检索结果-内蒙古大学图书馆

Varying the Stiffness and Diffusivity of Rod-Shaped Microgels Independently through Their Molecular Building Blocks

Angewandte Chemie 2023年第44期135卷

作者： Yonca Kittel Luis P. B. Guerzoni Carolina Itzin Dirk Rommel Matthias Mork Céline Bastard Bernhard Häßel Abdolrahman Omidinia-Anarkoli Silvia P. Centeno Tamás Haraszti Kyoohyun Kim Jochen Guck Alexander J. C. Kuehne Laura De Laporte DWI-Leibniz Institute for Interactive Materials e. V. Forckenbeckstraße 50 52074 Aachen Germany Institute of Technical and Macromolecular Chemistry RWTH Aachen University Worringerweg 1–2 52074 Aachen Germany Institute of Organic and Macromolecular Chemistry Ulm University Albert-Einstein Allee 11 89081 Ulm Germany Contribution: Conceptualization (equal) Data curation (lead) Formal analysis (lead) Investigation (lead) Project administration (lead) Visualization (lead) Writing - original draft (lead) Contribution: Conceptualization (equal) Investigation (supporting) Supervision (supporting) Writing - review & editing (supporting) Contribution: Investigation (supporting) Validation (supporting) Visualization (supporting) Writing - review & editing (equal) Contribution: Conceptualization (supporting) Investigation (supporting) Validation (supporting) Writing - review & editing (equal) Contribution: Conceptualization (supporting) Formal analysis (supporting) Investigation (supporting) Visualization (supporting) Writing - review & editing (equal) Center for Biohybrid Medical Systems (CBMS) Advanced Materials for Biomedicine (AMB) Institute of Applied Medical Engineering (AME) Forckenbeckstraße 55 52074 Aachen Germany Contribution: Conceptualization (supporting) Validation (supporting) Visualization (supporting) Writing - original draft (supporting) Writing - review & editing (equal) Contribution: Formal analysis (equal) Software (lead) Validation (supporting) Visualization (supporting) Writing - original draft (supporting) Writing - review & editing (equal) Max Planck Institute for the Science of Light and Max-Planck-Zentrum für Physik und Medizin Staudtstraße 2 91058 Erlangen Germany Contribution: Conceptualization (supporting) Investigation (supporting) Software (supporting) Validation (supporting) Visualization (supporting) Writing - original draft (supporting) Writing - review & editing (equal) Contribution: Conceptualization (supporting) Writing - review

Microgels are water-swollen, crosslinked polymers that are widely used as colloidal building blocks in scaffold materials for tissue engineering and regenerative medicine. Microgels can be controlled in their stiffness, degree of swelling, and mesh size depending on their polymer architecture, crosslink density, and fabrication method—all of which influence their function and interaction with the environment. Currently, there is a lack of understanding of how the polymer composition influences the internal structure of soft microgels and how this morphology affects specific biomedical applications. In this report, we systematically vary the architecture and molar mass of polyethylene glycol-acrylate (PEG-Ac) precursors, as well as their concentration and combination, to gain insight in the different parameters that affect the internal structure of rod-shaped microgels. We characterize the mechanical properties and diffusivity, as well as the conversion of acrylate groups during photopolymerization, in both bulk hydrogels and microgels produced from the PEG-Ac precursors. Furthermore, we investigate cell-microgel interaction, and we observe improved cell spreading on microgels with more accessible RGD peptide and with a stiffness in a range of 20 kPa to 50 kPa lead to better cell growth.

关键词： Diffusion Internal Structure Mechanical Properties Microfluidics PEG Microgels

来源：评论

学校读者我要写书评

暂无评论

Modulating Metal-Nitrogen Coupling in Anti-Perovskite Nitride via Cation Doping for Efficient Reduction of Nitrate to Ammonia

引用

Angewandte Chemie 2023年第38期135卷

作者： Zhiheng Gong Xuepeng Xiang Wenye Zhong Chenghao Jia Peiyan Chen Prof. Nian Zhang Prof. Shijun Zhao Prof. Weizhen Liu Prof. Yan Chen Prof. Zhang Lin Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling School of Environment and Energy South China University of Technology Guangzhou 510006 P. R. China Contribution: Conceptualization (equal) Data curation (lead) Investigation (lead) Methodology (lead) Visualization (lead) Writing - original draft (lead) Writing - review & editing (equal) Department of Mechanical Engineering City University of Hong Kong Hong Kong 999077 P. R. China Contribution: Data curation (equal) Formal analysis (equal) Software (lead) Visualization (equal) Writing - review & editing (equal) Contribution: Formal analysis (supporting) Investigation (supporting) Shanghai Synchrotron Radiation Facility Zhangjiang Laboratory Shanghai Advanced Research Institute Chinese Academy of Sciences Shanghai 201204 P. R. China Contribution: Resources (equal) Supervision (equal) Contribution: Resources (equal) Software (equal) Contribution: Supervision (equal) Validation (equal) Visualization (equal) Writing - review & editing (supporting) Contribution: Conceptualization (lead) Funding acquisition (lead) Resources (lead) Supervision (lead) Validation (lead) Writing - review & editing (lead) Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution School of Metallurgy and Environment Central South University Changsha 410083 P. R. China Contribution: Conceptualization (equal) Resources (equal) Supervision (equal)

来源：评论

学校读者我要写书评

暂无评论

Regulating Relative Nitrogen Locations of Diazine Functionalized Covalent Organic Frameworks for Overall H2O2Photosynthesis

引用

Angewandte Chemie 2023年第41期135卷

作者： Dr. Qiaobo Liao Qiannan Sun Haocheng Xu Yandong Wang Yang Xu Ziyu Li Jinwu Hu Prof. Ding Wang Prof. Huijun Li Prof. Kai Xi School of Materials and Chemistry University of Shanghai for Science and Technology Shanghai 200093 P. R. China School of Chemistry and Chemical Engineering Nanjing University Nanjing Jiangsu 210023 P. R. China Contribution: Data curation (lead) Formal analysis (supporting) Funding acquisition (supporting) Investigation (equal) Software (lead) Visualization (equal) Writing - original draft (lead) Writing - review & editing (equal) Contribution: Data curation (supporting) Formal analysis (equal) Investigation (equal) Writing - original draft (supporting) Writing - review & editing (supporting) Contribution: Data curation (equal) Formal analysis (equal) Investigation (equal) Writing - original draft (supporting) Writing - review & editing (supporting) Contribution: Investigation (supporting) Writing - review & editing (supporting) Contribution: Conceptualization (equal) Funding acquisition (equal) Project administration (lead) Supervision (supporting) Writing - original draft (supporting) Writing - review & editing (equal) Contribution: Conceptualization (equal) Funding acquisition (supporting) Investigation (supporting) Writing - original draft (supporting) Writing - review & editing (supporting) Contribution: Conceptualization (lead) Formal analysis (supporting) Funding acquisition (equal) Project administration (supporting) Supervision (lead) Writing - original draft (supporting) Writing - review & editing (equal)

Nitrogen-heterocycle-based covalent organic frameworks (COFs) are considered promising candidates for the overall photosynthesis of hydrogen peroxide (H 2 O 2 ). However, the effects of the relative nitrogen locations remain obscured and photocatalytic performances of COFs need to be further improved. Herein, a collection of COFs functionalized by various diazines including pyridazine, pyrimidine, and pyrazine have been judiciously designed and synthesized for photogeneration of H 2 O 2 without sacrificial agents. Compared with pyrimidine and pyrazine, pyridazine embedded in TpDz tends to stabilize endoperoxide intermediate species, leading toward the more efficient direct 2e - oxygen reduction reaction (ORR) pathway. Benefiting from the effective electron-hole separation, low charge transfer resistance, and high-efficiency ORR pathway, an excellent production rate of 7327 μmol g −1 h −1 and a solar-to-chemical conversion (SCC) value of 0.62 % has been achieved by TpDz, which ranks one of the best COF-based photocatalysts. This work might shed fresh light on the rational design of functional COFs targeting photocatalysts in H 2 O 2 production.

关键词： Covalent Organic Frameworks Diazine Environmental Chemistry Hydrogen Peroxide Photocatalysis

来源：评论

学校读者我要写书评

暂无评论

Modulating the Reaction Configuration by Breaking the Structural Symmetry of Active Sites for Efficient Photocatalytic Reduction of Low-concentration CO2

引用

Angewandte Chemie 2023年第42期135卷

作者： Wenyuan Lyu Dr. Yang Liu Jingyi Zhou Datong Chen Dr. Xin Zhao Dr. Ruiqi Fang Dr. Fengliang Wang Prof. Yingwei Li School of Chemistry and Chemical Engineering South China University of Technology Guangzhou 510640 China Contribution: Data curation (lead) Formal analysis (lead) Investigation (lead) Methodology (lead) Writing - original draft (equal) Writing - review & editing (equal) Guangdong Provincial Key Laboratory of Petrochemical Pollution Process and Control School of Environmental Science and Engineering Guangdong University of Petrochemical Technology Maoming Guangdong 525000 China Contribution: Methodology (equal) Software (lead) Contribution: Formal analysis (equal) Investigation (equal) Contribution: Formal analysis (supporting) Investigation (equal) Contribution: Formal analysis (supporting) Contribution: Formal analysis (equal) Funding acquisition (equal) Investigation (equal) Methodology (equal) Supervision (lead) Visualization (equal) Writing - original draft (equal) Writing - review & editing (lead) State Key Laboratory of Pulp and Paper Engineering South China University of Technology Guangzhou 510640 China Contribution: Conceptualization (equal) Funding acquisition (lead) Project administration (lead) Resources (lead) Supervision (equal) Writing - review & editing (equal)

Photocatalytic conversion of low-concentration CO 2 is considered as a promising way to simultaneously mitigate the environmental and energy issues. However, the weak CO 2 adsorption and tough CO 2 activation process seriously compromise the CO production, due to the chemical inertness of CO 2 molecule and the formed fragile metal-C/O bond. Herein, we designed and fabricated oxygen vacancy contained Co 3 O 4 hollow nanoparticles on ordered macroporous N-doped carbon framework (Vo−HCo 3 O 4 /OMNC) towards photoreduction of low-concentration CO 2 . In situ spectra and ab initio molecular dynamics simulations reveal that the constructed oxygen vacancy is able to break the local structural symmetry of Co−O−Co sites. The formation of asymmetric active site switches the CO 2 configuration from a single-site linear model to a multiple-sites bending one with a highly stable configuration, enhancing the binding and structural polarization of CO 2 molecules. As a result, Vo−HCo 3 O 4 /OMNC shows unprecedent activity in the photocatalytic conversion of low-concentration CO 2 (10 % CO 2 /Ar) under laboratory light source or even natural sunlight, affording a syngas yield of 337.8 or 95.2 mmol g −1 h −1 , respectively, with an apparent quantum yield up to 4.2 %.

关键词： CO2 Reduction Metal–Organic Frameworks Oxygen Vacancy Photocatalysis Synthesis Gas

来源：评论

学校读者我要写书评

暂无评论

The fine-scale movement pattern of Amur tiger (Panthera tigris altaica) responds to winter habitat permeability小尺度下东北虎 (Panthera Tigris altaica) 的运动模式对冬季栖息地渗透性的响应

Wildlife Letters

引用

Wildlife Letters 2023年第3期1卷

作者： Ying Wang Wannian Cheng Yanhui Guan Jinzhe Qi Nathan J. Roberts Dusu Wen Zhigang Cheng Feng Shan Yan Zhao Jiayin Gu Feline Research Center of National Forestry and Grassland Administration College of Wildlife and Protected Area Northeast Forestry University Harbin China Northeast Asia Biodiversity Research Center Northeast Forestry University Harbin China Contribution: Conceptualization (equal) Data curation (equal) Formal analysis (lead) Investigation (equal) Visualization (lead) Writing - original draft (lead) Writing - review & editing (equal) Contribution: Data curation (equal) Investigation (equal) Heilongjiang Xiaobeihu National Nature Reserve Administration Ningan China Contribution: Investigation (equal) Contribution: Writing - review & editing (equal) Northeast Tiger and Leopard National Park Administration Hunchun Bureau Hunchun China Contribution: Conceptualization (equal) Data curation (equal) Investigation (equal) Supervision (lead) Writing - review & editing (equal)

The number of Amur tigers living in protected regions is increasing, and China has achieved significant progress in this regard, especially at the Sino-Russia border region around Hunchun where most of the Amur tigers are found in China. However, there is a need to increase the dispersal of Amur tigers further from the border as the region is not large enough to support the sustainable survival of the population. In the winter of 2012–2015 and January 2022, we tracked 38 Amur tiger snow traces and performed line transect and camera trap surveys in Hunchun to assess Amur tiger movements in response to the landscape and its permeability at fine scales. Our results showed that towns, shrubs, and forest roads are the main factors influencing Amur tiger movements. Furthermore, tiger paths were characterized by lower tortuosity in preferred habitats. This provides information for small-scale habitat modification to increase landscape permeability and facilitate dispersal. 生活在保护地内东北虎的数量正在增加，中国在东北虎保护方面已经取得了显著进展，特别是在大部分东北虎分布的中俄边境地区的珲春区域。然而，由于该地区的空间不足以支撑一个东北虎种群的持续生存，急需加快东北虎从边境地区向内陆的进一步扩散。2012–2015年冬季和2022年1月的雪被覆盖期，在珲春追踪了38条东北虎的雪地足迹链，并进行了样线和自动相机调查，以评估小尺度范围内东北虎运动对景观及其景观渗透性的响应。结果表明，乡镇、灌木植被和林间道路是影响东北虎运动的主要因素。此外，东北虎在偏爱的栖息地内路径弯曲度较低。本研究为小规模栖息地的改造增加景观渗透性、促进东北虎扩散提供了参考信息。 Maintain forest roads and limit human use to increase landscape permeability for large carnivores. Use vegetation for land zoning to separate human activity from tiger habitat. This research provides new insights for landscape permeability assessment of wildlife in the future.

关键词： landscape permeability movement patterns Panthera tigris altaica path tortuosity 景观渗透性运动模式东北虎路径弯曲度

来源：评论

学校读者我要写书评

暂无评论

Cations Determine the Mechanism and Selectivity of Alkaline Oxygen Reduction Reaction on Pt(111)**

引用

Angewandte Chemie 2023年第51期135卷

作者： Dr. Tomoaki Kumeda Dr. Laura Laverdure Prof. Dr. Karoliina Honkala Dr. Marko M. Melander Prof. Dr. Ken Sakaushi Research Center for Energy and Environmental Materials National Institute for Materials Science 1-1 Namiki Tsukuba Ibaraki 305-0044 Japan Contribution: Data curation (lead) Investigation (lead) Validation (lead) Visualization (lead) Writing - original draft (equal) Department of Chemistry Nanoscience Center University of Jyväskylä P.O. Box 35 40014 Jyväskylä Finland Contribution: Formal analysis (supporting) Investigation (supporting) Validation (supporting) Writing - review & editing (supporting) Contribution: Funding acquisition (lead) Investigation (supporting) Supervision (supporting) Validation (supporting) Writing - review & editing (supporting) Contribution: Conceptualization (supporting) Data curation (equal) Formal analysis (equal) Funding acquisition (equal) Investigation (equal) Project administration (supporting) Resources (equal) Software (lead) Supervision (equal) Validation (lead) Writing - original draft (equal) Contribution: Conceptualization (lead) Data curation (equal) Formal analysis (equal) Funding acquisition (lead) Investigation (equal) Project administration (lead) Resources (lead) Supervision (lead) Validation (lead) Writing - original draft (equal) Writing - review & editing (lead)

The proton-coupled electron transfer (PCET) mechanism of the oxygen reduction reaction (ORR) is a long-standing enigma in electrocatalysis. Despite decades of research, the factors determining the microscopic mechanism of ORR-PCET as a function of pH, electrolyte, and electrode potential remain unresolved, even on the prototypical Pt(111) surface. Herein, we integrate advanced experiments, simulations, and theory to uncover the mechanism of the cation effects on alkaline ORR on well-defined Pt(111). We unveil a dual-cation effect where cations simultaneously determine i) the active electrode surface by controlling the formation of Pt−O and Pt−OH overlayers and ii) the competition between inner- and outer-sphere PCET steps. The cation-dependent transition from Pt−O to Pt−OH determines the ORR mechanism, activity, and selectivity. These findings provide direct evidence that the electrolyte affects the ORR mechanism and performance, with important consequences for the practical design of electrochemical systems and computational catalyst screening studies. Our work highlights the importance of complementary insight from experiments and simulations to understand how different components of the electrochemical interface contribute to electrocatalytic processes.

关键词： Constrained DFT Electrocatalysis Energy Conversion Kinetic Isotope Effects Marcus Theory

来源：评论

学校读者我要写书评

暂无评论

Spatiotemporally Targeted Polypeptide Nanoantidotes Improve Chemotherapy Tolerance of Cisplatin

引用

Angewandte Chemie 2022年第47期134卷

作者： Dr. Jiazhen Yang Dr. Tianqi Su Dr. Haoyang Zou Prof. Guanqing Yang Prof. Jianxun Ding Prof. Xuesi Chen Key Laboratory of Polymer Ecomaterials Changchun Institute of Applied Chemistry Chinese Academy of Sciences 5625 Renmin Street Changchun 130022 P. R. China School of Applied Chemistry and Engineering University of Science and Technology of China 96 Jinzhai Road Hefei 230026 P. R. China Contribution: Conceptualization (equal) Formal analysis (lead) Investigation (lead) Methodology (lead) Resources (equal) Validation (equal) Visualization (equal) Writing - original draft (lead) Department of General Surgery The Second Hospital of Jilin University 218 Ziqiang Street Changchun 130041 P. R. China Contribution: Data curation (equal) Formal analysis (equal) Investigation (equal) Methodology (equal) Resources (equal) Software (equal) Validation (equal) Contribution: Data curation (lead) Formal analysis (equal) Funding acquisition (supporting) Investigation (supporting) Validation (equal) Visualization (equal) Writing - review & editing (equal) Contribution: Data curation (lead) Funding acquisition (supporting) Writing - review & editing (supporting) Contribution: Conceptualization (lead) Data curation (equal) Formal analysis (supporting) Funding acquisition (lead) Investigation (supporting) Project administration (lead) Supervision (lead) Writing - review & editing (lead) Contribution: Conceptualization (equal) Funding acquisition (lead) Project administration (lead) Supervision (lead) Writing - review & editing (lead)

The toxicity of drugs causes various adverse effects in patients. While antidotes that neutralize drug toxicity help reduce systemic damage during clinical therapy, these antidotes are generally accompanied by the loss of drug efficacy. Herein, the spatiotemporally targeted polycystine-based nanoantidotes were designed as a neutralizer of cisplatin (CDDP) to decrease its toxicity without affecting its anticancer efficacy. The nanoantidotes administered before CDDP selectively accumulated in the liver and kidney and then firmly bound to CDDP through the highly stable Pt−S bond during subsequent chemotherapy. This two-step administration strategy reduced the level of Pt in normal organs, shortened the half-life of CDDP in plasma, and increased the tolerance to CDDP. More importantly, the nanoantidotes maintained the anticancer efficacy of CDDP after reducing systemic toxicity, indicating its great potential in expanding the clinical application of CDDP.

关键词： polypeptides spatiotemporal targeting nanoantidotes drug tolerance chemotherapy

来源：评论

学校读者我要写书评

暂无评论

Uncovering the heterogeneity and cell fate decisions of endothelial cells after myocardial infarction by single-cell sequencing

Medicine Advances

引用

Medicine Advances 2023年第3期1卷

作者： Xinyang Long Boteng Yan Zengnan Mo School of Public Health Guangxi Medical University Nanning China Center for Genomic and Personalized Medicine Guangxi Key Laboratory for Genomic and Personalized Medicine Guangxi Collaborative Innovation Center for Genomic and Personalized Medicine Guangxi Medical University Nanning China Contribution: Data curation (lead) Formal analysis (lead) Investigation (lead) Resources (lead) Software (lead) Writing - original draft (lead) Department of Urology Institute of Urology and Nephrology The First Affiliated Hospital of Guangxi Medical University Nanning China Contribution: Data curation (supporting) Investigation (supporting) Resources (supporting) Visualization (supporting) Contribution: Conceptualization (lead) Project administration (lead) Supervision (lead)

Background The plasticity of endothelial cells (ECs) is crucial for tissue response to injury. Myocardial infarction can profoundly affect EC function, leading to a shift toward mesenchymal differentiation. Methods We utilized human single-nucleus RNA sequencing data to investigate the dynamic changes and cellular interactions between normal and post-infarction ECs. Results We identified two distinct subpopulations of ECs: A transient subpopulation characterized by short-term mesenchymal gene expression and a long-term subpopulation characterized by myocardial gene expression. Trajectory analysis revealed the differentiation pathways and potential roles over time and space. Furthermore, we uncovered the proliferation, differentiation, hypoxic, and inflammatory responses of ECs to injury. Conclusions Our study provides a comprehensive and detailed characterization of endothelial cell states, highlighting the role of activated endothelial cell subpopulations in promoting inflammation and tissue repair after infarction.

关键词： endothelial cells endothelial-to-mesenchymal transition myocardial infarction single-nucleus sequencing

来源：评论

学校读者我要写书评

暂无评论

Exploring Uncertainty in Image Segmentation Ensembles

Exploring Uncertainty in Image Segmentation Ensembles

引用

20th Eurographics/IEEE VGTC Conference on visualization, EuroVis 2018

作者： Fröhler, B. Möller, T. Weissenböck, J. Hege, H.-C. Kastner, J. Heinzl, C. Research Group Computed Tomography University of Applied Sciences Upper Austria Austria Visualization and Data Analysis Research Group Faculty of Computer Science University of Vienna Austria Visual Data Analysis Department Zuse Institute Berlin Germany

ISBN: (纸本)9783038680659

Finding the most accurate image segmentation involves analyzing results from different algorithms or parameterizations. In this work, we identify different types of uncertainty in this analysis that are represented by the results of probabilistic algorithms, by the local variability in the segmentation, and by the variability across the segmentation ensemble. We propose visualization techniques for the analysis of such types of uncertainties in segmentation ensembles. For a global analysis we provide overview visualizations in the image domain as well as in the label space. Our probability probing and scatter plot based techniques facilitate a local analysis. We evaluate our techniques using a case study on industrial computed tomography data. © 2018 The Author(s)

关键词：

来源：评论

学校读者我要写书评

暂无评论

High-Performance Thermoelectric α-Ag9Ga1−xTe6Compounds with Ultralow Lattice Thermal Conductivity Originating from Ag9Te2Motifs

引用

Angewandte Chemie 2022年第36期134卷

作者： Yingfei Tang Yimeng Yu Na Zhao Keke Liu Haijie Chen Constantinos C. Stoumpos Yixuan Shi Shuo Chen Lingxiao Yu Jinsong Wu Qingjie Zhang Xianli Su Xinfeng Tang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China International School of Materials Science and Engineering Wuhan University of Technology Wuhan 430070 China Contribution: Conceptualization (equal) Data curation (lead) Formal analysis (lead) Investigation (equal) Methodology (equal) Visualization (equal) Writing - original draft (lead) Nanostructure Research Center Wuhan University of Technology Wuhan 430070 China Contribution: Data curation (equal) Software (equal) Visualization (supporting) Contribution: Investigation (equal) Methodology (equal) Contribution: Investigation (equal) Methodology (equal) Visualization (equal) State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Institute of Functional Materials College of Materials Science and Engineering Donghua University Shanghai 201620 China Contribution: Methodology (equal) Visualization (equal) Writing - review & editing (equal) Department of Materials Science and Technology Voutes Campus University of Crete Iraklio Heraklion 70013 Greece Contribution: Methodology (equal) Visualization (equal) Contribution: Investigation (equal) Visualization (equal) Contribution: Conceptualization (equal) Investigation (equal) Contribution: Methodology (equal) Contribution: Conceptualization (equal) Methodology (equal) Contribution: Conceptualization (equal) Investigation (equal) Methodology (equal) Writing - review & editing (equal) Contribution: Conceptualization (equal) Funding acquisition (lead) Methodology (equal) Supervision (equal) Writing - review & editing (equal)

We have determined the complex atomic structure of high-temperature α-Ag 9 GaTe 6 phase with a hexagonal lattice ( P 6 3 mc space group, a = b =8.2766 Å, c =13.4349 Å). The structure has outer [GaTe 4 ] 5− tetrahedrons and inner [Ag 9 Te 2 ] 5+ clusters. All of the Ag ions are disorderly distributed in the lattice. Seven types of the Ag atoms constitute the cage-like [Ag 9 Te 2 ] 5+ clusters. The highly disordered Ag ions vibrate in-harmonically, producing strong coupling between low frequency optical phonons and acoustic phonons. This in conjunction with a low sound velocity of 1354 m s −1 leads to an ultralow thermal conductivity of 0.20 W m −1 K −1 at 673 K. Meanwhile, the deficiency of Ga in Ag 9 Ga 1− x Te 6 compounds effectively optimizes the electronic transport properties. Ag 9 Ga 0.91 Te 6 attains a highest power factor of 0.40 mW m −1 K −2 at 673 K. All these contribute to a much-improved ZT value of 1.13 at 623 K for Ag 9 Ga 0.95 Te 6 , which is 41 % higher than that of the pristine Ag 9 GaTe 6 sample.

关键词： α-Ag9GaTe6 Crystal Structure Ga Deficiency Thermoelectrics Ultralow Lattice Thermal Conductivity

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：