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Indium-doped perovskite-related cesium copper halide scintillator films for high-performance X-ray imaging

Photonics Research 2024年第2期12卷 369-376页

作者： RUI LIU ZHIYONG LIU CHENGXU LIN GUANGDA NIU xuning zhang BO SUN TIELIN SHI GUANGLAN LIAO State Key Laboratory of Digital Manufacturing Equipment and Technology Huazhong University of Science and TechnologyWuhan 430074China Wuhan National Laboratory for Optoelectronics and School of Optical and Electronic Information Huazhong University of Science and TechnologyWuhan 430074China School of Aerospace Engineering Huazhong University of Science and TechnologyWuhan 430074China

Scintillators are widely utilized in high-energy radiation detection in view of their high light yield and short fluorescence decay ***,constrained by their current shortcomings,such as complex fabrication procedures,high temperature,and difficulty in the large scale,it is difficult to meet the increasing demand for costeffective,flexible,and environment-friendly X-ray detection using traditional ***-related cesium copper halide scintillators have recently received multitudinous research due to their tunable emission wavelength,high photoluminescence quantum yield(PLQY),and excellent optical ***,we demonstrated a facile solution-synthesis route for indium-doped all-inorganic cesium copper iodide(Cs_(3)Cu_(2)I_(5))powders and a high scintillation yield flexible film utilizing indium-doped Cs_(3)Cu_(2)I_(5)*** large area flexible films achieved a PLQY as high as 90.2%by appropriately adjusting the indium doping concentration,much higher than the undoped one(73.9%).Moreover,benefiting from low self-absorption and high PLQY,the Cs_(3)Cu_(2)I_(5):In films exhibited ultralow detection limit of 56.2 n Gy/s,high spatial resolution up to 11.3 lp/mm,and marvelous relative light output with strong stability,facilitating that Cs_(3)Cu_(2)I_(5):In films are excellent candidates for X-ray medical *** work provides an effective strategy for developing environment-friendly,low-cost,and efficient scintillator films,showing great potential in the application of highperformance X-ray imaging.

关键词： properties copper halide

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An emerging terpolymeric nanoparticle pore former as an internal recrystallization inhibitor of celecoxib in controlled release amorphous solid dispersion beads:Experimental studies and molecular dynamics analysis

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Acta Pharmaceutica Sinica B 2024年第6期14卷 2669-2684页

作者： Jamie Anne Lugtu-Pe xuning zhang Sako Mirzaie Hao Han R.Chang Nour AL-Mousawi Kuan Chen Yongqiang Li Anil Kane Daniel Bar-Shalom Xiao Yu Wu Advanced Pharmaceutics and Drug Delivery Laboratory Leslie Dan Faculty of PharmacyUniversity of TorontoToronto M5S 3M2Canada Candoo Pharmatech Company Inc. Mississauga L5N 5M1Canada Department of Pharmacy University of CopenhagenCopenhagen DK-2100Denmark Patheon by Thermo Fisher Scientific Toronto Region Operations(TRO)Mississauga L5N 3X4Canada

Solid oral controlled release formulations feature numerous clinical advantages for drug candidates with adequate solubility and dissolution ***,most new chemical entities exhibit poor water solubility,and hence are exempt from such *** combining drug amorphization with controlled release formulation is promising to elevate drug solubility,like other supersaturating systems,the problem of drug recrystallization has yet to be resolved,particularly within the dosage ***,we explored the potential of an emerging,non-leachable terpolymer nanoparticle(TPN)pore former as an internal recrystallization inhibitor within controlled release amorphous solid dispersion(CRASD)beads comprising a poorly soluble drug(celecoxib)reservoir and insoluble polymer(ethylcellulose)*** to conventional pore former,polyvinylpyrrolidone(PVP),TPN-containing membranes exhibited superior structural integrity,less crystal formation at the CRASD bead surface,and greater extent of celecoxib ***-atom molecular dynamics analyses revealed that in the presence of TPN,intra-molecular bonding,crystal formation tendency,diffusion coefficient,and molecular flexibility of celecoxib were reduced,while intermolecular H-bonding was increased as compared to *** work suggests that selection of a pore former that promotes prolonged molecular separation within a nanoporous controlled release membrane structure may serve as an effective strategy to enhance amorphicity preservation inside CRASD.

关键词： Controlled release amorphous solid dispersion Poorly soluble drug Internal recrystallization Membrane-reservoir coated beads Molecular dynamics simulation Effect of pore formers Terpolymer nanogel Drug-polymer interactions

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浅析中式园林元素与现代风格家居融合设计中的应用

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鞋类工艺与设计 2024年第6期4卷 148-150页

作者：章旭宁南京视觉艺术职业学院江苏南京211300

利用中式园林的构成元素(石与草、水与花、灯与影)将其打散、重构,与现代风格家居设计有机地结合,让室外景观园林自然与放松的氛围通过室内庭院的形态延伸到室内环境中的同时,借鉴中式庭院空间互借的建筑布局方式,充分利用室内空间的互... 详细信息

利用中式园林的构成元素(石与草、水与花、灯与影)将其打散、重构,与现代风格家居设计有机地结合,让室外景观园林自然与放松的氛围通过室内庭院的形态延伸到室内环境中的同时,借鉴中式庭院空间互借的建筑布局方式,充分利用室内空间的互借。不仅可以扩大空间的视觉感受,还赋予空间精神文化价值,继承传统,变革创新,形成更多元化的现代室内空间。本设计运用“以人为本”的设计理念,同时积极响应“绿色可持续发展”现代化的设计需求,旨在为现代家居设计提供新的思路。

关键词：现代室内设计庭院式住宅庭院空间生态化设计中式园林

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天然气气化炉内介质乙二醇非稳态耦合热流场研究

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重庆工商大学学报（自然科学版） 2024年第4期41卷 53-60页

作者：张栩宁郭韵上海工程技术大学机械与汽车工程学院上海201620

目的在天然气工业化应用中,液化天然气的高效气化是关键影响因素,为了在国家能源改革的大背景下,尽可能提升现有气化设备的运行效能,采用ANSYS Fluent软件对一种采用乙二醇作为中间载热介质的天然气气化炉内非稳态耦合热流场进行数值模... 详细信息

目的在天然气工业化应用中,液化天然气的高效气化是关键影响因素,为了在国家能源改革的大背景下,尽可能提升现有气化设备的运行效能,采用ANSYS Fluent软件对一种采用乙二醇作为中间载热介质的天然气气化炉内非稳态耦合热流场进行数值模拟。方法通过深入研究天然气气化炉传热传质机理,在总结前人研究仅考虑对流换热情况不足的情况下,将辐射换热加以考虑,构建出大空间非稳态自然对流及介质参与性辐射耦合传热模型,通过天然气加热、传热流动试验装置,对边界条件进行实验校准,验证数值分析模型的正确性。结果中间载热介质为乙二醇的气化炉运行时长达到2.0 h后,传热量趋于稳定,内部热流场不再发生明显扰动,表明气化炉进入稳定运行阶段,此时炉内整体加热效率仅为87.35%,其中介质参与性辐射占总传热量的27.01%,气化炉底部形成了范围较小的低温带,表明该工况下其内部运行存在难以消除的流动死角。结论在本文设置的工况下,大筒体天然气气化炉内部流场分布情况不佳,气化炉的加热效率和启动时间有待进一步优化,炉内主要换热形式仍是自然对流,但不可忽略介质参与性辐射对总传热的贡献。

关键词：加热气化非稳态耦合传热模型加热效率

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Bio-inspired manufacturing of superwetting surfaces for fog collection and anti-icing applications

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Science China(Technological Sciences) 2022年第9期65卷 1975-1994页

作者： zhang xuning GAN Lang SUN Bo LIU ZhiYong LIAO GuangLan SHI TieLin State key Laboratory of Digital Manufacturing Equipment and Technology Huazhong University of Science and TechnologyWuhan 430074China

As a century-old concept,superwettability has aroused the interest of researchers in the past decades,attributed to the discoveries of the mechanisms of special wetting phenomena in ***-inspired manufacturing of superwetting surfaces for fog collection and anti-icing applications has become mainstream research,potentially alleviating the problem of water shortage and ice *** surfaces for fog collection and anti-icing applications involve a reverse process,in which the former gathers water spontaneously,while the latter repels *** analysis of the two is essential for the comprehensive understanding of superhydrophilic/superhydrophobic surfaces and boosting their ***,wetting theories and basic mechanisms for fog collection and anti-icing are briefly ***,manufacturing methods of bionic structures and surfaces are systematically reviewed after discussing the typical organisms with ***,conclusions are drawn and prospects for future development are proposed.

关键词： bionic manufacturing superwettability fog collection anti-icing

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Insight into the Inhibition of the Poisonous Sulfide Production from Sulfate-Reducing Microbiota in Mariculture Habitat

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Journal of Ocean University of China 2024年第2期23卷 447-454页

作者： ZHAO xuning zhang Zhiming ZHAO Yangguo MUPINDU Progress Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering(MEGE) College of Environmental Science and EngineeringOcean University of ChinaQingdao 266100China Key Laboratory of Marine Environmental Science and Ecology(Ocean University of China) Ministry of EducationQingdao 266100China

The production of toxic sulfides is a common environmental problem in ***,the effective inhibition of sulfidogens is the key to prevent sulfides *** this study,the possibility and mechanism of nitrate(NO_(3)^(−))inhibiting the activity of the sulfate-reducing microbiota(SRM)from mariculture sediments was *** results showed that 1,3,and 5 mmol L^(−1)NO_(3)^(−)continuously inhibited sulfide production for 1-3 *** NO_(3)^(−) dosage increased to 7 mmol L^(−1),the duration of inhibition increased to 6 *** product NO_(2)^(−)heavily inhibited the activity of dissimilar sulfate reductase gene(dsrB)by 3 orders,which was the main reason that the sulfate-reducing activity was *** SRM structure changed significantly with the dosage of NO_(3)^(−),while the abundance of sulfidogens Desulfovibrio species increased due to their capability of detoxifying nitrite through nitrite ***,sulfidogens Desulfovibrio species are more adaptable to a high nitrate/nitrite environment,and the traditional control strategies by dosing nitrate/nitrite should be paid more attention *** findings will serve as helpful guidelines for sulfate-reducing microbiota in the habitat of mariculture to reduce their generation of poisonous sulfide.

关键词： sulfate-reducing microbiota sulfide nitrate Desulfovibrio mariculture

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Mechanism of internal thermal runaway propagation in blade batteries

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Journal of Energy Chemistry 2024年第2期89卷 184-194,I0005页

作者： xuning Feng Fangshu zhang Wensheng Huang Yong Peng Chengshan Xu Minggao Ouyang School of Vehicle and Mobility Tsinghua UniversityBeijing 100084China

Blade batteries are extensively used in electric vehicles,but unavoidable thermal runaway is an inherent threat to their safe *** study experimentally investigated the mechanism underlying thermal runaway propagation within a blade battery by using a nail to trigger thermal runaway and thermocouples to track its propagation inside a *** results showed that the internal thermal runaway could propagate for up to 272 s,which is comparable to that of a traditional battery *** velocity of the thermal runaway propagation fluctuated between 1 and 8 mm s^(-1),depending on both the electrolyte content and high-temperature gas *** the early stages of thermal runaway,the electrolyte participated in the reaction,which intensified the thermal runaway and accelerated its *** the battery temperature increased,the electrolyte evaporated,which attenuated the acceleration *** diffusion affected thermal runaway propagation through both heat transfer and mass *** experimental results indicated that gas diffusion accelerated the velocity of thermal runaway propagation by 36.84%.We used a 1D mathematical model and confirmed that convective heat transfer induced by gas diffusion increased the velocity of thermal runaway propagation by 5.46%-17.06%.Finally,the temperature rate curve was analyzed,and a three-stage mechanism for internal thermal runaway propagation was *** Stage I,convective heat transfer from electrolyte evaporation locally increased the temperature to 100℃.In Stage II,solid heat transfer locally increases the temperature to trigger thermal *** StageⅢ,thermal runaway sharply increases the local *** proposed mechanism sheds light on the internal thermal runaway propagation of blade batteries and offers valuable insights into safety considerations for future design.

关键词： Lithium-ion battery Blade battery Thermal runaway Internal thermal runaway propagation

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Implementation of 1.7 kV Silicon Carbide Metal Oxide Semiconductor Field Effect Transistors in Auxiliary Power Supplies for Industrial Applications

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Chinese Journal of Electrical Engineering 2020年第3期6卷 46-55页

作者： xuning zhang Gin Sheh Littelfuse Inc.Round Rock TX 78681USA

An auxiliary power supply(Aux-PS)has become an essential component of electronic equipment for many industrial applications,such as in motor drives,photovoltaic(PV)inverters,uninterruptible power supply(UPS)systems and modular multilevel *** introduction of 1700 V silicon carbide(SiC)metal oxide semiconductor field effect transistors(MOSFETs)is useful for such applications,providing benefits with respect to a low on-state resistance,smaller package,low switching loss and single-switching implementation.A single end flyback Aux-PS is designed for industrial applications with a wide input voltage range using 1.7 kV SiC *** special design tradeoffs involved in the usage of SiC MOSFETs are discussed in detail,such as those with regard to gate driving voltage selection,isolation transformer design considerations,and clamping circuit design details.A 60 W demonstration hardware is developed and tested under different working *** results verify the higher efficiency and better thermal performance of the proposed hardware relative to those of traditional Si solutions.

关键词： Silicon carbide MOSFET wide input range auxiliary power supply

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On the Understandings of Dielectric Constant and Its Impacts on the Photovoltaic Efficiency in Organic Solar Cells

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Chinese Journal of Chemistry 2021年第2期39卷 381-390页

作者： Zihao Fu xuning zhang Hong zhang Yanxun Li Huiqiong Zhou Yuan zhang School of Chemistry Beijing Advanced Innovation Center for Biomedical EngineeringBeihang UniversityNo.37 Xueyuan RoadBeijing100191 China Key Laboratory of Nanosystem and Hierachical Fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing100190 China

Dielectric constant(ε)is an important parameter affecting the power conversion efficiency of organic solar cells(OSC).Increasingεof bulk heterojunctions in general can benefit the performance of OSCs,as an increasedεwill reduce the influence of Coulomb interaction between weakly bound electron-hole pairs on charge-transfer states or bimolecular recombination involving mobile carriers to reduce geminate and nongeminate *** this review,we overview the current understandings on dielectric constant and its impacts on exciton dissociation and voltage losses in OSCs and summarize recent efforts attempting to modify the dielectric properties of OSC materials through synthetic *** further discuss the commonly adopted techniques for determining the parameter ofεwith stressing the testing conditions that may affect the accuracy of *** last,we suggest that novel experimental methods to improve the dielectric constant and resultant physical processes in OSCs will be appreciated,which helps enrich the existing strategy reservoir toward enhancement of photovoltaic efficiencies.

关键词： Amorphous materials Donor-acceptor systems Energy conversion Nanostructures Photolysis

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Molecular dispersion enhances photovoltaic efficiency and thermal stability in quasi-bilayer organic solar cells

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Science China Chemistry 2021年第1期64卷 116-126页

作者： xuning zhang Yanxun Li Dongyang zhang Guangbao Wu Hong zhang Jiyu Zhou Xing Li Saud-uz-Zafar Jianqi zhang Zhixiang Wei Huiqiong Zhou Yuan zhang School of Chemistry\Beijing Advanced Innovation Center fo r Biomedical Engineering.Beihang University Beijing 100191China CAS Key Laboratory of Nanosvstem and Hierarchical Fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing 100190China

In comparison to widely adopted bulk heterojunction(BHJ)structures for organic solar cells(OSC),exploiting the sequential deposition to form planar heterojunction(PHJ)structures enables to realize the favorable vertical phase separation to facilitate charge extraction and reduce charge recombination in ***,effective tunings on the power conversion efficiency(PCE)in PHJ-OSCs are still restrained by the currently available *** on a polymeric donor PBDBT-2 F(PBDBT=Poly[[4,8-bis[5-(2-ethylhexyl)-4-fluoro-2-thienyl]benzo[1,2-b:4,5-b′]dithiophene-2,6-diyl]-2,5-thiophenediyl[5,7-bis(2-ethylhexyl)-4,8-dioxo-4 H,8 H-benzo[1,2-c:4,5-c′]dithiophene-1,3-diyl]-2,5-thiophenediyl])and a non-fullerene(NF)acceptor Y6,we proposed a strategy to improve the properties of photovoltaic performances in PHJ-based OSCs through dilute dispersions of the PBDBT-2 F donor into the acceptor-dominant phase with the sequential film *** the control of donor dispersions,the charge transport balance in the PHJ-OSCs is improved,leading to the expedited photocarrier sweep-out with reduced bimolecular charge *** a result,a PCE of 15.4%is achieved in the ***,the PHJ solar cells with donor dispersions exhibit better thermal stability than corresponding BHJ devices,which is related to the better film morphology robustness and less affected charge sweep-out during the thermal aging.

关键词： diluted donor dispersion sequential film deposition vertical phase separation thermal stability

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