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Formation of multifaceted nano-groove structure on rutile TiO_(2) photoanode for efficient electron-hole separation and water splitting

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Journal of Energy Chemistry 2022年第2期31卷 19-25页

作者： Xiaoyi Zhan Yaling Luo Ziyu Wang Yao Xiang Zheng Peng Yong Han Hui Zhang Ruotian Chen Qin Zhou Hongru Peng Hao Huang Weimin Liu Xin Ou Guijun Ma Fengtao Fan Fan Yang Can Li Zhi Liu State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China School of Physical Science and Technology Shanghai Tech UniversityShanghai 201210China State Key Laboratory of Catalysis Dalian National Laboratory for Clean EnergyDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

Photoelectrochemical(PEC)water-splitting using solar energy holds great promise for the renewable energy future,and a key challenge in the development of industry viable PEC devices is the unavailability of high-efficient ***,we designed a TiO_(2) model photocatalyst with nano-groove pattern and different surface orientation using low-energy Ar+irradiation and photoetching of TiO_(2),and significantly improved the intrinsic activity for PEC water ***-resolution transmission electron microscopy directly manifests that the grooves consist of highly stepped surface with<110>steps and *** absorption spectroscopy reveals the groove surface that allows for increased recovery lifetime,which ensures promoted electron-hole separation *** photovoltage directly shows the carrier separation and transportation behaviors,verified by selective photodeposition,demonstrating the groove surface on TiO_(2) contributes to electron-hole *** work proposes an efficient and scalable photoanode strategy,which potentially can open new opportunities for achieving efficient PEC water oxidation performance.

关键词： TiO_(2)nano-grooves Oxygen vacancies Photoetching Water oxidation

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Room-temperature coherent manipulation of single-spin qubits in silicon carbide with a high readout contrast

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National Science Review 2022年第5期9卷 89-98页

作者： Qiang Li Jun-Feng Wang Fei-Fei Yan Ji-Yang Zhou Han-Feng Wang He Liu Li-Ping Guo Xiong Zhou Adam Gali Zheng-Hao Liu Zu-Qing Wang Kai Sun Guo-Ping Guo Jian-Shun Tang Hao Li Li-Xing You Jin-Shi Xu Chuan-Feng Li Guang-Can Guo CAS Key Laboratory of Quantum Information University of Science and Technology of China CAS Center for Excellence in Quantum Information and Quantum Physics University of Science and Technology of China Key Laboratory of Artificial Micro-and Nano-structures of Ministry of Education and School of Physics and Technology Wuhan University Department of Atomic Physics Budapest University of Technology and Economics Wigner Research Centre for Physics State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences(CAS)

Spin defects in silicon carbide(SiC) with mature wafer-scale fabrication and micro/nano-processing technologies have recently drawn considerable *** room-temperature single-spin manipulation of colour centres in SiC has been demonstrated,the typically detected contrast is less than 2%,and the photon count rate is also ***,we present the coherent manipulation of single divacancy spins in 4 H-SiC with a high readout contrast(-30%) and a high photon count rate(150 kilo counts per second)under ambient conditions,which are competitive with the nitrogen-vacancy centres in *** between a single defect spin and a nearby nuclear spin is also *** further provide a theoretical explanation for the high readout contrast by analysing the defect levels and decay *** the high readout contrast is of utmost importance in many applications of quantum technologies,this work might open a new territory for SiC-based quantum devices with many advanced properties of the host material.

关键词： silicon carbide single divacancy defects spin coherent control high readout contrast bright photon emission

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Porous organic polymers: a progress report in China

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Science China Chemistry 2023年第3期66卷 620-682页

作者： Qing Hao You Tao Xuesong Ding Yajie Yang Jie Feng Rui-Lei Wang Xue-Ming Chen Guan-Le Chen Xiaomeng Li Huang OuYang XunLiang Hu Jia Tian Bao-Hang Han Guangshan Zhu Wei Wang Fan Zhang Bien Tan Zhan-Ting Li Dong Wang Li-Jun Wan Key Laboratory of Molecular Nanostructure and Nanotechnology Beijing National Laboratory for Molecular SciencesCAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing 100190China CAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing 100190China Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education and Faculty of Chemistry Northeast Normal UniversityChangchun 130024China State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical EngineeringLanzhou Magnetic Resonance CenterLanzhou UniversityLanzhou 730000China School of Chemistry and Chemical Engineering State Key Laboratory of Metal Matrix CompositesShanghai Electrochemical Energy Devices Research CenterShanghai Jiao Tong UniversityShanghai 200240China Key Laboratory of Material Chemistry for Energy Conversion and Storage Ministry of EducationSchool of Chemistry and Chemical EngineeringHuazhong University of Science and TechnologyWuhan 430074China Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules Shanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai 200032China Department of Chemistry Fudan UniversityShanghai 200438China University of Chinese Academy of Sciences Beijing 100049China

Porous organic polymers(POPs) are porous materials composed of light elements such as C, H, N, and O. The benign characters,including large surface area, good physical and chemical stability, well-defined chemical composition, wide ranges of monomer selection, and strong designability, have made POPs one of the frontiers in materials research. In this review, we discussed the design and synthesis of various POP materials that mainly led by Chinese scientists, including conjugated microporous polymers(CMPs), porous aromatic frameworks(PAFs), and hypercrosslinked porous polymers(HCPs), as well as crystalline POPs comprised of covalent organic frameworks(COFs) and a special class of COFs with triazine rings, covalent triazine frameworks(CTFs), and supramolecular organic frameworks(SOFs), and sorted out their main applications in adsorption, separation,catalysis, and electrochemistry fields.

关键词： Porous porous frontier

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Tunable Multicolor Circularly Polarized Luminescence via Co-assembly of One Chiral Electron Acceptor with Various Donors

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CCS Chemistry 2023年第7期5卷 1592-1601页

作者： Fang Wang Chengshuo Shen Fuwei Gan Guoli Zhang Huibin Qiu School of Chemistry and Chemical Engineering Zhangjiang Institute for Advanced StudyFrontiers Science Center for Transformative MoleculesState Key Laboratory of Metal Matrix CompositesShanghai Jiao Tong UniversityShanghai 200240 Key Laboratory of Specially Functional Polymeric Materials and Related Technology(Ministry of Education) School of Material Science and EngineeringEast China University of Science and TechnologyShanghai 200237

Chiroptical materials with multicolor and signinvertible circularly polarized luminescence(CPL)are important for advanced optical devices and display ***,a general strategy is developed to generate CPL with highly tunable emission bands and handedness through charge-transfer(CT)complexation and co-assembly of one chiral non-emissive tetranitrofluorene-based acceptor with various achiral purple to blue emissive *** resulting assemblies exhibit intense CPL with a rich array of colors(519-668 nm)and prominent dissymmetry factors(|glum|)in the range of 10^(-3)-10^(-2).Notably,the CPL sign can be readily inverted by slightly changing the molecular structure of achiral ***-crystal analysis reveals that the donor and acceptor molecules are alternately and asymmetrically packed in a lamellar fashion through CT interactions,leading to efficient transfer of ***,the refined packing is mediated by the intensity and manner of CT interactions,rendering an inversion of *** chiral co-assembly not only occurs for planar achiral donor molecules,but is also accessible to nonplanar conjugated molecules such as[4]helicene ***,the CPL feature of the resulting products can be easily and broadly manipulated,aiming at advanced chiroptical systems.

关键词： circularly polarized luminescence charge transfer chirality co-assembly supramolecular chemistry

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Controlled Synthesis of Proton-Conductive Porous Organic Polymer Gels via Electrostatically Stabilized Colloidal Formation

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CCS Chemistry 2024年第7期6卷 1767-1775页

作者： Bin Chen Yifeng Kuang Lu Liu Linkun Cai Zaoming Wang Panchao Yin Liangbin Huang Cheng Gu State Key Laboratory of Luminescent Materials and Devices Institute of Polymer Optoelectronic Materials and DevicesSouth China University of TechnologyGuangzhou 510640 College of Polymer Science and Engineering State Key Laboratory of Polymer Materials EngineeringSichuan UniversityChengdu 610065 Key Laboratory of Functional Molecular Engineering of Guangdong Province School of Chemistry and Chemical EngineeringSouth China University of TechnologyGuangzhou 510641 South China Advanced Institute for Soft Matter Science and Technology South China University of TechnologyGuangzhou 510640 Institute for Integrated Cell-Material Sciences Institute for Advanced StudyKyoto UniversityKyoto 606-8501

Porous organic polymers(POPs)have attracted extensive interest due to their structural diversity and predesigned ***,the majority of POPs are synthesized as insoluble and unprocessable powders,which greatly impede their advanced applications because of limited mass transport and inadaptation for device ***,we report a controlled synthetic strategy of macroscopic POP gels by a cation-stabilized colloidal formation mechanism,which is widely adaptable to a large variety of tetra-/tri-amino build blocks for the synthesis of Tröger’s base-linked POP gels,aerogels,and ionic *** POP gels combined the integrated advantages of hierarchically porous structures and tailorable mechanical stiffness,whereas they could load substantial amounts of phosphoric acids and construct unimpeded transport pathways for proton conduction,exhibiting unprecedented proton conductivity at subzero *** strategy offers a new solution to the intractable processing issues of POPs toward device applications with cutting-edge performances.

关键词： porous organic polymers Tröger’s base linkage gels superprotonic conduction subzero temperatures

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Exploration of Earth-Abundant Transition Metals(Fe,Co,Ni)Doped on W_(18)O_(49) System as Electrocatalysts for Urea Productiont

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Chinese Journal of Chemical Physics 2024年第5期37卷 605-613,I0041-I0050,I0099页

作者： Kaile Li Changyan Zhu Xiaohui Yao Ao Yang Yunjie Chu Mengxue Wang Yun Geng Zhongmin Su Min Zhang Institute of Functional Material Chemistry Faculty of ChemistryNational&Local United Engineering Laboratory for Power BatteriesNortheast Normal UniversityChangchun 130024China State Key Laboratory of Supramolecular Structure and Materials Institute of Theoretical ChemistryCollege of ChemistryJilin UniversityChangchun 130021China

The conversion of inert N_(2) and CO_(2) into urea by electrocatalytic technology not only reduces the cost of urea synthesis in future,but also alleviatesthe environmental pollution problem caused by carbon emission in traditional industrial ***,facing downside factors such as strong competitive reactions and unclear reaction mechanism,the design of high-performance urea catalysts is *** study demonstrates that W_(18)O_(49) system doped heteronuclear metals(TM=Fe,Co,Ni)can effectively solve the problem of competitive adsorption between N_(2) and CO_(2) and realize the co-adsorption of N_(2) and CO_(2) at diverse *** theoretical limiting voltages for urea production on TM-W_(18)O_(49)(TM=Fe,Co,Ni)systems are-0.46 V,-0.42 V and-0.52 V,*** results are all lower than that of the contrastive voltage in pristine W_(18)O_(49) system(-0.91 V),further indicating the rationality and necessity of single-atom doped strategy for the co-reduction of two ***,Co-W_(18)O_(49) can theoretically inhibit the side reactions of NRR,CO_(2)RR,and HER,which deserve future experimental exploration in *** study suggests that doping heteronuclear metal into transition metal oxides is a feasible scheme to solve competitive adsorption and improve catalytic performance.

关键词： Urea production Competitive adsorption Doping heteronuclear metals TM-W_(18)O_(49)catalysts Density functional theory calculation

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Terahertz magnetic resonance in MnCr_(2)O_(4)under high magnetic field

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Chinese Physics B 2022年第10期31卷 534-538页

作者： Peng Zhang Kaibo He Zheng Wang Shile Zhang Jianming Dai Fuhai Su Department of Physics Laboratory of Functional Materials and Device for InformaticsFuyang Normal UniversityFuyang 236037China Anhui Provincial Key Laboratory of Condensed Matter Physics at Extreme Conditions High Magnetic Field LaboratoryHefei Institute of Physical Science(HFIPS)Chinese Academy of SciencesHefei 230031China Key Laboratory of Materials Physics Institute of Solid State PhysicsHFIPSChinese Academy of SciencesHefei 230031China

Terahertz(THz)time-domain spectroscopy(THz-TDS)of polycrystalline MnCr_(2)O_(4)was performed at<9 T and low temperatures.A resonance absorption in the sub-THz range with linear blueshifts was observed as the magnetic field was increased from 4 T to 9 *** magnetism-driven absorptions originated from a ferromagnetic resonance,which agrees with low-field electron spin resonance measurements and ferromagnetic resonance *** low-temperature g-factors of MnCr_(2)O_(4)were also obtained using *** work provides new insights into the spin dynamics of chromite spinel compounds in the THz region.

关键词： chromium spinel terahertz time-domain spectroscopy ferromagnetic resonance

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Study on X-ray and electron-excited fluorescence spectroscopy of tungsten using TES

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Nuclear Science and Techniques 2025年第4期36卷 119-126页

作者： Bing-Jun Wu Jing-Kai Xia Shuo Zhang Robin Cantor Wen-Tao Wu Jin-Hua Li Xiao-Ming Xie Zhi Liu State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China Center for Transformative Science ShanghaiTech UniversityShanghai 201210China University of Chinese Academy of Sciences Beijing 100049China STAR Cryoelectronics 25-A Bisbee CourtSanta FeNM 87508-1338USA Center for Excellence in Superconducting Electronics Chinese Academy of SciencesShanghai 200050China Key Laboratory of Earth and Planetary Physics Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China

In the exploration of celestial bodies,such as Mars,the Moon,and asteroids,X-ray fluorescence analysis has emerged as a critical tool for elemental ***,the varying selection rules and excitation sources introduce ***,these discrepancies can cause variations in the intensities of the characteristic spectral lines emitted by identical *** variations,compounded by the minimal energy spacing between these spectral lines,pose substantial challenges for conventional silicon drift detectors(SDD),hindering their ability to accurately differentiate these lines and provide detailed insights into the material *** overcome this challenge,a cryogenic X-ray spectrometer based on transition-edge sensor(TES)detector arrays is required to achieve precise *** study measured and analyzed the K-edge characteristic lines of copper and the diverse L-edge characteristic lines of tungsten using a comparative analysis of the electron and X-ray excitation *** the electron excitation experiments,copper and tungsten targets were employed as X-ray sources,as they emit distinctive X-ray spectra upon electron-beam *** the photon excitation experiments,a molybdenum target was used to produce a continuous spectrum with the prominent Mo Kαlines to emit pure copper and tungsten *** detectors were used for the comparative spectroscopic *** initial comparison revealed no substantial differences in the Kαand Kβlines of copper across different excitation ***,the Lαlines of tungsten exhibited uniformity under different excitation ***,this investigation revealed pronounced differences within the Lβline *** study found that XRF spectra preferentially excite outer-shell electrons,in contrast to intrinsic spectra,owing to different photon and electron interaction *** interactions are selection-ruledependent and involve a single electron,whereas electron intera

关键词： X-ray spectra X-ray emission spectra and fluorescence Superconducting transition-edge sensor X-ray γ-ray spectrometers

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Mechanism of titanium-nitride chemical mechanical polishing

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Chinese Physics B 2021年第2期30卷 549-556页

作者： Dao-Huan Feng Ruo-Bing Wang Ao-Xue Xu Fan Xu Wei-Lei Wang Wei-Li Liu Zhi-Tang Song State Key Laboratory of Functional Materials for Informatics Laboratory of NanotechnologyShanghai Institute of Micro-system and Information TechnologyChinese Academy of SciencesShanghai 200050China University of the Chinese Academy of Sciences Beijing 100049China

During the preparation of the phase change memory,the deposition and chemical mechanical polishing(CMP)of titanium nitride(TiN)are indispensable.A new acidic slurry added with sodium hypochlorite(NaClO)as an oxidizer is developed for the CMP of TiN *** has achieved a material removal rate of 76 nm/min,a high selectivity between TiN film and silica(SiO_(2))films of 128:1,a selectivity between TiN film and tungsten film of 84:1 and a high surface *** understand the mechanism of TiN CMP process,x-ray photoelectron(XPS)spectroscope and potentiodynamic polarization measurement are *** is found that the mechanism of TiN CMP process is cyclic reaction polishing *** addition,both static corrosion rate and the inductively coupled plasma results indicate TiN would not be dissolved,which means that the mechanical removal process of oxide layer plays a decisive role in the material removal ***,the mechanism of TiN polishing process is given based on the analysis of surface potential and the description of blocking function.

关键词： TiN chemical mechanical polishing mechanism

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Dark-Pulse Kerr Comb Enabled Ultrafast Terahertz Wireless Communication

Dark-Pulse Kerr Comb Enabled Ultrafast Terahertz Wireless Co...

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2024 Conference on Lasers and Electro-Optics, CLEO 2024

作者： Zheng, Yi Kong, Deming Jia, Shi Zhou, Liping Wang, Chengli Yi, Ailun Galili, Michael Morioka, Toshio Yvind, Kresten Ou, Xin Oxenløwe, Leif Katsuo Pu, Minhao DTU Electro Department of Electrical and Photonics Engineering Technical University of Denmark Kgs. LyngbyDK-2800 Denmark State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences Shanghai200050 China

We demonstrate the first dark-pulse Kerr comb in the SiCOI platform and its application for terahertz wireless communication with 100.78 Gbit/s net rate per spatial channel over a 10-meter free space distance. CLEO 20... 详细信息

ISBN: (纸本)9781957171395

关键词： Optical Kerr effect

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