of atopic dermatitis without external intervention,offering a novel approach to managing skin disease and expanding the scope of selfpowered biomedical engineering systems.
基金supported by the Swedish Research Council,Stiftelsen Promobilia and the Knowledge Foundation of Sweden.
文摘1|Background The innovation of triboelectric nanogenerators and their application in self‐powered sensors[1-3]provides a new strat-egy for sensor development.Such a development is becoming an important part of IoT as a large number of sensors are needed to sense different things and communicate over net-works.Among the sensors,triboelectric nanogenerator(TENG)based sensors are attracting rising attention during the last 10 years.A unique feature of the TENG sensors is the self‐powering,which eliminates the need for batteries that are normally required of other types of sensors.In the early years of TENG sensors,researchers focused on the sensors'feasibility,flexibility,and sensitivity[4-7].Lately,TENG sensing systems[8,9]have been developed to obtain information from different places and times,which provides more data to be analyzed to describe a specific scenario.Moreover,the data could be communicated over a cloud.
基金supported by the Natural Science Foundation of Shandong Province(ZR2021YQ32)the China Postdoctoral Science Foundation(2023M740472)+2 种基金the National Natural Science Foundation of China(62175162,62205214,and 61901222)the Taishan Scholars Program of Shandong Province(tsqn201909117)the Special Fund for Science and Technology Innovation Teams of Shanxi Province and Foundation of Shenzhen Science and Technology(20200814100534001).
文摘Photonic synapses combining photosensitivity and synaptic function can efficiently perceive and memorize visual information,making them crucial for the development of artificial vision systems.However,the development of high-performance photonic synapses with low power consumption and rapid optical erasing ability remains challenging.Here,we propose a photon-modulated charging/discharging mechanism for self-powered photonic synapses.The current hysteresis enables the devices based on CsPbBr3/solvent/carbon nitride multilayer architecture to emulate synaptic behaviors,such as excitatory postsynaptic currents,paired-pulse facilitation,and long/short-term memory.Intriguingly,the unique radiation direction-dependent photocurrent endows the photonic synapses with the capability of optical writing and rapid optical erasing.Moreover,the photonic synapses exhibit exceptional performance in contrast enhancement and noise reduction owing to the notable synaptic plasticity.In simulations based on artificial neural network(ANN)algorithms,the pre-processing by our photonic synapses improves the recognition rate of handwritten digit from 11.4%(200 training epochs)to 85%(~60 training epochs).Furthermore,due to the excellent feature extraction and memory capability,an array based on the photonic synapses can imitate facial recognition of human retina without the assistance of ANN.
基金supported by the National Natural Science Foundation of China(22435005,22193042,21921001,22125110,22122507,22201284,22305105,U21A2069)the Natural Science Foundation of Jiangxi Province(20224BAB213003,2024BAB25129)the Jiangxi Provincial Education Department Science and Technology Research Foundation(GJJ2200384).
文摘X-ray detectors which convert X-ray irradiation into electrical signals play an important role in diverse applications including medical diagnosis,security examination,nondestructive inspection,personal X-ray dosimeters and fundamental research[1–5].Recently,metal halide perovskites(MHP)have been developed as a promising family for X-ray detection contributing to their intrinsic advantages,e.g.,simple synthesis,efficient X-ray absorption and excellent semiconducting properties[5–10].
基金supported by the National Research Foundation of Korea(NRF)grant funded by the Korea government(MSIT)(No.RS-2024-00344920)supported by the Human Resources Development of the Korea Institute of Energy Technology Evaluation and Planning(KETEP)grant funded by the Ministry of Trade,Industry and Energy of Korea(No.RS-2023-00244330)。
文摘Triboelectricity-driven acoustic transducers with various merits have demonstrated significant potential in energy harvesting and self-powered sensing.The transducers generally require additionally a spacer and a corresponding exquisite process for smooth operation,which provides an unnecessary interface between the elements.The exploration of a novel manufacturing approach for triboelectricity-driven acoustic transducers is warranted to resolve this issue.Here,Triboelectricitydriven Oscillating Nano-Electricity generator(TONE)developed via mechanically guided fourdimensional(4D)printing is introduced for acoustic energy harvesting and self-powered voice recognition.The mechanically buckled structure of the TONE facilitates its smooth oscillation by sound wave without the use of an additional spacer,enabling the TONE to exhibit outputs of 156 V and 10μA.The output characteristics of the TONE are analyzed based on the acoustic-structuraltriboelectric interaction mechanism.The TONE demonstrates practical versatility by providing power to commercial electronics from controlled/daily sound and being utilized in artificial intelligence-based human voice recognition sensors.
基金financially supported by the Director Fund of National Energy Deepwater Oil and Gas Engineering Technology Research and Development Center(Grant No.KJQZ-2024-2103)。
文摘The Steel Catenary Riser(SCR)is a vital component for transporting oil and gas from the seabed to the floating platform.The harsh environmental conditions and complex platform motion make the SCR’s girth-weld prone to fatigue failure.The structural stress fatigue theory and Master S-N curve method provide accurate predictions for the fatigue damage on the welded joints,which demonstrate significant potential and compatibility in multi-axial and random fatigue evaluation.Here,we propose a new frequency fatigue model subjected to welded joints of SCR under multiaxial stress,which fully integrates the mesh-insensitive structural stress and frequency domain random process and transforms the conventional welding fatigue technique of SCR into a spectrum analysis technique utilizing structural stress.Besides,a full-scale FE model of SCR with welds is established to obtain the modal structural stress of the girth weld and the frequency response function(FRF)of modal coordinate,and a biaxial fatigue evaluation about the girth weld of the SCR can be achieved by taking the effects of multi-load correlation and pipe-soil interaction into account.The research results indicate that the frequency-domain fatigue results are aligned with the time-domain results,meeting the fatigue evaluation requirements of the SCR.
基金supported by the National Key Research and Development Program(2022YFB3805802)the National Natural Science Foundation of China(52473307,22208178,and 62301290)+7 种基金the Taishan Scholar Program of Shandong Province in China(tsqn202211116)the Shandong Provincial Universities Youth Innovation Technology Plan Team(2023KJ223)the Natural Science Foundation of Shandong Province of China(ZR2023YQ037,ZR2020QE074,ZR2023QE043,and ZR2022QE174)the Shandong Province Science and Technology Small and Medium sized Enterprise Innovation Ability Enhancement Project(2023TSGC0344 and 2023TSGC1006)the Natural Science Foundation of Qingdao(23-2-1-249-zyyd-jch and 24-4-4-zrjj-56-jch)the Anhui Province Postdoctoral Researcher Research Activity Funding Project(2023B706)the Qingdao Key Technology Research and Industrialization Demonstration Projects(23-1-7-zdfn-2-hz)the Suqian Key Research and Development Plan(H202310).
文摘Facial masks are often used to treat skin problems,and the introduction of microcurrent ion penetration technology can improve drug penetration and help facial tissue repair.However,most microcurrent stimulation masks contain a direct current power supply and require external power sources,resulting in inconvenient portability and use.Herein,we provide a noninvasive self-powered iontophoresis mask with a water-driven power supply,which is continuously prepared by self-constructing equipment to continually construct a zinc-manganese fiber battery(Zn-Mn@FB)and then seamlessly integrated with a nonwoven cellulose-based superabsorbent fiber substrate.The mask can be activated by water and is simple and portable to use.Zn-Mn@FB demonstrated a capacitance retention of 65.22%(1,000 cycles)and a specific discharge capacity of 27.33 mAh/g(10 cm),which improved with an increase in battery length to up to 41 mAh/g(30 cm).The iontophoresis mask exhibited a stable current within the safe range of 0.09 to 0.59 mA(within 800 s)after water activation,and the drug penetration area increased by 102.64%.The platform is expected to become a practical device for enhanced transdermal drug delivery in the medical field,with the potential to integrate additional components for expanded functionality and productization in the future.
基金supported by the National Key Research and Development Program of China(2017YFA0204700 and 2018YFE0200700)the National Natural Science Foundation of China(21805285,22021002,21905276,61971396)+2 种基金the Natural Science Foundation of Beijing(4202077)Beijing National Laboratory for Molecular Sciences(BNLMS201912)UCAS(Y954011XX2)and CAS(ZDBS‐LY‐SLH034).
文摘Organic thermoelectric(OTE)materials have been considered to be promising candidates for large area and low‐cost wearable devices owing to their tailorable molecular structure,intrinsic flexibility,and prominent solution processability.More importantly,OTE materials offer direct energy conversion from the human body,solid‐state cooling at low electric consumption,and diversified functions.Herein,we summarize recent developments of OTE materials and devices for smart applications.We first review the fundamentals of OTE materials from the viewpoint of thermoelectric performance,mechanical properties and bionic functions.Second,we describe OTE devices in flexible generators,photothermoelectric detectors,self‐powered sensors,and ultra‐thin cooling elements.Finally,we present the challenges and perspectives on OTE materials as well as devices in wearable electronics and fascinating applications in the Internet of Things.
