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Engineering S-scheme W_(18)O_(49)/ZnIn_(2)S_(4)heterojunction by Co_(x)P nanoclusters for enhanced charge transfer capability and solar hydrogen evolution

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Nano Research 2024年第9期17卷 8095-8103页

作者： Xiaojie Liu Erkang Liu Zixian Wang Wen zhang Mingyu Dou Hua Yang Changhua An dacheng Li Jianmin Dou Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology School of Chemistry and Chemical EngineeringLiaocheng UniversityLiaocheng 252059China Tianjin Key Laboratory of Organic Solar Cell and Photochemical Conversion School of Chemistry and Chemical EngineeringTianjin Key Laboratory of Advanced Functional Porous MaterialsInstitute for New Energy Materials and Low-Carbon TechnologiesTianjin University of TechnologyTianjin 300384China Institute of Powder Metallurgy and Advanced Ceramics School of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijing 100083China

Enhancement of the light-absorption response and utilization of the photogenerated carriers represent a robust strategy for the design of high-performance *** this work,grafting Co_(x)P nanoclusters onto S-scheme heterojunction of W18O49/ZnIn2S4(WO/ZIS-CoxP)with strong response to the ultraviolet-visible-near infrared ray(UV-vis-NIR)region has been achieved,which possesses efficient electron-transfer-channel,and boosts charge-separation and transport *** as-prepared WO/ZIS-Co_(x)P yields an impressive solar-driven hydrogen production rate of 45 mmol·g^(-1)·h^(-1).The increased photocatalytic performance is attributed to the synergistic effect of the composite catalyst:(1)The local surface plasmon resonance-induced“hot electron”injection of W_(18)O_(49)significantly increases the electron density;(2)the engineered S-scheme directional electron transfer promotes charge separation and enhances the reducing capability of photoexcited electrons;and(3)Co_(x)P as electron-trap site for accelerating surface proton reduction *** work provides a platform to impart nonprecious co-catalyst for engineering S-scheme heterojunction,serving a class of efficient solar-driven photocatalyst towards hydrogen production.

关键词： hydrogen cocatalyst photocatalysis S-scheme hot electron

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Diode-pumped Kerr-lens mode-locked Ti: sapphire laser with broad wavelength tunability

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Chinese Physics B 2019年第9期28卷 232-236页

作者： Han Liu Geyang Wang Ke Yang Renzhu Kang Wenlong Tian dacheng zhang Jiangfeng Zhu Hainian Han Zhiyi Wei School of Physics and Optoelectronic Engineering Xidian UniversityXi’an 710071China Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China

We report a direct blue-diode-pumped wavelength tunable Kerr-lens mode-locked Ti: sapphire *** wavelength tunability as broad as 89 nm(736-825 nm) is achieved by adjusting the insertion of the *** as short as 17 fs are generated at a central wavelength of 736 nm with an average output power of 31 *** maximum output power is 46.8 mW at a central wavelength of 797 nm with a pulse duration of 46 fs.

关键词： blue-diode pump Ti: sapphire wavelength tunable Kerr-lens mode-locked laser

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A Novel Application of Anodic Bonding for Electrical Interconnect and Its Parameter Characterization

A Novel Application of Anodic Bonding for Electrical Interco...

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2008 9th International Conference on Solid-State and Integrated-Circuit Technology

作者： Xuejiao Fan dacheng zhang Institute of Microelectronics Peking University

In this paper,Si-Au/Pt/Ti contact structure is fabricated using anodic bonding to realize the electrical *** order to evaluate the quality of contact structure,the contact resistance is *** first,the cross-bridge Kelvin method is optimized and a new four-terminal bonded vertical Kelvin test structure is presented to directly and precisely measure the contact resistance.A two-dimensional resistor network model is established to obtain the relationship between the contact resistance and the measured *** the fabricated test structure is tested and moreover the contact resistance of the bonded Si/Au/Pt/Ti contacts is extracted from the current-voltage characteristic *** obtained from the test indicate that the bonded contact is ohmic contact and the average value of R range from 19.7 to 48.3Ωwhen the contact area,A,is larger than 20*20μm with contact length,L,longer than 20μm;whereas,when A is small than 20*20μm,the contact is not reliable ohmic contact and theⅠ-Ⅴcharacteristic is not stable.

关键词： anodic bonding contact resistance bonded vertical Kelvin method

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A Picosecond Tunable laser System Planned for Identification of Atomic Number Z of Super Heavy Elements

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近代物理研究所和兰州重离子加速器实验室年报：英文版 2006年第1期 106-107页

作者： zhang dacheng Ma Xinwen Wen Zhiyi ZhanWenlong Institute of Modern Physics Chinese Academy of Science Beijing China.

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Convolutional neural network for transient grating frequency-resolved optical gating trace retrieval and its algorithm optimization

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Chinese Physics B 2021年第4期30卷 586-590页

作者： Siyuan Xu Xiaoxian Zhu Ji Wang Yuanfeng Li Yitan Gao Kun Zhao Jiangfeng Zhu dacheng zhang Yunlin Chen Zhiyi Wei School of Physics and Optoelectronic Engineering Xidian UniversityXi'an 710071 China Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China Institute of Applied Micro-Nano Materials School of ScienceBeijing Jiaotong UniversityBeijing 100044China Songshan Lake Material Laboratory Dongguan 523808China

A convolutional neural network is employed to retrieve the time-domain envelop and phase of few-cycle femtosecond pulses from transient-grating frequency-resolved optical gating(TG-FROG) *** use theoretically generated TGFROG traces to complete supervised trainings of the convolutional neural networks,then use similarly generated traces not included in the training dataset to test how well the networks are *** retrieval of such traces by the neural network is *** our case,we find that networks with exponential linear unit(ELU) activation function perform better than those with leaky rectified linear unit(LRELU) and scaled exponential linear unit(SELU).Finally,the issues that need to be addressed for the retrieval of experimental data by this method are discussed.

关键词： transient-grating frequency-resolved optical gating convolutional neural network activation function phase retrieval algorithm

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4-2 Investigation of Uranium Spectra by Laser-induced Breakdown Spectroscopy with Ambient Gas

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IMP & HIRFL Annual Report 2014年第1期 179-180页

作者： zhang dacheng Ma Xinwen zhang Ying Wang Shulong Zhu Xiaolong 不详

With the rapid development of nuclear power and nuclear industry, it is needed to develop a novel inspection technologyfor nuclear materials, nuclear fuel, and nuclear waste, which should provide reliable and fast measurementsin various processes of the nuclear fuel cycle. As a purely optical method, laser-induced breakdown spectroscopy(LIBS) is regarded as a suitable method for remote analysis of any material phase in the environment of highradiation *** paper presents the LIBS spectra of uranium metal and their features in different ambient gas at *** third harmonic pulse of a Nd:YAG laser was used for ablation of uranium metal and the plasma emission

关键词： Investigation Uranium Spectra

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A LIBS Setup for Plant Sample Analysis

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近代物理研究所和兰州重离子加速器实验室年报：英文版 2007年第1期 132-133页

作者： zhang dacheng Ma Xinwen Zhu Xiaolong Li Bin Zu Kailing

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4- 11 Development of a Virtual Instrument based on LabVIEW for Laser-induced Fluorescence Spectroscopy

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IMP & HIRFL Annual Report 2013年第1期 187-188页

作者： Yang Jie Cheng Xiaowei Zhao Dongmei zhang dacheng Ma Xinwen Supported by the Chinese Academy of Sciences Hundred Talents Program and National Natural Science Foundation of China.

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4 - 12 Laser-induced Fluorescence Study on S2 Molecule

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IMP & HIRFL Annual Report 2013年第1期 188-189页

作者： Yang Jie Cheng Xiaowei Zhao Dongmei zhang dacheng Ma Xinwen Supported by the Chinese Academy of Sciences Hundred Talents Program and National Natural Science Foundation of China (No.11274316 and 21203216).

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培育农业信息市场支持农户决策优化

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农业技术经济 2000年第1期 21-24页

作者：张大成中国农业大学管理科学研究所

农户群体的决策优化以农业市场信息的有效流动为条件。针对当前我国农村信息市场有效需求不足的问题，本文从信息经济学的观点，分析了生产规模影响信息市场空间的逻辑过程，指出我国过小的农业生产规模无法满足“买卖双赢”这个信息市... 详细信息

农户群体的决策优化以农业市场信息的有效流动为条件。针对当前我国农村信息市场有效需求不足的问题，本文从信息经济学的观点，分析了生产规模影响信息市场空间的逻辑过程，指出我国过小的农业生产规模无法满足“买卖双赢”这个信息市场存在的必要条件，是制约其形成发展的重要内因。政府不宜长期扮演目前在农村信息活动中的角色，而应运用自己的影响力和组织力引导农户走联合的规模化道路，才能培育起农业生产信息市场，最终实现农村经济的长期稳定发展。

关键词：农业信息市场农户决策优化生产规模

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