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zrNiSn-based compounds with high thermoelectric performance and ultralow lattice thermal conductivity via introduction of multiscale scattering centers

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Journal of Materiomics 2024年第1期10卷 200-209页

作者： Ruonan Min Yanxia Wang Xue Jiang Rongchun Chen Mingyang Li Huijun Kang Xiong Yang Zongning Chen Enyu guo Tongmin Wang Key Laboratory of Solidification Control and Digital Preparation Technology(Liaoning Province) School of Materials Science and EngineeringDalian University of TechnologyDalian116024China Ningbo Institute of Dalian University of Technology Ningbo315000China Key Laboratory of Materials Modification by Laser Ion and Electron Beams(Dalian University of Technology)Ministry of EducationDalian116024China

The high lattice thermal conductivity of half-Heuslers(HHs)restricts the further enhancement of their thermoelectric figure-of-merit(ZT).In this study,multiscale scattering centers,such as point defects,dislocations,and nanoprecipitates,are synchronously introduced in a n-type zrNiSn-based HH matrix through Nb doping and Hf *** lattice thermal conductivity is substantially decreased from 4.55(for the pristine zrNiSn)to 1.8 W·m^(−1)·K^(−1) at 1123 K via phonon scattering over a broad wavelength range through the adjustment of multiscale *** value is close to the theoretically estimated lowest thermal *** power factor(PF)is enhanced from 3.25(for the pristine zrNiSn)to 5.01 mW·m^(−1)·K^(−2) for zr_(0.66)Hf_(0.30)Nb_(0.04)NiSn at 1123 K owing to the donor doping and band regulation via Nb doping and Hf *** can be ascribed to the synergistic interaction between the lowering of the lattice thermal conductivity and retention of the high ***,a ZT value of as high as 1.06 is achieved for zr_(0.66)Hf_(0.30)Nb_(0.04)NiSn at 1123 *** work demonstrates that these actions are effective in jointly manipulating the transport of electrons and phonons,thereby improving the thermoelectric performance through defect engineering.

关键词： Half-Heusler compounds Dislocation Lattice thermal conductivity Nano precipitated phase Mechanical properties

Coherent beam combining of two all‑PM thulium‑doped fiber chirped pulse amplifiers

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Frontiers of Optoelectronics 2024年第2期17卷 33-42页

作者： Bo Ren Hongxiang Chang Can Li Tao Wang Kaikai Jin Jiayi Zhang Kun guo Rongtao Su Jinyong Leng Pu Zhou College of Advanced Interdisciplinary Studies National University of Defense TechnologyChangsha 410073China Nanhu Laser Laboratory National University of Defense TechnologyChangsha 410073China Hunan Provincial Key Laboratory of High Energy Laser Technology National University of Defense TechnologyChangsha 410073China

In this paper,we report a coherent beam combining(CBC)system that involves two thulium-doped all-polarization maintaining(PM)fiber chirped pulse *** phase-locking the two channels via a fiber stretcher by using the stochastic parallel gradient descent(SPGD)algorithm,a maximum average power of 265 W is obtained,with a CBC efficiency of 81%and a residual phase error of λ/*** de-chirping by a pair of diffraction gratings,the duration of the combined laser pulse is compressed to 690 *** into account the compression efficiency of 90%and the main peak energy proportion of 91%,the corresponding peak power is calculated to be 4 *** laser noise characteristics before and after CBC are examined,and the results indicate that the CBC would degrade the low frequency relative intensity noise(RIN),of which the integration is 1.74%in[100 Hz,2 MHz]at the maximum combined output *** addition,the effects of the nonlinear spectrum broadening during chirped pulse amplification on the CBC efficiency are also investigated,showing that a higher extent of pulse stretching is effective in alleviating the spectrum broadening and realizing a higher output power with decent combining efficiency.

关键词： Coherent beam combining Thulium-doped fiber laser High-average power Chirped pulse amplifier

Assembling ionic liquid into porous molecular filler of mixed matrix membrane to trigger high gas permeability,selectivity,and stability for CO_(2)/CH_(4) separation

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Nano Research 2024年第5期17卷 4535-4543页

作者： Liting Yu Liqin Hao Yang Feng Jia Pang Mengwei guo Liangjun Li Weidong Fan Lili Fan Rongming Wang Zixi Kang Daofeng Sun School of Materials Science and Engineering State Key Laboratory of Heavy Oil ProcessingChina University of Petroleum(East China)Qingdao 266580China College of Chemistry Nankai UniversityTianjin 300071China College of Chemistry and Chemical Engineering China University of Petroleum(East China)Qingdao 266580China College of New Energy China University of Petroleum(East China)Qingdao 266580China

As an emerging zero-dimensional nano crystalline porous material,porous organic cages(POCs)with soluble properties in organic solvents,are promising candidates as molecular fillers in mixed matrix membranes(MMMs).The pore structure of POCs should be adjusted to trigger efficient gas separation performance,and the interaction between filler and matrix should be *** this work,ionic liquid(IL)was introduced into the molecular fillers of CC3,to construct the IL@CC3/PIM-1 membrane to effectively separate CO_(2) from CH_(4).The advantages of doping IL include:(1)narrowing the cavity size of POCs from 4.4 to 3.9Åto enhance the diffusion selectivity,(2)strengthening the CO_(2) solubility to heighten the gas permeability,and(3)improving the compatibility between filler and matrix to upgrade membrane *** the optimization of the membrane composite,the IL@CC3/PIM-1-10%membrane possesses the CO_(2) permeability of 7868 Barrer and the CO_(2)/CH_(4) selectivity of 73.4,which compared to the CC3/PIM-1-10%membrane,improved by 15.9%and 106.2%,***,the membrane has maintained a stable separation performance at varied temperatures and pressures during the long-term *** proposed method offers an efficient way to improve the performance of POCs-based MMMs in gas separation.

关键词： porous organic cage mixed matrix membrane ionic liquid gas separation

Controlled Synthesis and Phase Transition Mechanisms of Palladium Selenide:A First-Principles Study

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Precision Chemistry 2024年第10期2卷 545-552页

作者： Mingxiang Zhang Aixinye Zhang Hao Ren Wenyue guo Feng Ding Wen Zhao School of Materials Science and Engineering China University of Petroleum(East China)Qingdao 266580 ShandongChina Institute of Technology for Carbon Neutrality Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China Faculty of Materials Science and Energy Engineering Shenzhen University of Advanced TechnologyShenzhen 518055China

Using density functional theory,we carefully calculated the relative stability of monolayer,few-layer,and cluster structures with Penta Pd(Se)_(2),T-phase Pd(Se)_(2),and Pd_(2)Se_(3)-*** found that the stability of Penta Pd(Se)_(2) increases with the number of *** Penta Pd(Se)_(2),T-phase Pd(Se)_(2),and Pd_(2)Se_(3) monolayers are all semiconducting,with band gaps of 1.77,0.81,and 0.65 eV,*** formation energy of palladium selenide clusters with different phase structures is calculated,considering the cluster size,stoichiometry,and chemical *** typical experimental conditions,Pd_(2)Se_(3) phase clusters are found to be dominant,having the lowest formation energy among all of the phases considered,with this dominance increasing as cluster size *** the Pd−Se ratio in the environment allows for controlled synthesis of specific palladium selenide phases,providing theoretical insights into the nucleation mechanisms of Pd(Se)_(2) and other transition metal chalcogenides.

关键词： palladium selenide structural stability electronic properties cluster formation energy

原位自生相增强Ti-zr-Cu-Pd-Mo非晶复合材料的制备及其力学性能

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材料研究学报 2024年第2期38卷 105-110页

作者：余圣郭威吕书林吴树森华中科技大学材料科学与工程学院材料成形与模具技术国家重点实验室武汉430074 深圳华中科技大学研究院深圳518057 西安交通大学金属材料强度国家重点实验室西安710049

在Ti_(40)zr_(10)Cu_(36)Pd_(14)非晶合金基体中微添加β-Ti相稳定化元素Mo,使体系在凝固过程中原位析出塑性β-Ti相,制备出原位自生β-Ti相增强Ti基非晶复合材料。在这种复合材料的变形过程中塑性β-Ti相阻碍基体中主剪切带的扩展,使... 详细信息

在Ti_(40)zr_(10)Cu_(36)Pd_(14)非晶合金基体中微添加β-Ti相稳定化元素Mo,使体系在凝固过程中原位析出塑性β-Ti相,制备出原位自生β-Ti相增强Ti基非晶复合材料。在这种复合材料的变形过程中塑性β-Ti相阻碍基体中主剪切带的扩展,使其发生偏转和增殖生成多重剪切带,使其室温力学性能显著提高。其中(Ti_(0.4)zr_(0.1)Cu_(0.36)Pd_(0.14))_(95)Mo_(5)试样的室温强度达到2630 MPa,塑性应变达到7.3%,比基体分别提高了32.0%和508%。

关键词：金属材料非晶复合材料室温塑性剪切带

多元(U,zr, Nb)C燃料制备技术与性能机理研究

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原子能科学技术 2024年第1期58卷 166-174页

作者：吴学志魏国良郭骁中国原子能科学研究院反应堆工程技术研究所北京102413

多元(U,zr, Nb)C燃料因具有熔点高、热导率高、低裂变气体释放率及优异的高温力学性能等优点,是目前大功率空间核推进反应堆选用燃料之一。本文采用碳热还原和液相烧结相结合的粉末冶金工艺制备多元(U,zr, Nb)C燃料芯块,研究了工艺参数... 详细信息

多元(U,zr, Nb)C燃料因具有熔点高、热导率高、低裂变气体释放率及优异的高温力学性能等优点,是目前大功率空间核推进反应堆选用燃料之一。本文采用碳热还原和液相烧结相结合的粉末冶金工艺制备多元(U,zr, Nb)C燃料芯块,研究了工艺参数对烧结芯块反应动力学、相结构、导热性能和微观结构的作用机制和影响规律。结果表明:在1 800℃、50 MPa和1 h的烧结条件下,通过添加0.5%金属铀形成的液相烧结工艺制备得到芯块密度可达95.5%TD;当原料M/C(M为金属元素总量)摩尔比为1∶6.5时,可制备得到M/C比为1的正化学计量碳化物燃料;(U0.2,zr, Nb)C的晶格常数比(U0.1,zr, Nb)C的晶格常数略高;多元(U,zr, Nb)C碳化物燃料芯块热导率与相成分、密度和温度均有关;芯块气孔分布较均匀,没有联通的开气孔存在,气孔尺寸在1~3μm。

关键词：多元核推进燃料碳热还原液相烧结

The RING zinc finger protein LbRZF1 promotes salt gland development and salt tolerance in Limonium bicolor

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Journal of Integrative Plant Biology 2024年第4期66卷 787-809页

作者： Zongran Yang Ziwei Zhang Ziqi Qiao Xueying guo Yixuan Wen Yingxue Zhou Chunliang Yao Hai Fan Baoshan Wang guoliang Han Shandong Provincial Key Laboratory of Plant Stress College of Life SciencesShandong Normal UniversityJi'nan 250014China National Center of Technology Innovation for Comprehensive Utilization of Saline-Alkali Land Agricultural High-tech Industrial Demonstration Area of the Yellow River Delta of Shandong ProvinceDongying 257000China Dongying Institute Shandong Normal UniversityDongying 257000China

The recretohalophyte Limonium bicolor thrives in high-salinity environments because salt glands on the above-ground parts of the plant help to expel excess ***,we characterize a nucleus-localized C3HC4(RING-HC)-type zinc finger protein of *** named RING ZINC FINGER PROTEIN 1(LbRZF1).LbRZF1 was expressed in salt glands and in response to NaCl ***1 showed no E3 ubiquitin ligase *** phenotypes of overexpression and knockout lines for LbRZF1 indicated that LbRZF1 positively regulated salt gland development and salt tolerance in ***1 mutants had fewer salt glands and secreted less salt than did the wild-type,whereas LbRZF1-overexpressing lines had opposite phenotypes,in keeping with the overall salt tolerance of these plants.A yeast two-hybrid screen revealed that LbRZF1 interacted with LbCATALASE2(LbCAT2)and the transcription factor LbMYB113,leading to their *** of LbCAT2 or LbMYB113 decreased salt gland density and salt *** heterologous expression of LbRZF1 in Arabidopsis thaliana conferred salt tolerance to this *** also identified the transcription factor LbMYB48 as an upstream regulator of LbRZF1 *** study of LbRZF1 in the regulation network of salt gland development also provides a good foundation for transforming crops and improving their salt resistance.

关键词： LbRZF1 Limonium bicolor molecular mechanism salt gland development salt tolerance

Phenformin activates ER stress to promote autophagic cell death via NIBAN1 and DDIT4 in oral squamous cell carcinoma independent of AMPK

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International Journal of Oral Science 2024年第3期16卷 471-485页

作者： Dexuan Zhuang Shuangshuang Wang Huiting Deng Yuxin Shi Chang Liu Xue Leng Qun Zhang Fuxiang Bai Bin Zheng Jing guo Xunwei Wu School and Hospital of Stomatology Cheeloo College of MedicineShandong University&Shandong Key Laboratory of Oral Tissue Regeneration&Shandong Engineering Research Center of Dental Materials and Oral Tissue Regeneration&Shandong Provincial Clinical Research Center for Oral DiseasesJinanChina Engineering Laboratory for Biomaterials and Tissue Regeneration Ningbo Stomatology HospitalSavaid Stomatology SchoolHangzhou Medical CollegeNingboChina Cedars-Sinai Cancer Institute Department of Biomedical SciencesCedars-Sinai Medical CenterLos AngelesCAUSA

The efficient clinical treatment of oral squamous cell carcinoma(OSCC)is still a challenge that demands the development of effective new *** has been shown to produce more potent anti-tumor activities than metformin on different tumors,however,not much is known about the influence of phenformin on OSCC *** found that phenformin suppresses OSCC cell proliferation,and promotes OSCC cell autophagy and apoptosis to significantly inhibit OSCC cell growth both in vivo and in ***-seq analysis revealed that autophagy pathways were the main targets of phenformin and identified two new targets DDIT4(DNA damage inducible transcript 4)and NIBAN1(niban apoptosis regulator 1).We found that phenformin significantly induces the expression of both DDIT4 and NIBAN1 to promote OSCC ***,the enhanced expression of DDIT4 and NIBAN1 elicited by phenformin was not blocked by the knockdown of AMPK but was suppressed by the knockdown of transcription factor ATF4(activation transcription factor 4),which was induced by phenformin treatment in OSCC ***,these results revealed that phenformin triggers endoplasmic reticulum(ER)stress to activate PERK(protein kinase R-like ER kinase),which phosphorylates the transitional initial factor eIF2,and the increased phosphorylation of eIF2 leads to the increased translation of *** summary,we discovered that phenformin induces its new targets DDIT4 and especially NIBAN1 to promote autophagic and apoptotic cell death to suppress OSCC cell *** study supports the potential clinical utility of phenformin for OSCC treatment in the future.

关键词： drugs treatment AMPK DDI

Genome-Wide Exploration of the Grape GLR Gene Family and Differential Responses of VvGLR3.1 and VvGLR3.2 to Low Temperature and Salt Stress

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Phyton-International Journal of Experimental Botany 2024年第3期93卷 533-549页

作者： Honghui Sun Ruichao Liu Yueting Qi Hongsheng Gao Xueting Wang Ning Jiang Xiaotong guo Hongxia Zhang Chunyan Yu The Engineering Research Institute of Agriculture and Forestry Ludong UniversityYantai264025China College of Agriculture Ludong UniversityYantai264025China

Grapes,one of the oldest tree species globally,are rich in ***,environmental conditions such as low temperature and soil salinization signiﬁcantly affect grape yield and *** glutamate receptor(GLR)family,comprising highly conserved ligand-gated ion channels,regulates plant growth and development in response to *** this study,11 members of the VvGLR gene family in grapes were identiﬁed using whole-genome sequence *** methods were employed to analyze the basic physical and chemical properties,phylogenetic trees,conserved domains,motifs,expression patterns,and evolutionary *** and collinear analyses revealed that the VvGLRs were divided into three subgroups,showing the high conservation of the grape GLR *** members exhibited 2 glutamate receptor binding regions(GABAb and GluR)and 3-4 transmembrane regions(M1,M2,M3,and M4).Real-time quantitative PCR analysis demonstrated the sensitivity of all VvGLRs to low temperature and salt *** localization studies in Nicotiana tabacum veriﬁed that VvGLR3.1 and VvGLR3.2 proteins were located on the cell membrane and cell ***,yeast transformation experiments conﬁrmed the functionality of VvGLR3.1 and VvGLR3.2 in response to low temperature and salt ***ﬁndings highlight the signiﬁcant role of the GLR family,a highly conserved group of ion channels,in enhancing grape stress *** study offers new insights into the grape GLR gene family,providing fundamental knowledge for further functional analysis and breeding of stress-resistant grapevines.

关键词： Genome-wide identiﬁcation glutamate receptor(GLR)family low temperature stress salt stress grape