期刊文献+
共找到161篇文章
< 1 2 9 >
每页显示 20 50 100
Biodegradable, Super-Strong, and Conductive Cellulose Macrofibers for Fabric-Based Triboelectric Nanogenerator 被引量:16
1
作者 Sanming Hu Jing Han +8 位作者 Zhijun Shi Kun Chen Nuo Xu Yifei Wang Ruizhu Zheng Yongzhen Tao Qijun Sun Zhong Lin Wang Guang Yang 《Nano-Micro Letters》 SCIE EI CAS CSCD 2022年第7期157-176,共20页
Electronic fibers used to fabricate wearable triboelectric nanogenerator(TENG) for harvesting human mechanical energy have been extensively explored. However, little attention is paid to their mutual advantages of env... Electronic fibers used to fabricate wearable triboelectric nanogenerator(TENG) for harvesting human mechanical energy have been extensively explored. However, little attention is paid to their mutual advantages of environmental friendliness, mechanical properties, and stability. Here, we report a super-strong, biodegradable, and washable cellulose-based conductive macrofibers, which is prepared by wet-stretching and wet-twisting bacterial cellulose hydrogel incorporated with carbon nanotubes and polypyrrole. The cellulose-based conductive macrofibers possess high tensile strength of 449 MPa(able to lift 2 kg weights), good electrical conductivity(~ 5.32 S cm^(-1)), and excellent stability(Tensile strength and conductivity only decrease by 6.7% and 8.1% after immersing in water for 1 day). The degradation experiment demonstrates macrofibers can be degraded within 108 h in the cellulase solution. The designed fabric-based TENG from the cellulose-base conductive macrofibers shows a maximum open-circuit voltage of 170 V, short-circuit current of 0.8 μA, and output power at 352 μW, which is capable of powering the commercial electronics by charging the capacitors. More importantly, the fabric-based TENGs can be attached to the human body and work as self-powered sensors to effectively monitor human motions. This study suggests the potential of biodegradable, super-strong, and washable conductive cellulose-based fiber for designing eco-friendly fabric-based TENG for energy harvesting and biomechanical monitoring. 展开更多
关键词 BIODEGRADABLE Conductive macrofiber Fabric-based TENG Energy harvesting Self-powered sensors
在线阅读 下载PDF
Differences and Similarities of Photocatalysis and Electrocatalysis in Two-Dimensional Nanomaterials:Strategies,Traps,Applications and Challenges 被引量:12
2
作者 Weiqi Qian Suwen Xu +4 位作者 Xiaoming Zhang Chuanbo Li Weiyou Yang Chris RBowen Ya Yang 《Nano-Micro Letters》 SCIE EI CAS CSCD 2021年第10期214-251,共38页
Photocatalysis and electrocatalysis have been essential parts of electrochemical processes for over half a century.Recent progress in the controllable synthesis of 2D nanomaterials has exhibited enhanced catalytic per... Photocatalysis and electrocatalysis have been essential parts of electrochemical processes for over half a century.Recent progress in the controllable synthesis of 2D nanomaterials has exhibited enhanced catalytic performance compared to bulk materials.This has led to significant interest in the exploitation of 2D nanomaterials for catalysis.There have been a variety of excellent reviews on 2D nanomaterials for catalysis,but related issues of differences and similarities between photocatalysis and electrocatalysis in 2D nanomaterials are still vacant.Here,we provide a comprehensive overview on the differences and similarities of photocatalysis and electrocatalysis in the latest 2D nanomaterials.Strategies and traps for performance enhancement of 2D nanocatalysts are highlighted,which point out the differences and similarities of series issues for photocatalysis and electrocatalysis.In addition,2D nanocatalysts and their catalytic applications are discussed.Finally,opportunities,challenges and development directions for 2D nanocatalysts are described.The intention of this review is to inspire and direct interest in this research realm for the creation of future 2D nanomaterials for photocatalysis and electrocatalysis. 展开更多
关键词 2D nanomaterials PHOTOCATALYSIS ELECTROCATALYSIS Electrochemistry PHOTOELECTROCHEMISTRY
在线阅读 下载PDF
Structure, Performance, and Application of BiFeO_(3) Nanomaterials 被引量:5
3
作者 Nan Wang Xudong Luo +4 位作者 Lu Han Zhiqiang Zhang Renyun Zhang H-kan Olin Ya Yang 《Nano-Micro Letters》 SCIE EI CAS CSCD 2020年第6期214-236,共23页
Multiferroic nanomaterials have attracted great interest due to simultaneous two or more properties such as ferroelectricity,ferromagnetism,and ferroelasticity,which can promise a broad application in multifunctional,... Multiferroic nanomaterials have attracted great interest due to simultaneous two or more properties such as ferroelectricity,ferromagnetism,and ferroelasticity,which can promise a broad application in multifunctional,lowpower consumption,environmentally friendly devices.Bismuth ferrite(BiFeO3,BFO)exhibits both(anti)ferromagnetic and ferroelectric properties at room temperature.Thus,it has played an increasingly important role in multiferroic system.In this review,we systematically discussed the developments of BFO nanomaterials including morphology,structures,properties,and potential applications in multiferroic devices with novel functions.Even the opportunities and challenges were all analyzed and summarized.We hope this review can act as an updating and encourage more researchers to push on the development of BFO nanomaterials in the future. 展开更多
关键词 BISMUTH ferrite MULTIFERROIC NANOMATERIALS Multifunctional device FERROELECTRICITY MAGNETOELECTRIC coupling
在线阅读 下载PDF
Coupling Enhancement of a Flexible BiFeO_(3) Film-Based Nanogenerator for Simultaneously Scavenging Light and Vibration Energies 被引量:2
4
作者 Xiao Han Yun Ji +3 位作者 Li Wu Yanlong Xia Chris RBowen Ya Yang 《Nano-Micro Letters》 SCIE EI CAS CSCD 2022年第12期137-150,共14页
Coupled nanogenerators have been a research hotspot due to their ability to harvest a variety of forms of energy such as light,mechanical and thermal energy and achieve a stable direct current output.Ferroelectric fil... Coupled nanogenerators have been a research hotspot due to their ability to harvest a variety of forms of energy such as light,mechanical and thermal energy and achieve a stable direct current output.Ferroelectric films are frequently investigated for photovoltaic applications due to their unique photovoltaic properties and bandgap-independent photovoltage,while the flexoelectric effect is an electromechanical property commonly found in solid dielectrics.Here,we effectively construct a new form of coupled nanogenerator based on a flexible BiFeO_(3) ferroelectric film that combines both flexoelectric and photovoltaic effects to successfully harvest both light and vibration energies.This device converts an alternating current into a direct current and achieves a 6.2% charge enhancement and a 19.3%energy enhancement to achieve a multi-dimensional"1+1>2"coupling enhancement in terms of current,charge and energy.This work proposes a new approach to the coupling of multiple energy harvesting mechanisms in ferroelectric nanogenerators and provides a new strategy to enhance the transduction efficiency of flexible functional devices. 展开更多
关键词 Ferroelectric film Coupled nanogenerators Photovoltaic effect Flexoelectric effect Energy collection
在线阅读 下载PDF
Ultra-Robust and High-Performance Rotational Triboelectric Nanogenerator by Bearing Charge Pumping 被引量:2
5
作者 Xianpeng Fu Yuhan Qin +6 位作者 Zhi Zhang Guoxu Liu Jie Cao Beibei Fan Zhaozheng Wang Zheng Wang Chi Zhang 《Energy & Environmental Materials》 SCIE EI CAS CSCD 2024年第2期343-349,共7页
As an emerging technology to convert environmental high-entropy energy into electrical energy,triboelectric nanogenerator(TENG)has great demands for further enhancing the service lifetime and output performance in pra... As an emerging technology to convert environmental high-entropy energy into electrical energy,triboelectric nanogenerator(TENG)has great demands for further enhancing the service lifetime and output performance in practical applications.Here,an ultra-robust and high-performance rotational triboelectric nanogenerator(R-TENG)by bearing charge pumping is proposed.The R-TENG composes of a pumping TENG(P-TENG),an output TENG(O-TENG),a voltage-multiplying circuit(VMC),and a buffer capacitor.The P-TENG is designed with freestanding mode based on a rolling ball bearing,which can also act as the rotating mechanical energy harvester.The output low charge from the P-TENG is accumulated and pumped to the non-contact O-TENG,which can simultaneously realize ultralow mechanical wear and high output performance.The matched instantaneous power of R-TENG is increased by 32 times under 300 r/min.Furthermore,the transferring charge of R-TENG can remain 95%during 15 days(6.4×10^(6)cycles)continuous operation.This work presents a realizable method to further enhance the durability of TENG,which would facilitate the practical applications of high-performance TENG in harvesting distributed ambient micro mechanical energy. 展开更多
关键词 bearing charge pumping triboelectric nanogenerators ultralow mechanical wear ultra-robust voltage-multiplying circuit
在线阅读 下载PDF
Advances in Triboelectric Nanogenerators for Blue Energy Harvesting and Marine Environmental Monitoring 被引量:1
6
作者 Yang Jiang Xi Liang +1 位作者 Tao Jiang Zhong Lin Wang 《Engineering》 SCIE EI CAS CSCD 2024年第2期204-224,共21页
Blue energy,which includes rainfall,tidal current,wave,and water-flow energy,is a promising renewable resource,although its exploitation is limited by current technologies and thus remains low.This form of energy is m... Blue energy,which includes rainfall,tidal current,wave,and water-flow energy,is a promising renewable resource,although its exploitation is limited by current technologies and thus remains low.This form of energy is mainly harvested by electromagnetic generators(EMGs),which generate electricity via Lorenz force-driven electron flows.Triboelectric nano genera tors(TENGs)and TENG networks exhibit superiority over EMGs in low-frequency and high-entropy energy harvesting as a new approach for blue energy harvesting.A TENG produces electrical outputs by adopting the mechanism of Maxwell’s displacement current.To date,a series of research efforts have been made to optimize the structure and performance of TENGs for effective blue energy harvesting and marine environmental applications.Despite the great progress that has been achieved in the use of TENGs in this context so far,continuous exploration is required in energy conversion,device durability,power management,and environmental applications.This review reports on advances in TENGs for blue energy harvesting and marine environmental monitoring.It introduces the theoretical foundations of TENGs and discusses advanced TENG prototypes for blue energy harvesting,including TENG structures that function in freestanding and contact-separation modes.Performance enhancement strategies for TENGs intended for blue energy harvesting are also summarized.Finally,marine environmental applications of TENGs based on blue energy harvesting are discussed. 展开更多
关键词 Triboelectric nanogenerator TENG networks Blue energy Energy harvesting Ocean sensors
在线阅读 下载PDF
Non-contact intelligent sensor for recognizing transparent and naked-eye indistinguishable materials based on ferroelectric BiFeO_(3)thin films
7
作者 Shengjie Yin Hongyu Li +2 位作者 Weiqi Qian Md Al Mahadi Hasan Ya Yang 《International Journal of Extreme Manufacturing》 SCIE EI CAS CSCD 2024年第5期263-271,共9页
At present,the research on ferroelectric photovoltaic materials mainly focuses on photoelectric detection.In the context of the rapid development of the Internet of Things(IoT),it is particularly important to use smal... At present,the research on ferroelectric photovoltaic materials mainly focuses on photoelectric detection.In the context of the rapid development of the Internet of Things(IoT),it is particularly important to use smaller thin-film devices as sensors.In this work,an indium tin oxide/bismuth ferrite(BFO)/lanthanum nickelate device has been fabricated on an F-doped tin oxide glass substrate using the sol–gel method.The sensor can continuously output photoelectric signals with little environmental impact.Compared to other types of sensors,this photoelectric sensor has an ultra-low response time of 1.25 ms and ultra-high sensitivity.Furthermore,a material recognition system based on a BFO sensor is developed.It can effectively identify eight kinds of materials that are difficult for human eyes to distinguish.This provides new ideas and methods for developing the IoT in material identification. 展开更多
关键词 BiFeO_(3) ferroelectric materials self-powered photodetector material recognition
在线阅读 下载PDF
A novel oxidation-resistible Mg@Ni foam material for safe,efficient,and controllable hydrogen generation
8
作者 Jingru Liu Busheng Zhang +3 位作者 Haiping Yu Tengfei Li Mingjun Hu Jun Yang 《Journal of Magnesium and Alloys》 CSCD 2024年第10期4063-4074,共12页
As a promising in-situ hydrogen generation material,magnesium(Mg)has been seeking a promotion in its hydrogen generation property.Increasing the specific surface area,for example,replacing the Mg bulk using Mg powder,... As a promising in-situ hydrogen generation material,magnesium(Mg)has been seeking a promotion in its hydrogen generation property.Increasing the specific surface area,for example,replacing the Mg bulk using Mg powder,can greatly increase the hydrogen generation property,but it brings a high explosion risk,a difficulty in controlling the hydrogen generation,and an oxidation problem.In this work,we prepare a novel Mg@Ni foam material with Mg deposits on Ni foam by a physical vapor deposition method.The Ni foam not only increases the hydrolysis reaction areas of Mg by improving its specific surface area,but also kinetically accelerates the hydrolysis reaction rate of Mg by forming a uniform Mg-Ni galvanic cell.As a result,the Mg@Ni foam material realizes a near-theoretical hydrogen generation amount of Mg and a hydrogen generation rate significantly higher than those realized by the bulk Mg-based materials.The Mg@Ni foam material with the excellent hydrogen generation property is also free from explosion risk,easy to be controlled,and resistible to oxidation.A hydrogen fuel cell powered by the hydrogen generated by the Mg@Ni foam material can yield a steady voltage and run a small car for a long distance. 展开更多
关键词 Mg@Ni foam material Physical vapor deposition Hydrogen generation
在线阅读 下载PDF
Dynamically self-adjustable liquid-liquid and self-adaptive softcontact solid-solid triboelectric nanogenerator for wave energy harvesting
9
作者 Yong Long Bingqi Zhao +5 位作者 Jianan Niu Yuxiu Liu Wei Sha Jiangwen Wang Zhong Lin Wang Weiguo Hu 《Nano Research》 SCIE EI 2025年第1期404-414,共11页
Water wave energy exhibits great potential toalleviate the global energy crisis. However, harvesting andutilizing wave energy are challenging due to its irregularity,randomness, and low frequency. Triboelectric nanoge... Water wave energy exhibits great potential toalleviate the global energy crisis. However, harvesting andutilizing wave energy are challenging due to its irregularity,randomness, and low frequency. Triboelectric nanogenerators(TENGs) have gained significant attention for harvesting waveenergy with high efficiency. This study presents a novelellipsoidal, pendulum-like TENG integrating both liquid-liquid(L-L) and solid-solid (S-S) triboelectricity (LS-TENG). Thisinnovative design enables continuous wave energy harvestingand self-powered marine environment monitoring under variousconditions, including temperature, humidity, and light intensity. The binary immiscible liquids within the LS-TENG’s innersoft balloon create dynamic, and self-adjustable L-L contact interfaces, significantly increasing the L-L contact area andenhancing L-L contact electrification (CE). The unique self-adaptive, soft S-S contact increases the S-S contact areacompared to traditional hard point contact, better adapting to the irregular movements of waves and promoting efficient S-SCE. The LS-TENG achieves highly efficient wave energy harvesting by coupling L-L and S-S CE. Furthermore, the uniquesoft contact design protects the S-S interfaces from mechanical wear and damage during long-term work. The LS-TENG’snovel structure provides an innovative and effective way for water wave energy harvesting. 展开更多
关键词 SELF-ADAPTIVE soft-contact solid-solid LIQUID-LIQUID self-adjustable triboelectric nanogenerator
原文传递
Piezopotential augmented photo-and photoelectro-catalysis with a built-in electric field 被引量:12
10
作者 Zhirong Liu Xin Yu Linlin Li 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2020年第4期534-549,共16页
Rapid technological development and population growth are responsible for a series of imminent environmental problems and an ineluctable energy crisis.The application of semiconductor nanomaterials in photocatalysis o... Rapid technological development and population growth are responsible for a series of imminent environmental problems and an ineluctable energy crisis.The application of semiconductor nanomaterials in photocatalysis or photoelectrocatalysis(PEC)for either the degradation of contaminants in the environment or the generation of hydrogen as clean fuel is an effective approach to alleviate these problems.However,the efficiency of such processes remains suboptimal for real applications.Reasonable construction of a built-in electric field is considered to efficiently enhance carrier separation and reduce carrier recombination to improve catalytic performance.In the past decade,as a new method to enhance the built-in electric field,the piezoelectric effect from piezoelectric materials has been extensively studied.In this review,we provide an overview of the properties of piezoelectric materials and the mechanisms of piezoelectricity and ferroelectricity for a built-in electric field.Then,piezoelectric and ferroelectric polarization regulated built-in electric fields that mediate catalysis are discussed.Furthermore,the applications of piezoelectric semiconductor materials are also highlighted,including degradation of pollutants,bacteria disinfection,water splitting for H2 generation,and organic synthesis.We conclude by discussing the challenges in the field and the exciting opportunities to further improve piezo-catalytic efficiency. 展开更多
关键词 PHOTOCATALYSIS PHOTOELECTROCATALYSIS Piezopotential Built-in electric field Piezo-phototronic effect Reactive oxygen species
在线阅读 下载PDF
Tribotronics: an emerging field by coupling triboelectricity and semiconductors 被引量:6
11
作者 Chi Zhang Junqing Zhao +3 位作者 Zhi Zhang Tianzhao Bu Guoxu Liu Xianpeng Fu 《International Journal of Extreme Manufacturing》 SCIE EI CAS CSCD 2023年第4期37-58,共22页
Tribotronics is an emerging research field that focuses on the coupling of triboelectricity and semiconductors.In this review,we summarise and explore three branches of tribotronics.Firstly,we introduce the tribovolta... Tribotronics is an emerging research field that focuses on the coupling of triboelectricity and semiconductors.In this review,we summarise and explore three branches of tribotronics.Firstly,we introduce the tribovoltaic effect,which involves direct-current power generation through mechanical friction on semiconductor interfaces.This effect offers significant advantages in terms of high power density compared to traditional insulator-based triboelectric nanogenerators.Secondly,we elaborate on triboelectric modulation,which utilises the triboelectric potential on field-effect transistors.This approach enables active mechanosensation and nanoscale tactile perception.Additionally,we present triboelectric management,which aims to improve energy supply efficiency using semiconductor device technology.This strategy provides an effective microenergy solution for sensors and microsystems.For the interactions between triboelectricity and semiconductors,the research of tribotronics has exhibited the electronics of interfacial friction systems,and the triboelectric technology by electronics.This review demonstrates the promising prospects of tribotronics in the development of new functional devices and self-powered microsystems for intelligent manufacturing,robotic sensing,and the industrial Internet of Things. 展开更多
关键词 triboelectric nanogenerator tribotronics tribovoltaic effect triboelectric modulation triboelectric management
在线阅读 下载PDF
Multidiscipline Applications of Triboelectric Nanogenerators for the Intelligent Era of Internet of Things 被引量:8
12
作者 Xiaole Cao Yao Xiong +3 位作者 Jia Sun Xiaoyin Xie Qijun Sun Zhong Lin Wang 《Nano-Micro Letters》 SCIE EI CAS CSCD 2023年第1期252-292,共41页
In the era of 5G and the Internet of things(IoTs),vari-ous human-computer interaction systems based on the integration of triboelectric nanogenerators(TENGs)and IoTs technologies dem-onstrate the feasibility of sustai... In the era of 5G and the Internet of things(IoTs),vari-ous human-computer interaction systems based on the integration of triboelectric nanogenerators(TENGs)and IoTs technologies dem-onstrate the feasibility of sustainable and self-powered functional systems.The rapid development of intelligent applications of IoTs based on TENGs mainly relies on supplying the harvested mechanical energy from surroundings and implementing active sensing,which have greatly changed the way of human production and daily life.This review mainly introduced the TENG applications in multidisci-pline scenarios of IoTs,including smart agriculture,smart industry,smart city,emergency monitoring,and machine learning-assisted artificial intelligence applications.The challenges and future research directions of TENG toward IoTs have also been proposed.The exten-sive developments and applications of TENG will push forward the IoTs into an energy autonomy fashion. 展开更多
关键词 Triboelectric nanogenerator Self-powered sensor Internet of things Artificial intelligence Machine learning
在线阅读 下载PDF
Recent Progress in Nanoscale Covalent Organic Frameworks for Cancer Diagnosis and Therapy 被引量:4
13
作者 Shuncheng Yao Zhirong Liu Linlin Li 《Nano-Micro Letters》 SCIE EI CAS CSCD 2021年第11期246-265,共20页
Covalent organic frameworks(COFs)as a type of porous and crystalline covalent organic polymer are built up from covalently linked and periodically arranged organic molecules.Their precise assembly,welldefined coordina... Covalent organic frameworks(COFs)as a type of porous and crystalline covalent organic polymer are built up from covalently linked and periodically arranged organic molecules.Their precise assembly,welldefined coordination network,and tunable porosity endow COFs with diverse characteristics such as low density,high crystallinity,porous structure,and large specific-surface area,as well as versatile functions and active sites that can be tuned at molecular and atomic level.These unique properties make them excellent candidate materials for biomedical applications,such as drug delivery,diagnostic imaging,and disease therapy.To realize these functions,the components,dimensions,and vip molecule loading into COFs have a great influence on their performance in various applications.In this review,we first introduce the influence of dimensions,building blocks,and synthetic conditions on the chemical stability,pore structure,and chemical interaction with vip molecules of COFs.Next,the applications of COFs in cancer diagnosis and therapy are summarized.Finally,some challenges for COFs in cancer therapy are noted and the problems to be solved in the future are proposed. 展开更多
关键词 Covalent organic frameworks NANOMEDICINE Drug delivery Cancer diagnosis and therapy
在线阅读 下载PDF
Laser-Etched Stretchable Graphene-Polymer Composite Array for Sensitive Strain and Viscosity Sensors 被引量:4
14
作者 Yuting Jiang Yang Wang +4 位作者 Heting Wu Yuanhao Wang Renyun Zhang H?kan Olin Ya Yang 《Nano-Micro Letters》 SCIE EI CAS CSCD 2019年第4期709-719,共11页
The ability to control surface wettability and liquid spreading on textured surfaces is of interest for extensive applications.Soft materials have prominent advantages for producing the smart coatings with multiple fu... The ability to control surface wettability and liquid spreading on textured surfaces is of interest for extensive applications.Soft materials have prominent advantages for producing the smart coatings with multiple functions for strain sensing.Here,we report a simple method to prepare flexible hydrophobic smart coatings using graphene-polymer films.Arrays of individual patterns in the films were created by laser engraving and controlled the contact angle of small drops by pinning the contact lines in a horizontal tensile range of 0-200%.By means of experiments and model,we demonstrate that the ductility of drops is relied on the height-to-spacing ratio of the individual pattern and the intrinsic contact angle.Moreover,the change of drop size was utilized to measure the applied strain and liquid viscosity,enabling a strain sensitivity as high as 1068μm2/%.The proposed laser-etched stretchable graphene-polymer composite has potential applications in DNA microarrays,biological assays,soft robots,and so on. 展开更多
关键词 HYDROPHOBIC smart coatings Flexible sensors Soft materials Controlled DROPS GRAPHENE
在线阅读 下载PDF
Advances in Soft Materials for Sustainable Electronics 被引量:3
15
作者 Moon Jong Han Dong Ki Yoon 《Engineering》 SCIE EI 2021年第5期564-580,共17页
In the current shift from conventional fossil-fuel-based materials to renewable energy,ecofriendly materials have attracted extensive research interest due to their sustainability and biodegradable properties.The inte... In the current shift from conventional fossil-fuel-based materials to renewable energy,ecofriendly materials have attracted extensive research interest due to their sustainability and biodegradable properties.The integration of sustainable materials in electronics provides industrial benefits from wasted bio-origin resources and preserves the environment.This review covers the use of sustainable materials as components in organic electronics,such as substrates,insulators,semiconductors,and conductors.We hope this review will stimulate interest in the potential and practical applications of sustainable materials for green and sustainable industry. 展开更多
关键词 SUSTAINABLE BIODEGRADABLE Soft materials Organic electronics
在线阅读 下载PDF
3D cellular visualization of intact mouse tooth using optical clearing without decalcification 被引量:1
16
作者 Sujung Hong Jingu Lee +3 位作者 Jin Man Kim Sun-Young Kim Hyung-Ryong Kim Pilhan Kim 《International Journal of Oral Science》 SCIE CAS CSCD 2019年第3期223-230,共8页
Dental pulp is composed of nerves,blood vessels,and various types of cells and surrounded by a thick and hard enamel-dentin matrix.Due to its importance in the maintenance of tooth vitality,there have been intensive e... Dental pulp is composed of nerves,blood vessels,and various types of cells and surrounded by a thick and hard enamel-dentin matrix.Due to its importance in the maintenance of tooth vitality,there have been intensive efforts to analyze the complex cellularlevel organization of the dental pulp in teeth.Although conventional histologic analysis has provided microscopic images of the dental pulp,3-dimensional (3D) cellular-level visualization of the whole dental pulp in an intact tooth has remained a technically challenging task.This is mainly due to the inevitable disruption and loss of microscopic structural features during the process of mechanical sectioning required for the preparation of the tooth sample for histological observation.To accomplish 3D microscopic observation of thick intact tissue,various optical clearing techniques have been developed mostly for soft tissue,and their application for hard tissues such as bone and teeth has only recently started to be investigated.In this work,we established a simple and rapid optical clearing technique for intact mouse teeth without the time-consuming process of decalcification.We achieved 3D cellular-level visualization of the microvasculature and various immune cell distributions in the whole dental pulp of mouse teeth under normal and pathologic conditions.This technique could be used to enable diverse research methods on tooth development and regeneration by providing 3D visualization of various pulpal cells in intact mouse teeth. 展开更多
关键词 blood VESSELS DENTAL PULP soft tissue
在线阅读 下载PDF
Optical second-harmonic generation of Janus MoSSe monolayer 被引量:1
17
作者 Ce Bian Jianwei Shi +3 位作者 Xinfeng Liu Yang Yang Haitao Yang Hongjun Gao 《Chinese Physics B》 SCIE EI CAS CSCD 2022年第9期488-492,共5页
The transition metal dichalcogenides(TMD)monolayers have shown strong second-harmonic generation(SHG)ow-ing to their lack of inversion symmetry.These ultrathin layers then serve as the frequency converters that can be... The transition metal dichalcogenides(TMD)monolayers have shown strong second-harmonic generation(SHG)ow-ing to their lack of inversion symmetry.These ultrathin layers then serve as the frequency converters that can be intergraded on a chip.Here,taking MoSSe as an example,we report the first detailed experimental study of the SHG of Janus TMD monolayer,in which the transition metal layer is sandwiched by the two distinct chalcogen layers.It is shown that the SHG effectively arises from an in-plane second-harmonic polarization under paraxial focusing and detection.Based on this,the orientation-resolved SHG spectroscopy is realized to readily determine the zigzag and armchair axes of the Janus crystal with an accuracy better than±0.6°.Moreover,the SHG intensity is wavelength-dependent and can be greatly enhanced(~60 times)when the two-photon transition is resonant with the C-exciton state.Our findings uncover the SHG properties of Janus MoSSe monolayer,therefore lay the basis for its integrated frequency-doubling applications. 展开更多
关键词 Janus MoSSe monolayer second-harmonic generation(SHG) orientation-resolved spectroscopy C-exciton resonance
在线阅读 下载PDF
Imaging the diffusion pathway of Al^3+ ion in NASICON-type (Al0.2Zr0.8)20/19Nb(PO4)3 as electrolyte for rechargeable solid-state Al batteries
18
作者 Jie Wang Chun-Wen Sun +1 位作者 Yu-Dong Gong Huai-Ruo Zhang 《Chinese Physics B》 SCIE EI CAS CSCD 2018年第12期532-537,共6页
Among all-solid-state batteries, rechargeable Al-ion batteries have attracted most attention because they involve threeelectron-redox reactions with high theoretic specific capacity. However, the solid Al-ion conducto... Among all-solid-state batteries, rechargeable Al-ion batteries have attracted most attention because they involve threeelectron-redox reactions with high theoretic specific capacity. However, the solid Al-ion conductor electrolytes are less studied. Here, the microscopic path of Al3+-ion conduction of NASICON-type(Al0.2Zr0.8)20/19Nb(PO4)3oxide is identified by temperature-dependent neutron powder diffraction and aberration-corrected scanning transmission electron microscopy experiments.(Al0.2Zr0.8)20/19Nb(PO4)3shows a rhombohedral structure consisting of a framework of(Zr,Nb)O6octahedra sharing corners with(PO4) tetrahedra; the Al occupy trigonal antiprisms exhibiting extremely large displacement factors. This suggests a strong displacement of Al ions along the c axis of the unit cell as they diffuse across the structure by a vacancy mechanism. Negative thermal expansion behavior is also identified along a and b axes, due to folding of the framework as temperature increases. 展开更多
关键词 aluminum–ion battery solid electrolyte diffusion pathway negative thermal expansion
在线阅读 下载PDF
Manufacture and applications of GaN-based piezotronic and piezo-phototronic devices
19
作者 Jianan Niu Jiangwen Wang +3 位作者 Wei Sha Yong Long Bei Ma Weiguo Hu 《International Journal of Extreme Manufacturing》 2025年第1期130-149,共20页
Driven by the urgent demands for information technology,energy,and intelligent industry,third-generation semiconductor GaN has emerged as a pivotal component in electronic and optoelectronic devices.Fundamentally,piez... Driven by the urgent demands for information technology,energy,and intelligent industry,third-generation semiconductor GaN has emerged as a pivotal component in electronic and optoelectronic devices.Fundamentally,piezoelectric polarization is the most essential feature of GaN materials.Incorporating piezotronics and piezo-phototronics,GaN materials synergize mechanical signals with electrical and optical signals,thereby achieving multi-field coupling that enhances device performance.Piezotronics regulates the carrier transport process in micro-nano devices,which has been proven to significantly improve the performance of devices(such as high electron mobility transistors and microLEDs)and brings many novel applications.This review examines GaN material properties and the theoretical foundations of piezotronics and phototronics.Furthermore,it delves into the fabrication and integration processes of GaN devices to achieve state-of-the-art performance.Additionally,this review analyzes the impact of introducing three-dimensional stress and regulatory forces on the electrical and optical output performance of devices.Moreover,it discusses the burgeoning applications of GaN devices in neural sensing,optoelectronic output,and energy harvesting.The potential of piezotroniccontrolled GaN devices provides valuable insights for future research and the development of multi-functional,diversified electronic devices. 展开更多
关键词 piezotronics piezo-phototronics GaN-based device manufacture
在线阅读 下载PDF
Diversified applications of triboelectric and electrostatic effect
20
作者 Lin Huang Guangzhao Huang +1 位作者 Dandan Zhang Xiangyu Chen 《Friction》 2025年第2期3-17,共15页
The application study of triboelectric and electrostatic effects,with roots tracing back hundreds of years,has continued to evolve and develop in industrial production,science,technology,and other fields.Numerous meth... The application study of triboelectric and electrostatic effects,with roots tracing back hundreds of years,has continued to evolve and develop in industrial production,science,technology,and other fields.Numerous methods have been proposed for the preparation and processing of triboelectric materials,resulting in significant advancements in their charge density and application range.This paper aims to provide a comprehensive understanding of the application progress of the triboelectric effect.It begins by summarizing the fundamental theoretical mechanism of triboelectrification.Subsequently,a detailed review of various applications related to triboelectric effect and electrostatic induction is conducted,encompassing electrostatic adsorption,electret formation,electrostatic self-assembly,triboelectric generator,self-powered sensor,and mechanical force catalysis.Furthermore,different triboelectric materials and their preparation and modification methods are also explored in accordance with different application scenarios.Finally,this paper discusses the future development prospects and challenges associated with the triboelectric effect.It also emphasizes the necessity for further research and development in specific fields,offering valuable insights for future scientific research and practical implementation. 展开更多
关键词 triboelectric effect application triboelectric materials preparation and processing
原文传递
上一页 1 2 9 下一页 到第
使用帮助 返回顶部