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学者姓名:杨树明
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Abstract :
The liquid phase exfoliation (LPE) of layered black phosphorus (BP) material is essential in the field of electronics. N-Methyl-2-pyrrolidone (NMP) is one of the most promising precursors for obtaining BP nanosheets/nanoparticles, but the longer sonication time leads to smaller production of phosphorene. Herein, for the first time, the large lateral size fabrication of phosphorene was attained through NMP solvent by optimizing the process parameters. The resultant dispersions were characterized by atomic force microscopy, X-ray powder diffraction, Raman spectroscopy, scanning electron microscopy, transmission electron microscopy, and ultraviolet-visible spectroscopy. The characterization results revealed that the average lateral sizes of BP nanoparticles were found to be 67.8 +/- 18.6 nm and the lateral size of fabricated BP nanosheets was found to be 5.37 mu m. Moreover, this research provides a strategic approach for the mass production of phosphorene for photodetection applications.
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GB/T 7714 | Sarwar, Haris , Ji, Peirui , Shafique, Shareen et al. Production of high-quality and large lateral-size black phosphorus nanoparticles/nanosheets by liquid-phase exfoliation [J]. | RSC ADVANCES , 2023 , 13 (2) : 1223-1228 . |
MLA | Sarwar, Haris et al. "Production of high-quality and large lateral-size black phosphorus nanoparticles/nanosheets by liquid-phase exfoliation" . | RSC ADVANCES 13 . 2 (2023) : 1223-1228 . |
APA | Sarwar, Haris , Ji, Peirui , Shafique, Shareen , Wang, Xiaomin , Yang, Shuming . Production of high-quality and large lateral-size black phosphorus nanoparticles/nanosheets by liquid-phase exfoliation . | RSC ADVANCES , 2023 , 13 (2) , 1223-1228 . |
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Abstract :
Vision-based three-dimensional (3D) shape measurement techniques have been widely applied over the past decades in numerous applications due to their characteristics of high precision, high efficiency and non-contact. Recently, great advances in computing devices and artificial intelligence have facilitated the development of vision-based measurement technology. This paper mainly focuses on state-of-the-art vision-based methods that can perform 3D shape measurement with high precision and high resolution. Specifically, the basic principles and typical techniques of triangulation-based measurement methods as well as their advantages and limitations are elaborated, and the learning-based techniques used for 3D vision measurement are enumerated. Finally, the advances of, and the prospects for, further improvement of vision-based 3D shape measurement techniques are proposed.
Keyword :
deep learning laser scanning stereo vision structured light system calibration three-dimensional measurement triangulation
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GB/T 7714 | Zhang, Guofeng , Yang, Shuming , Hu, Pengyu et al. Advances and Prospects of Vision-Based 3D Shape Measurement Methods [J]. | MACHINES , 2022 , 10 (2) . |
MLA | Zhang, Guofeng et al. "Advances and Prospects of Vision-Based 3D Shape Measurement Methods" . | MACHINES 10 . 2 (2022) . |
APA | Zhang, Guofeng , Yang, Shuming , Hu, Pengyu , Deng, Huiwen . Advances and Prospects of Vision-Based 3D Shape Measurement Methods . | MACHINES , 2022 , 10 (2) . |
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Abstract :
Various micro-structure surface texturing methods have been used to produce optical functional surface in the grinding, such as the textured grinding wheel, wheel path control and off-spindle-axis grinding. However, those grinding technologies are inherently challenged to employ in large-scale surface grinding due to the extremely high requirement for wheel cutting profile dressing. In this study, a novel phase shift modulation based on wheel oscillation motion was proposed to generate the micro-structure array in ultra-precision grinding. The phase shift effect involved in the surface micro-structure generation is investigated, in which the role of the second phase shift on superimposed mode and micro-waviness forms is discussed. A theoretical model based on the tool superimposed oscillation is established to study the micro-structure texture generation mechanism by considering the second phase shift. The influence of modulation frequency in the case of phase shift and out of phase shift on the surface texture generation both for the striation pattern and micro-structure is compared to clarify the transition between the continuous grooves and the discrete micro-structure array. The study indicates that the phase shift modulation represents a novel paradigm for fabricating micro-structure array with considerable capability and high efficiency in ultra-precision grinding. (C) 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement
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GB/T 7714 | Chen, Shanshan , Yang, Shuming , Cheung, Chi Fai et al. Fabrication of the high-precision micro-structure array using a phase shift modulation of superimposed oscillation in ultra-precision grinding [J]. | OPTICS EXPRESS , 2022 , 30 (24) : 44321-44338 . |
MLA | Chen, Shanshan et al. "Fabrication of the high-precision micro-structure array using a phase shift modulation of superimposed oscillation in ultra-precision grinding" . | OPTICS EXPRESS 30 . 24 (2022) : 44321-44338 . |
APA | Chen, Shanshan , Yang, Shuming , Cheung, Chi Fai , Duan, Duanzhi , Ho, Lai Ting , Jiang, Zhuangde et al. Fabrication of the high-precision micro-structure array using a phase shift modulation of superimposed oscillation in ultra-precision grinding . | OPTICS EXPRESS , 2022 , 30 (24) , 44321-44338 . |
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Graphene/silicon Schottky junctions have been proven efficient for photodetection, but the existing high dark current seriously restricts applications such as weak signal detection. In this paper, a thin layer of gadolinium iron garnet (Gd3Fe5O12, GdIG) film is introduced to engineer the interface of a graphene/silicon Schottky photodetector. The novel structure shows a significant decrease in dark current by 54 times at a -2 V bias. It also exhibits high performance in a self-powered mode in terms of an I-light/I-dark ratio up to 8.2 x 10(6) and a specific detectivity of 1.35 x 10(13) Jones at 633 nm, showing appealing potential for weak-light detection. Practical suitability characterizations reveal a broadband absorption covering ultraviolet to near-infrared light and a large linear response with a wide range of light intensities. The device holds an operation speed of 0.15 ms, a stable response for 500 continuous working cycles, and long-term environmental stability after several months. Theoretical analysis shows that the interlayer increases the barrier height and passivates the contact surface so that the dark current is suppressed. This work demonstrates the good capacity of GdIG thin films as interlayer materials and provides a new solution for high-performance photodetectors.
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GB/T 7714 | Ji, Peirui , Yang, Shuming , Wang, Yu et al. High-performance photodetector based on an interface engineering-assisted graphene/silicon Schottky junction [J]. | MICROSYSTEMS & NANOENGINEERING , 2022 , 8 (1) . |
MLA | Ji, Peirui et al. "High-performance photodetector based on an interface engineering-assisted graphene/silicon Schottky junction" . | MICROSYSTEMS & NANOENGINEERING 8 . 1 (2022) . |
APA | Ji, Peirui , Yang, Shuming , Wang, Yu , Li, Kaili , Wang, Yiming , Suo, Hao et al. High-performance photodetector based on an interface engineering-assisted graphene/silicon Schottky junction . | MICROSYSTEMS & NANOENGINEERING , 2022 , 8 (1) . |
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Abstract :
Ultra-precision grinding is crucial for manufacturing high-end optics and molds, while the unbalanced wheel vibration is inevitable and becomes even more critical in surface generation, which resulted in undesired waviness and micro-texture on the ground surface. In this paper, to understand and control the micro-texture generation, a theoretical model has been developed to predict the deterministic surface micro-texture generation resulted from unbalanced tool vibration in ultra-precision grinding, in which the overlap trajectories of grinding wheel with an arc cutting edge were analyzed and calculated. The simulation work was performed and a double phase mechanism involved in deterministic textural pattern and structure has been revealed. Both theoretical and experimental results proved that phase shift is an important factor to determine micro-texture evolution in the ultra-precision grinding process. On this basis, a novel tool path strategy has been proposed to fabricate deterministic micro-structure by coordinating oscillation motion of the grinding wheel and phase shift control, in which a rhombus-shaped micro-structure array can be generated. A small adjustment for the phase shift was conducted and it was found that the more complex micro-texture with different textural patterns and micro-structure can be machined. The results indicated that the phase control for the tool path planning is an effective method to fabricate flexible and tunable micro-texture surfaces in ultra-precision grinding. (C) 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement
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GB/T 7714 | Chen, Shanshan , Yang, Shuming , Liao, Zhirong et al. Study of deterministic surface micro-texture generation in ultra-precision grinding considering wheel oscillation [J]. | OPTICS EXPRESS , 2022 , 30 (4) : 5329-5346 . |
MLA | Chen, Shanshan et al. "Study of deterministic surface micro-texture generation in ultra-precision grinding considering wheel oscillation" . | OPTICS EXPRESS 30 . 4 (2022) : 5329-5346 . |
APA | Chen, Shanshan , Yang, Shuming , Liao, Zhirong , Cheung, Chi Fai , Jiang, Zhuangde , Zhang, Feihu . Study of deterministic surface micro-texture generation in ultra-precision grinding considering wheel oscillation . | OPTICS EXPRESS , 2022 , 30 (4) , 5329-5346 . |
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Abstract :
The properties of near-field optics have always been the focus of nano-measurement technology. The 11th order effective near-field optical signal with an incident laser wavelength of 1,550 nm is obtained using a platinum-coated optical probe (Pt-Si probe). The experimental results show that the local electric field intensity of the Pt-Si probe is nearly 30 times higher than that of silicon probe (Si probe). Therefore, the highest 7th order near-field optical imaging results are obtained with the Pt-Si probe. Further, near-field optical imaging is performed on samples such as gold grids and carbon nanotubes using the Pt-Si probe. The measurement results show that the high-order signal has the characteristics of less background, higher signal-to-noise ratio, and resolution up to 5.7 nm.
Keyword :
high-order optical signal high resolution local electric field enhancement optical probe
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GB/T 7714 | Wang, Fei , Yang, Shuming , Li, Shaobo et al. High resolution and high signal-to-noise ratio imaging with near-field high-order optical signals [J]. | NANO RESEARCH , 2022 , 15 (9) : 8345-8350 . |
MLA | Wang, Fei et al. "High resolution and high signal-to-noise ratio imaging with near-field high-order optical signals" . | NANO RESEARCH 15 . 9 (2022) : 8345-8350 . |
APA | Wang, Fei , Yang, Shuming , Li, Shaobo , Zhao, Shuhao , Cheng, Biyao , Xia, Chengsheng . High resolution and high signal-to-noise ratio imaging with near-field high-order optical signals . | NANO RESEARCH , 2022 , 15 (9) , 8345-8350 . |
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Abstract :
Structured-light (SL) three-dimensional (3D) shape measurements technique has been extensively studied and applied in various fields, but the real-time capability of SL system is limited by the number of projected SL patterns. This paper presents a digital image correlation (DIC) assisted phase matching and triple-scanning method for high-speed and accurate 3D shape measurements based on the combined projection of three-step phase-shifting patterns and one speckle pattern. Benefiting from the triple-view geometric constraints and DIC technique, stereo correspondence and absolute fringe order of each valid pixel in the left wrapped phase map can be explored without requiring spatial phase unwrapping process or any priori information, the initial disparity map and absolute phase map can be generated. Subsequently, an efficient disparity refinement scheme based on connectivity area segmentation and neighbor disparity check is applied to the initial disparity map and absolute phase map to compensate the pixels with wrong disparities. Several efficient strategies are developed in the pipeline of data processing to speed up the algorithm. To improve the measurement accuracy, stereo SL model is proposed to make adequate use of triple-view information to calculate 3D coordinates using the disparity map and absolute phase map, and the measurement error has been reduced by 33% compared with the conventional methods. The experimental results demonstrate that the proposed method can perform high-speed and accurate 3D shape measurements for arbitrary surfaces and dynamic scenes.
Keyword :
3D shape measurement Digital image correlation High-speed Structured-light Triple-scanning
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GB/T 7714 | Hu, Pengyu , Yang, Shuming , Zhang, Guofeng et al. High-speed and accurate 3D shape measurement using DIC-assisted phase matching and triple-scanning [J]. | OPTICS AND LASERS IN ENGINEERING , 2021 , 147 . |
MLA | Hu, Pengyu et al. "High-speed and accurate 3D shape measurement using DIC-assisted phase matching and triple-scanning" . | OPTICS AND LASERS IN ENGINEERING 147 (2021) . |
APA | Hu, Pengyu , Yang, Shuming , Zhang, Guofeng , Deng, Huiwen . High-speed and accurate 3D shape measurement using DIC-assisted phase matching and triple-scanning . | OPTICS AND LASERS IN ENGINEERING , 2021 , 147 . |
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Abstract :
The development of numerical models applicable to ultra-precision machining presents serious challenges. Molecular dynamics methods can effectively capture nano-cutting operations at the micro-nanoscale but fail to accurately capture the realistically large-scale deformations involved in material removal, while it can be addressed by finite element methods but lacks the precision required for modeling nanoscale behaviors. The present study addresses this issue by developing a multi-scale numerical modeling method, the optimized Quasicontinuum (QC) method. Compared with the original QC method, the optimized QC method adds the material removal function, avoids unreasonable lattice excessive distortion and large-area, deep dislocation slip. The optimized QC method can more truly simulate the large deformation and material removal phenomenon of cutting, and greatly improve the calculation speed. The influence of cutting parameters such as cutting depth, tool rake angle and rounded tool cutting edge radius on cutting force is studied. The change of cutting depth has the most significant influence on cutting force, while the influence of tool rake angle and rounded tool cutting edge radius are relatively small. Therefore, the effect of cutting depth on cutting force is studied through the experiment of single crystal copper nano-cutting to verify the effectiveness of multi-scale method. The experimental results show that it is proportional to the simulation results.
Keyword :
Multi-level modeling Nano-cutting Optimization Ultra-precision
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GB/T 7714 | Yang, Shuming , Cheng, Biyao , McGeough, Joseph A. et al. Multi-scale numerical analysis and experimental verification for nano-cutting [J]. | JOURNAL OF MANUFACTURING PROCESSES , 2021 , 71 : 260-268 . |
MLA | Yang, Shuming et al. "Multi-scale numerical analysis and experimental verification for nano-cutting" . | JOURNAL OF MANUFACTURING PROCESSES 71 (2021) : 260-268 . |
APA | Yang, Shuming , Cheng, Biyao , McGeough, Joseph A. , Woldu, Yonas Tesfaye , Yang, Xiaokai . Multi-scale numerical analysis and experimental verification for nano-cutting . | JOURNAL OF MANUFACTURING PROCESSES , 2021 , 71 , 260-268 . |
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Abstract :
Carbon nanotubes (CNTs) can be used as atomic force microscopy (AFM) tips for high-resolution scanning due to their small diameter, high aspect ratio and outstanding wear resistance. However, previous approaches for fabricating CNT probes are complex and poorly controlled. In this paper, we introduce a simple method to selectively fabricate a single CNT on an AFM tip by controlling the trigger threshold to adjust the amount of growth solution attached to the tip. The yield rate is over 93%. The resulting CNT probes are suitable in length, without the need for a subsequent cutting process. We used the CNT probe to scan the complex nanostructure with a high aspect ratio, thereby solving the long-lasting problem of mapping complex nanostructures.
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GB/T 7714 | Cheng, Biyao , Yang, Shuming , Li, Wei et al. Controlled growth of a single carbon nanotube on an AFM probe [J]. | MICROSYSTEMS & NANOENGINEERING , 2021 , 7 (1) . |
MLA | Cheng, Biyao et al. "Controlled growth of a single carbon nanotube on an AFM probe" . | MICROSYSTEMS & NANOENGINEERING 7 . 1 (2021) . |
APA | Cheng, Biyao , Yang, Shuming , Li, Wei , Li, Shi , Shafique, Shareen , Wu, Dong et al. Controlled growth of a single carbon nanotube on an AFM probe . | MICROSYSTEMS & NANOENGINEERING , 2021 , 7 (1) . |
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Abstract :
In this paper, a graphene photodetector modified with both gold nanoparticles and silver nanoparticles was discussed. The performance of the photodetector was improved by the common electrode structure prepared by transferring graphene on the top of the device. The gold nanoparticles and silver nanoparticles prepared via the annealing process can excite localized surface plasmon under illumination, and the photoresponse of the photodetector in the wavelength range of 400−470 nm and 510−620 nm. The responsivity increased by up to 2.8 times. As the photosensitive material, graphene on the top participated in photoelectric response, improving the performance of the photodetector in the wavelength range of 400−850 nm, and realized 1.4–1.5 times performance improvement in the wide-band range. Through the above improvements, the responsivity of the photodetector under 400−470 nm and 510−620 nm illumination increased by 2–4 times; the specific detectivity under 450 nm illumination increased by 2.7 times, and the external quantum efficiency increased by 400 %. Therefore, the photodetector can achieve enhancement in its multi-band selective response and improvement in its optical detection performance in a wide-band range. © 2021 Elsevier B.V.
Keyword :
Fiber optic sensors Gold nanoparticles Graphene Metal nanoparticles Photodetectors Photons Silver nanoparticles Surface plasmon resonance Surface plasmons
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GB/T 7714 | Suo, Hao , Yang, Shuming , Ji, Peirui et al. Multi-band enhanced graphene photodetector based on localized surface plasmon [J]. | Sensors and Actuators, A: Physical , 2021 , 322 . |
MLA | Suo, Hao et al. "Multi-band enhanced graphene photodetector based on localized surface plasmon" . | Sensors and Actuators, A: Physical 322 (2021) . |
APA | Suo, Hao , Yang, Shuming , Ji, Peirui , Wang, Yiming . Multi-band enhanced graphene photodetector based on localized surface plasmon . | Sensors and Actuators, A: Physical , 2021 , 322 . |
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