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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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    Nanomotion of bacteria to determine metabolic profile

    S.N.PleskovaE.V.LazarenkoN.A.BezrukovR.N.Kriukov...
    1-9页
    查看更多>>摘要：In addition to their visible motion such as swimming(e.g.,with the help of flagella),bacteria can also exhibit nanomotion that is detectable only with highly sensitive instruments,and this study shows that it is possible to detect bacterial nanomotion using an AFM detection system.The results show that the nanomotion characteristics depend on the bacterial strain,and that nanomotion can be used to sense the metabolic activity of bacteria because the oscillations are sensitive to the food preferences of the bacteria and the type of surrounding medium.
      原文链接:
    • 国家科技期刊平台
    • NETL
    • NSTL
    • 维普
    • 万方数据

    Experiment on inducing apoptosis of melanoma cells by micro-plasma jet

    Hua LiQihao ShiYanhua YangJinghao Qi...
    10-17页
    查看更多>>摘要：As a promising cancer treatment method,cold atmospheric plasma has received widespread attention in recent years.However,previous research has focused more on how to realize and expand the anti-cancer scope of plasma jet.There are also studies on the killing of small-scale cancer cells,but the effects of plasma jet on normal cells and normal cell clusters have been ignored.Therefore,we proposed a 50 pm sized micro-plasma jet device,and used the device to treat melanoma cells(A-375)and human glial cells(HA1800)to evaluate their anti-cancer effects and effects on normal cells.The experimental results show that this kind of micro-plasma jet device can effectively inactivate cancer cells in a short period of time,while having little effect on normal cells.This work provides a certain experimental basis for the application of fine plasma jet to clinically inactivate cancer cells.
      原文链接:
    • 国家科技期刊平台
    • NETL
    • NSTL
    • 维普
    • 万方数据

    Flexible capacitive pressure sensor based on interdigital electrodes with porous microneedle arrays for physiological signal monitoring

    Jiahui XuMinghao WangMinyi JinSiyan Shang...
    18-31页
    查看更多>>摘要：Flexible pressure sensors have many potential applications in the monitoring of physiological signals because of their good biocompatibil-ity and wearability.However,their relatively low sensitivity,linearity,and stability have hindered their large-scale commercial application.Herein,a flexible capacitive pressure sensor based on an interdigital electrode structure with two porous microneedle arrays(MNAs)is pro-posed.The porous substrate that constitutes the MNA is a mixed product of polydimethylsiloxane and NaHCO3.Due to its porous and interdigital structure,the maximum sensitivity(0.07 kPa-1)of a porous MNA-based pressure sensor was found to be seven times higher than that of an imporous MNA pressure sensor,and it was much greater than that of a flat pressure sensor without a porous MNA structure.Finite-element analysis showed that the interdigital MNA structure can greatly increase the strain and improve the sensitivity of the sen-sor.In addition,the porous MNA-based pressure sensor was found to have good stability over 1500 loading cycles as a result of its bilayer parylene-enhanced conductive electrode structure.Most importantly,it was found that the sensor could accurately monitor the motion of a finger,wrist joint,arm,face,abdomen,eye,and Adam's apple.Furthermore,preliminary semantic recognition was achieved by monitoring the movement of the Adam's apple.Finally,multiple pressure sensors were integrated into a 3 × 3 array to detect a spatial pressure distribu-tion.Compared to the sensors reported in previous works,the interdigital electrode structure presented in this work improves sensitivity and stability by modifying the electrode layer rather than the dielectric layer.
      原文链接:
    • 国家科技期刊平台
    • NETL
    • NSTL
    • 维普
    • 万方数据

    Investigation of high-quality-factor aluminum nitride MEMS cantilever resonators

    Shuai ShiQingrui YangYi YuanHaolin Li...
    32-43页
    查看更多>>摘要：This paper presents the design,fabrication,and characterization of cantilever-type resonators with a novel stacked structure.Aluminum nitride is adopted as the material for both the structural layer and the piezoelectric layer;this simplifies the fabrication process and improves the quality factor of the resonator.Both in-plane and out-of-plane flexural modes were investigated.The effect of the structural dimensions and electrode patterns on the resonator's performance were also studied.Finite-element simulations and experiments examining anchor loss and thermoelastic damping,which are the main loss mechanisms affecting the quality factor of these resonators,were carried out.The optimal structural dimensions and electrode patterns of the cantilever-type resonators are presented.A quality factor of 7922 with a motional impedance of 88.52 kΩ and a quality factor of 8851 with a motional impedance of 67.03 kΩ were achieved for the in-plane and out-of-plane flexural-mode resonators,respectively.The proposed resonator design will contribute to the development of high-performance devices such as accelerometers,gyroscopes,and pressure sensors.
      原文链接:
    • 国家科技期刊平台
    • NETL
    • NSTL
    • 维普
    • 万方数据

    Nonlinear phenomena in vibrations of embedded carbon nanotubes conveying viscous fluid

    Reza Ebrahimi
    44-54页
    查看更多>>摘要：Various nonlinear phenomena such as bifurcations and chaos in the responses of carbon nanotubes(CNTs)are recognized as being major contributors to the inaccuracy and instability of nanoscale mechanical systems.Therefore,the main purpose of this paper is to predict the nonlinear dynamic behavior of a CNT conveying viscous fluid and supported on a nonlinear elastic foundation.The proposed model is based on nonlocal Euler-Bernoulli beam theory.The Galerkin method and perturbation analysis are used to discretize the partial differential equation of motion and obtain the frequency-response equation,respectively.A detailed parametric study is reported into how the nonlocal parameter,foundation coefficients,fluid viscosity,and amplitude and frequency of the external force influence the nonlinear dynamics of the system.Subharmonic,quasi-periodic,and chaotic behaviors and hardening nonlinearity are revealed by means of the vibration time histories,frequency-response curves,bifurcation diagrams,phase portraits,power spectra,and Poincaré maps.Also,the results show that it is possible to eliminate irregular motion in the whole range of external force amplitude by selecting appropriate parameters.
      原文链接:
    • 国家科技期刊平台
    • NETL
    • NSTL
    • 维普
    • 万方数据

    True-temperature inversion algorithm for a multi-wavelength pyrometer based on fractional-order particle-swarm optimization

    Mei LiangZhuo SunJiasong LiuYongsheng Wang...
    55-62页
    查看更多>>摘要：Herein,a method of true-temperature inversion for a multi-wavelength pyrometer based on fractional-order particle-swarm optimization is proposed for difficult inversion problems with unknown emissivity.Fractional-order calculus has the inherent advantage of easily jumping out of local extreme values;here,it is introduced into the particle-swarm algorithm to invert the true temperature.An improved adaptive-adjustment mechanism is applied to automatically adjust the current velocity order of the particles and update their velocity and position values,increasing the accuracy of the true temperature values.The results of simulations using the proposed algorithm were compared with three algorithms using typical emissivity models:the internal penalty function algorithm,the optimization function(fmincon)algorithm,and the conventional particle-swarm optimization algorithm.The results show that the proposed algorithm has good accuracy for true-temperature inversion.Actual experimental results from a rocket-motor plume were used to demonstrate that the true-temperature inversion results of this algorithm are in good agreement with the theoretical true-temperature values.
      原文链接:
    • 国家科技期刊平台
    • NETL
    • NSTL
    • 维普
    • 万方数据

    Investigation on photonic crystal nanobeam cavity based on mixed diamond-circular holes

    Jingtong BinKerui FengShang MaKe Liu...
    63-70页
    查看更多>>摘要：A photonic crystal nanobeam cavity(M-PCNC)with a structure incorporating a mixture of diamond-shaped and circular air holes is pro-posed.The performance of the cavity is simulated and studied theoretically.Using the finite-difference time-domain method,the parameters of the M-PCNC,including cavity thickness and width,lattice constant,and radii and numbers of holes,are optimized,with the quality factor Q and mode volume Vm as performance indicators.Mutual modulation of the lattice constant and hole radius enable the proposed M-PCNC to realize outstanding performance.The optimized cavity possesses a high quality factor Q=1.45 × 105 and an ultra-small mode volume Vm=0.01(A/n)[Zeng et al.,Opt Lett 2023:48;3981-3984]in the telecommunications wavelength range.Light can be progres-sively squeezed in both the propagation direction and the perpendicular in-plane direction by a series of interlocked anti-slots and slots in the diamond-shaped hole structure.Thereby,the energy can be confined within a small mode volume to achieve an ultra-high Q/Vm ratio.
      原文链接:
    • 国家科技期刊平台
    • NETL
    • NSTL
    • 万方数据

    Patterning single-layer materials by electrical breakdown using atomic force microscopy

    Yajie YangJiajia LuYanbo XieLibing Duan...
    71-77页
    查看更多>>摘要：The development of nanoelectronics and nanotechnologies has been boosted significantly by the emergence of 2D materials because of their atomic thickness and peculiar properties,and developing a universal,precise patterning technology for single-layer 2D materials is critical for assembling nanodevices.Demonstrated here is a nanomachining technique using electrical breakdown by an AFM tip to fabricate nanopores,nanostrips,and other nanostructures on demand.This can be achieved by voltage scanning or applying a constant voltage while moving the tip.By measuring the electrical current,the formation process on single-layer materials was shown quantitatively.The present results provide evidence of successful pattern fabrication on single-layer MoS2,boron nitride,and graphene,although further confirmation is still needed.The proposed method holds promise as a general nanomachining technology for the future.
      原文链接:
    • 国家科技期刊平台
    • NETL
    • NSTL
    • 维普
    • 万方数据

    Heating of nanoparticles and their environment by laser radiation and applications

    Victor K.Pustovalov
    78-115页
    查看更多>>摘要：This review considers the fundamental dynamic processes involved in the laser heating of metal nanoparticles and their subsequent cooling.Of particular interest are the absorption of laser energy by nanoparticles,the heating of a single nanoparticle or an ensemble thereof,and the dissipation of the energy of nanoparticles due to heat exchange with the environment.The goal is to consider the dependences and values of the temperatures of the nanoparticles and the environment,their time scales,and other parameters that describe these processes.Experimental results and analytical studies on the heating of single metal nanoparticles by laser pulses are discussed,including the laser thresholds for initiating subsequent photothermal processes,how temperature influences the optical properties,and the heating of gold nanoparticles by laser pulses.Experimental studies of the heating of an ensemble of nanoparticles and the results of an analytical study of the heating of an ensemble of nanoparticles and the environment by laser radiation are considered.Nanothermometry methods for nanoparticles under laser heating are considered,including changes in the refractive indices of metals and spectral thermometry of optical scattering of nanoparticles,Raman spectroscopy,the thermal distortion of the refractive index of an environment heated by a nanoparticle,and thermochemical phase transitions in lipid bilayers surrounding a heated nanoparticle.Understanding the sequence of events after radiation absorption and their time scales underlies many applications of nanoparticles.The application fields for the laser heating of nanoparticles are reviewed,including thermochemical reactions and selective nanophotothermolysis initiated in the environment by laser-heated nanoparticles,thermal radiation emission by nanoparticles and laser-induced incandescence,electron and ion emission of heated nanoparticles,and optothermal chemical catalysis.Applications of the laser heating of nanoparticles in laser nanomedicine are of particular interest.Significant emphasis is given to the proposed analytical approaches to modeling and calculating the heating processes under the action of a laser pulse on metal nanoparticles,taking into account the temperature dependences of the parameters.The proposed models can be used to estimate the parameters of lasers and nanoparticles in the various application fields for the laser heating of nanoparticles.
      原文链接:
    • 国家科技期刊平台
    • NETL
    • NSTL
    • 维普
    • 万方数据

    Advances in microfluidic-based DNA methylation analysis

    Jiwen LiTiechuan LiXuexin Duan
    116-134页
    查看更多>>摘要：DNA methylation has been extensively investigated in recent years,not least because of its known relationship with various diseases.Progress in analytical methods can greatly increase the relevance of DNA methylation studies to both clinical medicine and scientific research.Microflu-idic chips are excellent carriers for molecular analysis,and their use can provide improvements from multiple aspects.On-chip molecular analysis has received extensive attention owing to its advantages of portability,high throughput,low cost,and high efficiency.In recent years,the use of novel microfluidic chips for DNA methylation analysis has been widely reported and has shown obvious superiority to conventional methods.In this review,we first focus on DNA methylation and its applications.Then,we discuss advanced microfluidic-based methods for DNA methylation analysis and describe the great progress that has been made in recent years.Finally,we summarize the advantages that microfluidic technology brings to DNA methylation analysis and describe several challenges and perspectives for on-chip DNA methylation analysis.This review should help researchers improve their understanding and make progress in developing microfluidic-based methods for DNA methylation analysis.
      原文链接:
    • 国家科技期刊平台
    • NETL
    • NSTL
    • 维普
    • 万方数据