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学者姓名:杨树明

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Production of high-quality and large lateral-size black phosphorus nanoparticles/nanosheets by liquid-phase exfoliation EI SCIE Scopus
期刊论文 | 2023 , 13 (2) , 1223-1228 | RSC ADVANCES
SCOPUS Cited Count: 4
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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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Advances and Prospects of Vision-Based 3D Shape Measurement Methods SCIE Scopus
期刊论文 | 2022 , 10 (2) | MACHINES
SCOPUS Cited Count: 4
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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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High-performance photodetector based on an interface engineering-assisted graphene/silicon Schottky junction SCIE Scopus
期刊论文 | 2022 , 8 (1) | MICROSYSTEMS & NANOENGINEERING
SCOPUS Cited Count: 21
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Abstract :

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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Fabrication of the high-precision micro-structure array using a phase shift modulation of superimposed oscillation in ultra-precision grinding SCIE
期刊论文 | 2022 , 30 (24) , 44321-44338 | OPTICS EXPRESS
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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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High resolution and high signal-to-noise ratio imaging with near-field high-order optical signals SCIE Scopus
期刊论文 | 2022 , 15 (9) , 8345-8350 | NANO RESEARCH
SCOPUS Cited Count: 5
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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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Study of deterministic surface micro-texture generation in ultra-precision grinding considering wheel oscillation EI SCIE Scopus
期刊论文 | 2022 , 30 (4) , 5329-5346 | OPTICS EXPRESS
SCOPUS Cited Count: 7
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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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High-speed and accurate 3D shape measurement using DIC-assisted phase matching and triple-scanning EI SCIE
期刊论文 | 2021 , 147 | OPTICS AND LASERS IN ENGINEERING
WoS CC Cited Count: 2
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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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Multi-scale numerical analysis and experimental verification for nano-cutting EI SCIE
期刊论文 | 2021 , 71 , 260-268 | JOURNAL OF MANUFACTURING PROCESSES
WoS CC Cited Count: 1
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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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Controlled growth of a single carbon nanotube on an AFM probe SCIE PubMed CSCD
期刊论文 | 2021 , 7 (1) | MICROSYSTEMS & NANOENGINEERING
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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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Axial intensity distribution of a micro-Fresnel zone plate at an arbitrary numerical aperture EI SCIE
期刊论文 | 2021 , 29 (8) , 12093-12109 | OPTICS EXPRESS
WoS CC Cited Count: 1
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The axial focus number (the number of focal spots along the axial direction) and focus intensity of a micro-Fresnel zone plate (FZP) are analyzed from deep ultraviolet to infrared using the Fourier decomposition, the vectorial angular spectrum (VAS) theory, and the three-dimensional finite-difference time-domain (FDTD) method. For a low-numerical aperture (NA) micro-FZP (NA<0.1), there are multiple axial high-order foci, and the intensity of each focus decreases slowly. However, the intensity of each high-order focus decreases rapidly with NA increasing. For a relatively high-NA micro-FZP (NA>0.3), the axial high-order foci are suppressed and there is one single focus. A fast, precise, and cost-efficient additive manufacturing method, i.e. two-photon polymerization, is used to fabricate high-NA phase-type micro-FZPs. The experiment has validated the phenomenon of linear negative focal shift of a high-NA micro-FZP. This property can be particularly applied in precise measurement of micro-displacement, film thickness, micro/nano step height, and wavelength. (C) 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

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GB/T 7714 Liu, Qiang , Liu, Tao , Yang, Shuming et al. Axial intensity distribution of a micro-Fresnel zone plate at an arbitrary numerical aperture [J]. | OPTICS EXPRESS , 2021 , 29 (8) : 12093-12109 .
MLA Liu, Qiang et al. "Axial intensity distribution of a micro-Fresnel zone plate at an arbitrary numerical aperture" . | OPTICS EXPRESS 29 . 8 (2021) : 12093-12109 .
APA Liu, Qiang , Liu, Tao , Yang, Shuming , Li, Guoqing , Li, Shaobo , He, Tao . Axial intensity distribution of a micro-Fresnel zone plate at an arbitrary numerical aperture . | OPTICS EXPRESS , 2021 , 29 (8) , 12093-12109 .
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