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New high-T_c iron-selenide superconductor with hydroxide spacer layers

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Science China Materials 2015年第1期58卷 1-2页

作者： Guang-han cao Department of Physics Zhejiang University

Iron-based superconductors include pnictides and *** far,the chalcogenides are much fewer in number[1],thus it is particularly valuable to find new superconductors in iron chalcogenides,for the'ultimate'understanding of iron-based *** tetragonal binary iron selenide(β-Fe1+δSe)is the structurally simplest iron-based superconductor with a superconducting critical temperature(Tc)of 8.5 K at ambient pressure[2].By intercalation of alkali metal ions into

关键词： high New high-T_c iron-selenide superconductor with hydroxide spacer layers Chen

Carbon dioxide copolymers:Emerging sustainable materials for versatile applications

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SusMat 2021年第1期1卷 88-104页

作者： han cao Xianhong Wang Key Laboratory of Polymer Ecomaterials Chinese Academy of SciencesChangchun Institute of Applied ChemistryChangchunP.R.China University of Science and Technology of China HefeiP.R.China

Carbon dioxide(CO_(2))is cheap,renewable,abundant,and nontoxic carbon feedstocks in chemical *** the past two decades,utilization of CO_(2)in polymer science has become a meaningful topic bridging two separate subjects,namely CO_(2)valorization and sustainable polymer *** review summarizes the recent progress in CO_(2)copolymer materials from synthesis to material performance adjustment,focusing on commercialized or potential commodity sustainable materials such as biodegradable polycarbonates and new structure polyurethanes from CO_(2)-polyol building blocks.

关键词： synthesis. dioxide versatile

Superconductivity with peculiar upper critical fields in quasi-one-dimensional Cr-based pnictides

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Chinese Physics B 2018年第10期27卷 15-26页

作者： Guang-han cao Zeng-Wei Zhu Department of Physics Zhejiang University Hangzhou 310027 China Wuhan National High Magnetic Field Center School of Physics Huazhong University of Science and Technology Wuhan 430074 China

The discovery of superconductivity in quasi-one-dimensional Cr-based pnictides A2Cr3As3（A = alkali metals） has generated considerable research interest, primarily owing to their reduced dimensionality, significant electron correlations,and possible unconventional superconductivity. The upper critical field（Hc2） provides important information on the superconducting pairing. In this paper, we first briefly overview the latest research progress on the Cr-based ***, we introduce typical Hc2（T） behaviors of type-II superconductors in relation with the pair-breaking *** a description of the measurement method for Hc2, we focus on the analysis of Hc2 data, especially for the temperature and angle dependence, in K2Cr3As3 crystals. The result indicates（i） an absence of Pauli-paramagnetic pair breaking for field perpendicular to the Cr3As3 chains, and（ii） a unique threefold modulation for the in-plane Hc2Φ profile. Finally we conclude with remarks on the possible unconventional superconducting pairing symmetry.

关键词： Cr-based superconductors upper critical fields unconventional superconductivity

Online Monitoring Method for Junction Temperature of SiC MOSFETs based on Temperature Sensitive Electrical Parameter

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CSEE Journal of Power and Energy Systems 2024年第4期10卷 1799-1807页

作者： han cao Puqi Ning Yunhao Huang Xuhui Wen Wuhan Second Ship Design and Research Institute Wuhan 430205China Key Laboratory of Power Electronics and Electric Drive Institute of Electrical EngineeringChinese Academy of SciencesBeijing 100190China Institute of Electrical Engineering Chinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China Collaborative Innovation Center of Electric Vehicles in Beijing Beijing 100081China

Compared to Si devices,the junction temperature of SiC devices is more critical due to the reliability concern introduced by immature packaging technology applied to new *** paper proposes a practical SiC MOSFET junction temperature monitoring method based on the on-state voltage$\\boldsymbol{V}_{\\mathbf{ds}(\\mathbf{on})}$*** Section II of the paper,the temperature sensitivity of the on-state voltage$\\boldsymbol{V}_{\\mathbf{ds}(\\mathbf{on})}$is *** hardware of the measurement system is set up in Section III,which consists of an On-state Voltage Measurement Circuit(OVMC),the sampling and isolation ***,a calibration method based on the self-heating of the SiC MOSFET chip is presented in Section *** the final Section,the junction temperature is monitored synchronously according to the calibration *** proposed method is applied to a Buck converter and verified by both an Infrared Radiation(IR)camera and a Finite Element Analysis(FEA)tool.

关键词： Junction temperature Silicon Carbide(SiC)MOSFET TSEP

Environmentally benign metal catalyst for the ring-opening copolymerization of epoxide and CO_(2): state-of-the-art, opportunities, and challenges

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Green Chemical Engineering 2022年第2期3卷 111-124页

作者： han cao Shunjie Liu Xianhong Wang Key Laboratory of Polymer Ecomaterials Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun130022China

Carbon dioxide(CO_(2))is the main greenhouse gas,whereas it is also a nontoxic,abundant,cheap carbon and oxygen *** copolymerization of CO_(2) with epoxide presents a sustainable approach to the synthesis of biodegradable polymers,which upcycles the waste into *** complex catalyst plays the central role in the reaction,since it provides oxophilic and Lewis acidic active center both for monomer activation and chain end stabilization,and nucleophiles as Lewis base for ***,heavy metal catalyst with certain toxicity such as cobalt undisputedly dominates the copolymerization catalysis which comprises the overall *** circumvent the potential environmental hazard,developing highly active catalyst composed of green metals is of great importance especially when the polymer was utilized for agriculture *** work reviews the development of sustainable metal catalysts for the production of CO_(2) copolymer,centered by Al,Mg,Ti,Fe,generally acknowledged as low toxic,environmentally benign,biocompatible,and also abundant in earth's *** is placed in recent five years where several historic examples are also included to construct a full picture of the sustainable catalysis explored to date.

关键词： Green catalysis Aluminum catalyst Sustainable polymer CO_(2)valorization Ring-opening polymerization

Immune Responses to Varicella-Zoster Virus Glycoprotein E Formulated with Poly(Lactic-co-Glycolic Acid) Nanoparticles and Nucleic Acid Adjuvants in Mice

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Virologica Sinica 2021年第1期36卷 122-132页

作者： Yunfei Wang Jialong Qi han cao Cunbao Liu Institute of Medical Biology Chinese Academy of Medical Sciences and Peking Union Medical CollegeKunming 650118China

The subunit herpes zoster vaccine Shingrix is superior to attenuated vaccine Zostavax in both safety and efficacy,yet its unlyophilizable liposome delivery system and the limited supply of naturally sourced immunological adjuvant QS-21 still need to be *** on poly(lactic-co-glycolic acid)(PLGA)delivery systems that are stable during the lyophilization and rehydration process and using a double-emulsion(w/o/w)solvent evaporation method,we designed a series of nanoparticles with varicella-zoster virus antigen glycoprotein E(VZV-g E)as an antigen and nucleic acids including polyinosinic-polycytidylic acid(Poly I:C)and phosphodiester Cp G oligodeoxynucleotide(Cp G ODN),encapsulated as immune *** cationic lipids(DOTAP)have more potential than neutral lipids(DOPC)for activating g E-specific cell-mediated immunity(CMI)in immunized mice,especially when g E is encapsulated in and presented on the surface of nanoparticles,PLGA particles without lipids have the greatest potential to induce not only the highest g Especific Ig G titers but also the strongest g E-specific CMI responses,including the highest proportions of interferon-c(IFNc)-and interleukin-2(IL-2)-producing CD4?/CD8?T cells according to a flow cytometry assay and the greatest numbers of IFN-c-and IL-2-producing splenocytes according to an enzyme-linked immunospot(ELISPOT)*** results showed that immune-stimulating nucleic acids together with the PLGA delivery system showed promise as a safe and economical varicella and zoster vaccine candidate.

关键词： Varicella-zoster virus subunit vaccine Cell-mediated immunity Nucleic acid immune stimulator Poly I:C CpG ODN PLGA Nanoparticle

Process Evaluation, Tensile Properties and Fatigue Resistance of Chopped and Continuous Fiber Reinforced Thermoplastic Composites by 3D Printing

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Journal of Renewable Materials 2022年第2期10卷 329-358页

作者： Wei Chen Qiuju Zhang han cao Ye Yuan School of Mechanical Engineering Jiangnan UniversityWuxi214122China Jiangsu Province Key Laboratory of Advanced Food Manufacturing Equipment and Technology Jiangnan UniversityWuxi214122China

The aim of this article was to comprehensively evaluate the manufacturing process,tensile properties and fatigue resistance of the chopped and continuous fiber reinforced thermoplastic composites(CFRTPCs)by 3D *** main results included:the common defects of the printed CFRTPCs contained redundant and accumulation defects,scratch and warping defects;the continuous fiber contributed to the dimensional stability and accuracy of width and thickness;associations between mass percentage of fiber reinforcement and the averages of elastic mod-ulus,strain at break and ultimate tensile strength were approximately linear based on tensile test results;the fati-gue resistance improved with the increasing fiber reinforcement based on fatigue test *** for specimens with four fiber rings,there was a good linear relationship between the stress level and logarithm value of cycles during the whole life while those of pure matrix and specimens with one and two fiber rings were piecewise linear,taking about 10,000 cycles as *** micro morphology showed that the fatigue failure behaved as matrix fracture,large and small fiber bundles and single fibers extracted from *** the tension-tension fatigue load,the deformations where easily concentrating stress behaved as sunken surfaces along thickness and width directions,and the deformation along width direction was greater than that along thickness direction.

关键词： CFRTPCs 3D printing tensile test fatigue behavior stress level micro morphology

Synthesis,Structure and Properties of Layered Phosphide Nitrides AkTh_(2)Mn_(4)P_(4)N_(2)(Ak=Rb,Cs)

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Chinese Journal of Chemistry 2021年第10期39卷 2873-2880页

作者： Bai-Zhuo Li Si-Qi Wu Zhi-Cheng Wang cao Wang Guang-han cao Department of Physics Zhejiang Province Key Laboratory of Quantum Technology and DevicesInterdisciplinary Center for Quantum Informationand State Key Lab of Silicon MaterialsZhejiang UniversityHangzhouZhejiang310027 China School of Physics&Optoelectronic Engineering Shandong University of TechnologyZiboShandong 255000China Collaborative Innovation Centre of Advanced Microstructures Nanjing UniversityNanjingJiangsu210093 China

Main observation and conclusion We report the design,synthesis,structure,and properties of two complex layered phosphide nitrides,AkTh_(2)Mn_(4)P_(4)N_(2)(Ak=Rb,Cs),which contain anti-fluorite-type[Mn_(2)P_(2)]bilayers separated by fluorite-type[Th_(2)N_(2)]layers as a result of the intergrowth between AkMn2P2 and *** new compounds are featured with an intrinsic hole doping associated with the interlayer charge transfer and a built-in chemical pressure from the[Th_(2)N_(2)]layers,both of which are reflected by the changes in the lattice and the atomic position of *** measurements of magnetic susceptibility,electrical resistivity,and specific heat indicate existence of local moments as well as itinerant electrons in relation with d-p *** expected dominant antiferromagnetic interactions with enhanced d-p hybridizations were demonstrated by the first-principles calculations only when additional Coulomb repulsions are *** density of states at the Fermi level derived from the specific-heat analysis are 3.5 and 7.5 times of the calculated ones for Ak=Rb and Cs,respectively,suggesting strong electron correlations in the title compounds.

关键词： Intercalations Synthetic methods Physical properties Phosphide nitrides Electronic structure

Pulmonary cryptococcosis after immunomodulator treatment in patients with Crohn’s disease:Three case reports

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World Journal of Gastroenterology 2023年第4期29卷 758-765页

作者： Yan-Fei Fang Xiang-han cao Ling-Ya Yao Qian cao Department of Gastroenterology Inflammatory Bowel Disease CenterSir Run Shaw HospitalCollege of Medicine Zhejiang UniversityHangzhou 310016Zhejiang ProvinceChina

BACKGROUND Corticosteroids and anti-tumor necrosis factorαmAbs are widely used to treat Crohn's disease(CD).However,one disadvantage of this treatment is impairment of normal immune function,leading to an increased risk of *** infection is an opportunistic infection that occurs mainly in immunocompromised patients and poses a significant diagnostic challenge in patients with *** SUMMARY Here,we report three cases of pulmonary cryptococcosis in patients with CD after receiving immunomodulatory *** patients presented with no or mild respiratory *** computed tomography scans revealed pulmonary nodules in the unilateral or bilateral *** were made using pathological examination and metagenomic *** patients were treated with fluconazole 400 mg once daily for 1 to 6 mo,and symptoms were *** searches were conducted in PubMed,Web of Science,and Embase to retrieve previously reported cases and summarize patient *** The incidence of cryptococcus infection has increased along with immunomodulator *** vigilance is required for early identification and standardized treatment.

关键词： Crohn’s disease Immunomodulator Infliximab Opportunistic infections Pulmonary cryptococcosis Case report