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An efficient route to prepare suspended monolayer for feasible optical and electronic characterizations of two-dimensional materials

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InfoMat 2022年第2期4卷 126-138页

作者： Yuan Huang Yun-Kun Wang Xin-Yu Huang Guan-Hua Zhang Xu Han Yang Yang Yunan Gao Lei Meng Yushu Wang guang-zhou geng Li-Wei Liu Lin Zhao Zhi-Hai Cheng Xin-Feng Liu Ze-Feng Ren Hui-Xia Yang Yufeng Hao Hong-Jun Gao Xing-Jiang zhou Wei Ji Ye-Liang Wang Advanced Research Institute of Multidisciplinary Science Beijing Institute of TechnologyBeijingChina Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijingChina Songshan Lake Materials Laboratory DongguanChina State Key Laboratory for Artificial Microstructure and Mesoscopic Physics School of PhysicsPeking UniversityBeijingChina Frontiers Science Center for Nanooptoelectronics&Collaborative Innovation Center of Quantum Matter BeijingChina State Key Laboratory of Molecular Reaction Dynamics Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalianChina Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuanChina Minzu University of China BeijingChina National Laboratory of Solid State Microstructures College of Engineering and Applied SciencesJiangsu Key Laboratory of Artificial Functional MaterialsCollaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjingChina School of Information and Electronics MIIT Key Laboratory for Low-Dimensional Quantum Structure and DevicesBeijing Institute of TechnologyBeijingChina Department of Physics and Beijing Key Laboratory of Optoelectronic Functional Materials&Micro-Nano Devices Renmin University of ChinaBeijingChina National Center for Nanoscience and Technology(NCNST)of China BeijingChina Haian Institute of New Technology Nanjing UniversityHaianChina University of Chinese Academy of Sciences BeijingChina

Two-dimensional(2D)materials are highly sensitive to substrates,interfaces,and the surrounding *** 2D materials are free from substrate-induced effects,thus an ideal approach to study their intrinsic ***,it is very challenging to prepare large-area suspended 2D materials with high *** we report a universal method,based on pretreatments of densely patterned hole array substrates with either oxygenplasma or gold film deposition,to prepare large-area suspended mono-and few-layer 2D *** structural,optical,and electrical characterization tools were used to fully evaluate the improved performance of various suspended 2D *** of these observations reported in this study are:(1)Observation of a new Raman low frequency mode for the suspended MoS_(2);(2)Significantly stronger photoluminescence(PL)and second harmonic generation(SHG)signals of suspended WSe_(2),which enables the study of new optical transition processes;(3)The low energy electron diffraction pattern on suspended MoS_(2) also exhibits much sharper spots than that on the supported area;and(4)The mobility of suspended graphene device approaches 300000 cm^(2) V^(-1) s^(-1),which is desirable to explore the intrinsic properties of *** work provides an innovative and efficient route for fabricating suspended 2D materials,and we expect that it can be broadly used for studying intrinsic properties of 2D materials and in applications of hybrid active nanophotonic and electronic devices.

关键词： mechanical exfoliation photoluminescence Raman spectrum suspended 2D materials

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A Flexible Smart Healthcare Platform Conjugated with Artificial Epidermis Assembled by Three‑Dimensionally Conductive MOF Network for Gas and Pressure Sensing

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Nano-Micro Letters 2025年第2期17卷 601-620页

作者： Qingqing zhou Qihang Ding Zixun geng Chencheng Hu Long Yang Zitong Kan Biao Dong Miae Won Hongwei Song Lin Xu Jong Seung Kim State Key Laboratory of Integrated Optoelectronics College of Electronic Science and EngineeringJilin UniversityChangchun 130012People’s Republic of China Department of Chemistry Korea UniversitySeoul 02841Republic of Korea TheranoChem Incorporation Seoul 02856Republic of Korea

The rising flexible and intelligent electronics greatly facilitate the noninvasive and timely tracking of physiological information in telemedicine *** building bionic-sensitive moieties is vital for designing efficient electronic skin with advanced cognitive functionalities to pluralistically capture external ***,realistic mimesis,both in the skin’s three-dimensional interlocked hierarchical structures and synchronous encoding multistimuli information capacities,remains a challenging yet vital need for simplifying the design of flexible logic ***,we construct an artificial epidermal device by in situ growing Cu_(3)(HHTP)_(2) particles onto the hollow spherical Ti_(3)C_(2)T_(x) surface,aiming to concurrently emulate the spinous and granular layers of the skin’s *** bionic Ti_(3)C_(2)T_(x)@Cu_(3)(HHTP)_(2) exhibits independent NO_(2) and pressure response,as well as novel functionalities such as acoustic signature perception and Morse code-encrypted message ***,a wearable alarming system with a mobile application terminal is self-developed by integrating the bimodular senor into flexible printed *** system can assess risk factors related with asthmatic,such as stimulation of external NO_(2) gas,abnormal expiratory behavior and exertion degrees of fingers,achieving a recognition accuracy of 97.6%as assisted by a machine learning *** work provides a feasible routine to develop intelligent multifunctional healthcare equipment for burgeoning transformative telemedicine diagnosis.

关键词： Ti_(3)C_(2)T_(x)@Cu_(3)(HHTP)_(2)composites NO_(2)/pressure flexible sensors Health-monitoring Machine learning

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Protein-based functional hydrogel improves cutaneous nerve repair and diabetic wound healing

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Nano Research 2025年第1期18卷 586-596页

作者： Hanzhi Lu Mingrui Cui Yi Wang Xinran Du Xinyi zhou Yuhan Fang Xiaoyan Gao Ying Peng Jianyong Zhu guang Yang Fulun Li Department of Dermatology Yueyang Hospital of Integrated Traditional Chinese and Western MedicineShanghai University of Traditional Chinese MedicineShanghai 200437China Shanghai Engineering Research Center of Nano-Biomaterials and Regenerative Medicine College of Biological Science and Medical EngineeringDonghua UniversityShanghai 201620China Clinical Laboratory Medicine Center Yueyang Hospital of Integrated Traditional Chinese and Western MedicineShanghai University of Traditional Chinese MedicineShanghai 200437China

Cutaneous nerve regeneration in diabetic wounds remains a challenge for current clinical ***,a natural protein-based functional hydrogel is developed using keratin as the sole matrix,and protocatechuic aldehyde(PA)and zinc ions as the building blocks through dual-dynamic crosslinking reactions of thiol-aldehyde addition and catecholzinc ions *** unique structural design endows the hydrogel with excellent injectability,skin adhesion,self-healing and antibacterial ability,and *** addition,this hydrogel acts as a drug carrier for the loading and sustained release of phellopterin(PP),a natural compound extracted from traditional Chinese medicine Angelica *** findings demonstrate that the PP-loaded hydrogel promotes cutaneous nerve regeneration,angiogenesis and tissue remodeling in the full-thickness wounds in both db/db and streptozotocin-induced C57BL/6 diabetic mice,notably by the synergistic effect of zinc ions and PP,showing a great potential in diabetic wound therapy.

关键词： functional hydrogel cutaneous nerve regeneration dynamic crosslinking diabetic wounds

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Performance evaluation of anti-radiation based on the gamma degradation process

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Science China(Technological Sciences) 2017年第4期60卷 501-509页

作者： SONG BingHua zhou ZhongBao MA ChaoQun JIN guang geng ShaoFeng School of Business Administration Hunan University Changsha 410082 China College of Information System and Management National University of Defense Technology Changsha 410073 China College of Computer Science and Electronic Engineering Hunan University Changsha 410082 China

In the environment of space radiation, the high-energy charged particles or high-energy photons acting on a spacecraft can cause either temporary device degradation or permanent failure. The traditional probability model is difficult to obtain reliable estimation of unit radiation resistance performance with small samples. Considering that different products will change differently after high-energy particle radiation, we construct a model based on the gamma degradation process. This model can efficiently describe the law of unit radiation resistance variation with the total radiation dose levels under the effect of the total dose and displacement damage. Finally, the proposed model is used to assess the anti-radiation performance of the N-channel power MOSFET device STRH60N20FSY3 produced by STM to obtain average unit radiation resistance, survival probability, survival function, etc.

关键词： performance evaluation unit radiation resistance gamma degradation process survival probability

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PetroKG: Construction and Application of Knowledge Graph in Upstream Area of PetroChina

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Journal of Computer Science & Technology 2020年第2期35卷 368-378页

作者： Xiang-guang zhou Ren-Bin Gong Fu-geng Shi Zhe-Feng Wang PetroChina Research Institute of Petroleum Exploration and Development Beijing 100083China Huawei Technologies Hangzhou 310007China

There is a large amount of heterogeneous data distributed in various sources in the upstream of PetroChina. These data can be valuable assets if we can fully use them. Meanwhile, the knowledge graph, as a new emerging technique, provides a way to integrate multi-source heterogeneous data. In this paper, we present one application of the knowledge graph in the upstream of PetroChina. Specifically, we first construct a knowledge graph from both structured and unstructured data with multiple NLP (natural language progressing) methods. Then, we introduce two typical knowledge graph powered applications and show the benefit that the knowledge graph brings to these applications:compared with the traditional machine learning approach, the well log interpretation method powered by knowledge graph shows more than 7.69% improvement of accuracy.

关键词： knowledge graph natural language processing oil and gas industry

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5-羟甲基糠醛在CuPd(111)上的加氢反应机理研究

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原子与分子物理学报 2025年第4期42卷 53-57页

作者：张兴云周广丽石云山东临沂大学化学化工学院临沂276000

采用密度泛函理论,利用包含零点能校正的PBE-D3方法研究了5-羟甲基糠醛在双金属催化剂CuPd(111)上表面的加氢还原反应,考虑了两种反应路径,第一种反应路径是侧链上的醛基氧首先发生加氢反应生成F-CHOH中间体,然后F-CHOH中间体继续加氢生... 详细信息

采用密度泛函理论,利用包含零点能校正的PBE-D3方法研究了5-羟甲基糠醛在双金属催化剂CuPd(111)上表面的加氢还原反应,考虑了两种反应路径,第一种反应路径是侧链上的醛基氧首先发生加氢反应生成F-CHOH中间体,然后F-CHOH中间体继续加氢生成2,5-二羟甲基呋喃;第二种反应路径是侧链上的醛基碳先加氢原还原生成F-CH_(2)O中间体,生成的F-CH_(2)O进一步加氢还原生成2,5-二羟甲基呋喃.计算了两种竞争反应路径的活化能垒和反应热,结果表明,5-羟甲基糠醛在CuPd(111)面加氢还原生成2,5-二羟甲基呋喃的最佳反应路径为:F-CHO→F-CHOH→F-CH_(2)OH.

关键词： 5-羟甲基糠醛活化能垒反应热

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Automatic facade recovery from single nighttime image

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Frontiers of Computer Science 2020年第1期14卷 95-104页

作者： Yi zhou Qichuan geng Zhong zhou Wei WU State Key Laboratory of Virtual Reality Technology and Systems Beihang UniversityBeijing 100083China

Nighttime images are difficult to process due to insufficient brightness,lots of noise,and lack of ***,they are always removed from time-lapsed image *** is interesting that nighttime images have a unique and wonderful building features that have robust and salient lighting cues from human *** variation depicts both the statistical and individual habitation,and it has an inherent man-made repetitive structure from architectural *** by this,we propose an automatic nighttime fa?ade recovery method that exploits the lattice structures of window ***,a simple but efficient classification method is employed to determine the salient bright regions,which may be lit *** we groupwindows into multiple lattice proposals with respect to fa?ades by patch matching,followed by greedily removing overlapping *** the horizon constraint,we solve the ambiguous proposals problem and obtain the correct ***,we complete the generated fa?ades by filling in the missing *** method is well suited for use in urban environments,and the results can be used as a good single-view compensation method for daytime *** method also acts as a semantic input to other learning-based 3D image reconstruction *** experiment demonstrates that our method works well in nighttime image datasets,and we obtain a high lattice detection rate of 82.1%of 82 challenging images with a low mean orientation error of 12.1±4.5 degrees.

关键词： facade recovery nighttime images lattice detection

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On the Role of Zeros in the Pole Assignment of Scalar High-Order Fully Actuated Linear Systems

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Journal of Systems Science & Complexity 2022年第2期35卷 535-542页

作者： zhou Bin DUAN guang-Ren Center for Control Theory and Guidance Technology Harbin Institute of TechnologyHarbin 150001China Center for Control Science and Technology Southern University of Science and TechnologyShenzhen 518055China

It is well known that for a linear system in state space form,controllability is equivalent to arbitrary pole assignment by state *** brief points out that for a scalar high-order fully actuated linear system,the pole assignment problem is solvable if and only if the desired pole set of the closed-loop system should not include the zero set of the open-loop system if the implementation issue of the controller is taken into account,that is,controllability cannot guarantee arbitrary pole assignment by state feedback.

关键词： High-order fully actuated systems pole assignment state feedback zeros

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Size Distribution and Anisotropy of the Minor Phase Droplets in Polypropylene/Ethylene-Octene Copolymer Blends: Effects of Shear and Component Miscibility

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Chinese Journal of Polymer Science 2014年第1期32卷 9-20页

作者： Cheng-zhen geng Yan-ling Zhu guang-hui Yang 傅强 Chao-liang Zhang Ke Wang Tian-nan zhou College of Polymer Science and Engineering State Key Laboratory of Polymer Materials Engineering Sichuan University State Key Laboratory of Oral Diseases West China Hospital of Stomatology Sichuan University

In this work, polypropylene （PP）/octene-ethylene copolymer （POE） blends were injection-molded using the so- called dynamic packing injection technique, which imposed oscillatory shear on the gradually cooling melt during the packing solidification stage. In this way, the effect of shear on the size distribution and anisotropy of the minor phase droplets could be investigated. Besides, by using two kinds of POE with different octene contents, the effect of component miscibility was also studied. The results show that the droplet size is mainly determined by composition and miscibility, and droplet anisotropy is mainly determined by droplet size and shear. Most importantly, under the same processing condition, droplet anisotropy increases with droplet size, and there seems a linear fit between them, disregarding the miscibility factor. These results may provide guidance for preparing polymer blends with desired properties by tailoring their phase morphologies.

关键词： Shear Miscibility Size distribution Anisotropy Phase morphology.

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Fully Actuated System Approach for Linear Systems Control:A Frequency-Domain Solution

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Journal of Systems Science & Complexity 2022年第6期35卷 2046-2061页

作者： DUAN guang-Ren zhou Bin The Center for Control Science and Technology Southern University of Science and TechnologyShenzhen 518055China The Center for Control Theory and Guidance Technology Harbin Institute of TechnologyHarbin 150001China

This note studies fully actuated linear systems in the frequency domain in terms of polynomial matrix description(PMD).For a controllable first-order linear state-space system model,by using the right coprime factorization of its transfer function matrix,under the condition that the denominator matrix in the right coprime factorization is column reduced,it is equivalently transformed into a fully actuated PMD model,whose time-domain expression is just a high-order fully actuated(HOFA)system *** method is a supplement to the previous one in the time-domain,and reveals a connection between the controllability of the first-order linear state-space system model and the fullactuation of its PMD *** continuous-time and discrete-time linear systems are *** numerical examples are worked out to illustrate the effectiveness of the proposed approaches.

关键词： Column reduced factorization first-order linear state-space systems high-order fully actuated systems polynomial matrix description right coprime

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