检索结果-内蒙古大学图书馆

SSRN 2023年

作者： Wang, Yifei Wang, Jia Chen, Kangli Jiao, Yunke Chen, Tianhao Wu, Xinping Jiang, Xingwu Bu, Wenbo Liu, Changsheng Qu, Xue Key Laboratory for Ultrafine Materials of Ministry of Education School of Material Science and Engineering Frontiers Science Center for Materiobiology and Dynamic Chemistry East China University of Science and Technology Shanghai200237 China Department of Materials Science State Key Laboratory of Molecular Engineering of Polymers Fudan University Shanghai200433 China Key Laboratory for Advanced Materials Joint International Research Laboratory for Precision Chemistry and Molecular Engineering Feringa Nobel Prize Scientist Joint Research Center Frontiers Science Center for Materiobiology and Dynamic Chemistry Centre for Computational Chemistry Research Institute of Industrial Catalysis School of Chemistry and Molecular Engineering East China University of Science and Technology 130 Meilong Road Shanghai200237 China Wenzhou Institute of Shanghai University Wenzhou325000 China Shanghai Frontier Science Center of Optogenetic Techniques for Cell Metabolism Shanghai200237 China

Chemodynamic therapy (CDT) based on the generation of reactive oxygen species (ROS) is promising for cancer treatment. However, the intrinsic H2O2 is deficient for CDT, and GSH eliminates ROS to protect tumor cells from ROS cytotoxicity. Herein, we propose a strategy to switch the electrons flow direction of GSH for O2 reduction and ROS generation rather than ROS clearance, by using P(DA-Fc) nanoparticles which are polymerized from ferrocenecarboxylic acid (Fc) coupled dopamine. Mechanismly, P(DA-Fc) NPs with phenol-quinone conversion ability mimic NOX enzyme to deprive electrons from GSH to reduce O2 for H2O2 generation, the following •OH release can be triggered by Fc. Semiquinone radicals in P(DA-Fc) are significantly enhanced after GSH triggering, which are further demonstrated with strong single-electron reduction ability by calculation. In vitro and in vivo experiments demonstrate that P(DA-Fc) can consume intrinsic GSH to produce endogenous ROS, in which the ROS generation performs a strong dependence on GSH/pH level, and eventually cause tumor cells death. Our work makes the first attempt to reverse the function of GSH from ROS scavenger to ROS producer, explores new functions of PDA-based nanomaterials in CDT beyond photothermal reagents and drug carriers, provides a new strategy to improve CDT efficiency. © 2023, The Authors. All rights reserved.

关键词： Enzymes

来源：评论

学校读者我要写书评

暂无评论

An Efficient Method for Determining the Pozzolanic Reaction Degrees of Low-Calcium Supplementary Cementitious materials in Blended Cement Pastes

SSRN

引用

SSRN 2024年

作者： Wang, Tiao Medepalli, Satya Zheng, Yuqian Krishnan, Sreejith Li, Ning Ishida, Tetsuya Zhang, Zuhua Bishnoi, Shashank Zhang, Kun Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education Department of Civil Engineering Materials School of Material Science and Engineering Tongji University Jiading campus 4800 Cao an Road Shanghai201804 China Concrete Laboratory Department of Civil Engineering School of Engineering The University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo113-8656 Japan School of Civil Engineering University of Leeds YorkshireLS2 9JT United Kingdom Department of Solids and Structures University of Manchester ManchesterM13 9PL United Kingdom Department of Civil Engineering Indian Institute of Technology Delhi Hauz Khas New Delhi110016 India

The pozzolanic reaction degree of supplementary cementitious materials (SCMs) is a crucial parameter influencing the performance of SCM-blended concrete. Although several methods, such as partial-or-no-known-crystal-structure (PONKCS) analysis with X-ray diffraction (XRD) testing and thermodynamic modelling, have been developed to estimate the pozzolanic reaction degree of SCMs, they have their own challenges in achieving reliable estimation. Ethylenediaminetetraacetic acid (EDTA) with NaOH is an efficient and reliable agent for selectively dissolving calcium-rich phases (e.g., cement clinkers and hydration products) without dissolving low-calcium SCMs. In this study, the ionic selective dissolution method (ISDM) that combines the use of an EDTA–NaOH dissolving agent and inductively coupled plasma–optical emission spectroscopy is developed to efficiently and reliably determine the pozzolanic reaction degree of low-calcium SCMs. Furthermore, the chemical compositions of aluminium-incorporated calcium–silicate–hydrate gel are determined via the ISDM coupled with the Rietveld analysis of XRD data and thermogravimetric analysis, according to mass conservation principles. © 2024, The Authors. All rights reserved.

关键词： Sodium hydroxide

来源：评论

学校读者我要写书评

暂无评论

Bioceramics in the CaMgSi2O6–Li2O System: A Glass-Ceramic Strategy for Excellent Mechanical Strength and Enhanced Bioactivity by Spontaneous Elemental Redistribution

引用

advanced materials Interfaces 2023年第12期10卷

作者： Tseng, Yu-Sheng Su, Yun-Han Chen, Chia-Lin Zhang, Ji Wang, Chih-Kuang Hanaor, Dorian Amir Henry Chen, Wen-Fan Institute of Medical Science and Technology National Sun Yat-Sen University Kaohsiung80424 Taiwan School of Materials Science and Engineering UNSW Sydney SydneyNSW2052 Australia Department of Medicinal and Applied Chemistry Kaohsiung Medical University Kaohsiung80708 Taiwan Chair of Advanced Ceramic Materials Technische Universität Berlin Straße des 17. Juni 135 Berlin10623 Germany

A novel glass-ceramic strategy for synthesizing mixed phase diopside (CaMgSi2O6)–lithium oxide (Li2O) bioceramics with excellent mechanical strength, superior biodegradation resistance, low environmental pH impact, enhanced bioactivity, and reasonable biocompatibility is developed for biomedical applications. The substitution of Li2O for MgO in CaMgSi2O6 stimulates the formation of secondary phases: CaSiO3, Li2Si2O5, SiO2, Li2SiO3, and Li2Ca2Si5O13. The evolution of CaSiO3 improves the surface hydroxyapatite (HAp) formation but lowers the mechanical strength and biological resistance, while the amorphous Li2Si2O5 phase tremendously reinforces the bioceramics by densifying the microstructure, indicating the simultaneous enhancement of bioactivity, mechanical strength, and durability. The promoted HAp formation is induced by the elemental redistribution where Mg elements are concentrated in large CaMgSi2O6 grains embedded in Li2Si2O5 amorphous matrix, which hinders the Mg2+ release and its readsorption by HAp. The cell viability is affected by Li2O substitution because of the high-dose Li+. In the current work, Li0.25 (25 mol% Li2O) has the highest hardness (700 Hv as sintered and 197 Hv after simulated body fluid soaking), lowest weight loss (≈0.6 wt%), lowest pH variation (≈8.1), efficient HAp formation, and reasonable cell viability (70.5%), demonstrating its remarkable potential for bone implant applications due to the synergistic structural densification and biological improvement. © 2023 The Authors. advanced materials Interfaces published by Wiley-VCH GmbH.

关键词： Bioactivity

来源：评论

学校读者我要写书评

暂无评论

programmable Real-Time Magnon Interference in Two Remotely Coupled Magnonic Resonators

arXiv

引用

arXiv 2023年

作者： Song, Moojune Polakovic, Tomas Lim, Jinho Cecil, Thomas W. Pearson, John Divan, Ralu Kwok, Wai-Kwong Welp, Ulrich Hoffmann, Axel Kim, Kab-Jin Novosad, Valentine Li, Yi Materials Science Division Argonne National Laboratory LemontIL60439 United States Department of Physics Korea Advanced Institute of Science and Technology Daejeon34141 Korea Republic of Physics Division Argonne National Laboratory LemontIL60439 United States Department of Materials Science and Engineering University of Illinois Urbana-Champaign UrbanaIL61820 United States High Energy Physics Division Argonne National Laboratory LemontIL60439 United States Center for Nanoscale Materials Argonne National Laboratory ArgonneIL60439 United States

Magnon interference is a signature of coherent magnon interactions for coherent information processing. In this work, we demonstrate programmable real-time magnon interference, with examples of nearly perfect constructive and destructive interference, between two remotely coupled yttrium iron garnet spheres mediated by a coplanar superconducting resonator. Exciting one of the coupled resonators by injecting single- and double-microwave pulse leads to the coherent energy exchange between the remote magnonic resonators and allows us to realize a programmable magnon interference that can define an arbitrary state of coupled magnon oscillation. The demonstration of time-domain coherent control of remotely coupled magnon dynamics offers new avenues for advancing coherent information processing with circuit-integrated hybrid magnonic networks. © 2023, CC BY.

关键词： Superconducting resonators

来源：评论

学校读者我要写书评

暂无评论

Piezoelectric Transition in a Nonpyroelectric Gyroidal Metal-Organic Framework

arXiv

引用

arXiv 2025年

作者： Kitou, Shunsuke Ishikawa, Hajime Tokunaga, Yusuke Ueno, Masato Sawa, Hiroshi Nakamura, Yuiga Kinoshita, Yuto Miyamoto, Tatsuya Okamoto, Hiroshi Kindo, Koichi Arima, Taka-Hisa Department of Advanced Materials Science The University of Tokyo Kashiwa277-8561 Japan Institute for Solid State Physics The University of Tokyo Kashiwa277-8581 Japan Department of Applied Physics Nagoya University Nagoya464-8603 Japan SPring-8 Hyogo679-5198 Japan Department of Engineering Nagoya Institute of Technology Nagoya466-8555 Japan Wako351-0198 Japan

Among the thirty-two crystallographic point groups, 432 is the only one that lacks an inversion center but does not exhibit piezoelectricity. A gyroidal structure belongs to point group 432 and shows characteristic physical properties attributed to its distinctive strong isotropic network. Here, we investigate a gyroidal cobalt oxalate metal-organic framework (MOF) with disordered orientations of SO4 tetrahedra. Synchrotron X-ray diffraction experiments using a single crystal reveal a cubic-to-cubic structural phase transition at TS = 120 K. This transition involves a change in the point group from nonpiezoelectric 432 to piezoelectric 23. The symmetry change arises from the ordering of distorted SO4 molecules, leading to a three-dimensional helical arrangement of electric dipole moments. Furthermore, pyroelectric current measurements using polycrystalline pellet samples reveal that electric polarization emerges below TS depending on the magnitude of the pelletizing pressure, demonstrating piezoelectricity. The gyroidal MOF offers an opportunity to explore unique dielectric properties induced by the helical ordering of molecules and structural flexibility. Copyright © 2025, The Authors. All rights reserved.

关键词： Single crystals

来源：评论

学校读者我要写书评

暂无评论

In Situ Synchrotron Investigation of Tensile Deformation and Failure Mechanisms in Cold Spray Cr-Coated Zr-Alloy System

SSRN

引用

SSRN 2023年

作者： Dabney, Tyler Sasidhar, K.N. Yeom, Hwasung Miao, Yinbin Mo, Kun Jamison, Laura Sridharan, Kumar Department of Materials Science and Engineering University of Wisconsin-Madison MadisonWI53706 United States Department of Nuclear Engineering and Engineering Physics University of Wisconsin-Madison MadisonWI53706 United States Division of Advanced Nuclear Engineering Pohang University of Science and Technology Pohang37673 Korea Republic of Chemical and Fuel Cycle Technologies Division Argonne National Laboratory LemontIL60439 United States

The tensile deformation behavior of cold spray chromium-coated zirconium-alloy at room temperature was investigated using in situ synchrotron diffraction. Uniaxial tensile tests were performed on as-deposited Cr-coated Zr-alloy specimens and after annealing at 750 °C for 30 minutes. While the coatings on both types of samples remained strongly adherent to the Zr-alloy substrate through the course of the tensile test, localized crack formation was observed in the Cr coatings. However, the cracks were more circuitous in the annealed specimens. Detailed line profile analysis of the in situ diffraction data also revealed that the cold spray deposited/annealed bcc Cr coatings were composed of unique dislocation distribution in comparison to conventionally processed Cr. The dislocation density in the as-deposited Cr coating was found to be significantly high, sufficient for nucleation of cracks during initial stages of tensile deformation. This dislocation density constituted nearly equal fraction of edge and screw components, as opposed to the high edge dislocation fraction expected in conventional low strain-rate room temperature deformation of Cr. The annealing treatment was found to produce a heterogeneous distribution of dislocations. This led to the retention of a unique, screw-dislocation-dominated sub-structure that enhanced the resistance to crack propagation in the annealed Cr-coating. © 2023, The Authors. All rights reserved.

关键词： Room temperature

来源：评论

学校读者我要写书评

暂无评论

Dual-Approach for Synergistic Doxorubicin Removal Through Adsorption-Photocatalysis

SSRN

引用

SSRN 2025年

作者： Rizwan, Muhammad Kayani, Kanza Qamar, Zahid Liu, Zhenping Roy, Vellaisamy A.L. Functional Materials Lab Department of Physics Air University Sector E-9 Islamabad44000 Pakistan South China Academy of Advanced Optoelectronics South China Normal University Guangzhou China School of Science and Technology Hong Kong Metropolitan University Ho Man Tin Hong Kong James Watt School of Engineering United Kingdom

The increasing presence of emerging organic contaminants (EOCs), including pharmaceuticals, constitutes a serious threat to aquatic biological systems and human beings primarily due to the persistence and bioaccumulative nature of EOCs. Among these, the widespread pollution causing chemotherapeutic agent doxorubicin (DOX) is now becoming a serious environmental contaminant due to improper disposal. This study presents a dual-function nanohybrid comprising of cobalt ferrite-MXene ( ) synthesized via a wet sonication method as a very effective material for the removal of DOX through synergistic adsorption and photocatalysis. Comprehensive structural, morphological and optical properties have been investigated by XRD, TEM, UV-Vis and FTIR, which confirmed successful fabrication of nanohybrid. Under optimized circumstance, nanohybrid demonstrates remarkable adsorption capacity (15.16 mg/g) and photocatalytic efficiency, leading to a 97% DOX removal at pH 8.5. The adsorption process is based on pseudo-second-order kinetics as well as Sips isotherms, highlighting multilayer adsorption on heterogeneous active sites. Enhanced photocatalytic degradation is attributed to the formation of a Schottky junction which promotes efficient electron-hole separation. The recyclability of the material is proven up to five cycles with negligible loss in performance which indicates stability and reusability. Hence, serves as highly stable and recyclable photocatalytic adsorbent, offering a cost effective and eco-friendly solution for the removal of DOX. Its enhanced performance without generating secondary toxic substances, making it a sustainable approach for environmental remediation. © 2025, The Authors. All rights reserved.

关键词： Reusability

来源：评论

学校读者我要写书评

暂无评论

Effect of base metal pre-treatment on liquation cracking of K447A nickel-based superalloy repaired by laser cladding

引用

Journal of Alloys and Compounds 2025年 1034卷

作者： Gao, Zhihang Zhao, Yue Shan, Jiguo Liu, Yan Chen, Hui Zhang, Zhenlin Key Laboratory of Advanced Technologies of Materials School of Materials Science and Engineering Southwest Jiaotong University Chengdu610031 China High-end Equipment Advanced Materials and Manufacturing Technology Laboratory Chengdu610031 China Department of Mechanical Engineering Tsinghua University Beijing100084 China Key Laboratory for Advanced Materials Processing Technology Ministry of Education Beijing100084 China

Liquation cracking in the heat-affected zone (HAZ) remains a critical challenge during laser cladding repair of K447A nickel-based superalloy. In this study, the base metal (BM) was pre-treated at graded temperatures of 1150 °C, 1200 °C, and 1250 °C to systematically investigate the influence of BM conditions on HAZ liquation cracking during laser cladding repair. The results reveal that the crack tendency first decreases and then increases as the pre-treatment temperature rises. The BM pre-treated at 1200 °C exhibiting the lowest liquation cracking tendency. In this case, the longitudinal section includes four cracks and a total crack length of 119.7 μm, in which the longest crack is 42.4 μm. Compared to those of the as-cast BM, these values are reduced by 68 %, 91 %, and 87 %, respectively. As-cast BM consists of the γ matrix, γ' phase, M5B3 phase, and Ni21Hf8 phase. The BM specimens pre-treated at 1150 °C and 1200 °C are both composed of the γ matrix, γ' phase, M5B3 phase, and MC(2) carbide, primarily due to the decomposition of Ni21Hf8 at high temperatures, and the released Hf element combines with the carbon in the matrix to form MC(2). However, compared with the BM pre-treated at 1150 °C, the boride content in the BM pre-treated at 1200 °C is significantly reduced. The microstructure of the BM pre-treated at 1250 °C is similar to that of the as-cast BM. This is attributed to the liquation of Ni21Hf8 during the pre-treatment process and the re-precipitation of Ni21Hf8 and nickel-rich borides during cooling. Pre-treatment alters the BM's microstructure, which in turn changes the liquation temperature and mechanism in the HAZ during laser cladding. This change affects the liquation cracking tendency of the BM. As the pre-treatment temperature increases, the initial melting temperature of the BM first increases and then decreases. Compared with the as-cast BM, the initial melting reaction of the BM pre-treated at 1200 °C shifts to M5B3/γ component liquation. The i

关键词： Heat affected zone

来源：评论

学校读者我要写书评

暂无评论

Thermal Conductivity of Water at Extreme Conditions

arXiv

引用

arXiv 2023年

作者： Zhang, Cunzhi Puligheddu, Marcello Zhang, Linfeng Car, Roberto Galli, Giulia Pritzker School of Molecular Engineering University of Chicago ChicagoIL60637 United States Materials Science Division Center for Molecular Engineering Argonne National Laboratory LemontIL60439 United States Program in Applied and Computational Mathematics Princeton University PrincetonNJ08544 United States Department of Chemistry Department of Physics Princeton Institute for the Science and Technology of Materials Princeton University PrincetonNJ08544 United States Department of Chemistry University of Chicago ChicagoIL60637 United States

Measuring the thermal conductivity (κ) of water at extreme conditions is a challenging task and few experimental data are available. We predict κ for temperatures and pressures relevant to the conditions of the Earth mantle, between 1,000 and 2,000 K and up to 22 GPa. We employ close to equilibrium molecular dynamics simulations and a deep neural network potential fitted to density functional theory data. We then interpret our results by computing the equation of state of water on a fine grid of points and using a simple model for κ. We find that the thermal conductivity is weakly dependent on temperature and monotonically increases with pressure with an approximate square-root behavior. In addition we show how the increase of κ at high pressure, relative to ambient conditions, is related to the corresponding increase in the sound velocity. Although the relationships between the thermal conductivity, pressure and sound velocity established here are not rigorous, they are sufficiently accurate to allow for a robust estimate of the thermal conductivity of water in a broad range of temperatures and pressures, where experiments are still difficult to perform. Copyright © 2023, The Authors. All rights reserved.

关键词： Thermal conductivity

来源：评论

学校读者我要写书评

暂无评论

Ce and Er Co-doped TiO2 for rapid bacteria- killing using visible light

引用

Bioactive materials 2020年第2期5卷 201-209页

作者： Yawei Ren Yajing Han Zhaoyang Li Xiangmei Liu Shengli Zhu Yanqin Liang Kelvin Wai Kwok Yeung Shuilin Wu The Key Laboratory of Advanced Ceramics and Machining Technology by the Ministry of Education of China School of Materials Science&EngineeringTianjin UniversityTianjin300072China Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials Hubei Key Laboratory of Polymer MaterialsSchool of Materials Science&EngineeringHubei UniversityWuhan430062China Department of Orthopaedics&Traumatology Li Ka Shing Faculty of MedicineThe University of Hong KongPokfulamHong Kong999077China

Bacterial infection and related diseases are threatening the health of human *** disinfection as a simple and low-cost disinfection strategy is attracting more and more *** this work,TiO2 nanoparticles(NPs)were modified by co-doping of Ce and Er using the sol-gel method,which endowed TiO2 NPs with enhanced visible light photocatalytic performance but not pure ultraviolet photocatalytic properties compared the untreated *** results disclosed that as the doping content of Er increased,the photocatalytic activity of modified TiO2 NPs initially increased and subsequently *** same trend occurred for Ce *** the doping dose of Er and Ce is 0.5 mol%and 0.2 mol%,the 0.5Ce0.2Ti-O calcined at 800℃ presented the best antibacterial properties,with the antibacterial efficiency of 91.23%and 92.8%for Staphylococcus aureus and Escherichia coli,*** existence of Er ions is thought to successfully turn the near-infrared radiation into visible region,which is easier to be absorbed by TiO2 ***,the addition of Ce ions can effectively extend spectral response range and inhibit the recombination of electrons and holes,enhancing the photocatalytic disinfection activity of co-doped TiO2.

关键词： Photocatalytic TiO2 Antibacterial Doping Light responsive

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：