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Nacre-inspired MXene-based film for highly sensitive piezoresistive sensing over a broad sensing range

Bio-Design and Manufacturing 2024年第4期7卷 463-475页

作者： Gaofeng Wang Lingxian Meng Xinyi Ji Xuying Liu jiajie liang Shuiren Liu School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001China School of Materials Science and Engineering National Institute for Advanced MaterialsNankai UniversityTianjin 300350China

As the main component of wearable electronic equipment,flexible pressure sensors have attracted wide attention due to their excellent sensitivity and their promise with respect to applications in health monitoring,electronic skin,and human-computer ***,it remains a significant challenge to achieve epidermal sensing over a wide sensing range,with short response/recovery time and featuring seamless conformability to the skin *** is critical since the capture of minute electrophysiological signals is important for health care *** this paper,we report the preparation of a nacre-like MXene/sodium carboxymethyl cellulose(CMC)nanocomposite film with a“brick-and-mortar”interior structure using a vacuum-induced self-assembly *** synergistic behavior of the MXene“brick”and flexible CMC“mortar”contributes to attenuating interlamellar self-stacking and creates numerous variable conductive pathways on the sensing *** resulted in a high sensitivity over a broad pressure range(i.e.,0.03-22.37 kPa:162.13 kPa^(-1);22.37-135.71 kPa:127.88 kPa^(-1);135.71-286.49 kPa:100.58 kPa^(-1)).This sensor also has a low detection limit(0.85 Pa),short response/recovery time(8.58 ms/34.34 ms),and good stability(2000 cycles).Furthermore,we deployed pressure sensors to distinguish among tiny particles,various physiological signals of the human body,space arrays,robot motion monitoring,and other related applications to demonstrate their feasibility for a variety of health and motion monitoring use cases.

关键词： Flexible pressure sensor MXene Bioinspired Physiological signals Interlayer spacing

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基于一种互联网+喷粉加工设备的研制

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湖南工业职业技术学院学报 2024年第2期24卷 6-10,15页

作者：梁季彝梁嘉杰江门职业技术学院智能制造与装备学院广东江门529051 中国民用航空飞行学院航空电子电气学院四川广汉618300

喷粉机采用三菱PLC、触摸屏、无线服务器CMT-SVR-200等组成上下位机控制,通过手机或触屏控制喷粉炉温、喷粉量、流化气量、雾化气量、喷枪清洗气量、高压电流电压的大小等7种加工参数来进行喷粉调试加工。根据不同材质的金属制品喷涂需... 详细信息

喷粉机采用三菱PLC、触摸屏、无线服务器CMT-SVR-200等组成上下位机控制,通过手机或触屏控制喷粉炉温、喷粉量、流化气量、雾化气量、喷枪清洗气量、高压电流电压的大小等7种加工参数来进行喷粉调试加工。根据不同材质的金属制品喷涂需求,最多可预设编辑30种不同产品的组合加工参数,通过触屏或手机输入PLC寄存器中。喷粉加工时,只需选择对应的加工产品参数程序,便可由PLC程序将预设的7种加工参数调出来,提高产品喷涂的工作效率。

关键词：流化气量产品参数程序热喷涂工艺

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Flexible and stretchable electrodes for next generation polymer electronics: a review

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Science China Chemistry 2016年第6期59卷 659-662页

作者： Dustin Chen jiajie liang Qibing Pei Department of Materials Science and Engineering University of California Los Angeles School of Engineering and Applied Science and California Nanosystems Institute

Transparent conductive electrodes play a significant role in the fabrication and development of optoelectronic devices. As next generation optoelectronic devices tend towards mobile and wearable devices, the added attribute of flexibility or stretchability for these electrodes becomes increasingly important. However, mechanical requirements aside, transparent conductive electrodes must still retain high transparency and conductivity, with the metrics for these parameters being compared to the standard, indium tin oxide. In the search to replace indium tin oxide, two materials that have risen to the forefront are carbon nanotubes and silver nanowires due to their high transparency, conductivity, mechanical compliance, and ease of fabrication. This review highlights recent innovations made by our group in electrodes utilizing carbon nanotubes and silver nanowires, in addition to the use of these electrodes in discrete devices and integrated systems.

关键词： transparent conductive electrode carbon nanotube silver nanowire flexible stretchable OLED

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Rupture stress of liquid metal nanoparticles and their applications in stretchable conductors and dielectrics

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npj Flexible Electronics 2021年第1期5卷 87-93页

作者： Yang Liu Xinyi Ji jiajie liang School of Materials Science and Engineering National Institute for Advanced MaterialsNankai UniversityTianjinPR China College of Light Industry Science and Engineering Tianjin University of Science and TechnologyTianjinPR China Key Laboratory of Functional Polymer Materials of Ministry of Education College of ChemistryNankai UniversityTianjinPR China Tianjin Key Laboratory of Metal and Molecule-Based Material Chemistry and Collaborative Innovation Center of Chemical Science and Engineering(Tianjin) Nankai UniversityTianjinPR China

Few works had systematically investigated the relationship between the rupture stress of the oxide shell and the diameter of liquid metal nanoparticles(LMNPs).Here,we fabricated a series of elastomer/LMNPs composites,which were based on various polyurethanes with different shore hardness and LMNPs with different diameters,to systematically study the rupture stress of *** established a reliable and guidable relationship between the stress–strain curves of elastomers with different shore hardness and rupture stress of LMNPs with various diameters by both experiments and numerical *** on this guidance,we can facilely prepare stretchable conductors with remarkable stretchability and conductivity(i.e.,24,130 S·cm^(−1)at 500%strain)and stretchable dielectrics with excellent stretchability and permittivity(i.e.,dielectric constant of 76.8 with 580%strain)through controlling the shore hardness of elastomers and diameter of *** work will facilitate the systematic study of LMNPs and expand their use in stretchable electronics.

关键词： stress diameters rupture

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Correlating the Interfacial Polar-Phase Structure to the Local Chemistry in Ferroelectric Polymer Nanocomposites by Combined Scanning Probe Microscopy

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Nano-Micro Letters 2023年第1期15卷 80-93页

作者： jiajie liang Shaojie Wang Zhen Luo Jing Fu Jun Hu Jinliang He Qi Li State Key Laboratory of Power System Department of Electrical EngineeringTsinghua UniversityBeijing 100084People’s Republic of China

Ferroelectric polymer nanocomposites possess exceptional electric properties with respect to the two otherwise uniform phases,which is commonly attributed to the critical role of the matrix-particle interfacial ***,the structure-property correlation of the interface remains unestablished,and thus,the design of ferroelectric polymer nanocompos-ite has largely relied on the trial-and-error ***,a strategy that combines multi-mode scanning probe microscopy-based electrical charac-terization and nano-infrared spectroscopy is developed to unveil the local structure-property correlation of the interface in ferroelectric polymer *** results show that the type of surface modifiers decorated on the nanoparticles can significantly influence the local polar-phase content and the piezoelectric effect of the polymer matrix surrounding the *** strongly coupled polar-phase content and piezoelectric effect measured directly in the interfacial region as well as the computed bonding energy suggest that the property enhancement originates from the formation of hydrogen bond between the surface modifiers and the ferroelectric *** is also directly detected that the local domain size of the ferroelectric polymer can impact the energy level and distribution of charge traps in the interfacial region and eventually influence the local dielectric strength.

关键词： Interfaces Ferroelectric polymers Nanocomposites Scanning probe microscopy Nano-infrared spectroscopy

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The use of graphene oxide membranes for the softening of hard water

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Science China(Technological Sciences) 2014年第2期57卷 284-287页

作者： liang jiajie HUANG Yi ZHANG Fan ZHANG Yi LI Ning CHEN YongSheng Key Laboratory of Functional Polymer Materials collaborative Innovation Center of Chemical Science and Engineering (Tianjin) Center for Nanoscale Science & Technology Institute of Polymer Chemistry College of Chemistry Nankai University

Strong chemical interactions between the oxygen-containing functional groups on graphene oxide(GO)sheets and the ions of divalent metals were exploited for the softening of hard *** membranes were prepared and evaluated for their ability to absorb Ca2+and Mg2+*** GO membranes can effectively absorb Ca2+ions from hard water;a 1 mg GO membrane can remove as much as 0.05 mg Ca2+*** GO membranes can be regenerated and used repeatedly.

关键词： graphene oxide membranes soften hard water

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Highly Stretchable Shape Memory Self-Soldering Conductive Tape with Reversible Adhesion Switched by Temperature

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Nano-Micro Letters 2021年第8期13卷 152-162页

作者： Mengyan Wang Quan Zhang Yiwen Bo Chunyang Zhang Yiwen Lv Xiang Fu Wen He Xiangqian Fan jiajie liang Yi Huang Rujun Ma Yongsheng Chen School of Materials Science and Engineering National Institute for Advanced MaterialsTianjin Key Lab for Rare Earth Materials and ApplicationsNankai UniversityTongyan Road 38Tianjin 300350People’s Republic of China State Key Laboratory and Institute of Elemento-Organic Chemistry Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer MaterialsCollege of ChemistryNankai UniversityWeijin Road 94Tianjin 300071People’s Republic of China

With practical interest in the future applications of next-generation electronic devices,it is imperative to develop new conductive interconnecting materials appropriate for modern electronic devices to replace traditional rigid solder tin and silver paste of high melting temperature or corrosive solvent ***,we design highly stretchable shape memory self-soldering conductive(SMSC)tape with reversible adhesion switched by temperature,which is composed of silver particles encapsulated by shape memory *** tape has perfect shape and conductivity memory property and anti-fatigue ability even under the strain of 90%.It also exhibits an initial conductivity of 2772 S cm^(−1) and a maximum tensile strain of~100%.The maximum conductivity could be increased to 5446 S cm^(−1) by decreasing the strain to 17%.Meanwhile,SMSC tape can easily realize a heating induced reversible strong-to-weak adhe-sion transition for self-soldering *** combination of stable conductivity,excellent shape memory performance,and temperature-switching reversible adhesion enables SMSC tape to serve two functions of electrode and solder *** provides a new way for conductive interconnecting materials to meet requirements of modern electronic devices in the future.

关键词： Shape memory performance Self-soldering conductive tape Reversible adhesion Stretchable electronics

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Fault Diagnosis Method of Rolling Bearing Based on ESGMD-CC and AFSA-ELM

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Structural Durability & Health Monitoring 2024年第1期18卷 37-54页

作者： jiajie He Fuzheng Liu Xiangyi Geng Xifeng liang Faye Zhang Mingshun Jiang School of Traffic&Transportation Engineering Central South UniversityChangsha410075China Project Management Department CRRC Advanced Composites Co.Ltd.Qingdao266108China School of Control Science and Engineering Shandong UniversityJinan250061China

Incomplete fault signal characteristics and ease of noise contamination are issues with the current rolling bearing early fault diagnostic methods,making it challenging to ensure the fault diagnosis accuracy and reliability.A novel approach integrating enhanced Symplectic geometry mode decomposition with cosine difference limitation and calculus operator(ESGMD-CC)and artificial fish swarm algorithm(AFSA)optimized extreme learning machine(ELM)is proposed in this paper to enhance the extraction capability of fault features and thus improve the accuracy of fault ***,SGMD decomposes the raw vibration signal into multiple Symplectic geometry components(SGCs).Secondly,the iterations are reset by the cosine difference limitation to effectively separate the redundant components from the representative ***,the calculus operator is performed to strengthen weak fault features and make them easier to extract,and the singular value decomposition(SVD)weighted by power spectrum entropy(PSE)can be utilized as the sample feature ***,AFSA iteratively optimized ELM is adopted as the optimized classifier for fault *** superior performance of the proposed method has been validated by various experiments.

关键词： Symplectic geometry mode decomposition calculus operator cosine difference limitation fault diagnosis AFSAELM model

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Growth of Noncentrosymmetric Two-Dimensional Single Crystals

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Precision Chemistry 2024年第7期2卷 330-354页

作者： Guoliang Cui jiajie Qi Zhihua liang Fankai Zeng Xiaowen Zhang Xiaozhi Xu Kaihui Liu Guangdong Basic Research Center of Excellence for Structure and Fundamental Interactions of Matter Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum MaterialsSchool of PhysicsSouth China Normal UniversityGuangzhou 510631China Guangdong−Hong Kong Joint Laboratory of Quantum Matter Frontier Research Institute for PhysicsSouth China Normal UniversityGuangzhou 510631China State Key Laboratory for Mesoscopic Physics Frontiers Science Center for Nano-optoelectronicsSchool of PhysicsPeking UniversityBeijing 100871China Songshan Lake Materials Laboratory Institute of PhysicsChinese Academy of SciencesDongguan 523820China

Among the various two-dimensional(2D)materials,more than 99%of them are ***,since the commonly used substrates are generally centrosymmetric,antiparallel islands are usually inevitable in the growth of noncentrosymmetric 2D materials because of the energetic equivalency of these two kinds of antiparallel islands on centrosymmetric ***,achieving the growth of noncentrosymmetric 2D single crystals has long been a great challenge compared with the centrosymmetric ones like *** this review,we presented the remarkable efforts and progress in the past decade,through precise chemical *** first discussed the great challenge and possible strategies in the growth of noncentrosymmetric 2D single ***,we focused on the advancements made in producing representative noncentrosymmetric 2D single crystals,including hexagonal boron nitride(hBN),transition metal dichalcogenides(TMDs),and other noncentrosymmetric 2D *** last,we summarized and looked forward to future research on the growth of layer-,stacking-,and twist-controlled noncentrosymmetric 2D single crystals and their heterostructures.

关键词： noncentrosymmetric two-dimensional materials single crystals hexagonal boron nitride transition metal dichalcogenides

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Development of a novel dual-functional lateral flow assay for on-site detection of clenbuterol

Development of a novel dual-functional lateral flow assay fo...

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中国化学会第十七届全国有机分析与生物分析学术研讨会

作者： FU Qiangqiang ZHOU Kenan LAN Caifeng liang jiajie SHI Congying TANG Yong Department of Bioengineering Guangdong Province Key Laboratory of Molecular Immunology and Antibody EngineeringJinan University Institute of translational medicine Jinan University

Recently,more sensitive methods for analysis of clenbuterol（CL） are required,because of potential risk and illegal use of CL as a hazard to human *** flow assays（LFAs） have been used as a reliable,rapid,and cost effective on-site screening technique for the simultaneous determination of ***,the available lateral flow assay for CL requires a competitive format,leading to low sensitivity of detection when judged by naked *** this study,we reported a novel dual-functional LFA for monitoring CL in terms of fluorescence-quenching effect of gold nanoparticles（AuNPs）.The most important feature of this novel LFA is its dual function as a fluorescence assay under excitation light,but under natural light as an AuNPs *** is apparent that signal intensity of the T-line is associated with elevated level of *** the "turn on" mode when results observed by naked eyes with excitation light,the sensitivity of detection reached 0.04 ng/***,in "turn off" mode using a traditional AuNPs LFAs,results are determined under natural light,the sensitivity decreased to 5 ng/*** novel LFAs could be used for a variety of small analytes such as pesticides,persistent organic pollutants,explosives,toxins,medicinal and abused drugs,hormones,etc.

关键词： Lateral flow assays Dual-functional Fluorescence quenching Clenbuterol

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