aaaselect * from OA left join Issue on OA.Issue_No=Issue.Issue_No left join Iuuse_Year on Issue.Issue_Year=Iuuse_Year.Issue_Year where OA.Issue_No='2019年1期' order by Page_Num 纳米技术与精密工程 /nm/oa <span class="fontstyle0"> <span style="FONT-SIZE: 10pt; COLOR: #666666">Investigation of the performance of a pilot-scale barrel atmospheric plasma system for plasma activation of polymer particles</span> </span> /nm/oa/darticle.aspx?type=view&id=2019101 This study reports the development and performance of a pilot-scale barrel atmospheric plasma reactor for the atmospheric plasma activation treatment of polymer particles. The polymer particles treated included acrylonitrile butadiene styrene (ABS) and polypropylene (PP). These particles had diameters in the range of 3–5 mm. The initial studies were carried out using a laboratory-scale barrel reactor designed to treat polymer particle batch sizes of 20 g. A pilot-scale reactor that could treat 500 g particle batch sizes was then developed to facilitate pre-industrial-scale treatments. The effect of operating pulse density modulation (PDM) in the range 10%–100% and plasma treatment time on the level of activation of the treated polymers were then investigated. ABS revealed a larger decrease in water contact angle compared with PP after plasma treatment under the same conditions. The optimal treatment time of ABS (400 g of polymer particles) in the pilot-scale reactor was 15 min. The plasma-activated polymer particles were used to fabricate dog-bone polymer parts through injection molding. Mechanical testing of the resulting dog-bone polymer parts revealed a 10.5% increase in tensile strength compared with those fabricated using non-activated polymer particles. 2019年03月15 00:00 2019年1期 1 7 2391863 <span style="COLOR: #242021">Hisham M. Abourayana a , Peter J. Dobbyn a , Pat Whyte b , Denis P. Dowling a,*</span> Enhancement of surface wettability via micro- and nanostructures by single point diamond turning /nm/oa/darticle.aspx?type=view&id=2019102 Studies on surface wettability have received tremendous interest due to their potential applications in research and industrial processes. One of the strategies to tune surface wettability is modifying surface topography at micro- and nanoscales. In this research, periodic micro- and nanostructures were patterned on several polymer surfaces by ultra-precision single point diamond turning to investigate the relationships between surface topographies at the micro- and nanoscales and their surface wettability. This research revealed that single-point diamond turning could be used to enhance the wettability of a variety of polymers, including polyvinyl chloride (PVC), polyethylene 1000 (PE1000), polypropylene copolymer (PP) and polytetrafluoroethylene (PFTE), which cannot be processed by conventional semiconductor-based manufacturing processes. Materials exhibiting common wettability properties (θ ≈ 90°) changed to exhibit “superhydrophobic” behavior (θ ? 150°). Compared with the size of the structures, the aspect ratio of the void space between micro- and nanostructures has a strong impact on surface wettability. 2019年03月15 00:00 2019年1期 8 14 2020873 Nicolás Cabezudo a, Jining Sun a,*, Behnam Andi a, Fei Ding b, Ding Wang c, Wenlong Chang b, Xichun Luo b, Ben B. Xu c Theoretical and experimental characterizations of gigahertz acoustic streaming in microscale fluids /nm/oa/darticle.aspx?type=view&id=2019103 <span style="FONT-SIZE: 8pt"> <span style="COLOR: #242021"> <span class="fontstyle0">Even as gigahertz (GHz) acoustic streaming has developed into a multi-functional platform technology for biochemical applications, including ultrafast micro</span> <span class="fontstyle2">fl</span> </span> </span> <span class="fontstyle0"> <span style="FONT-SIZE: 8pt; COLOR: #242021">uidic mixing, microparticle operations, and cellar or vesicle surgery, its theoretical principles have yet to be established. This is because few studies have been conducted on the </span> <span style="FONT-SIZE: 8pt; COLOR: #242021">use of such high frequency acoustics in microscale </span> </span> <span style="FONT-SIZE: 8pt"> <span style="COLOR: #242021"> <span class="fontstyle2">fl</span> <span class="fontstyle0">uids. Another dif</span> <span class="fontstyle2">fi</span> </span> </span> <span class="fontstyle0"> <span style="FONT-SIZE: 8pt; COLOR: #242021">culty is the lack of velocimetry methods for </span> <span style="FONT-SIZE: 8pt; COLOR: #242021">microscale and nanoscale </span> </span> <span class="fontstyle2"> <span style="FONT-SIZE: 8pt; COLOR: #242021">fl</span> </span> <span class="fontstyle0"> <span style="FONT-SIZE: 8pt; COLOR: #242021">uidic streaming. In this work, we focus on the basic aspects of GHz acoustic streaming, </span> <span style="FONT-SIZE: 8pt; COLOR: #242021">including its micro-vortex generation principles, theoretical model, and experimental characterization technologies. We present details of a weak-coupled </span> </span> <span class="fontstyle2"> <span style="FONT-SIZE: 8pt; COLOR: #242021">fi</span> </span> <span class="fontstyle0"> <span style="FONT-SIZE: 8pt; COLOR: #242021">nite simulation that represents our current understanding of the </span> <span style="FONT-SIZE: 8pt; COLOR: #242021">GHz-acoustic-streaming phenomenon. Both our simulation and experimental results show that the GHzacoustic-induced interfacial body force plays a determinative role in vortex generation. We carefully studied changes in the formation of GHz acoustic streaming at different acoustic powers and </span> </span> <span class="fontstyle2"> <span style="FONT-SIZE: 8pt; COLOR: #242021">fl</span> </span> <span class="fontstyle0"> <span style="FONT-SIZE: 8pt; COLOR: #242021">ow rates. In particular, </span> <span style="FONT-SIZE: 8pt; COLOR: #242021">we developed a micro</span> </span> <span style="FONT-SIZE: 8pt"> <span style="COLOR: #242021"> <span class="fontstyle2">fl</span> <span class="fontstyle0">uidic-particle-image velocimetry method that enables the quanti</span> <span class="fontstyle2">fi</span> </span> </span> <span class="fontstyle0"> <span style="FONT-SIZE: 8pt; COLOR: #242021">cation of streaming </span> <span style="FONT-SIZE: 8pt; COLOR: #242021">at the microscale and even nanoscale. This work provides a full map of GHz acousto</span> </span> <span class="fontstyle2"> <span style="FONT-SIZE: 8pt; COLOR: #242021">fl</span> </span> <span class="fontstyle0"> <span style="FONT-SIZE: 8pt; COLOR: #242021">uidics and highlights the </span> <span style="FONT-SIZE: 8pt; COLOR: #242021">way to further theoretical study of this topic.</span> </span> 2019年03月15 00:00 2019年1期 15 22 4734053 Weiwei Cui, Wei Pang, Yang Yang, Tiechuan Li, Xuexin Duan * Characterization of machine tools and measurement system for micromilling /nm/oa/darticle.aspx?type=view&id=2019104 <span class="fontstyle0"> <span style="FONT-SIZE: 8pt; COLOR: #242021">Technological progress has led to increased demand for small components with tiny features, which cannot be </span> <span style="FONT-SIZE: 8pt; COLOR: #242021">achieved through conventional machining. Industrial application of processes based on microcutting is limited by some issues concerning the geometrical scale. The process performance is signi</span> </span> <span style="FONT-SIZE: 8pt"> <span style="COLOR: #242021"> <span class="fontstyle2">fi</span> <span class="fontstyle0">cantly affected by milling machine, tool holder, tool, workpiece material microstructure, workpiece </span><span class="fontstyle2">fi</span> </span> </span> <span class="fontstyle0"> <span style="FONT-SIZE: 8pt; COLOR: #242021">xtures, and process parameters. At present, an ultimate micromachining assessment procedure is not available. This study aims to propose and conduct </span> <span style="FONT-SIZE: 8pt; COLOR: #242021">an experiment on a testing procedure for micromilling. The set up to be implemented and the output to be considered are de</span> </span> <span style="FONT-SIZE: 8pt"> <span style="COLOR: #242021"> <span class="fontstyle2">fi</span> <span class="fontstyle0">ned and described. Three major stages are identi</span> <span class="fontstyle2">fi</span> </span> </span> <span class="fontstyle0"> <span style="FONT-SIZE: 8pt; COLOR: #242021">ed: estimation of the effective bandwidth of the </span> <span style="FONT-SIZE: 8pt; COLOR: #242021">load cell</span> </span> <span style="FONT-SIZE: 8pt"> <span style="COLOR: #242021"> <span class="fontstyle3">–</span> <span class="fontstyle0">tool holder system, the milling machine natural frequency measurement, and micromilling test execution. The entire procedure is performed, and its robustness is demonstrated.</span> </span> </span> 2019年03月15 00:00 2019年1期 23 28 5120158 Andrea Abeni *, Matteo Lancini, Aldo Attansio Tailoring metallic surface properties induced by laser surface processing for industrial applications /nm/oa/darticle.aspx?type=view&id=2019105 <span class="fontstyle0"> <span style="FONT-SIZE: 8pt; COLOR: #242021">As a simple, reproducible, and pollution-free technique with the potential of integration and automation, laser </span> <span style="FONT-SIZE: 8pt; COLOR: #242021">processing has attracted increasing attention. Laser processing, which includes laser polishing, laser cleaning, and fabrication of laser-induced micro-/nano-structures, has been demonstrated to yield smooth, clean, functional surfaces and effective joining. Laser polishing is an advanced, highly ef</span> </span> <span class="fontstyle2"> <span style="FONT-SIZE: 8pt; COLOR: #242021">fi</span> </span> <span class="fontstyle0"> <span style="FONT-SIZE: 8pt; COLOR: #242021">cient, and ecofriendly polishing </span> <span style="FONT-SIZE: 8pt; COLOR: #242021">technology. This study demonstrated the laser polishing of a selective laser-melted Inconel 718 (IN718) superalloy and a titanium alloy sample. The surface roughnesses </span> </span> <span style="COLOR: #242021"> <span class="fontstyle3"> <span style="FONT-SIZE: 8pt">R</span> </span> <span class="fontstyle0" style="FONT-SIZE: 5pt">a </span> <span style="FONT-SIZE: 8pt"> <span class="fontstyle0">and </span> <span class="fontstyle3">R</span> </span> <span class="fontstyle0" style="FONT-SIZE: 5pt">z </span> <span style="FONT-SIZE: 8pt"> <span class="fontstyle0">of the IN718 superalloy were respectively reduced from 8 and 33 </span> <span class="fontstyle4">μ</span> <span class="fontstyle0">m to 0.2 and 0.8 </span><span class="fontstyle4">μ</span> <span class="fontstyle0">m, and the </span><span class="fontstyle3">R</span> </span> <span class="fontstyle0" style="FONT-SIZE: 5pt">a </span> <span style="FONT-SIZE: 8pt"> <span class="fontstyle0">of the titanium alloy was reduced from 9.8 </span> <span class="fontstyle4">μ</span> <span class="fontstyle0">m to 0.2 </span><span class="fontstyle4">μ</span> </span> </span> <span class="fontstyle0"> <span style="FONT-SIZE: 8pt; COLOR: #242021">m. </span> <span style="FONT-SIZE: 8pt; COLOR: #242021">Moreover, the wear resistance and corrosion resistance of the IN718 were apparently improved. As another surface-related processing method, laser cleaning was used to clean terminal blocks. Almost all the contaminants were removed, as veri</span> </span> <span class="fontstyle2"> <span style="FONT-SIZE: 8pt; COLOR: #242021">fi</span> </span> <span class="fontstyle0"> <span style="FONT-SIZE: 8pt; COLOR: #242021">ed by the absence of their chemical compositions and the decreased surface roughness. In </span> <span style="FONT-SIZE: 8pt; COLOR: #242021">addition, a superhydrophobic surface with a contact angle of over 160° and sliding angle of </span> </span> <span class="fontstyle5"> <span style="FONT-SIZE: 8pt; COLOR: #242021">b</span> </span> <span class="fontstyle0"> <span style="FONT-SIZE: 8pt; COLOR: #242021">8° on stainless steel </span> <span style="FONT-SIZE: 8pt; COLOR: #242021">was obtained by laser texturing treatment. These results demonstrate the high potential of laser processing in the scienti</span> </span> <span style="FONT-SIZE: 8pt"> <span style="COLOR: #242021"> <span class="fontstyle2">fi</span> <span class="fontstyle0">c, technological, and industrial </span><span class="fontstyle2">fi</span> <span class="fontstyle0">elds.</span> </span> </span> 2019年03月15 00:00 2019年1期 29 34 5004669 Guoqing Hu a,b, Yang Song a, Yingchun Guan b,c,* Surface-enhanced Raman scattering on nanodiamond-derived carbon onions /nm/oa/darticle.aspx?type=view&id=2019106 <span class="fontstyle0"> <span style="FONT-SIZE: 8pt; COLOR: #242021">Annealing nanodiamonds (ND) at high temperatures up to 1700 °C is a common method to synthesize carbon </span> <span style="FONT-SIZE: 8pt; COLOR: #242021">onions. The transformation from NDs to carbon onions is particularly interesting because of carbon onions’ potential in the </span> </span> <span class="fontstyle2"> <span style="FONT-SIZE: 8pt; COLOR: #242021">fi</span> </span> <span class="fontstyle0"> <span style="FONT-SIZE: 8pt; COLOR: #242021">eld of tribology and their application in ultra-charge/discharge devices. In this paper, a novel </span> <span style="FONT-SIZE: 8pt; COLOR: #242021">surface-enhanced Raman scattering technique that involves coating the sample with nanoscopic gold particles is proposed to characterize the NDs after different annealing treatments. Conventional Raman and surfaceenhanced Raman spectra were obtained, and the changes of peak parameters as the function of annealing temperature were evaluated. It was found that the widths of the D and the G peaks decreased with increasing annealing temperature, re</span> </span> <span style="COLOR: #242021"> <span style="FONT-SIZE: 8pt"> <span class="fontstyle2">fl</span> <span class="fontstyle0">ecting an improved order in the sp</span> </span> <span class="fontstyle0" style="FONT-SIZE: 5pt">2</span> </span> <span class="fontstyle0"> <span style="FONT-SIZE: 8pt; COLOR: #242021">-hybridized carbon during the transformation from NDs </span> <span style="FONT-SIZE: 8pt; COLOR: #242021">to carbon onions. After annealing at 1700 °C, the sp</span> </span> <span style="COLOR: #242021"> <span class="fontstyle0" style="FONT-SIZE: 5pt">2</span> <span class="fontstyle3"><span style="FONT-SIZE: 8pt">?</span> </span></span> <span class="fontstyle0"> <span style="FONT-SIZE: 8pt; COLOR: #242021">carbon was highly ordered, indicating desirable electrical<br /></span> <span style="FONT-SIZE: 8pt; COLOR: #242021">conductivity and lubricity. With increasing annealing temperature, the D peak showed a blue shift of almost30 cm</span> </span> <span style="COLOR: #242021"> <span class="fontstyle4"> <span style="FONT-SIZE: 8pt">-</span> </span> <span class="fontstyle0" style="FONT-SIZE: 5pt">1</span> <span style="FONT-SIZE: 8pt"><span class="fontstyle0">, while the G peak merely shifted by 5 cm</span> <span class="fontstyle4">-</span> </span><span class="fontstyle0" style="FONT-SIZE: 5pt">1</span> </span> <span class="fontstyle0"> <span style="FONT-SIZE: 8pt; COLOR: #242021">. For annealing temperatures above 1100 °C, an increase </span> <span style="FONT-SIZE: 8pt; COLOR: #242021">of intensity ratio </span> </span> <span style="COLOR: #242021"> <span class="fontstyle5"> <span style="FONT-SIZE: 8pt">I</span> </span> <span class="fontstyle0" style="FONT-SIZE: 5pt">D</span> <span style="FONT-SIZE: 8pt"><span class="fontstyle0">/</span> <span class="fontstyle5">I</span> </span><span class="fontstyle0" style="FONT-SIZE: 5pt">G </span><span style="FONT-SIZE: 8pt"><span class="fontstyle0">was observed. Compared to the uncoated area, red shifts of 0.5</span> <span class="fontstyle3">–</span> <span class="fontstyle0">2 cm</span> <span class="fontstyle4">-</span> </span><span class="fontstyle0" style="FONT-SIZE: 5pt">1 </span><span style="FONT-SIZE: 8pt"><span class="fontstyle0">and of 5</span> <span class="fontstyle3">–</span> <span class="fontstyle0">9 cm</span> <span class="fontstyle4">-</span> </span></span> <span class="fontstyle0" style="FONT-SIZE: 5pt"> <span style="COLOR: #242021">1 </span> </span> <span class="fontstyle0"> <span style="FONT-SIZE: 8pt; COLOR: #242021">or the G and D peaks, respectively, were detected for the gold-coated area, which was due to the coupling of </span> <span style="FONT-SIZE: 8pt; COLOR: #242021">the plasmons and the phonons of the samples.</span> </span> 2019年03月15 00:00 2019年1期 35 39 6209095 Ying Song a, Zongwei Xu a,*, Andreas Rosenkranz b,*, Mathias Rommel c, Changkun Shi a, Fengzhou Fang a Structure optimization of connection frames based on frequency sensitivity in macro-micro motion platforms /nm/oa/darticle.aspx?type=view&id=2019107 <span style="FONT-SIZE: 8pt"> <span style="COLOR: #242021"> <span class="fontstyle0">High-performance connection frames are of great signi</span> <span class="fontstyle2">fi</span> <span class="fontstyle0">cance for ultra-high acceleration and ultra-precision positioning in macro-micro motion platforms. This paper </span><span class="fontstyle2">fi</span> </span> </span> <span class="fontstyle0"> <span style="FONT-SIZE: 8pt; COLOR: #242021">rst takes the connection frame as a research object, </span> <span style="FONT-SIZE: 8pt; COLOR: #242021">builds a </span> </span> <span style="FONT-SIZE: 8pt"> <span style="COLOR: #242021"> <span class="fontstyle2">fi</span> <span class="fontstyle0">nite element model (FEM) of the natural frequency of the frame, and then veri</span> <span class="fontstyle2">fi</span> </span> </span> <span class="fontstyle0"> <span style="FONT-SIZE: 8pt; COLOR: #242021">es the correctness of </span> <span style="FONT-SIZE: 8pt; COLOR: #242021">this model. The frequency sensitivity method is then used to perturb the structural parameters of the FEM of the connection frame, and the sensitivities of the </span> </span> <span class="fontstyle2"> <span style="FONT-SIZE: 8pt; COLOR: #242021">fi</span> </span> <span class="fontstyle0"> <span style="FONT-SIZE: 8pt; COLOR: #242021">rst-order natural frequency and mass of the corresponding </span> <span style="FONT-SIZE: 8pt; COLOR: #242021">structural parameters are obtained by calculation and analysis. The design variables are also determined. The natural frequency is used as the optimization objective, and the design parameters and mass of the connection frame are constrained. The structural parameters of the connecting frame are obtained through optimization, and the model is built and veri</span> </span> <span style="FONT-SIZE: 8pt"> <span style="COLOR: #242021"> <span class="fontstyle2">fi</span> <span class="fontstyle0">ed by experiments. The results show that the </span><span class="fontstyle2">fi</span> </span> </span> <span class="fontstyle0"> <span style="FONT-SIZE: 8pt; COLOR: #242021">rst-order natural frequency of the </span> <span style="FONT-SIZE: 8pt; COLOR: #242021">connecting frame is effectively improved by the frequency sensitivity method, avoids resonance between the connecting frame and the voice coil motor, and realizes the lightweight design of the connection frame. This research provides a reliable basis for the stable operation and ultra-precision positioning of ultra-high acceleration macro-motion platforms.</span> </span> 2019年03月15 00:00 2019年1期 40 47 3645862 Lufan Zhang a,c,*, Xueli Li b, Haihong Zhang a, Haixin Li a, Hu Li c, Jun Wu c