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纳米技术与精密工程（英文）
纳米技术与精密工程（英文）

胡小唐

双月刊

1672-6030

namijishu@tju.edu.cn

022-27892181

300072

天津市南开区卫津路92号

纳米技术与精密工程（英文）/Journal Nanotechnology and Precision EngineeringCSCD北大核心CSTPCDEI
查看更多>>本刊是纳米技术与精密工程领域专业性学术期刊,主要刊登纳米技术、微机电系统、精密加工和精密测量方面用中、英文撰写的具有创造性的科学研究论文、研究报告以及重要学术问题讨论和综述等.办刊宗旨在于反映国内外该领域及相关领域的重要科学研究成果,促进学术交流和科学技术发展.读者对象为国内外理工科高等院校师生、科研人员和广大工程技术工作者.欢迎国内外作者踊跃投稿.本刊为美国《工程索引》EI和中国科技论文统计源（中国科技核心期刊）收录期刊。
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    Stress distribution variations during nanoindentation failure of hard coatings on silicon substrates

    Ritambhara DashKushal BhattacharyyaArnab S.Bhattacharyya
    1-10页
    查看更多>>摘要：Regarding quality inspection of technologically important nanocomposite hard coatings based on Ti,B,Si,C,and N and bioceramics such as hydroxyapatite that are used in small-scale high-precision devices and bio-implants,it is essential to study the failure mechanisms associated with nanoindentation,such as fracture,delamination,and chipping.The stress imposed by the indenter can affect the fracture morphology and the interfacial fracture energy,depending on indenter shape,substrate type,crystallographic properties,pre-existing flaws,internal micro-cracks,and pre-strain.Reported here are finite-element-based fracture studies that provide insights into the different cracking mechanisms related to the aforementioned failure process,showing that the fracture morphology is affected by the interaction of different cracking events.The interfacial fracture energy,toughness,and residual stress are calculated using existing models with minor adjustments,and it is found that increasing the indenter sharpness improves the shear stress distribution,making the coating more prone to separation.Depending on the prevailing type of stress,the stress distribution beneath the depression results in either crack formation or a dislocation pile-up leading to strain hardening.Different forms of resistances resulting from the indentation process are found to affect the tip-sample conduction,and because of its stronger induced plasticity than that of a Berkovich indenter tip,a sharper cube-corner tip produces more resistance.
      原文链接:
    • NETL
    • NSTL
    • 万方数据
    • 维普

    Electrode design for multimode suppression of aluminum nitride tuning fork resonators

    Yi YuanQingrui YangHaolin LiShuai Shi...
    11-21页
    查看更多>>摘要：This paper is focused on electrode design for piezoelectric tuning fork resonators.The relationship between the performance and electrode pattern of aluminum nitride piezoelectric tuning fork resonators vibrating in the in-plane flexural mode is investigated based on a set of resonators with different electrode lengths,widths,and ratios.Experimental and simulation results show that the electrode design impacts greatly the multimode effect induced from torsional modes but has little influence on other loss mechanisms.Optimizing the electrode design suppresses the torsional mode successfully,thereby increasing the ratio of impedance at parallel and series resonant frequencies(Rp/Rs)by more than 80％and achieving a quality factor(Q)of 7753,an effective electromechanical coupling coefficient(kteff2)of 0.066％,and an impedance at series resonant frequency(Rm)of 23.6 kΩ.The proposed approach shows great potential for high-performance piezoelectric resonators,which are likely to be fundamental building blocks for sensors with high sensitivity and low noise and power consumption.
      原文链接:
    • NETL
    • NSTL
    • 万方数据
    • 维普

    Effects of simulated zero gravity on adhesion,cell structure,proliferation,and growth behavior,in glioblastoma multiforme

    Saifaldeen AltaieAmera Alrawi
    22-29页
    查看更多>>摘要：All life on Earth has evolved under the influence of continuous gravity,and methods have been developed to balance this influence with the biological evolution of organisms at the cellular and system levels.However,when exposed to zero gravity in space,the balance between cell structure and external forces is destroyed,resulting in changes at the cellular level(e.g.,cell morphology,adhesion,viability,apoptosis,etc.),and understanding the molecular mechanism of cell response to zero gravity will help to cope with diseases that rely on mechanical response.Therefore,biological research in space and zero gravity is a unique step in developing the best anti-cancer treatments,which is a great challenge to humanity.In this study,multicellular glioma cancer cells from a brain tumor in a 72-year-old Iraqi patient were subjected to simulated zero gravity for 24 h,and the results showed that most of the cells lost their adhesion,which is considered to be the first step toward cell apoptosis.In addition to the formation of multicellular spheroids,the results also showed that the inhibition rate for cell death was 32％in comparison to the control cells.Moreover,the cells showed a clear change in their cellular morphology and growth behavior.These results give new hope for fighting cancer distinctively,and such a treatment method has no side effects in comparison to traditional chemical and radiological ones.
      原文链接:
    • NETL
    • NSTL
    • 万方数据
    • 维普

    Design and analysis of longitudinal-flexural hybrid transducer for ultrasonic peen forming

    Wuqin LiYongyong ZhuXiaolong LuHuafeng Li...
    30-39页
    查看更多>>摘要：Ultrasonic peen forming(UPF)is an emerging technology that exhibits great superiority in both its flexible operating modes and the deep residual stress that it produces compared with conventional plastic forming methods.Although ultrasonic transducers with longitudinal vibration have been widely studied,they have seldom been incorporated into UPF devices for machining in confined spaces.To meet the requirements of this type of machining,a sandwich-type piezoelectric transducer with coupled longitudinal-flexural vibrational modes is pro-posed.The basic structure of the transducer is designed to obtain large vibrational amplitudes in both modes.Experimental results obtained with a prototype device demonstrate the feasibility of the proposed transducer.The measured vibrational amplitude for the working face in the longitudinal vibrational mode is 1.0 μm,and electrical matching increases this amplitude by 40％.The flexural vibration characteristics of the same prototype transducer are also tested and are found to be slightly smaller than those of longitudinal mode.The resultant work-ing strokes of the UPF impact pins reach 1.7 mm and 1.2 mm in the longitudinal and flexural modes,respectively.The forming capability of the prototype has been evaluated via 15-min machining on standard 2024-T351 aluminum plates.After UPF,an improved surface mor-phology with lower surface roughness is obtained.The aluminum plate test piece has an apparent upper deformation with an arc height of 0.64 mm.The measured peak value of the compressive residual stress is around 250 MPa,appearing at a depth of 100 μm.The proposed longitudinal-flexural hybrid transducer thus provides a high-performance tool for plate peen forming in confined spaces.
      原文链接:
    • NETL
    • NSTL
    • 万方数据

    An advanced cost-efficient IoT method for stroke rehabilitation using smart gloves

    A.ArivarasiD.ThiripurasundariA.Arockia SelvakumarBhuvan Kumaar...
    40-54页
    查看更多>>摘要：Stroke represents a severe,widespread,and widely acknowledged health crisis on both national and international levels.It is one of the most prevalent life-threatening conditions.Despite impressive advances in treating stroke,in addition to a need for effective patient care services,many sufferers still rely solely on physical interventions.The present paper describes and explains the use of a newly designed gadget for stroke survivors who cannot move their fingers.This is a sophisticated mobile device that enables stroke patients to regain their muscle memory and thus their ability to perform repetitive actions by continuing to tighten and stretch their muscles without the intervention of a physiotherapist.Gamification methodology is used to encourage patients to become involved in the process of rehabilitation.The device also has sensors that take information and transmit it to an app through an ESP32 connection.This enables physicians to view glove usage information remotely and keep track of an individual patient's health.Communication between app and glove is facilitated by a broker in the Amazon Web Service IoT.With the robotic glove presented here,the recovery rate is found to be 90.23％over four weeks'duration,which represents a significant improvement compared with existing hospital-based rehabilitation techniques.
      原文链接:
    • NETL
    • NSTL
    • 万方数据
    • 维普

    Electrical characterization of an individual nanowire using flexible nanoprobes fabricated by atomic force microscopy-based manipulation

    Yilin WangEnxiu WuJirui LiuMengke Jia...
    55-65页
    查看更多>>摘要：Nano wires have emerged as promising one-dimensional materials with which to construct various nanocircuits and nanosensors.How-ever,measuring the electrical properties of individual nanowires directly remains challenging because of their small size,thereby hindering the comprehensive understanding of nanowire-based device performance.A crucial factor in achieving reliable electrical characterization is establishing well-determined contact conditions between the nanowire sample and the electrodes,which becomes particularly difficult for soft nanowires.Introduced here is a novel technique for measuring the conductivity of an individual nanowire with the aid of automated nanomanipulation using an atomic force microscope.In this method,two nanowire segments cut from the same silver nanowire are posi-tioned onto a pair of gold electrodes,serving as flexible nanoprobes to establish controllable contact with the sample.By changing the contact points along the nanowire sample,conductivity measurements can be performed on different regions,thereby eliminating the influence of contact resistance by analyzing multiple current-voltage curves.Using this approach,the resistivity of a 100-nm-diameter silver nanowire is determined to be 3.49 × 10-8 Ω m.
      原文链接:
    • NETL
    • NSTL
    • 万方数据
    • 维普

    An image mosaic technique with non-overlapping regions based on microscopic vision in precision assembly

    Yawei LiXiaodong WangTao WangYi Luo...
    66-74页
    查看更多>>摘要：Microscopic vision has been widely applied in precision assembly.To achieve sufficiently high resolution in measurements for precision assembly when the sizes of the parts involved exceed the field of view of the vision system,an image mosaic technique must be used.In this paper,a method for constructing an image mosaic with non-overlapping areas with enhanced efficiency is proposed.First,an image mosaic model for the part is created using a geometric model of the measurement system installed on a X-Y-Z precision stages with high repeatability,and a path for image acquisition is established.Second,images are captured along the same path for a specified calibration plate,and an entire image is formed based on the given model.The measurement results obtained from the specified calibration plate are utilized to identify mosaic errors and apply compensation for the part requiring measurement.Experimental results show that the maximum error is less than 4 μm for a camera with pixel equivalent 2.46 μm,thereby demonstrating the accuracy of the proposed method.This image mosaic technique with non-overlapping regions can simplify image acquisition and reduce the workload involved in constructing an image mosaic.
      原文链接:
    • NETL
    • NSTL
    • 万方数据
    • 维普

    Smart epidermal electrophysiological electrodes:Materials,structures,and algorithms

    Yuanming YeHaochao WangYanqiu TianKunpeng Gao...
    75-97页
    查看更多>>摘要：Epidermal electrophysiological monitoring has garnered significant attention for its potential in medical diagnosis and healthcare,particularly in continuous signal recording.However,simultaneously satisfying skin compliance,mechanical properties,environmental adaptation,and biocompatibility to avoid signal attenuation and motion artifacts is challenging,and accurate physiological feature extraction necessitates effective signal-processing algorithms.This review presents the latest advancements in smart electrodes for epidermal electrophysiological monitoring,focusing on materials,structures,and algorithms.First,smart materials incorporating self-adhesion,self-healing,and self-sensing functions offer promising solutions for long-term monitoring.Second,smart meso-structures,together with micro/nanostructures endowed the electrodes with self-adaption and multifunctionality.Third,intelligent algorithms give smart electrodes a"soul,"facilitating faster and more-accurate identification of required information via automatic processing of collected electrical signals.Finally,the existing challenges and future opportunities for developing smart electrodes are discussed.Recognized as a crucial direction for next-generation epidermal electrodes,intelligence holds the potential for extensive,effective,and transformative applications in the future.
      原文链接:
    • NETL
    • NSTL
    • 万方数据
    • 维普

    Nanostructure enabled extracellular vesicles separation and detection

    Xinyuan HeWei WeiXuexin Duan
    98-120页
    查看更多>>摘要：Extracellular vesicles(EVs)have recently attracted significant research attention owing to their important biological functions,including cell-to-cell communication.EVs are a type of membrane vesicles that are secreted into the extracellular space by most types of cells.Several biological biomolecules found in EVs,such as proteins,microRNA,and DNA,are closely related to the pathogenesis of human malignancies,making EVs valuable biomarkers for disease diagnosis,treatment,and prognosis.Therefore,EV separation and detection are prerequisites for providing important information for clinical research.Conventional separation methods suffer from low levels of purity,as well as the need for cumbersome and prolonged operations.Moreover,detection methods require trained operators and present challenges such as high opera-tional expenses and low sensitivity and specificity.In the past decade,platforms for EV separation and detection based on nanostructures have emerged.This article reviews recent advances in nanostructure-based EV separation and detection techniques.First,nanostructures based on membranes,nanowires,nanoscale deterministic lateral displacement,and surface modification are presented.Second,high-throughput sep-aration of EVs based on nanostructures combined with acoustic and electric fields is described.Third,techniques combining nanostructures with immunofluorescence,surface plasmon resonance,surface-enhanced Raman scattering,electrochemical detection,or piezoelectric sen-sors for high-precision EV analysis are summarized.Finally,the potential of nanostructures to detect individual EVs is explored,with the aim of providing insights into the further development of nanostructure-based EV separation and detection techniques.
      原文链接:
    • NETL
    • NSTL
    • 万方数据
    • 维普