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Highly Transparent and Adhesive Poly(vinylidene difluoride)Films for Self-Powered Piezoelectric Touch Sensors

Chinese Journal of Polymer Science 2022年第7期40卷 726-737页

作者： Qing-Qing Li Guang-Kuo Wang Zi-Xu Liang Zhi-Jun Hu School of Optoelectronic Science and Engineering&Collaborative Innovation Center of Suzhou Nano Science and technology Soochow UniversitySuzhou215006China Center for Soft Condensed Matter Physics and Interdisciplinary Research Soochow UniversitySuzhou215006China Soochow University Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province&Key Lab of Modern Optical Technologies of Education Ministry of ChinaSuzhou215006China

With the rapid development of internet of things,self-powered touch sensors made of piezoelectric fluorinated polymers have attracted significant interest because they can constantly convert mechanical energy into electrical energy without external power ***,it is still challenging to fabricate fluorinated polymer films with good adhesion and high output performance with a large-scale and low-cost method while maintaining high transparency,which are extremely important for simultaneous optical detection and electromechanical *** this work,we demonstrate that the incorporation of a molecular ferroelectric-dabcoHReO_(4)(DH)into poly(vinylidene difluoride)(PVDF)solution enables high-throughput and low-temperature processing of flexible and transparent piezoelectric films by scalable processing *** effects of multiaxial DH are ***,DH can trigger the phase transition of PVDF fromα-toβ-phase and realize the orderly orientation of PVDF,which guarantees higher piezoelectric performance without any additional electrical poling ***,the hydrophilic nature of DH can improve the adhesion properties of PVDF,which in turn improve the stability and durability of the *** optimizing the fabrication processes,the transmittance of the piezoelectric touch sensors based on PVDF films and Ag nanowires coated poly(ethylene terephthalate)electrodes can be higher than 94%.The piezoelectric voltage constant g;of the transparent films can reach to 1.2 V·m·N;,which is at least three times higher than the commercially available PVDF films obtained by *** results indicate that the flexible piezoelectric sensors have potential applications in transparent electronic devices for mechanical sensing and energy harvesting.

关键词： PVDF Transparent Adhesive Large scale Piezoelectric sensor

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Polar Phase Formation and Piezoelectricity of PVDF by Hot-pressing under Electrostatic Intermolecular Interactions

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Chinese Journal of Polymer Science 2022年第7期40卷 799-806页

作者： Jing-Hua Zhao Bao-Sheng He Ao-Shen Li Chao-Nan Wang Qing-Qing Li Zhi-Jun Hu Center for Soft Condensed Matter Physics and Interdisciplinary Research Soochow UniversitySuzhou215123China School of Optoelectronics Science and Engineering&Collaborative Innovation Center of Suzhou Nano Science and technology Soochow UniversitySuzhou215006China key lab of advanced Optical manufacturing Technologies of Jiangsu province&key lab of Modern Optical Technologies of Education Ministry of China Soochow UniversitySuzhou215006China

Piezoelectric poly(vinylidene fluoride)(PVDF)has received considerable attention due to its ability of interconverting mechanical into electric energies and potential applications in wearable *** achieve piezoelectricity,it is important to simultaneously control the formation of polar phases,crystallinity,and dipole alignments in PVDF-based *** we demonstrate that piezoelectricity can be obtained by directly hot-pressing PVDF films sandwiched between chitosan or cellulose *** electrostatic interactions between PVDF and chitosan or cellulose enabled an exceptional high content of polar phases(β-andγ-phases)up to 90%and a measured piezoelectric charge coefficient d_(33)of up to-30 pC/*** study provides a simple and low-cost approach for obtaining piezoelectric PVDF films used for sensors,actuators,and energy harvesters.

关键词： Poly(vinylidene fluoride) Piezoelectricity Electrostatic interactions Hot-pressing

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Efficient Environment-friendly Lead-free Tin Perovskite Solar Cells Enabled by Incorporating 4-Fluorobenzylammonium Iodide Additives

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能源与环境材料（英文） 2023年第6期6卷 318-326页

作者： Shengli Zou Shengqiang Ren Yiting Jiang Yuanfang Huang Wenwu Wang Changlei Wang Cong Chen Xia Hao Lili Wu Jingquan Zhang Dewei Zhao College of Materials Science and Engineering & Institute of New Energy and Low-Carbon technology Sichuan UniversityEngineering Research Center of Alternative Energy Materials & DevicesMinistry of EducationChengdu 610065China School of Optoelectronic Science and Engineering & Collaborative Innovation Center of Suzhou Nano Science and technology Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province & Key Lab of Modern Optical Technologies of Education Ministry of ChinaSoochow UniversitySuzhou 215006China

Development of tin(Sn)-based perovskite solar cells(PSCs)largely lags behind that of lead counterparts due to fast crystallization process of Sn perovskite and numerous defects in both bulk and surface of Sn perovskite ***,this work reports a facile strategy of introducing 4-fluorobenzylammonium iodide(FBZAI)as additives into Sn perovskite precursor to synergistically modulate the roles of benzylamine and fluorine in Sn-based *** of FBZAI can increase crystallinity,passivate defects,and inhibit the oxidation of Sn2+,leading to suppression of nonradiative recombination and enhancement of charge transport and collection in *** a result,the best-performing Sn-based PSC with the FBZAI additive achieves the maximum PCE of 13.85％with the enhanced fill factor of 77.8％and open-circuit voltage of 0.778 *** unencapsulated device exhibits good stability by maintaining 95％of its initial PCE after 160 days of storage.

关键词： 4-fluorobenzylammonium iodide defect passivation lead-free Sn perovskites perovskite solar cells stability

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BSA stabilized photothermal-fenton reactor with cisplatin for chemo/chemodynamic cascade oncotherapy

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Nano Research 2022年第3期15卷 2235-2243页

作者： Nan Yang Tian Zhang Changyu Cao Genxiang Mao Jinjun Shao Xuejiao Song Wenjun Wang Xiaozhou Mou Xiaochen Dong key laboratory of Flexible Electronics(KLOFE)and Institute of advanced Materials(IAM) School of Physical and Mathematical SciencesNanjing Tech University(NanjingTech)Nanjing 211816China School of Physical Science and Information technology Liaocheng UniversityLiaocheng 252059China zhejiang Provincial key lab of Geriatrics&Geriatrics Institute of zhejiang province Department of GeriatricsZhejiang HospitalHangzhou 310013China Clinical Research Institute Zhejiang Provincial People’s HospitalAffiliated People’s HospitalHangzhou Medical CollegeHangzhou 310014China

Cisplatin(CDDP)-based chemotherapy is substantially limited in the clinic due to its high postoperative recurrence *** therapy has been proven as a potent approach to minimize recurrence and achieve enhanced treatment ***,chemotherapy drug CDDP is assembled with the photothermal-Fenton agent of bovine serum albumin(BSA)stabilized gallic acid-functionalized iron nanoparticles(GA-Fe NPs)to achieve chemo/chemodynamic synergistic cascade *** Pt-GA-Fe NPs can be utilized to generate H_(2)O_(2) via the activation of nicotinamide adenine dinucleotide phosphate(NADPH)oxidases(NOXs)in the tumor microenvironment(TME),which would then greatly boost H2O2-depending chemodynamic therapy(CDT).The generated cytotoxic reactive oxygen species(hydroxyl radicals,·OH)and the depletion of glutathione(GSH)would further promote CDDP-induced DNA ***,benefiting from the absorption in the near-infrared(NIR)region,Pt-GA-Fe NPs exhibit excellent photothermal conversion efficiency(η=45.5%)and allow photoacoustic imaging(PAI)guided photothermal therapy(PTT).In vitro and in vivo experiments show that synergy therapy can effectively kill cancer cells and successfully cure cancer without systemic *** work highlights a new type of therapeutic agent based on CDDP with the ability of H_(2)O_(2) self-generation,thermal responsiveness,and enhanced CDT effects for applications in cancer therapy.

关键词： chemotherapy chemodynamic therapy cascade therapy CDDP Fenton reaction

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High performance of hot-carrier generation,transport and injection in TiN/TiO_(2)junction

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Frontiers of physics 2022年第5期17卷 35-45页

作者： Tingting Liu Qianjun Wang Cheng Zhang Xiaofeng Li Jun Hu School of Optoelectronic Science and Engineering&Collaborative Innovation Center of Suzhou Nano Science and technology Soochow UniversitySuzhou 215006China key lab of advanced Optical manufacturing Technologies of Jiangsu province&key lab of Modern Optical Technologies of Education Ministry of China Soochow UniversitySuzhou 215006China School of Physical Science and technology Soochow UniversitySuzhou 215006China School of Physical Science and technology Ningbo UniversityNingbo 315211China

Improving the performance of generation,transport and injection of hot carriers within metal/semiconductor junctions is critical for promoting the hot-carrier ***,the conversion efficiency of hot carriers in the commonly used noble metals(e.g.,Au)is extremely ***,through a systematic study by first-principles calculation and Monte Carlo simulation,we show that TiN might be a promising plasmonic material for high-efficiency hot-carrier *** with Au,TiN shows obvious advantages in the generation(high density of low-energy hot electrons)and transport(long lifetime and mean free path)of hot *** further performed a device-oriented study,which reveals that high hotcarrier injection efficiency can be achieved in core/shell cylindrical TiN/TiO_(2)*** findings provide a deep insight into the intrinsic processes of hot-carrier generation,transport and injection,which is helpful for the development of hot-carrier devices and applications.

关键词： metal/semiconductor junction plasmonic material hotcarrier generation lifetime and mean free path injection efficiency

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A fast integral sliding mode controller with an extended state observer for position control of permanent magnet synchronous motor servo systems

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Frontiers of Information technology & Electronic Engineering 2020年第8期21卷 1239-1250页

作者： Jun-feng JIANG Xiao-jun ZHOU Wei ZHAO Wei LI Wen-dong ZHANG State key laboratory of Fluid Power and Mechatronic Systems Zhejiang UniversityHangzhou 310027China zhejiang province key laboratory of advanced manufacturing technology Zhejiang UniversityHangzhou 310027China Northwest Institute of Mechanical and Electrical Engineering Xianyang 712099China Beijing Linkstech technology Co. LtdBeijing 102200China

Permanent magnet synchronous motor(PMSM)has been widely used in position control *** performance is not satisfactory due to internal uncertainties and external load *** enhance the control performance of PMSM systems,a new method that has fast response and good robustness is proposed in this ***,a modified integral terminal sliding mode controller is developed,which has a fast-sliding surface and a continuous reaching ***,an extended state observer is applied to measure the internal and external ***,the disturbances can be compensated for in a feedforward *** with other sliding mode methods,the proposed method has faster response and better robustness against system *** addition,the position tracking error can converge to zero in a finite *** and experimental results reveal that the proposed control method has fast response and good robustness,and enables high-precision control.

关键词： Permanent magnet synchronous motor(PMSM) Sliding mode controller Extended state observer Robust control Motion control

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Mechanism of high growth rate for diamond-like carbon films synthesized by helicon wave plasma chemical vapor deposition

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Plasma Science and technology 2018年第2期20卷 166-171页

作者：季佩宇於俊黄天源金成刚杨燕诸葛兰剑吴雪梅 College of Physics Optoelectronics and Energy & Collaborative Innovation Center of Suzhou Nano Science and Technology Soochow University Suzhou 215006 People's Republic of China key lab of advanced Optical manufacturing Technologies of Jiangsu province & key lab of Modem Optical Technologies of Education Ministry of China Soochow University Suzhou 215006 People's Republic of China Analysis and Testing Center Soochow University Suzhou 215123 People's Republic of China

A high growth rate fabrication of diamond-like carbon（DLC）films at room temperature was achieved by helicon wave plasma chemical vapor deposition（HWP-CVD）using Ar/CH4gas *** microstructure and morphology of the films were characterized by Raman spectroscopy and scanning electron *** diagnosis of plasma excited by a helicon wave was measured by optical emission spectroscopy and a Langmuir *** mechanism of high growth rate fabrication for DLC films by HWP-CVD has been *** growth rate of the DLC films reaches a maximum value of 54μm h^-1at the CH4flow rate of 85 sccm,which is attributed to the higher plasma density during the helicon wave plasma *** CH and Hαradicals play an important role in the growth of DLC *** results show that the Hαradicals are beneficial to the formation and stabilization of C=C bond from sp^2to sp^3.

关键词： helicon wave plasma diamond-like carbon film sp^3 content Raman spectra

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Sulfur-deficient Co9S8/Ni3S2 nanoflakes anchored on N-doped graphene nanotubes as high-performance electrode materials for asymmetric supercapacitors

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Science China(Technological Sciences) 2020年第4期63卷 675-685页

作者： ZHAO Jian SONG GuanYing YUAN XiangCheng SHEN Tong JIANG QingYan MENG ALan LIN YuSheng LI ZhenJiang LI QingDang key laboratory of Polymer Material advanced manufacturing technology of Shandong Provincial College of Electromechanical EngineeringCollege of Sino-German Science and TechnologyQingdao University of Science and TechnologyQingdao 266061China State key laboratory Base of Eco-chemical Engineering College of Chemistry and Molecular EngineeringCollege of Materials Science and EngineeringQingdao University of Science and TechnologyQingdao 266042China Ocean College Zhejiang UniversityZhoushan 316021China

In this paper,Co9S8/Ni3S2 nanoflakes(NFs)with sulfur deficiencies were grown in-situ on N-doped graphene nanotubes(NGNTs).They were successfully prepared through electrodeposition followed by hydrogenation treatment,which is able to act as a self-supported electrode for asymmetric supercapacitors(ASCs).Combining the defect-rich active materials with highly conductive skeletons,the hybrid electrode N-GNTs@sd-Co9S8/Ni3S2NFs show ultrahigh specific capacity of^304 mA hg^-1 and prominent rate capability(capacity retention ratio of^85%even at 100 Ag^-1),and deliver a long cycling lifespan of^1.9%capacitance loss after 10000 *** addition,an ASC was constructed using the as-synthesized composite electrode as the positive electrode and active carbon(AC)as the negative *** fabricated device shows a high energy density of^45.1 Wh kg^-1 at^3.4 kW kg^-1 and superior cycling *** work substantiates a smart strategy to fabricate novel composite electrode materials for next-generation supercapacitors by incorporating riched deficiencies into nanostructures.

关键词： sulfur-deficient Co9S8/Ni3S2NFs N-doped graphene nanotubes ultrahigh specific capacity prominent rate performance asymmetric supercapacitors

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Highlights on inorganic solid state chemistry and energy materials

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Science China(Technological Sciences) 2012年第11期55卷 3248-3252页

作者： LIU AiPing DONG WenJun Center for Optoelectronics Materials and Devices Department of PhysicsKey Laboratory of Advanced Textile Materials and Manufacturing TechnologyEngineering Research Center for Eco-Dying&Finishing of TextilesMinistry of EducationZhejiang Sci-Tech UniversityHangzhou 310018China

This review highlights the recent research progress on inorganic solid state energy materials in China,from synthesis and fundamental properties to their *** describes the significant contributions of Chinese scholars in the field of inorganic solid state chemistry and energy materials including green catalysts,fuel cells,lithium batteries,solar cells,hydrogen storage materials,thermoelectric materials,luminescent materials and superconductors,and then outlines the ongoing rapid progress of novel inorganic solid state materials and the development of reliable and reproducible preparation methods for inorganic solid state materials in ***,we conclude the paper by considering future developments of inorganic solid state chemistry and energy materials in China.

关键词： inorganic solid state materials energy materials

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Experimental Study on the Improvement of Yaw Stability by Coordination Control between the Caudal Fin and Anal Fin

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Journal of Bionic Engineering 2022年第5期19卷 1261-1271页

作者： Jiang Ding Changzhen Zheng Chaocheng Song Qiyang Zuo Yaohui Xu Bingbing Dong Jiaxu Cui Kai He Fengran Xie College of Mechanical Engineering Guangxi UniversityNanning 530004China Guangxi key lab of manufacturing System and advanced manufacturing technology Nanning 530004China Shenzhen Institute of advanced technology Chinese Academy of SciencesShenzhen 518055China Shenzhen key laboratory of Precision Engineering Shenzhen 518055China University of Chinese Academy of Sciences Beijing 100049China College of Mechanical Automation Wuhan University of Science and TechnologyWuhan 430000China SIAT Branch Shenzhen Institute of Artificial Intelligence and Robotics for SocietyShenzhen 518055China

Due to the unique locomotion,the head-shaking problem of biomimetic robotic fish inevitably occurs during rectilinear locomotion,which strongly hinders its practical *** this paper,we experimentally study this problem by proposing the method of coordination control between the caudal fin and anal ***,an untethered biomimetic robotic fish,equipped with an anal fin,a caudal fin and two pectoral fins,is developed as the experimental ***,a Central Pattern Generator(CPG)-based controller is used to coordinate the motions of the anal fin and caudal ***,extensive experiments are conducted to explore different combinations of the flapping frequencies,the flapping amplitudes,and the phase differences between the anal fin and caudal ***,through proper control of the anal fin,the amplitude of the yaw motion can be as small as 4.32°,which sees a 65%improvement compared to the scenario without anal fin,and a 57%improvement compared to that with a stationary anal *** paper provides a novel way to alleviate the head-shaking problem for biomimetic robotic fish,and first test this method on an untethered,freely swimming robotic platform,which can shed light on the development of underwater robotics.

关键词： Biomimetic robotic fish Anal fin Head-shaking Yaw stability

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