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Chinese Journal of Chemistry 2024年第1期42卷 61-66页

作者： Huan Wang Shuwen Guo Qiong Yuan Meiqi Li Yanli Tang Country Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province Key Laboratory of Applied Surface and Colloid ChemistryMinistry of EducationSchool of Chemistry and Chemical EngineeringShaanxi Normal UniversityXi'anShaanxi 710119China

Recently,photodynamic therapy(PDT)has attracted wide attention due to its less susceptibility to drug resistance,broad-spectrum biocidal activity and biosafety in normal ***,the traditional photosensitizers(Ps)face the disadvantage of poor therapeutic efficacy due to the requirement of an aerobic environment to generate ^(1)O_(2) through Type Ⅱ ***,we designed and synthesized a novel cationic conjugated oligomer oligo(phenylene vinylene)(OPV)and studied its antibacterial photodynamic activity against both Gram-negative Escherichia coli(***)and Gram-positive bacteria methicillin-resistant Staphylococcus aureus(MRSA).Importantly,the OpV can rapidly produce reactive oxygen species(ROs)through double pathways,Type Ⅰ and Ⅱ mechanism under white light irradiation,and efficiently kill *** and MRSA at a nanomolar *** dual type photosensitizing capability makes OPV promising for enhanced PDT to treat pathogens and tumors in complex environments.

关键词： Conjugated oligomers Antibacterial photodynamic therapy Oligo(phenylene vinylene) Reactive oxygen species Typelandll pathways

Theoretical study on production cross sections of exotic actinide nuclei in multinucleon transfer reactions

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Chinese Physics C 2017年第12期41卷 33-39页

作者：祝龙 Sino-French Institute of nuclear engineering and Technology Sun Yat-sen University Zhuhai 519082 China

Within the dinuclear system（DNS） model, the multinucleon transfer reactions 129,136Xe ＋248Cm,112Sn＋238U, and 144Xe ＋248Cm are investigated. The production cross sections of primary fragments are calculated with the DNS model. By using a statistical model, we investigate the influence of charged particle evaporation channels on production cross sections of exotic nuclei. It is found that for excited neutron-deficient nuclei the charged particle evaporation competes with neutron emission and plays an important role in the cooling process. The production cross sections of several exotic actinide nuclei are predicted in the reactions 112Sn ＋238U and 136,144Xe ＋*** the beam intensities, the collisions of 136,144Xe projectiles with a 248Cm target for producing neutron-rich nuclei with Z =92-96 are investigated.

关键词： transfer reactions exotic actinide nuclei charged particle evaporation dinuclear system model

Enhanced back-illuminated Ga2O3-based solar-blind ultraviolet photodetectors

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Science China Technological Sciences 2024年第11期67卷 3477-3484页

作者： YAN ZuYong ZHI YuSong JI XueQiang YUE JianYing WANG JinJin LIU Zeng LI Shan LI PeiGang HOU ShangLin WU Gang LEI JingLi TANG WeiHua School of Science State Key Laboratory of Advanced Processing and Recycling of Nonferrous MetalsLanzhou University of Technology China Academy of Launch Vehicle Technology School of Integrated Circuits & State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and Telecommunications School of Electronic Information engineering Inner Mongolia University College of Electronic and Optical engineering & College of Microelectronics National and Local Joint Engineering Laboratory for RF Integration and Micro-Packing TechnologiesNanjing University of Posts and Telecommunications

Ga2O3is a promising material for deep-ultraviolet（DUV） photodetectors due to its ultra-wide bandgap and high thermal and chemical stability. However, because of their relatively low responsivity, Ga2O3-based photodetectors still have difficulty meeting the requirements of practical applications. Here, we construct a high-performance Ga2O3photodetector realized by back-illumination. Utilizing high-crystallinity epitaxially grown Ga2O3as the DUV absorbing layer and the double-polished Al2O3substrate as the transparent window for injection of photons, the device operating in the back-illuminated mode exhibits a higher DUV photoresponse and faster response speed than in the front-illuminated mode. Therefore, our experimental results have led to the development of a novel strategy for designing and fabricating high-performance Ga2O3photodetectors.

关键词： Ga2O3 back-illuminated solar-blind photodetector

Enhanced back-illuminated GaO-based solar-blind ultraviolet photodetectors

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Science China Technological Sciences 2024年

作者： YAN ZuYong ZHI Yu Song JI XueQiang YUE JianYing WANG JinJin LIU Zeng LI Shan LI PeiGang HOU ShangLin WU Gang LEI JingLi TANG WeiHua School of Science State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals Lanzhou University of Technology China Academy of Launch Vehicle Technology School of Integrated Circuits & State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and Telecommunications School of Electronic Information engineering Inner Mongolia University College of Electronic and Optical engineering & College of Microelectronics National and Local Joint Engineering Laboratory for RF Integration and Micro-Packing Technologies Nanjing University of Posts and Telecommunications

Ga2O3is a promising material for deep-ultraviolet （DUV） photodetectors due to its ultra-wide bandgap and high thermal and chemical ***,because of their relatively low responsivity,Ga2O3-based photodetectors still have difficulty meeting the requirements of practical ***,we construct a high-performance Ga2O3photodetector realized by *** high-crystallinity epitaxially grown Ga2O3as the DUV absorbing layer and the double-polished Al2O3substrate as the transparent window for injection of photons,the device operating in the back-illuminated mode exhibits a higher DUV photoresponse and faster response speed than in the front-illuminated ***,our experimental results have led to the development of a novel strategy for designing and fabricating high-performance Ga2O3photodetectors.

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Microstructure characteristics of 12Cr ferritic/martensitic steels with various yttrium

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Journal of Rare Earths 2019年第5期37卷 547-554页

作者： Yingxue Chen Feifei Zhang Qingzhi Yan Xiaoxin Zhang Zhiyuan Hong Institute of nuclear Materials School of Materials Science and Engineering University of Science and Technology Beijing Department of Reactor engineering and Safety Research Center China Nuclear Power Technology Research Institute Advanced Energy Research Center Shenzhen University Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Optoelectronic Engineering Shenzhen University

12Cr ferritic/martensitic steels with 0, 0.1 wt%, 0.2 wt% and 0.3 wt% theoretical yttrium(Y) additions were fabricated by vacuum inducting melting and casting method. Solubilities of Y in the 12Cr steels are0.027, 0.078 and 0.17 for 12Cr-0.1 Y, 12Cr-0.2 Y and 12Cr-0.3 Y, respectively. Phase transformations and microstructure characteristics under different heat-treatment schedules were investigated. The starting temperature of ferrite-to-austenite transformation A^(c1) are maintained about 850℃, but the finishing temperature of ferrite-to-austenite transformation A^(c3) are about 950, 970, 980 and 1000℃ for 12Cr-0 Y,12Cr-0.1 Y, 12Cr-0.2 Y and 12Cr-0.3 Y, respectively, which indicates that A^(c3) increases gradually with the addition of Y. Martensite accompanied with a few δ-ferrite is the dominant structure in all the steels. The amount of δ-ferrite shows a strong dependence with the Y content and austenitizing temperature. Area fraction of δ-ferrite increases with the content of Y, which is the ferrite favouring element. The minimum amount of δ-ferrite are achieved at 950℃ for 12Cr-0 Y, 12Cr-0.1 Y, 12Cr-0.2 Y and 1000℃ for 12Cr-0.3 ***, more carbides precipitate along the martensite laths and grain boundaries in the Y-bearing steel due to the redistribution of carbon between austenite and ferrite resulting from the ferrite favouring element of Y.

关键词： 12Cr ferritic/martensitic steel Yttrium Casting Phase transformation Microstructure characteristics Rare earths

Chemically robust carbon nanotube-PTFE superhydrophobic thin films with enhanced ability of wear resistance

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Progress in Natural Science:Materials International 2017年第3期27卷 396-399页

作者： Kewei Wang Pan Xiong Xiuping Xu Kan Wang YanLong Li Yufeng Zheng State nuclear Electric Power Planning Design & Research Institute College of engineering Peking University

A chemically robust superhydrophobic nanocomposite thin film with enhanced wear resistance is prepared from a composite comprising polytetrafluoroethylene（PTFE） and carbon *** superhydrophobic thin films with hierarchical structure are fabricated by spraying an environmentally friendly aqueous dispersion containing carbon nanotubes and PTFE resin on silicon *** films with a contact angle of 154.1°± 2° and a sliding angle less than 2° remain superhydrophobic after abrading over 500 times under a pressure of 50 g/cm;.The thin film is also extremely stable even under much stress *** further the understanding of the enhancement of wear resistance,we investigated the formation of microsized structure and their *** growth of microbumps is caused by attracting solution droplet to the hydrophilic islands on hydrophobic surface.

关键词： Superhydrophobicity Thin film Carbon nanotube Wear resistance

Screening of glucosinolates degrading lactic acid bacteria and their utilization in rapeseed meal fermentation

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Grain & Oil Science and Technology 2024年第3期7卷 168-176页

作者： Yifang Chen Chong Xie Muhammad Bilal Pei Wang Runqiang Yang College of Food Science and Technology Whole Grain Food Engineering Research CenterNanjing Agricultural UniversityNanjing 210095JiangsuChina The Sanya Institute of Nanjing Agricultural University Sanya 572024HainanChina National Technique Innovation Center for Regional Wheat Production/Key Laboratory of Crop Physiology Ecologyand ManagementMinistry of Agriculture/National Engineering and Technology Center for Information AgricultureNanjing Agricultural UniversityNanjing 210095JiangsuChina

Rapeseed meal is a promising food ingredient, but its utilization is limited by the presence of some potentially harmful ingredients, such as glucosinolates. Fermentation is a cost-effective method of detoxication but a food-grade starter culture with glucosinolates degradation capacity is required. In this study, 46 strains of lactic acid bacteria from traditional paocai brines were screened for their ability to glucosinolate degradation. The results showed that more than 50% of the strains significantly degraded glucosinolates. Two strains of Lactiplantibacillus(p7 and s7) with high capacity of glucosinolates degradation through producing enzymes were identified. Then,an optimized condition for rapeseed meal fermentation by p7 was established to degrade glucosinolates, which can achieve about 80% degradation. UPLC/Q-TOF-MS analysis showed that the degradation rate of individual glucosinolates was different and the degradation rate of gluconapin and progoitrin in rapeseed meal can reach more than 90%. Meanwhile, fermentation with p7 can improve safety of rapeseed meal by inhibiting the growth of Enterobacteriaceae and improve its nutritional properties by degrading phytic acid. The in vitro digestion experiments showed that the content of glucosinolates in rapeseed meal decreased significantly during gastric digestion. Meanwhile, fermentation with p7 can greatly improve the release of soluble protein and increase the contents of free essential amino acids, such as lysine(increased by 12 folds) and methionine(increased by 10 folds).

关键词： Rapeseed meal Glucosinolates Fermentation Lactic acid bacteria In vitro digestion

General theory for designing phonon transport in alloyed/doped materials

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Science China(Physics,Mechanics & Astronomy) 2024年

作者： Chenhan Liu Chao Wu Wei Liu Yunshan Zhao Gang Zhang Hongmin Yang Yunfei Chen Micro-and Nano-scale Thermal Measurement and Thermal Management Laboratory Key Laboratory of Numerical Simulation for Large Complex Systems Ministry of Education School of Energy and Mechanical Engineering Nanjing Normal University School of Electrical and Automation engineering Nanjing Normal University Phonon engineering Research Center of Jiangsu Province Center for Quantum Transport and Thermal Energy Science Institute of Physics Frontiers and Interdisciplinary Sciences School of Physics and Technology Nanjing Normal University Institute of High-Performance Computing Agency for Science Technology and ResearchSingapore Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments School of Mechanical Engineering Southeast University

Alloying/doping is a widely used technique for improving the electrical, mechanical, and optical properties of ***, this technology induces significant distortions in the lattice structure, mass distribution, and potential field, greatly enhancing phonon scattering. Here, we introduce the concept of alloying/doping path and employ crystal symmetry, lattice deformation, and electron distribution to characterize it. Based on this new concept, the phonon thermal transport behavior in alloyed/doped materials can be well designed, and along different alloying/doping paths, the difference in thermal conductivity can be up to 45 times. On one hand, strategic alloying/doping that combines high crystal symmetry, large lattice contraction, and the same electron distribution suppresses phonon-phonon scattering phase space, induces phonon stiffening, and bolsters electronic structure symmetry, respectively. These synergistic effects significantly improve thermal conductivity. On the other hand, random alloying/doping has a low symmetry, leading to the typical “U” shape of alloying/doping level-dependent thermal conductivity. Our theory is corroborated in three-dimensional（3D） Si, 2D MoS2, and quasi-1D TiS3, affirming its efficacy and broad applicability in controlling phonon transport.

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Solar neutrino background in high-pressure gaseous ^(82)SeF_(6) TPC neutrinoless double beta decay experiments

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Chinese Physics C 2024年第4期48卷 20-33页

作者：王杰妙汪虎林张冬亮 PLAC Key Laboratory of Quark and Lepton Physics(MOE)Central China Normal UniversityWuhan 430079China Hubei Provincial engineering Research Center of Silicon Pixel Chip&Detection Technology Wuhan 430079China

In this study,the possibility of observing a solar neutrino background in a future neutrinoless double beta decay experiment using a high-pressure gaseous ^(82)SeF_(6) TPC is *** contributions are simulated,and possible features that could be used for event classification are discussed;two types of backgrounds are *** rate of multi-site background events is approximately 0.63 events/(ton·yr)in a 30 keV ROI *** background could be effectively reduced to less than 0.0001 events/(ton·yr)(95%C.L.)while maintaining a high signal efficiency of 93%by applying a selection based on the number of clusters and energy of the leading *** rate of the single-electron background events is approximately 0.01 events/(ton·yr)in the *** a reduction factor of 10 for the single-electron background events obtained via the algorithms developed for radioactive background rejection,the total background induced by the solar neutrino would be 0.001 events/(ton·yr),which is sufficiently small for conducting ton-level experiments.

关键词： neutrinoless double beta decay SeF6 high-pressure TPC solar neutrino

Quantifying the dissolution of nanomaterials at the nano-bio interface

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Science China Chemistry 2015年第5期58卷 761-767页

作者： Junzhe Zhang Xiao He Peng Zhang Yuhui Ma Yayun Ding Zhenyu Wang Zhiyong Zhang College of Environmental Science and engineering Ocean University of China Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety Key Laboratory of nuclear Radiation and nuclear Energy Technology Institute of High Energy Physics Chinese Academy of Sciences

With the rapid development of nanoscience and nanotechnology, more engineered nanomaterials(NMs) are being released into the environment. Such releases might lead to unwanted exposure. The dissolution of NMs at nano-bio interfaces is one of the most noteworthy causes of the toxicity of dissolvable NMs. A growing number of studies are focusing assessing NMs dissolution during exposure tests. This mini review considers recent developments in the quantitative tools for the assessment of NMs dissolution, and highlights the critical points in the evaluation of the toxicity of dissolvable NMs.

关键词： nanomaterials nano-bio interface dissolution ions toxicology