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Energy & Environmental Materials 2024年第4期7卷 404-412页

作者： Kang Huang wenzhuo wu Song Xu Pengfei Yan Zhongming Wei Qun Xu Henan Institute of Advanced Technology Zhengzhou University College of Materials Science and Engineering Zhengzhou University State Key Laboratory of Superlattices and Microstructures Institute of Semiconductors Chinese Academy of Sciences

Modulation of Si-O bonds under mild conditions has been a challenging issue in the field of material science,which is critical to manufacture highperformance silica-based optical and photonic ***,we introduce a nondestructive technique to achieve Si-O bond rearrangement,leading to plastic deformation and photoluminescence enhancement of amorphous silica nanoparticles using supercritical carbon dioxides in EtOH/H2O solution under mild temperature.

关键词： amorphous silica anisotropic stress photoluminescence plastic deformation supercritical CO2

Cation-Anion Redox Active Organic Complex for High Performance Aqueous Zinc Ion Battery

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Energy & Environmental Materials 2024年第1期7卷 64-71页

作者： Lilin Zhang Yining Chen Zongyuan Jiang Jingwei Chen Cong Wei wenzhuo wu Shaohui Li Qun Xu School of Materials Science and Engineering Zhengzhou University Henan Institute of Advanced Technology Zhengzhou University School of Materials Science and Engineering Ocean University of China

Organic redox compounds are attractive cathode materials in aqueous zincion batteries owing to their low cost,environmental friendliness,multipleelectron-transfer reactions,and resource ***,the realized energy density... 详细信息

关键词： cathode materials cyano groups electrochemical activation organic charge–transfer complex zinc-ion battery

Changes in Polyphenols and Antioxidant Activities of Yingshan Yunwu Tea during Digestion in Vitro

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Medicinal Plant 2024年第2期15卷 21-25页

作者： Ruyi ZHENG Jinjie ZHOU wenzhuo wu Jianfeng ZHAN Peng wu Ting DING Weixin WANG College of Biology and Agricultural Resources Huanggang Normal UniversityHubei Collaborative Innovation Center for the Characteristic Resources Exploitation of Dabie MountainsHubei Key Laboratory of Economic Forest Germplasm Improvement and Resources Comprehensive UtilizationHuanggang 438000China Hubei Hongan County Public Inspection and Testing Center Huanggang 438000China

[Objectives]To explore the change rule of polyphenol content and antioxidant activity of coarse old leaves of Yingshan Yunwu Tea in the process of human digestion.[Methods]The coarse and old leaves of Yunwu tea in Yingshan,Huanggang,Hubei Province were selected as the research object,and their digestion in vitro was *** total polyphenol content was determined by Folin-phenol reagent colorimetric method,and the DPPH radical scavenging activity and total antioxidant activity were determined.[Results]After simulated gastrointestinal digestion in vitro,the polyphenol content and antioxidant activity of coarse old leaf tea soup showed a downward *** gastrointestinal digestion,the polyphenol content in tea infusion separately decreased by 31.8%and 8.5%;the scavenging rate of DPPH free radical was 97%before digestion,decreased to 92%after gastric digestion and 65%after intestinal digestion,which decreased by 5%and 27%,respectively;after gastrointestinal digestion,the total antioxidant capacity of tea soup decreased by 4.7%and 3.1%,respectively.[Conclusions]This study provided a reference for the development and application of coarse old leaves of Yingshan Yunwu tea,and provided a reference for the nutritional value evaluation and comprehensive utilization of coarse old leaves,so as to make the best use of coarse tea leaves and reduce the waste of resources.

关键词： Coarse old leaves of Yunwu tea Polyphenol Digestion in vitro Antioxidant activity

Piezotronics and piezo-phototronics: fundamentals and applications

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National Science Review 2014年第1期1卷 62-90页

作者： ZhongLin Wang wenzhuo wu School of Materials Science and Engineering Georgia Institute of Technology Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of Sciences

Technology advancement that can provide new solutions and enable augmented capabilities to complementary metal–oxide–semiconductor(CMOS)-based technology,such as active and adaptive interaction between machine and human/ambient,is highly *** nanodevices and integrated systems exhibit potential in achieving these application *** the gating efect of piezopotential over carrier behaviors in piezoelectric semiconductor materials under externally applied deformation,the piezoelectric and semiconducting properties together with optoelectronic excitation processes can be coupled in these materials for the investigation of novel fundamental physics and the implementation of unprecedented *** is created by the strain-induced ionic polarization in the piezoelectric semiconducting *** deal with the devices fabricated using the piezopotential as a‘gate’voltage to tune/control charge-carrier transport across the metal–semiconductor contact or the p–n ***-phototronics is to use the piezopotential for controlling the carrier generation,transport,separation and/or recombination for improving the performance of optoelectronic *** review intends to provide an overview of the rapid progress in the emerging ields of piezotronics and *** concepts and results presented in this review show promises for implementing novel nano-electromechanical devices and integrating with micro/nano-electromechanical system technology to achieve augmented functionalities to the state-of-the-art CMOS technology that may ind applications in the human–machine interfacing,active lexible/stretchable electronics,sensing,energy harvesting,biomedical diagnosis/therapy,and prosthetics.

关键词： piezotronic efect piezo-phototronic efect piezopotential piezotronics MEMS sensors

Biopolymers-based skin-interfaced triboelectric sensors

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Nano Research 2023年第9期16卷 11753-11782页

作者： Shujia Xu Pedro Henrique de Souza Barbosa wenzhuo wu School of Industrial Engineering Purdue UniversityWest LafayetteIN 47907USA Flex Laboratory Purdue UniversityWest LafayetteIN 47907USA Regenstrief Center for Healthcare Engineering Purdue UniversityWest LafayetteIN 47907USA Birck Nanotechnology Center Purdue UniversityWest LafayetteIN 47907USA The Center for Education and Research in Information Assurance and Security(CERIAS) Purdue UniversityWest LafayetteIN 47907USA

Rapid advances in artificial intelligence,robotics,and remote healthcare have increased the demand for sustainable and highperformance wearable *** devices are gaining traction due to their self-powered operation capability and potential as wearable energy ***-interfaced triboelectric sensors(SITSs)can detect various mechanical signals and monitor physiological signals in ***-based SITSs are ideal for skin-interfaced applications since they are biocompatible and *** review focuses on the recent advancements of SITS made from biocompatible polymer materials,such as plant-based,animal-based,and synthetic polymers,and highlights their potential for various applications,including human–machine interface(HMI)and physiological *** addition,the fundamentals,challenges,and prospects of SITS based on biocompatible polymers are discussed.

关键词： skin interfaced triboelectric sensors wearable devices biopolymers

“源-网-荷-储”互动下适应多元主体需求的灵活性交易机制研究

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现代电力 2024年第4期41卷 755-764页

作者：董治新韩雅萱杨丽李华吴文卓刘敦楠华北电力大学经济与管理学院北京市昌平区102206 广东电网有限责任公司广州供电局广东省广州市510620 国家电网(上海)智能电网研发投资有限公司上海市浦东新区200126

“源−网−荷−储”互动模式下,不同类型的电力资源得以相互结合,突破了电力生产消费的流通壁垒,在主体类型、交易品种、组织方式、出清方法等方面都发生了较大变化。源网荷储互动要求多能源、多主体同台竞价,不同市场主体的物理经济特性... 详细信息

“源−网−荷−储”互动模式下,不同类型的电力资源得以相互结合,突破了电力生产消费的流通壁垒,在主体类型、交易品种、组织方式、出清方法等方面都发生了较大变化。源网荷储互动要求多能源、多主体同台竞价,不同市场主体的物理经济特性和交易需求对现有交易机制提出了巨大挑战,传统分时出清模型难以兼顾各方诉求,交易品种及申报方式缺乏灵活性,难以真正发挥互动特性,因此,亟需设计更加多样、灵活的市场化竞争机制。首先从“源−网−荷−储”互动模式理念出发,分析其发展的关键因素,然后对“源−网−荷−储”互动模式下的电力资源特性进行分析,总结多元主体的交易特性。基于此,对交易机制进行设计,提供满足多元主体需求的灵活性交易机制,并构建市场出清模型。最后通过算例分析验证了所提市场机制的有效性,为“源−网−荷−储”互动模式发展提供借鉴参考。

关键词：能源互联网 "源−网−荷−储"互动多元主体灵活性交易机制

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Parallel Nanoimprint Forming of One-Dimensional Chiral Semiconductor for Strain-Engineered Optical Properties

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Nano-Micro Letters 2020年第11期12卷 242-254页

作者： Yixiu Wang Shengyu Jin Qingxiao Wang Min wu Shukai Yao Peilin Liao Moon JKim Gary JCheng wenzhuo wu School of Industrial Engineering Purdue UniversityWest LafayetteIN 47907USA Flex Laboratory Purdue UniversityWest LafayetteIN 47907USA Department of Materials Science and Engineering University of Texas at DallasRichardsonTX 75080USA School of Materials Engineering Purdue UniversityWest LafayetteIN 47907USA Birck Nanotechnology Center Purdue UniversityWest LafayetteIN 47907USA Regenstrief Center for Healthcare Engineering Purdue UniversityWest LafayetteIN 47907USA

The low-dimensional,highly anisotropic geometries,and superior mechanical properties of one-dimensional(1D) nanomaterials allow the exquisite strain engineering with a broad tunability inaccessible to bulk or thin-film *** capability enables unprecedented possibilities for probing intriguing physics and materials science in the 1-D *** the techniques for introducing controlled strains in 1D materials,nanoimprinting with embossed substrates attracts increased attention due to its capability to parallelly form nanomaterials into wrinkled structures with controlled periodicities,amplitudes,orientations at large scale with nanoscale ***,we systematically investigated the strain-engineered anisotropic optical properties in Te nanowires through introducing a controlled strain field using a resist-free thermally assisted nanoimprinting *** magnitude of induced strains can be tuned by adjusting the imprinting pressure,the nanowire diameter,and the patterns on the *** observed Raman spectra from the chiral-chain lattice of 1D Te reveal the strong lattice vibration response under the *** results suggest the potential of 1D Te as a promising candidate for flexible electronics,deformable optoelectronics,and wearable *** experimental platform can also enable the exquisite mechanical control in other nanomaterials using substrate-induced,on-demand,and controlled strains.

关键词： Chiral semiconductor Nanowires Nanoimprinting Strain engineering Optical property

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Robust Optimization of the Output Voltage of Nanogenerators by Statistical Design of Experiments

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Nano Research 2010年第9期3卷 613-619页

作者： Jinhui Song Huizhi Xie wenzhuo wu V.Roshan Joseph C.F.Jeff wu Zhong Lin Wang School of Materials Science and Engineering Georgia Institute of TechnologyAtlantaGeorgia 30332-0205USA School of Industrial and Systems Engineering Georgia Institute of TechnologyAtlantaGeorgia 30332-0205USA

Nanogenerators were first demonstrated by deflecting aligned ZnO nanowires using a conductive atomic force microscopy(AFM)*** output of a nanogenerator is affected by three parameters:tip normal force,tip scanning speed,and tip *** this work,systematic experimental studies have been carried out to examine the combined effects of these three parameters on the output,using statistical design of experiments.A statistical model has been built to analyze the data and predict the optimal parameter *** an AFM tip of cone angle 70°coated with Pt,and ZnO nanowires with a diameter of 50 nm and lengths of 600 nm to 1μm,the optimized parameters for the nanogenerator were found to be a normal force of 137 nN and scanning speed of 40μm/s,rather than the conventional settings of 120 nN for the normal force and 30μm/s for the scanning speed.A nanogenerator with the optimized settings has three times the average output voltage of one with the conventional settings.

关键词： ZnO nanowire arrays robust parameter design nanogenerator piezoelectric properties

Chitosan biopolymer-derived self-powered triboelectric sensor with optimized performance through molecular surface engineering and data-driven learning

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InfoMat 2019年第1期1卷 116-125页

作者： Chenxiang Ma Shengjie Gao Xinqi Gao Min wu Ruoxing Wang Yixiu Wang Zhiyuan Tang Fengru Fan Wenxuan wu Hong Wan wenzhuo wu School of Industrial Engineering Purdue UniversityWest LafayetteIndiana Department of Applied Chemistry School of Chemical Engineering and TechnologyTianjin UniversityTianjinChina Flex Laboratory Purdue UniversityWest LafayetteIndiana Department of Chemistry and Biochemistry University of CaliforniaSanta BarbaraCalifornia Department of Research&Development Shenzhen Broadthink Advanced Materials Technologies Co.Ltd.ShenzhenGuangdongChina Edward P.Fitts Department of Industrial&Systems Engineering North Carolina State UniversityRaleighNorth Carolina Birck Nanotechnology Center Purdue UniversityWest LafayetteIndiana Regenstrief Center for Healthcare Engineering Purdue UniversityWest LafayetteIndiana

The state-of-the-art triboelectric nanogenerators(TENGs)are constructed with synthetic polymers,curtailing their application prospects and relevance in sustainable *** economically viable transformation and engineering of naturally abundant materials into efficient TENGs for mechanical energy harvesting is meaningful not only for fundamental scientific exploration,but also for addressing societal *** an abundant natural biopolymer,chitosan enables exciting opportunity for low-cost,biodegradable TENG ***,the electrical outputs of chitosan-based TENGs are low compared with the devices built with synthetic ***,we explore the facile molecular surface engineering in chitosan to significantly boost the performance of chitosan-based TENG for enabling the practical applications,for example,self-powered car speed *** molecular surface engineering offers a potentially promising scheme for designing and implementing high-performance biopolymer-based TENGs for selfpowered nanosystems in sustainable *** further explore for the first time the feasibility of data mining approaches to analyze and learn the acquired triboelectric signals from the car speed sensors and predict the relationship between the triboelectric signals and car speed values.

关键词： performance polymer surface

Emerging Devices Based on Two-Dimensional Monolayer Materials for Energy Harvesting

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Research 2019年第1期2019卷 283-298页

作者： Feng Ru Fan wenzhuo wu School of Industrial Engineering Purdue UniversityWest LafayetteIndiana 47907USA Flex Laboratory Purdue UniversityWest LafayetteIndiana 47907USA Birck Nanotechnology Center Purdue UniversityWest LafayetteIndiana 47907USA

Two-dimensional(2-D)materials of atomic thickness have attracted considerable interest due to their excellent electrical,optoelectronic,mechanical,and thermal properties,which make them attractive for electronic devices,sensors,and energy *** the otherwise wasted energy from the ambient environment into electrical power holds promise to address the emerging energy needs,in particular for the portable and wearable *** versatile properties of 2-D materials together with their atomically thin body create diverse possibilities for the conversion of ambient *** present review focuses on the recent key advances in emerging energy-harvesting devices based on monolayer 2-D materials through various mechanisms such as photovoltaic,thermoelectric,piezoelectric,triboelectric,and hydrovoltaic devices,as well as progress for harvesting the osmotic pressure and Wi-Fi wireless *** representative achievements regarding the monolayer heterostructures and hybrid devices are also ***,we provide a discussion of the challenges and opportunities for 2-D monolayer material-based energy-harvesting devices in the development of self-powered electronics and wearable technologies.

关键词： harvesting ambient versatile