检索结果-内蒙古大学图书馆

Effective reduction of matrix thermal conductivity through composite softening

Newton 2025年第1期1卷

作者： Jiajing Huang James Patrick Male Yandong Sun Ramya Gurunathan Pochung Huang Gerald Jeffrey Snyder Yue Lin CAS Key Laboratory of Design and Assembly of Functional Nanostructures and State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou Fujian 350002 China Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou Fujian 350108 China University of Chinese Academy of Sciences Beijing 100049 China Department of Materials Science and Engineering Northwestern University Evanston IL 60208 USA Materials Science and Engineering Division National Institute of Standards and Technology Gaithersburg 20899 MD USA

Conventional wisdom suggests that incorporating high-thermal-conductivity nanomaterials, such as graphene and carbon nanotubes, can enhance the thermal conductivity of composite matrices. However, our study on graphene nanoplatelets (GNPs) within a lead telluride (PbTe) matrix, along with an extensive review of 18 composites, reveals that such additions can lead to a significant decrease in thermal conductivity. This reduction is attributed to a decrease in phonon velocity, as seen by measuring the sound velocity v s , which strongly impacts lattice thermal conductivity ( κ L ). For instance, a volume fraction of just 1.47% GNPs results in an 11.1% reduction in PbTe’s v s , cutting κ L by 29.7%. We introduce a dimensionless parameter, χ , derived from the contrasts in Young’s modulus and density between the composite constituents. This parameter allows for the prediction of the degree to which v s and, consequently, κ L are reduced, based on the mechanical properties of the composite components. Alongside interfacial phonon scattering, this research pivots the focus toward composite softening as a critical factor in manipulating thermal conductivity.

关键词： structure-properties relationship composites phenomenological model thermal conductivity graphene thermoelectrics

来源：评论

学校读者我要写书评

暂无评论

A strategy for accurate detection of glucose in human serum and whole blood based on an upconversion nanoparticles-polydopamine nanosystem

引用

Nano Research 2018年第6期11卷 3164-3174页

作者： Yan Liu Datao Tu Wei Zheng Lianyu Lu Wenwu You Shanyong Zhou Ping Huang Renfu Li Xueyuan Chen CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Key Laboratory of Nanomaterials Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou 350002 China University of Chinese Academy of Sciences Beijing 100049 China

The accurate detection of blood glucose is of critical importance in the diagnosis and management of diabetes and its complications. Herein, we report a novel strategy based on an upconversion nanoparticles-polydopamine （UCNPs-PDA） nanosystem for the accurate detection of glucose in human serum and whole blood through a simple blending of test samples with ligand-free UCNPs, dopamine, and glucose oxidase （GOx）. Owing to the high affinity of lanthanide ions exposed on the surface of ligand-free UCNPs, dopamine monomers could spontaneously attach to the UCNPs and further polymerize to form a PDA shell resulting in a remarkable upconversion luminescence （UCL） quenching （97.4%） of UCNPs under 980-nm excitation. Such UCL quenching can be effectively inhibited by H2O2 produced from the GOx/glucose enzymatic reaction, thus enabling the detection of H2O2 or glucose based on the UCL quenching/inhibition bioassay. Owing to the highly sensitive UCL response and background-free interference of the UCNPs-PDA nanosystem, we achieved a sensitive, selective, and high-throughput bioassay for glucose in human serum and whole blood, thereby revealing the great potential of the UCNPs-PDA nanosystem for the accurate detection of blood glucose or other HRO2-generated biomolecules in clinical bioassays.

关键词： upconversion nanoparficles polydopamine F6rster resonance energy transfer blood glucose bioassay

来源：评论

学校读者我要写书评

暂无评论

Cyanide-based Covalent Organic Frameworks for Enhanced Overall Photocatalytic Hydrogen Peroxide Production

引用

Angewandte Chemie 2024年第19期136卷

作者： Enbo Zhou Futong Wang Xiang Zhang Yangdan Hui Prof. Yaobing Wang CAS Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Provincial Key Laboratory of Nanomaterials State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou 350002 Fujian P. R. China University of Chinese Academy of Sciences Beijing 100049 P. R. China Fujian Science and Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou 350108 Fujian P. R. China Fuzhou University Fuzhou 350108 Fujian P. R. China

Photocatalytic oxygen reduction to produce hydrogen peroxide (H 2 O 2 ) is a promising route to providing oxidants for various industrial applications. However, the lack of well-designed photocatalysts for efficient overall H 2 O 2 production in pure water has impeded ongoing research and practical thrusts. Here we present a cyanide-based covalent organic framework (TBTN-COFs) combining 2,4,6-trimethylbenzene-1,3,5-tricarbonitrile (TBTN) and benzotrithiophene-2,5,8-tricarbaldehyde (BTT) building blocks with water-affinity and charge-separation. The ultrafast intramolecular electron transfer (<500 fs) and prolonged excited state lifetime (748 ps) can be realized by TBTN-COF, resulting in a hole accumulated BTT and electron-rich TBTN building block. Under one sun, the 11013 μmol h −1 g −1 yield rate of H 2 O 2 can be achieved without any sacrificial agent, outperforming most previous reports. Furthermore, the DFT calculation and in situ DRIFTS spectrums suggesting a Yeager-type absorption of *O 2 ⋅ − intermediate in the cyanide active site, which prohibits the formation of superoxide radical and revealing a favored H 2 O 2 production pathway.

关键词： Covalent organic framework Photocatalytic H2O2 production Oxygen reduction reaction Charge-separation Intramolecular electron transfer

来源：评论

学校读者我要写书评

暂无评论

Molten-Salt-Assisted Synthesis of Bismuth Nanosheets for Long-term Continuous Electrocatalytic Conversion of CO2 to Formate

引用

Angewandte Chemie 2020年第45期132卷

作者： Yi L. Chen J. Shao P. Huang J. Peng X. Li J. Wang G. Zhang C. Wen Z. CAS Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Provincial Key Laboratory of Nanomaterials Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou 350002 China University of Chinese Academy of Science Beijing 100049 China

Two-dimensional (2D) monometallic pnictogens (antimony or Sb, and bismuth or Bi) nanosheets demonstrate potential in a variety of fields, including quantum devices, catalysis, biomedicine and energy, because of their unique physical, chemical, electronic and optical properties. However, the development of general and high-efficiency preparative routes toward high-quality pnictogen nanosheets is challenging. A general method involving a molten-salt-assisted aluminothermic reduction process is reported for the synthesis of Sb and Bi nanosheets in high yields (>90 %). Electrocatalytic CO2 reduction was investigated on the Bi nanosheets, and high catalytic selectively to formate was demonstrated with a considerable current density at a low overpotential and an impressive stability. Bi nanosheets continuously convert CO2 into formate in a flow cell operating for one month, with a yield rate of 787.5 mmol cm−2 h−1. Theoretical results suggest that the edge sites of Bi are far more active than the terrace sites. © 2020 Wiley-VCH GmbH

关键词： bismuth nanosheets electrocatalysis formate long-term operation selectivity

来源：评论

学校读者我要写书评

暂无评论

Ultrasensitive detection of cancer biomarker microRNA by amplification of fluorescence of lanthanide nanoprobes

引用

Nano Research 2018年第1期11卷 264-273页

作者： Lianyu Lu Datao Tu Yan Liu Shanyong Zhou Wei Zheng Xueyuan Chen College of Chemistry Fuzhou University Fuzhou 350116 China CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Provincial Key Laboratory of Nanomaterials Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou 350002 China

Sensitive detection of cancer biomarker microRNAs （miRNAs） is of vital importance for cancer diagnosis and treatment. Nonetheless, the detection sensitivity in the existing miRNA bioassays is severely limited by the structural characteristics of miRNA （including small length and high sequence homology） because most of these methods are based on target amplification. Herein, we report a novel approach to sensitive and specific detection of low-abundance miRNA via a unique strategy of nanoprobe dissolution-enhanced fluorescence amplification, in which a capture probe featuring molecular beacon structure is designed. By means of this strategy, miRNA-21 was detected in a linear range from 10 fM to 100 pM with a detection limit as low as 1.38 fM. High selectivity of the newly developed biosensor was demonstrated by the good discrimination against a target with a single-base mismatch. Furthermore, this assay was used for the detection of miRNA-21 added into fetal bovine serum samples with the recovery in the range of 90.2%--108% and coefficients of variation below 10.1%, indicating its promising applications to RNA immunoassays and early cancer diagnosis.

关键词： microRNA lanthanide nanoparticles fluorescence amplification cancer biomarker molecular beacon

来源：评论

学校读者我要写书评

暂无评论

Synthesis,Crystal Structure and Photoluminescence of a Dinulear Copper Complex

引用

Chinese Journal of Structural Chemistry 2018年第10期37卷 1645-1650页

作者： LI Xiao-Ning WU Xiao-Yuan ZHAO Wan-Wan YANG Ming-Xue YU Rong-Min LU Can-Zhong CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Provincial Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of Sciences College of Chemistry and Materials Science Fujian Normal University

A binuclear cuprous complex [Cu（μ-I）（NPPh）]2（1,NPPh = 1-（2-（diphenylphosphanyl）phenyl）-3-phenyl-4,5-dihydro-1 H-pyrazole） was synthesized and characterized by elemental analysis,NMR and X-ray single-crystal structure *** crystallizes in triclinic space group P2_1/n with a = 10.7520（3）,b = 18.1860（5）,c = 11.8487（3）？,β = 91.864（2）,V = 2315.61（11）？~3,Z = 4,Mr = 594.87,Dc = 1.706 g/cm^3,F（000） = 1176.0,μ = 12.582 mm（-1）,GOOF = 1.048,the final R = 0.0289 and wR = 0.0670 for 3787 observed reflections with I 〉 2σ（I）.The Cu atoms in the complex are four-coordinated and adopt distorted tetrahedral coordination *** the solid state,the complex exhibits greenish yellow photoluminescence with a peak maximum of 533 nm,a decay time of 34 μs,and a photoluminescence quantum yield of 63.6% at room temperature,respectively.

关键词： cuprous complex crystal structure emissive property

来源：评论

学校读者我要写书评

暂无评论

Coupled Solar Battery with 6.9 % Efficiency

引用

Angewandte Chemie 2023年第30期135卷

作者： Lei Jiao Dr. Xiang Zhang Dr. Yangyang Feng Dr. Jing Lin Prof. Daqiang Yuan Prof. Yaobing Wang CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Provincial Key Laboratory of Nanomaterials State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou 350002 Fujian P. R. China University of Chinese Academy of Sciences Beijing 100049 P. R. China Fujian Science and Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou 350108 Fujian P. R. China

Solar-to-electrochemical energy storage in solar batteries is an important solar utilization technology comparable to solar-to-electricity (solar cells) and solar-to-fuel (photocatalytic cells) conversion. Unlike the indirect approach of integrated solar flow batteries combining photoelectrodes with redox-electrodes, coupled solar batteries enable direct solar energy storage, but are hampered by low efficiency due to rapid charge recombination of materials and misaligned energy levels between electrodes. Herein, we propose a design for a coupled solar battery that intercouples two photo-coupled ion transfer (PCIT) reactions through electron-ion transfer upon co-photo-pumping of photoelectrochemical storage cathode and anode. We used a representative covalent organic framework (COF) to achieve efficient charge separation and directional charge transfer between two band-matched photoelectrochemical storage electrodes, with a photovoltage sufficient for COF dual-redox reactions. By pumping these electrodes, the coupled solar battery stores solar energy via two synergistic PCIT reactions of electron-proton-relayed COF oxidation and reduction, and the stored solar energy is released as electrochemical energy during COF regeneration in discharge while interlocking the loops. A breakthrough in efficiency (6.9 %) was achieved, adaptive to a large-area (56 cm 2 ) tandem device. The presented photo-intercoupled electron-ion transfer (PIEIT) mechanism provides expandable paths toward practical solar-to-electrochemical energy storage.

关键词： Coupled Solar Battery Covalent Organic Framework Photo-Intercoupled Electron-Ion Transfer Photoelectrochemical-Storage Electrode Solar-to-Electrochemical Energy Storage

来源：评论

学校读者我要写书评

暂无评论

Fabrication of WO3/TiO2 Heterostructures for Efficiently Photocatalytic Gaseous Hydrocarbons Degradation:Origin of Photoactivity and Revisit the Role of WO3 Decoration

引用

Chinese Journal of Structural Chemistry 2018年第2期37卷 230-241页

作者：王丹潘晓阳王广涛易志国 CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Provincial Key Laboratory of Nanomaterials Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences College of Physics and Materials Science Henan Normal University

Efficient oxidation of gaseous small molecular hydrocarbons under mild conditions remains a significant but challenging task to date. Here we report that WO3 decoration can obviously improve the performance of TiO2 （P25） toward the photocatalytic oxidation of several small molecular hydrocarbons （C2H6, C3H8 and C2H4） under simulated solar light irradiation. Among the WO3/TiO2 heterostructures, the 10wt%WO3/TiO2 nanocomposite shows the best photoactivities, which can efficiently oxidize C2H6, C3H8 and C2H4 within 15, 9 and 8 minutes, respectively under simulated sunlight with a light intensity of 200 mW/cm2. By strong contrast, a decreased photoactivity of TiO2 by coupling with WO3 is observed when investigating the performance of photocatalysts toward the degradation of methylene blue （MB） in liquid phase. The opposing effect of WO3 decoration on the performance of TiO2 is thoroughly investigated, and it is found that the improved photoactivities for gaseous hydrocarbon degradation is ascribed to the enhanced oxygen adsorption, resulting from WO3 decoration rather than efficient charge separation within the WO3/TiO2 heterostructures.

关键词： WO3, TiO2, photocatalytic, hydrocarbons OI

来源：评论

学校读者我要写书评

暂无评论

Tumor-Microenvironment-Responsive Biodegradable Nanoagents Based on Lanthanide Nucleotide Self-Assemblies toward Precise Cancer Therapy

引用

Angewandte Chemie 2022年第14期134卷

作者： Yingjie Yang Dr. Yan Liu Prof. Dr. Datao Tu Dr. Mingmao Chen Yunqin Zhang Hang Gao Prof. Dr. Xueyuan Chen CAS Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Key Laboratory of Nanomaterials and State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou Fujian 350002 China University of Chinese Academy of Sciences Beijing 100049 China College of Biological Science and Engineering Fuzhou University Fuzhou Fujian 350108 China

Stimuli-responsive nanoagents, which simultaneously satisfy normal tissue clearance and tumor-specific responsive treatment, are highly attractive for precise cancer theranostics. Herein, we develop a unique template-induced self-assembly strategy for the exquisitely controlled synthesis of self-assembled lanthanide (Ln 3+ ) nucleotide nanoparticles (LNNPs) with amorphous structure and tunable size from sub-5 nm to 105 nm. By virtue of the low-temperature (10 K) and high-resolution spectroscopy, the local site symmetry of Ln 3+ in LNNPs is unraveled for the first time. The proposed LNNPs are further demonstrated to possess the ability for highly efficient loading and tumor-microenvironment-responsive release of doxorubicin. Particularly, sub-5 nm LNNPs not only exhibit excellent biocompatibility and predominant renal-clearance performance, but also enable efficient tumor retention. These findings reveal the great potential of LNNPs as a new generation of therapeutic platform to overcome the dilemma between efficient therapy and long-term toxicity of nanoagents for future clinical applications.

关键词： Chemotherapy Self-assembly Renal Clearance Site Symmetry Tumor-Microenvironment-Responsive

来源：评论

学校读者我要写书评

暂无评论

Investigation of sustainable rare earth recovery on carbon electrodes by electrosorption and precipitation coupling strategy

引用

Journal of Environmental Chemical Engineering 2025年第4期13卷

作者： Yanxin Wang Peilin Lei Yujun Chai Xiaoqi Sun College of Chemistry and Materials Science Hebei Normal University Shijiazhuang Hebei 050024 PR China Xiamen Institute of Rare Earth Materials Haixi Institute Chinese Academy of Sciences Xiamen 361021 PR China Hebei Key Laboratory of Inorganic Nano-materials Hebei Normal University Shijiazhuang Hebei 050024 PR China CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Key Laboratory of Nanomaterials Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou Fujian 350002 PR China University of Chinese Academy of Sciences Beijing 100049 PR China

This study investigates the recovery of rare earth (RE) using a coupling electrosorption and precipitation strategy. The electrochemical behavior and recovery properties of various materials, i.e., activated carbon, carbon nanofibers, carbon nanotubes, graphene, and porous carbon, were evaluated. They show the good crystalline, amorphous or the coexistence of two states. The reaction occurred on grapheme and carbon nanofiber within the scan range, but it shows the capacitive behavior for other three. The electrosorption-precipitation coupling capacity and removal efficiency varied due to the cooperation of applied voltage and inner voltage, in addition to the effect of functional groups, defects and conductivity. During the process, rare earth ions were first adsorbed onto the electrode surface and then reacted with OH - ions to form precipitates. Meanwhile, oxygen was generated at the Pt electrode, while only trace amounts of hydrogen were observed on the working electrode due to the involvement of NO 3 - ions. Additionally, La(Ⅲ), Ce(Ⅲ), Pr(Ⅲ) and Nd(Ⅲ) ions were effectively recovered and enriched using carbon-based electrodes, with capacities of 2064.5, 2305.8, 2198.7, and 2288.9 mg·g −1 , respectively, in a 0.01 mol·L −1 RE solution. These findings suggest that the selection of materials with larger specific surface areas, high electrical conductivity, more defects, effective functional groups and low potential can reduce internal voltage, enhance reaction driving forces, and improve recovery efficiency. The recovery process has sustainable RE separation characteristics, with no volatile organic solvent (VOC), acid and alkali consumption, or wastewater.

关键词：

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：