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Science China(Life Sciences) 2023年第6期66卷 1426-1439页

作者： Jiachao Zhou Thomas W Kuyper gu feng College of Resources and Environmental Sciences China Agricultural UniversityBeijing100193China Soil Biology Group Wageningen University&ResearchWageningen6700 AAThe Netherlands

Ecology seeks to explain species coexistence,but experimental tests of mechanisms for coexistence are difficult to *** synthesized an arbuscular mycorrhizal(AM)fungal community with three fungal species that differed in their capacity of foraging for orthophosphate(P)due to differences in soil *** tested whether AM fungal species-specific hyphosphere bacterial assemblages recruited by hyphal exudates enabled differentiation among the fungi in the capacity of mobilizing soil organic P(P_(o)).We found that the less efficient space explorer,Gigaspora margarita,obtained less ^(13)C from the plant,whereas it had higher efficiencies in P_(o)mobilization and alkaline phosphatase(Al Pase)production per unit C than the two efficient space explorers,Rhizophagusintraradices and Funneliformis *** AM fungus was associated with a distinct alp gene harboring bacterial assemblage,and the alp gene abundance and P_(o)preference of the microbiome associated with the less efficient space explorer were higher than those of the two other *** conclude that the traits of AM fungal associated bacterial consortia cause niche *** trade-off between foraging ability and the ability to recruit effective P_(o)mobilizing microbiomes is a mechanism that allows co-existence of AM fungal species in a single plant root and surrounding soil habitat.

关键词： arbuscular mycorrhizal fungi carbon space exploration hyphosphere bacterial assemblages organic phosphorus mobilization

Recent spinterfacial studies targeted to spin manipulation in molecular spintronic devices

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Chinese Physics B 2018年第10期27卷 96-106页

作者： xian-Rong gu Li-Dan guo xiang-Nan Sun CAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in Nanoscience National Center for Nanoscience and Technology Beijing 100190 China University of Chinese Academy of Sciences (CAS) Beijing 100049 China Department of Materials Science and Engineering College of New Energy and Materials China University of Petroleum Beijing Beijing 102249 China

Molecular spintronics is an emerging field which evoked wide research attention since the first molecule-based spintronic device has been reported at 2002. Due to the active study over the last few years, it is found that the interfaces in spintronic device, so called spinterface, is of critical importance for many key issues in molecular spintronics, such as enhancing spin injection, lengthening spin transport distance, as well as manipulating spin signals in molecular spintronic devices. Here in this review, recent studies regarding spinterface in molecular devices, especially those impressive efforts devoted on spin manipulation, have been systematically summarized and discussed.

关键词： molecular spintronics spin valve spinterface spin manipulation

Nanomedicine Disrupts Stromal Barriers to Augment Drug Penetration for Improved Cancer Therapy

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Chinese Journal of Chemistry 2024年第10期42卷 1175-1189页

作者： guo-feng Luo Wei-Hai Chen xian-Zheng Zhang state Key Laboratory of Oral&Maxillofacial Reconstruction and Regeneration Key Laboratory of Oral Biomedicine Ministry of EducationHubei KeyLaboratory of StomatologySchool&Hospital of StomatologyWuhan UniversityWuhanHubei 430079China Key Laboratoryof Biomedical Polymers of Ministry of Education&Departmentof Chemistry Wuhan UniversityWuhanHubei 430072China

Tumor stroma composing diverse extracellular matrixes(ECM)and stromal cells shapes a condensed physical barrier,which severely hampers the efficient accessibility of nanomedicine to tumor cells,especially these deep-seated in the core of *** barrier significantly compromises the antitumor effects of drug-loaded nanomedicine,revealing the remarkable importance of disrupting stromal barrier for improved tumor therapy with deep penetration *** achieve this goal,various nanoparticle-based strategies have been developed,including direct depleting ECM components via delivering anti-fibrotic agents or targeting stromal cells to suppress ECM expression,dynamic regulation of nanoparticles’physicochemical properties(i.e.,size,surface charge,and morphology),mechanical force-driven deep penetration,natural/biomimetic self-driven nanomedicine,and transcytosis-inducing *** these nanostrategies were systemically summarized in this review,and the design principles for obtaining admirable nanomedicine were *** the rapid development of nanotechnology,elaborate design of multifunctional nanomedicine provides new opportunities for overcoming the critical stromal barriers to maximize the therapeutic index of various therapies,such as chemotherapy,photodynamic therapy,and immunotherapy.

关键词： Nanomedicine Tumor stroma Deep penetration Enhanced drug perfusion Cancer therapy Drug carriers Biomaterials Nanotechnology

CARRIER PHOTOGENERATION IN POLY(N-VINYL-CARBAZOLE)-BASED PHOTOCONDUCTIVE THIN-FILM DEVICES

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Chinese Journal of Polymer Science 2006年第6期24卷 553-558页

作者： Hui Jin Yan-bing Hou xian-guo Meng feng Teng Key Laboratory of Luminescence and Optical Information Ministry of Education Institute of Optoelectronie Teehnology Beijing Jiaotong University Beijing 100044 China

In this paper, photoexcitation processes in the bilayer devices based on inorganic materials and poly（N-vinylcarbazole）（PVK） were investigated. In order to clarify the roles of inorganic materials in photoconductive properties of bilayer devices, TiO2 and ZnS were chosen to combine with PVK. A model for generation of photocurrent （Iph） in single layer device of PVK was obtained. It is deduced that the recombination rate constant （Pcomb） and the ionization rate constant （y） ofexcitons should be considered as the most important factors for Iph. For inorganic materials （TiO2 or ZnS）/PVK bilayer devices, in reverse bias of-4 V, the photocurrent of 115 mA/cm^2 in the TiO2/PVK device was observed, but the photocurrent in the ZnS/PVK device was only 10 mA/cma under the illumination light of 340 nm and the light intensity of 14.2 mW/cm^2. The weaker photocurrent is attributed to the absorption of ZnS within UV region and the energy offset at the interface between PVK and ZnS, which impedes the transport of charge carriers.

关键词： Polymer Inorganic semiconductor Photoconductive Photogeneration.

Template-free approach for hydrothermal fabrication of ZnO microspheres

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Particuology 2009年第3期7卷 225-228页

作者： Hao Jiang Junqing Hu feng gu Chunzhong Li Key Laboratory for Ultrafine Materials of Ministry of Education School of Materials Science and Engineering East China University of Science & Technology Shanghai 200237 China College of Materials Science and Engineering State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Donghua University Shanghai 200051 China

Wurtzite ZnO microspheres, 5.5-11 μm in diameter and with smooth surfaces, were prepared in absolute ethanol via a simple template-free method in the presence of ethylenediamine. The products were characterized using X-ray powder diffraction, scanning electron microscopy and transmission electron microscopy. This simple method to fabricate ZnO microspheres shows high yield （〉90%） and good reproducibiliry. The formation process of ZnO microspheres was discussed. The as-obtained ZnO microspheres are expected to provide some immediate advantages for optical, microelectronic, and biological applications.

关键词： Zinc oxide Hydrothermal crystal growth Microspheres

Large-scale synthesis of hollow titania spheres via flame combustion

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Particuology 2011年第6期9卷 632-636页

作者： Jie Liu Yanjie Hu feng gu Chunzhong Li Key Laboratory for Ultrafine Materials of Ministry of Education School of Materials Science and Engineering East China University of Science ＆ Technology Shanghai 200237 China

A one-step method for continuous large-scale synthesis of well-defined hollow titania spheres was established by feeding titanium tetrachloride mixed with ethanol vapor to a facile diffusion flame. A mixture of TiCl4 and C2H5OH vapor was transported at 100 m/s into a flame reactor and condensed into mesoscale droplets due to Joule-Thomson cooling and the entrainment of cool gases into the expanding high-speed jet. Hollow crystalline TiO2 spheres with good thermal stability were formed after the hydrolysis of TiCl4 in the H2/air flame at about 1500℃. Structural characterization indicates that the hollow spheres, with uniform diameter of 300 nm and shell thickness of 35 rim, consist of 20-30 nm TiO2 nanocrystallites. A formation mechanism of the hollow spheres was proposed, involving the competition between chemical reaction and diffusion during the flame process. The present study provides a new pathway for continuous and large-scale engineering of hollow nanomaterials.

关键词： Flame combustion Hollow spheres Titania Formation mechanism Large-scale

Health diagnosis of ultrahigh arch dam performance using heterogeneous spatial panel vector model

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Water Science and Engineering 2024年第2期17卷 177-186页

作者： Er-feng Zhao Xin Li Chong-shi gu The National Key Laboratory of Water Disaster Prevention Hohai UniversityNanjing 210098China NationalEngineering Research Centerof Water Resources Eficient Utilization and Engineering Safety Hohai UniversityNanjing 20098China

Currently,more than ten ultrahigh arch dams have been constructed or are being constructed in *** control is essential to long-term operation of these *** study employed the flexibility coefficient and plastic complementary energy norm to assess the structural safety of arch dams.A comprehensive analysis was conducted,focusing on differences among conventional methods in characterizing the structural behavior of the Xiaowan arch dam in ***,the spatiotemporal characteristics of the measured performance of the Xiaowan dam were explored,including periodicity,convergence,and time-effect *** findings revealed the governing mechanism of main ***,a heterogeneous spatial panel vector model was developed,considering both common factors and specific factors affecting the safety and performance of arch *** model aims to comprehensively illustrate spatial heterogeneity between the entire structure and local regions,introducing a specific effect quantity to characterize local deformation ***,the proposed model was applied to the Xiaowan arch dam,accurately quantifying the spatiotemporal heterogeneity of dam ***,the spatiotemporal distri-bution characteristics of environmental load effects on different parts of the dam were reasonably *** of the model prediction enhances its credibility,leading to the formulation of health diagnosis criteria for future long-term operation of the Xiaowan *** findings not only enhance the predictive ability and timely control of ultrahigh arch dams'performance but also provide a crucial basis for assessing the effectiveness of engineering treatment measures.

关键词： Ultrahigh arch dam Structural performance Deformation behavior Diagnosis criterion Panel data model

Epitaxial growth of Fe/Ag single crystal superlattices and their magnetic properties

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International Journal of Minerals,Metallurgy and Materials 2009年第1期16卷 71-76页

作者： Yu gu Fei Zeng Fang Lv Yu-li gu Pei-yong Yang feng Pan Laboratory of Advanced Materials Department of Materials Science and Engineering Tsinghua University Beijing 100084 China

Single crystal Fe/Ag（001） superlattices with various periodicities were fabricated using ultrahigh vacuum evaporation deposition. It was found that single crystal bcc Fe layers and single crystal fcc Ag layers can epitaxially grow on a single crystal Ag buffer layer alternately, which was deposited on NaCl single crystal chips by ion beam assisted deposition. The magnetic measurements of the superlattices reveal an oscillation coupling between ferromagnetism and antiferromagnetism as a function of the Ag layer thickness. The oscillation period, which is 1 nm （5 Ag layers）, is in good agreement with the calculated values when the Ag thickness is greater than 1.5 nm. While the thickness of the Ag spacer layer decreases to 1 nm, the oscillation coupling varies from calculations, which can be attributed to the intermixing of the interlayers according to the annealing results.

关键词： Fe/Ag superlattices magnetization oscillating periodicity annealing

High-Performance Biodegradable PBAT/PPC Composite Film Through Reactive Compatibilizer

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Chinese Journal of Polymer Science 2023年第7期41卷 1051-1058页

作者： feng-xiang Gao Yi Cai Shun-Jie Liu xian-Hong Wang University of Science and Technology of China Hefei230026China Key Laboratory of Polymer Ecomaterials Changchun Institute of Applied Chemistry CASChinese Academy of SciencesChangchun130022China

Poly(butylene adipate-co-terephthalate) (PBAT) is currently the largest commercial biodegradable plastics with good toughness and film forming properties, whereas, the inferior barrier and mechanical properties hinder its applications. Biodegradable poly(propylene carbonate) (PPC) with excellent barrier properties and high strength is a natural choice to address above issue. However, it is challenging to improve the compatibility of these two polymers. Herein, we prepared a reactive compatibilizer with double bond side group through terpolymerization of CO_(2)/propylene oxide/glycidyl methacrylate to enhance the properties of PBAT/PPC blends. Upon addition of 1 wt% compatibilizer, the PBAT/PPC blends (75/25, W/W) showed an increased water vapor barrier property changed from 424 g·m^(−2)·d^(−1) to 204 g·m^(−2)·d^(−1) compared to the control sample. Moreover, the tensile strength and elongation at break increased from 24.7 MPa to 30.3 MPa and from 858% to 1142%, respectively. The PBAT/PPC composite also displayed excellent biodegradability under composting conditions, as confirmed by the significantly decreased molecular weight. The present work provides an efficient way to barrier biodegradable film from PBAT of practical utilization.

关键词： Poly(butylene adipate-co-terephthalate) Poly(propylene carbonate) Reactive compatibilizer Barrier property Mechanical property

Concurrent recycling chemistry for cathode/anode in spent graphite/LiFePO_(4) batteries:Designing a unique cation/anion-co-workable dual-ion battery

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Journal of Energy Chemistry 2022年第1期31卷 166-171,I0005页

作者： Yun-feng Meng Hao-Jie Liang Chen-De Zhao Wen-Hao Li Zhen-Yi gu Meng-Xuan Yu Bo Zhao xian-Kun Hou Xing-Long Wu Faculty of Chemistry Northeast Normal UniversityChangchun 130024JilinChina MOE Key Laboratory for UV Light-Emitting Materials and Technology Northeast Normal UniversityChangchun 130024JilinChina

With the increasing popularity of new en ergy electric vehicles,the dema nd for lithium-ion batteries(LIBs)has been growing rapidly,which will produce a large number of spent ***,recycling of spe nt LIBs has become an urge nt task to be solved,otherwise it will inevitably lead to serious environmental ***,a unique recycling strategy is proposed to achieve the concurrent reuse of cathode and anode in the spent graphite/LiFePO_(4) *** with such recycling process,a unique cathode composed of recycled LFP/graphite(RLFPG)with cation/anion-co-storage ability is designed for new-type dual-ion battery(DIB).As a result,the recycle-derived DIB of Li/RLFPG is established with good electrochemical performance,such as an initial discharge capacity of 117.4 mA h g^(-1) at 25 mA g^(-1) and 78% capacity retention after 1000 cycles at 100 mA g^(-1).The working mechanism of Li/RLFPG DIB is also revealed via in situ X-ray diffraction and electrode kinetics *** work not only presents a farreaching significance for large-scale recycling of spent LIBs in the future,but also proposed a sustainable and econo mical method to design n ew-type sec on dary batteries as recycling of spe nt LIBs.

关键词： Dual-ion batteries LiFePO_(4) Graphite Spenr lithium-ion batteries Recycle