检索结果-南通市图书馆

Effects of gallium surfactant on AlN thin films by microwave plasma chemical vapor deposition

在线全文

学校读者我要写书评

暂无评论

Journal of Semiconductors 2024年第9期45卷 53-60页

作者： lu wang xulei Qin Li zhang Kun xu Feng Yang Shaoqian lu Yifei Li Bosen liu Guohao Yu Zhongming Zeng Baoshun zhang School of physics Changchun University of Science and TechnologyChangchun 130013China Nanofabrication Facility Suzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhou 215123China

In this work, AlN films were grown using gallium (Ga) as surfactant on 4° off-axis 4H-SiC substrates via microwave plasma chemical vapor deposition (MPCVD). We have found that AlN growth rate can be greatly improved due to the catalytic effect of trimethyl-gallium (TMGa), but AlN crystal structure and composition are not affected. When the proportion of TMGa in gas phase was low, crystal quality of AlN can be improved and three-dimensional growth mode of AlN was enhanced with the increase of Ga source. When the proportion of TMGa in gas phase was high, two-dimensional growth mode of AlN was presented, with the increase of Ga source results in the deterioration of AlN crystal quality. Finally, employing a two-step growth approach, involving the initial growth of Ga-free AlN nucleation layer followed by Ga-assisted AlN growth, high quality of AlN film with flat surface was obtained and the full width at half maximum (FWHM) values of 415 nm AlN (002) and (102) planes were 465 and 597 arcsec.

关键词： AlN thin film MPCVD gallium surfactant nucleation layer laser

New sustainable polymers with on-demand depolymerization property

在线全文

学校读者我要写书评

暂无评论

Science china Chemistry 2024年第9期67卷 2803-2841页

作者： Yangyang sun Zesheng An Yanshan Gao Rongrong Hu Ye liu Hua lu Xiao-Bing lu xuan Pang Anjun Qin Yong Shen Youhua Tao Yu-Zhong wang Junpeng wang Gang Wu Guang-Peng Wu Tie-Qi xu Xing-Hong zhang Yuetao zhang zhenbiao zhang Jian-Bo Zhu Miao Hong Zhibo Li State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai 200032China State Key Laboratory Base of Eco-Chemical Engineering College of Chemical EngineeringQingdao University of Science and TechnologyQingdao266042China State Key Laboratory of supramolecular Structure and Materials College of ChemistryJilin UniversityChangchun 130012China State Key Laboratory of luminescent Materials and Devices Guangdong Provincial Key Laboratory of Luminescence from Molecular AggregatesSouth China University of TechnologyGuangzhou 510640China State Key Laboratory of Fine Chemicals Frontiers Science Center for Smart MaterialsDalian University of TechnologyDalian 116024China Beijing National Laboratory for Molecular Sciences Center for Soft Matter Science and EngineeringKey Laboratory of Polymer Chemistry and Physics of Ministry of EducationCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China Key Laboratory of Polymer Ecomaterials Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China The Collaborative Innovation Center for Eco-Friendly and Fire-Safety Polymeric Materials(MoE) National Engineering Laboratory of Eco-Friendly Polymeric Materials(Sichuan)College of ChemistryState Key Laboratory of Polymer Materials EngineeringSichuan UniversityChengdu 610064China School of Polymer Science and Polymer Engineering the University of AkronAkronOH 44325USA MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and EngineeringZhejiang UniversityHangzhou 310027China State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials Jiangsu Key Laboratory of Advanced Functional Polymer Design and ApplicationSuzhou Key Laboratory of Macromolecular Design and Precision SynthesisCollege of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China

To combat the crisis of today's synthetic polymers arising from unsustainable production and disposal,it is essential for the synthetic polymer community to reshape the current polymer industry with sustainable *** an emerging class of sustainable polymers,the development of chemically depolymerizable polymers(CDPs),which can undergo closed-loop depolymerization/repolymerization cycles to reproduce virgin polymers without the loss of properties from recovered monomers,offers an ideal solution to preserve finite natural resources,provides a feasible solution to the end-of-life issue of polymer waste,and thereby establishes a circular materials ***,two grand key challenges have been encountered in the establishment of practically useful CDPs:how to balance polymerization and depolymerization ability and how to unify conflicted depolymerizability and physical ***,this critical review article presents our vision for summarizing feasible strategies to overcome the above two significant challenges and the design principles for constructing an ideal CDP by highlighting selected major progress made in this rapidly expanding field.

关键词： chemically depolymerizable polymers sustainable polymers depolymerization monomer recovery degradation plastics

Pressure-induced crystallite breaking in La_(0.7)Sr_(0.3)Mn_(0.9)Fe_(0.1)O_3 nanosolids

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 1998年第6期43卷 458-461页

作者： zheNG Fanlei 1, 2, suI Yu 1, 3, xu dapeng 1 and su wenhui 1, 4 1. department of physics, jilin university, changchun 130023, china 2. changchun Institute of physics, Chinese Academy of Sciences, changchun 130021, china 3. Institute of Metal R department of physics Jilin University Changchun Chinas changchun Institute of physics Chinese Academy of Sciences Changchun China Institute of Metal Research Chinese Academy of Sciences Shenyang China International Center for Materials physics Chinese Academy of Sceinces Shenyang China Center for Condensed Matter and Radiation physics CCAST (World Lab.) Beijing China

In the compacting process of the La 0.7Sr 0.3Mn 0.9Fe 0.1O 3 nanosolids under the pressure range of 0.0-4.5 GPa, the apparent pressure-induced crystallite breaking phenomenon in these nanosolids was observed. With increasing pressure up to 4.5 GPa, the average grain size decreases by 46% while the magnetization of nanosolids decrease by 40% and their coercive increases by 35%. This kind of breaking has a close relation to the existence of oxygen deficiency in La 0.7Sr 0.3Mn 0.9Fe 0.1O 3 nanoparticles. A simple and convenient method for preparing the bulk nanosolids with a large number of clean interfaces has been suggested.

关键词： nanosolid pressure-induced breaking high pressure.

Roadmap for rechargeable batteries:present and beyond

在线全文

学校读者我要写书评

暂无评论

Science china Chemistry 2024年第1期67卷 13-42页

作者： Sen Xin xu zhang Lin wang Haijun Yu Xin Chang Yu-Ming Zhao Qinghai Meng Pan xu Chen-Zi Zhao Jiahang Chen Huichao lu Xirui Kong Jiulin wang Kai Chen Gang Huang Xinbo zhang Yu su Yao Xiao Shu-Lei Chou Shilin zhang Zaiping Guo Aobing Du Guanglei Cui Gaojing Yang Qing Zhao liubing Dong Dong Zhou Feiyu Kang Hu Hong Chunyi Zhi Zhizhang Yuan Xianfeng Li Yifei Mo Yizhou Zhu Dongfang Yu Xincheng Lei Jianxiong Zhao Jiayi wang Dong su Yu-Guo Guo Qiang zhang Jun Chen Li-Jun Wan CAS Key Laboratory of Molecular Nanostructure and Nanotechnology CAS Research/Education Center for Excellence in Molecular SciencesBeijing National Laboratory for Molecular Sciences(BNLMS)Institute of ChemistryChinese Academy of Sciences(CAS)Beijing 100190China university of Chinese Academy of Sciences.Beijing 100049 China Institute of Advanced Battery Materials and Devices Faculty of Materials and ManufacturingBeijing University of TechnologyBeijing 100124China Key Laboratory of Advanced Functional Materials Ministry of EducationBeijing University of TechnologyBeijing 100124China Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical EngineeringTsinghua UniversityBeijing 100084China State Key Laboratory of Chemistry and Utilization of Carbon-Based Energy Resources College of ChemistryXinjiang UniversityUrumqi 830046China department of Chemical Engineering Shanghai Jiao Tong UniversityShanghai 200240China State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChangchun 130022China Institute for Carbon Neutralization College of Chemistry and Materials EngineeringWenzhou UniversityWenzhou 325035China School of Chemical Engineering and Advanced Materials The University of AdelaideAdelaide 5000Australia Qingdao Industrial Energy Storage Research Institute Qingdao Institute of Bioenergy and Bioprocess TechnologyChinese Academy of SciencesQingdao 266101China Frontiers Science Center for New Organic Matter Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education)College of ChemistryNankai UniversityTianjin 300071China College of Chemistry and Materials Science Jinan UniversityGuangzhou 511443China Tsinghua Shenzhen International Graduate School Tsinghua UniversityShenzhen 518055China department of Materials Science and Engineering City University of Hong KongHong Kong 999077China Division of Energy Storage Dalian National Laboratory for Clean Energy(DNL)Dalian Institute of Chem

Rechargeable batteries currently hold the largest share of the electrochemical energy storage market,and they play a major role in the sustainable energy transition and industrial decarbonization to respond to global climate *** to the increased popularity of consumer electronics and electric vehicles,lithium-ion batteries have quickly become the most successful rechargeable batteries in the past three decades,yet growing demands in diversified application scenarios call for new types of rechargeable *** efforts are made to developing the next-generation post-Li-ion rechargeable batteries,which include,but are not limited to solid-state batteries,lithium–sulfur batteries,sodium-/potassium-ion batteries,organic batteries,magnesium-/zinc-ion batteries,aqueous batteries and flow *** the great achievements,challenges persist in precise understandings about the electrochemical reaction and charge transfer process,and optimal design of key materials and interfaces in a *** roadmap tends to provide an overview about the current research progress,key challenges and future prospects of various types of rechargeable *** computational methods for materials development,and characterization techniques will also be discussed as they play an important role in battery research.

关键词： energy storage rechargeable batteries battery materials electrochemistry

Associations of sleeping patterns and isotemporal substitution of other behavior with the prevalence of CKD in Chinese adults

在线全文

学校读者我要写书评

暂无评论

Frontiers of Medicine 2024年第2期18卷 303-314页

作者： Yi Ding Xiaoli xu Zhuojun Xin Qiuyu Cao Jiaojiao Huang Xianglin Wu Yanan Huo Qin Wan Yingfen Qin Ruying Hu Lixin Shi Qing su xuefeng Yu Li Yan Guijun Qin xulei Tang Gang Chen Min xu Tiange wang Zhiyun Zhao zhengnan Gao Guixia wang Feixia Shen Zuojie luo Li Chen Qiang Li zhen Ye Yinfei zhang Chao liu Youmin wang Tao Yang Huacong Deng lulu Chen Tianshu Zeng Jiajun Zhao Yiming Mu Shengli Wu Yuhong Chen Jieli lu Weiqing wang Guang Ning Yu xu Yufang Bi Mian Li department of Endocrine and Metabolic Diseases Shanghai Institute of Endocrine and Metabolic DiseasesRuijin HospitalShanghai Jiao Tong University School of MedicineShanghai200025China Shanghai National Clinical Research Center for Metabolic Diseases Key Laboratory for Endocrine and Metabolic Diseases of the National Health Commission of ChinaShanghai Key Laboratory for Endocrine TumorState Key Laboratory of Medical GenomicsRuijin HospitalShanghai Jiao Tong University School of MedicineShanghai200025China Jiangxi Provincial People’s Hospital Affiliated to Nanchang UniversityNanchang330000China department of Endocrinology The Affiliated Hospital of Southwest Medical UniversityLuzhou646000China department of Endocrinology The First Affiliated Hospital of Guangxi Medical UniversityNanning530000China zhejiang Provincial Center for Disease Control and Prevention Hangzhou310000China department of Endocrinology Affiliated Hospital of Guiyang Medical UniversityGuiyang550000China Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of MedicineShanghai200000China Tongji Hospital Tongji Medical CollegeHuazhong University of Science and TechnologyWuhan430000China sun Yat-sen Memorial Hospital Sun Yat-sen UniversityGuangzhou510000China department of Endocrinology The First Affiliated Hospital of Zhengzhou UniversityZhengzhou450000China department of Endocrinology The First Hospital of Lanzhou UniversityLanzhou730000China Fujian Provincial Hospital Fujian Medical UniversityFuzhou350000China Dalian Municipal Central Hospital Affiliated of Dalian Medical UniversityDalian116000China department of Endocrinology The First Hospital of Jilin UniversityChangchun130000China department of Endocrinology The First Affiliated Hospital of Wenzhou Medical UniversityWenzhou325000China Qilu Hospital of Shandong university Jinan250000China department of Endocrinology The Second Affiliated Hospital of Harbin Medical UniversityHarbin150000China department of Endocrinology Cen

Studies have found a U-shaped relationship between sleep duration and chronic kidney disease(CKD)risk,but limited research evaluated the association of reallocating excessive sleep to other behavior with *** included 104538 participants from the nationwide cohort of the Risk Evaluation of Cancers in Chinese Diabetic Individuals:A Longitudinal Study,with self-reported time of daily-life *** isotemporal substitution models,we found that substituting 1 h of sleeping with sitting,walking,or moderate-to-vigorous physical activity was associated with a lower CKD ***-time physical activity displacement was associated with a greater prevalence reduction than occupational physical activity in working *** stratified analysis,a lower CKD prevalence related to substitution toward physical activity was found in long *** pronounced correlations were observed in long sleepers with diabetes than in those with prediabetes,and they benefited from other behavior substitutions toward a more active *** U-shaped association between sleep duration and CKD prevalence implied the potential effects of insufficient and excessive sleep on the kidneys,in which the pernicious link with oversleep could be reversed by time reallocation to physical *** divergence in the predicted effect on CKD following time reallocation to behavior of different domains and intensities and in subpopulations with diverse metabolic statuses underlined the importance of optimizing sleeping patterns and adjusting integral behavioral composition.

关键词： sleep physical activity chronic kidney disease isotemporal substitution behavioral pattern

From lab to market:a review of commercialization and advances for binders in lithium-,zinc-,sodium-ion batteries

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research Energy 2024年第1期3卷 152-171页

作者： Chang su xuan Gao Kejiang liu Yuhang Dai Haobo Dong Yiyang liu Jiayan Zhu Qiuxia zhang Hongzhen He Guanjie He department of Management Technologyand EconomicsETH ZürichZürich 8092Switzerland Christopher Ingold Laboratory Department of ChemistryUniversity College LondonLondon WC1H0AJUK Electrochemical Innovation Lab Department of Chemical EngineeringUniversity College LondonLondon WC1E7JEUK department of physics Hong Kong Baptist UniversityHong Kong 999077China State Key Lab of superhard Materials College of PhysicsJilin UniversityChangchun 130012China

The paper discusses the progress and commercialization of binders for energy storage applications,such as *** explains the role of binders in holding together active materials and current collectors,and highlights the challenges associated with conventional organic solvents in *** potential of aqueous binders is introduced as a cost-effective and environmentally friendly *** advantages and limitations of different types of binders are discussed,and the importance of binder selection for optimal battery performance is *** current state of commercialization of binders is reviewed,and the need for collaboration between researchers,manufacturers,and policymakers to develop and promote environmentally friendly and cost-effective binders is *** paper concludes by outlining future directions for research and development to further improve the performance and commercialization of binders,while addressing limitations such as lack of standardization,high cost,and long-term stability and reliability.

关键词： battery commercialization binder energy storage

Atomic Dispersed Hetero‑Pairs for Enhanced Electrocatalytic CO_(2)Reduction

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano-Micro Letters 2024年第1期16卷 55-67页

作者： Zhaoyong Jin Meiqi Yang Yilong Dong Xingcheng Ma Ying wang Jiandong Wu Jinchang Fan Dewen wang Rongshen Xi Xiao Zhao Tianyi xu Jingxiang Zhao Lei zhang David J.Singh Weitao zheng Xiaoqiang Cui State Key Laboratory of Automotive Simulation and Control School of Materials Science and EngineeringKey Laboratory of Automobile Materials of MOEElectron Microscopy CenterJilin UniversityChangchun 130012People’s Republic of China Key Laboratory of Photonic and Electronic Bandgap Materials Ministry of Educationand College of Chemistry and Chemical EngineeringHarbin Normal UniversityHarbin 150025People’s Republic of China College of Chemistry Jilin UniversityChangchun 130012People’s Republic of China department of physics and Astronomy and department of Chemistry University of MissouriColumbiaMO 65211USA

Electrochemical carbon dioxide reduction reaction(CO_(2)RR)involves a variety of intermediates with highly correlated reaction and ad-desorption energies,hindering optimization of the catalytic *** example,increasing the binding of the*COOH to the active site will generally increase the*CO desorption *** this relationship may be expected to dramatically improve the intrinsic activity of CO_(2)RR,but remains an unsolved ***,we addressed this conundrum by constructing a unique atomic dispersed hetero-pair consisting of Mo-Fe di-atoms anchored on N-doped carbon *** system shows an unprecedented CO_(2)RR intrinsic activity with TOF of 3336 h−1,high selectivity toward CO production,Faradaic efficiency of 95.96%at−0.60 V and excellent *** calculations show that the Mo-Fe diatomic sites increased the*COOH intermediate adsorption energy by bridging adsorption of*COOH *** the same time,d-d orbital coupling in the Mo-Fe di-atom results in electron delocalization and facilitates desorption of*CO ***,the undesirable correlation between these steps is *** work provides a promising approach,specifically the use of di-atoms,for breaking unfavorable relationships based on understanding of the catalytic mechanisms at the atomic scale.

关键词： CO_(2)reduction reaction Atomic dispersed catalyst Hetero-diatomic pair Ad-desorption energy Linear scaling relation

Tb￣(3+) as Fluorescent Probe in the Study of the Interaction of Other Lanthanide Ions with Trichosanthin

在线全文

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 1995年第4期11卷 279-283页

作者： HAO Qiang LI Wen-lian zhang Yan YU Gui YANGHong ZHAO xu YAO Qi-Zhi and LI Qing-shan(department of Molecular Biofogy and National Laboratory of enzyme engineering,Jiln university,changchun, 130023)(changchun Institute of physics, Academia Sinica, Cha jilin UNIV DEPT MOLEC BIOLCHANGCHUN 130023PEOPLES R CHINA jilin UNIV NATL LAB ENZYME ENGNCHANGCHUN 130023PEOPLES R CHINA ACAD SINICA CHANGCHUN INST PHYSCHANGCHUN 130023PEOPLES R CHINA ACAD SINICA GRAD SCHBEIJING 100039PEOPLES R CHINA

he interaction of lanthanide (Ln￣(3+))ions with trchosanthin(TCS)was investi-gated using Tb￣(3+) as fluorescent probe. The metal-binding sites of the protein were probed by means of adding the Tb￣(3+) into the protein solutions. If other Ln￣(3+) ions exist in the Tb￣(3+) protein complex system, they would compete against Tb￣(3+) in the binding sites of the protein, and so the fluorescence intensity of Tb￣(3+) decreased,which is called quenching *** quencliing effect is related to the ionic radii of the Ln￣(3+) ions and energy transfer from Tb￣(3+) protein to Ln￣(3+) ions. Based on the ex- perimental results,a schematic of the energy transfer from protein-Tb￣(3+) complex to protein-Ln￣(3+) complex is suggested.

关键词： Trichosanthin Energy transfer Protein-Ln￣(3+) complex

Nanodiamond-Assisted High Performance Lithium and Sodium Ions Co-Storage

在线全文

学校读者我要写书评

暂无评论

Energy & Environmental Materials 2024年第6期7卷 94-105页

作者： Xiaochen sun xuan Gao Chang su Wei Cheng Nan Gao Xin zhang Mengmeng Gong Haobo Dong Yuhang Dai Guanjie He Hongdong Li State Key Lab of superhard Materials College of PhysicsJilin UniversityChangchun130012 China Christopher Ingold Laboratory Department of ChemistryUniversity College London20 Gordon StreetLondonWC1H 0AJ UK Nuffield College University of OxfordNew RoadOxford OX11NFUK

While lithium resources are scarce for high energy-dense lithium-ion batteries(LIBs),sodium-ion batteries(SIBs),serving as an alternative,inherently suffer from low capacity and the high-cost use of non-graphite *** Li-and Na-ions within a single battery system is expected to mitigate the shortcomings of both systems while leveraging their respective *** this study,we developed and assembled a nanodiamonds(NDs)-assisted co-Li/Na-ion battery(ND–LSIB).This innovative battery system comprised a commercial graphite anode,an ND-modified polypropylene(DPP)separator,a hybrid lithium/sodium-based electrolyte,and a *** is theoretically and experimentally demonstrated that the ND/Li co-insertion can serve as an ion-drill opening graphite layers and reconstructing graphite anodes into few-layered graphene with expanding interlayer space,achieving highly efficient Li/Na storage and the theoretical maximum of LiC_(6)for Li storage in *** addition,ND is helpful for creating a LiF-/NaF-rich hybrid solid electrolyte interface with improved ionic mobility,mechanical strength,and ***,ND–LSIBs have higher specific capacities~1.4 times the theoretical value of LIBs and show long-term cycling *** study proposes and realizes the concept of Li/Na co-storage in one ion battery with compatible high-performance,cost-effectiveness,and industrial prospects.

关键词： battery lithium electrolyte