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| 1 | Equivalent circuit method for static and dynamic analysis of magnetoelectric laminated composites显示文摘Magnetoelectric equivalent circuit analytical method is presented for laminate composites of magneto- strictive Terfenol-D (TbxDy1-xFe2) and piezoelectric Pb(Zr1-xTix)O3 (PZT) operated in longitudinal mag- netized and transverse polarized (or L-T), and transverse magnetized and transverse polarized (or T-T) modes. Magnetoelectric (ME) couplings both at low-frequency and resonance-frequency have been studied, and our analysis predicts that (i) the ME voltage coefficients of both L-T and T-T modes in- crease with increasing the thickness of the piezoelectric phase whereas magnetostrictive phase thickness keeps constant, and then tend to saturation when the thickness ratio of piezoelectric phase to magnetic phases is >3; (ii) there are the optimum thickness ratios that maximize magnetoelectric (ME) voltage coefficients for the two modes, which are dependent on elastic compliances ratio of piezoelec- tric phase and magnetostrictive phase; and (iii) the ME voltage coefficients are dramatically increased by a factor of ~Qm, when operated at resonance frequency. A series of Terfenol-D/PZT laminates were fabricated, and the results were compared with the theoretical ones. Experiments confirmed that equivalent circuit method is a useful tool for optimum designs of ME laminates. | DONG ShuXiang ZHAI JunYi | 2008 | Chinese Science Bulletin2008，53，14： | 13 |
| 2 | Self-powered electrochromic devices with tunable infrared intensity显示文摘Triboelectric nanogenerator(TENG) is an efficient way to convert ambient mechanical energy into electricity to power up portable electronics.In this work,a flexible infrared electrochromical device(IR-ECD)with stable performances was assembled with a TENG for building self-powered infrared detector with tunable intensity.As driven by TENG,the electrochromic device could be operated in the mid-IR region due to the reversible electrochromic reactions.An average infrared reflectance contrast of 46% was achieved in 8–14 lm regions and as well a clear thermal image change can be observed.This work indicates that the TENG-driven infrared electrochromical device has potential for use in self-powered camouflage and thermal control. | Jiangman sun xiong pu Chunyan Jiang Chunhua Du Mengmeng Liu Yang Zhang Zhitian Liu Junyi Zhai Weiguo Hu Zhong Lin Wang | 2018 | Science Bulletin2018，63，12： | 6 |
| 3 | Enhanced NO_2 gas sensing of a single-layer MoS_2 by photogating and piezo-phototronic effects显示文摘NO_2 sensors with ultrahigh sensitivity are demanded for future electronic sensing systems. However,traditional sensors are considerably limited by the relative low sensitivity, high cost and complicated process. Here, we report a simply and reliable flexible NO_2 sensor based on single-layer MoS_2. The flexible sensor exhibits high sensitivity to NO_2 gas due to ultra-large specific surface area and the nature of two-dimensional(2 D) semiconductor. When the NO_2 is 400 ppb(parts per billion), compared with the dark and strain-free conditions, the sensitivity of the single-layer sensor is enhanced to 671% with a625 nm red light-emitting diode(LED) illumination of 4 mW/cm^2 power under 0.67% tensile strain.More important, the response time is dramatically reduced to $16 s and it only needs $65 s to complete90% recovery. A theoretical model is proposed to discuss the microscopic mechanisms. We find that the remarkable sensing characteristics are the result of coupling among piezoelectricity, photoelectricity and adsorption-desorption induced charges transfer in the single-layer MoS_2 Schottky junction based device.Our work opens up the way to further enhancements in the sensitivity of gas sensor based on single-layer MoS_2 by introducing photogating and piezo-phototronic effects in mesoscopic systems. | Junmeng Guo Rongmei Wen Junyi Zhai Zhong Lin Wang | 2019 | Science Bulletin2019，64，2： | 5 |
| 4 | Self-powered acoustic source Iocator in underwater environment based on organic film triboelectric nano-generator显示文摘 | Aifang Yu Ming Song Yan Zhang Yang Zhang Libo Chen Junyi Zhai Zhong Lin Wang | 2015 | Nano Research2015，8，3： | 4 |
| 5 | D Small DC Magnetic Field Response of Magnetoelectric Laminate Composites显示文摘 | Dong Shuxiang Zhai Junyi Li JieFeng and Viehland | | Applied Physics Letters 880，2006，： | 1 |
| 6 | Magnetoelectric laminate composites: an overview显示文摘 | ZHAI Junyi XING Zengping DONG Shuxiang | 2008 | Journal of the American Ceramic Society2008，91，2： | 1 |
| 7 | Giant magnetoelectric effect in multiferroic laminated composites 显示文摘 | Yuanhua Lin Ning Cai Junyi Zhai | 2005 | Phys Rev B2005，72，01： | 1 |
| 8 | Large high frenquency magnetoelectric response in laminated com- posites of piezoelectric ceramics, rare-earth iron alloys and polymer显示文摘 | CAI Ning NAN Cewen ZHAI Junyi | 2004 | Applied Physics Letters2004，84，18： | 1 |
| 9 | Giant magnetoelectrie effect in multiferroic laminated com- posites显示文摘 | LIN Yuanhua CAI Ning ZHAI Junyi | 2005 | PhysiCal Review B2005，72，1： | 1 |
| 10 | Manipulating functional groups between polyvinylidene difluoride and nanoparticles for high-performance triboelectric nanogenerator显示文摘Interface functional groups play an essential role in regulating the electrical properties of bulk materials.In this work,we designed a novel strategy to explore a new way to enhance triboelectric performance by regulating the functional groups between nano-fillers and polymer matrix without obvious changes in the dielectric constant.The silica nanoparticles(SNPs)modified perfluoro-silane coupling agents(PFSCAs)with different chain lengths were added to the polyvinylidene difluoride to regulate the transferred charge density(TCD)of triboelectric nanogenerators(TENGs).When the doping concentration of perfluorodecyl modified SNPs is 2.25 wt.%,the nanocomposite film based TENG exhibits the maximum TCD of 166μC/m^(2)and power density of 3.12 W/m^(2)which are 6 times and 39 times as big as those of pure polyvinylidene difluoride(PVDF)film.The charge accumulation and decay process show that interface functional groups dominate the performance of TENGs.Then,a Fermi level model is proposed and why the TCD could be regulated by the concentration of nanoparticles in bulk materials is explained.This work provides a new concept for understanding the performance of TENG independent dielectric constant and points out a new direction for enhancing TENG’s performance,since wealthy functional groups with selectivity are applicable. | Zekun Li Lu Zhang Lihao Guo Wenwen Hu Aifang Yu Junyi Zhai | 2023 | Nano Research2023，16，9： | 1 |
| 11 | Controllable design of high-efficiency triboelectric materials by functionalized metal–organic frameworks with a large electronwithdrawing functional group显示文摘Triboelectric nanogenerator(TENG)can directly convert mechanical energy into electric energy.However,the triboelectric materials are limited to the triboelectric series.Here,for the first time,we choose the isostructural UiO-66-X(X=H,NH_(2),NO_(2),and Br)family as triboelectric materials to investigate the underlying relationships between different functional groups and the triboelectric performance of TENG.Unlike traditional triboelectric material organic polymers,metal–organic frameworks(MOFs)can be oriented design synthesis and functionalized with various functional groups.The results demonstrate that the largest output voltage and current are from UiO-66-NO_(2) TENG,and are about 23.79 V and 0.29μA,which are 3.19 and 4.14 times over that of the UiO-66 TENG,respectively.The working mechanism of the MOF TENG was discussed in depth through experiments and theoretical calculations.This work proves a novel strategy to obtain high output properties by functionalized MOFs with large electron-withdrawing functional groups and promising guidance for the choice of high-efficiency triboelectric materials. | Rongmei Wen Rui Feng Bo Zhao Jiangfeng Song Liming Fan Junyi Zhai | 2022 | Nano Research2022，15，10： | 1 |
| 12 | Polymer- embedded carbon nanotube ribbons for stretchable conductors 显示文摘 | Zhang Yingying Sheehan C J Zhai Junyi | 2010 | Advanced Materials2010，22，28： | 1 |
| 13 | Dielectric, ferroelectric, magnetic, and magnetoelectric properties of multiferroic laminated composites显示文摘 | Cai Ning Zhai Junyi Nan Cewen | 2003 | Phys Rev B2003，68，22： | 1 |
| 14 | Fabrication of highly luminescent TiO_(2):Eu^(3+) thin film with low annealing temperature requirement by co-doping with Sn^(4+) ions显示文摘Rare earth(RE)-doped TiO_(2)thin films possess important applications in modern optoelectronic devices.However,the high annealing temperature requirement remains a critical restriction in device fabrications.In this work,TiO_(2)thin films doped with trivalent europium(Eu^(3+))ions were fabricated by a convenient sol-gel approach and subsequent annealing treatment.Interestingly,it is found that the optimal post-annealing temperature of TiO_(2):Eu^(3+)thin film is dramatically reduced from 800 to 300℃by incorporating 10 at%Sn^(4+)into the sol precursor.The Sn-incorporated film annealed at 300℃shows a 4-fold enhancement in photoluminescence(PL)intensity related to Eu^(3+)ions to the optimized Sn-free film.Systematic analysis reveals that this enhancement is attributed to Sn element promoting the crystallization of both anatase TiO_(2)and rutile SnO_(2)clusters at 300℃,which provides sufficient SnO_(2)/TiO_(2)crystal boundary facilitating Eu^(3+)to occupy and sensitized by SnO_(2)crystals.These results provide valuable insights into fabricating highly luminescent RE-doped TiO_(2)thin films with low annealing temperature requirement,which is essential for designing optoelectronic devices based on RE materials more freely in the future. | Lu Zhang Bolin Zheng Junyi Zhai Tao Lin | 2023 | Journal of Rare Earths2023，41，10： | 0 |
| 15 | Piezophototronic Devices显示文摘Multifunctional micro/nano devices and systems are of important applications in smart electronics for health care,human-machine interfacing,infrastructure monitoring and security.In recent years,piezophototronic effect is developed fast since it offers a new method to improve/tune the optoelectronic | Junyi Zhai | 2016 | 功能材料信息2016，13，2： | 0 |
| 16 | A columnar multi-layer sliding triboelectric nanogenerator for water wave energy harvesting independent of wave height and direction显示文摘The ocean,with its highly variable and complex meteorological conditions,harbors enormous renewable resources.Triboelectric nanogenerators(TENGs),which possess unique advantages,show exciting prospects in water wave energy collection.How to design and optimize TENGs to cover all characteristic water wave energies and achieve efficient energy utilization is emergent.In this paper,we carefully designed and fabricated a columnar multi-layer sliding TENG(CMLS-TENG)that can harvest water wave energy independent of wave height and direction.Drive rods with a hollow acrylic spherical shell were introduced to deliver wave energy,ensuring that the CMLS-TENG can work in all directions from 0°to 360°.Based on the sliding structure,switching the optimized CMLS-TENG is independent of wave heights.The optimized CMLS-TENG can achieve a total power density of 730 mW/m^(3) at a wave height of only 4.8 cm regardless of wave direction,which can illuminate multiple light-emitting diodes(LEDs)to provide lighting and provide power to a watch and a hygrometer for temperature and humidity monitoring.This work provides new choices and hopes for the effective collection of full-range water wave energy. | Xue Miao Hanxiao Yang Zekun Li Meifei Cheng Yilin Zhao Lingyu Wan Aifang Yu Junyi Zhai | 2024 | Nano Research2024，17，4： | 0 |
| 17 | Ultraviolet Photodetector based on Sr_(2)Nb_(3)O_(10) Perovskite Nanosheets显示文摘Liquid-phase exfoliation was employed to synthesize Sr_(2)Nb_(3)O_(10) perovskite nanosheets with thicknesses down to 1.76 nm.Transmission electron microscopy(TEM),atomic force microscope(AFM),X-ray photoelectron spectrometer(XPS),and other characterization techniques were used to evaluate the atomic structure and chemical composition of the exfoliated nanosheets.A UV photodetector based on individual Sr_(2)Nb_(3)O_(10) nanosheets was prepared to demonstrate the application of an ultraviolet(UV) photodetector.The UV photodetector exhibited outstanding photocurrent and responsivity with a responsivity of 3×10^(5) A·W^(-1) at 5 V bias under 280 nm illumination,a photocurrent of 60 nA,and an on/off ratio of 3×10^(2). | 张斌斌 JIA Mengmeng LIANG Qi WU Jinsong ZHAI Junyi 李宝文 | 2024 | Journal of Wuhan University of Technology(Materials Science)2024，39，2： | 0 |
| 18 | Piezoelectric and deformation potential effects of straindependent luminescence in semiconductor quantum well structures显示文摘紧张依赖者光的机制为察觉到压力的设备的合理设计是重要的。interband 动量矩阵元素是为理解光现象的关键数量。我们经分解解决了无限的量很好( IQW )与种类当模特儿,在为 Fe 2 O 3-SnO2/graphene 混血儿,在哪个零维( 0D )有 8 nm 的一条平均直径的 SnO 2 nanoparticles 并且一个维( 1D ) Fe 2有一段~的 O 3 nanorods 150 nm 同类地被依附到上二维( 2D )减少了 graphene 氧化物 nanosheets ,产生唯一的夏威夷人用芋头做成的食品完成的 Fe 2 O 3-SnO2/graphene 展出明确的形态学, u?? | Aihua Zhang Mingzeng Peng Morten Willatzen Junyi Zhai Zhong Lin Wang | 2017 | Nano Research2017，10，1： | 0 |
| 19 | Recent Progress of Functional Fiber and Textile Triboelectric Nanogenerators:Towards Electricity Power Generation and Intelligent Sensing显示文摘Rapid development in wearable electronics has brought huge convenience to human life and gradually penetrated into various indispensable felds,such as health monitoring,medical assistance,smart sports,object tracking and smart home,etc.However,the suitable energy supply system for these wearable electronics remains an important issue to address.Fiber and textile triboelectric nanogenerators(f/t-TENGs),capable of converting biomechanical energy into electricity,have promising features to act as a mobile sustainable power source for wearable electronics or directly serve as an intelligent self-powered sensing solution.Compared with the low-output piezoelectric nanogenerators,hard-to-wear electromagnetic generators and other bulk TENGs,the fber/textile TENG may be the best type of wearable human mechanical energy harvester at present.Herein,this review comprehensively introduces the recent progress of smart fbers and textiles with a highlight on triboelectric nanogenerators,including the general materials and structures of fber/textile shaped electronics,various fber and textile devices for triboelectric/triboelectric-integrated energy harvesting and self-powered smart sensing systems.Moreover,the advance of f/t-TENGs with multifunctionality and large-scale textile processing techniques is summarized as well.Finally,the challenges and perspectives of f/t-TENGs for future improvement,large-scale production and emerging applications are thoroughly discussed as well. | Wei Wang Aifang Yu Junyi Zhai Zhong Lin Wang | 2021 | Advanced Fiber Materials2021，3，6： | 0 |
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