检索结果-内蒙古大学图书馆

SSRN 2023年

作者： Sato, Kazuhisa Huang, Yihui Kadowaki, Moeno Nakano, Takanori Kumada, Keigo Watanabe, Satoshi Kawada, Tatsuya Akbay, Taner Graduate School of Engineering Tohoku University Sendai980-8579 Japan National Institute of Technology Gifu College Gifu501-0495 Japan Graduate School of Environmental Studies Tohoku University Sendai980-8579 Japan Materials Science and Nanotechnology Engineering Department Yeditepe University 34755 Turkey Graduate School of Engineering Tohoku University Sendai980-8579 Japan

To efficiently assess the mechanical reliability and long-term durability of solid oxide fuel cells (SOFCs) and solid oxide electrolyser cells (SOECs), a suitable creep test method and prediction of the material response is necessary. This study investigates the effectiveness of the small punch (SP) testing method for Ni–YSZ composites and in rapidly determining the constitutive creep law for SOFC materials. The creep properties of Ni–YSZ composites are evaluated under a 1% H2 environment at temperatures of 800–900 °C and stresses of 36–58 MPa. The finite element method is used to simulate the SP tests and generate numerical creep curves. These curves are fitted to the experimental curves to obtain the parameter set in the creep constitutive law of the strain hardening model. The numerical and experimental creep curves are well-fitted with only a 0.44% difference and convergent parameter sets, indicating the usefulness of the SP method and creep constitutive law for characterising and predicting the creep properties of SOFC constituent materials. This study highlights the importance of accurate characterisation of creep properties for predicting the long-term performance and reliability of SOFCs. © 2023, The Authors. All rights reserved.

关键词： Creep

来源：评论

学校读者我要写书评

暂无评论

Flake-like structure of SrTiO3 nanoparticles dispersed on graphene oxide: A selective and sensitive electrochemical sensor for determination of chloramphenicol in milk and honey samples

引用

Food Chemistry 2024年 444卷

作者： Sakaleshpur Kumar, Gagankumar Ballur Prasanna, Sanjay Lokesh Marenahalli, Bhuvan Shadakshari, Sandeep Arehalli Shivamurthy, Santhosh Rajabathar, Jothi Ramalingam Chimatahalli Shanthakumar, Karthik Han, Young-Kyu Department of Chemistry SJCE JSS Science and Technology University Karnataka570006 India Department of Energy and Materials Engineering Dongguk University-Seoul Seoul100-715 Korea Republic of Taipei10608 Taiwan International PhD Program for Biomedical Engineering Taipei Medical University 250 Wuxing St Taipei11031 Taiwan N.M.K.R.V. College for Women's Karnataka 560011 India Department of Chemistry College of Science King Saud University P.O. Box. 2455 Riyadh11451 Saudi Arabia

The use of Chloramphenicol (CAP), a potent antibiotic with broad-spectrum capabilities in food-producing animals has been restricted by the European Union and several other countries due to its severe side effects. Thus, CAP must be detected quickly and sensitively. In this investigation, the preparation of SrTiO3 nanoparticles was carried out utilizing a hydrothermal technique. The as-synthesized strontium titanate was decorated on the graphene oxide (SrTiO3/GO) using an ultrasonication method. An electrochemical sensor was developed by employing a modified electrode consisting of SrTiO3/GO, which can accurately detect CAP in food samples. The synergistic effect of SrTiO3 and GO could improve the peak current response. Remarkably, the SrTiO3/GO-modified glassy carbon electrode has a LOD and sensitivity of 6.08 µM nM and 2.771 µA·μM−1·cm−2, respectively. This modified electrode was evaluated in food samples and had an outstanding reaction with a high percentage of recovery, which makes it a potential electrocatalyst for CAP detection. © 2024 Elsevier Ltd

关键词： Titanium compounds

来源：评论

学校读者我要写书评

暂无评论

The Shear Contribution to the Equation of State: A Universal Law for the Elastic Moduli of Solids

SSRN

引用

SSRN 2023年

作者： Burns, Stephen J. Burns, Sean P. Materials Science Program Department of Mechanical Engineering University of Rochester RochesterNY14627-0132 United States Mesoscale and Microscale Meteorology Division National Center for Atmospheric Research 3090 Center Green Drive BoulderCO80301 United States

Cauchy’s stress tensor, in the most generalized form, is known to be in two parts: a pressure plus octahedral shear stresses. Shear stress thermodynamics in pressurized and sheared systems are used to describe the physical shear properties of materials. Pressure alone does not fully describe solids although pressure is the basis for most equations of state. The thermal expansion coefficients are the major differences between normal and shear thermal strains. Shear-strain thermal expansion coefficients are central to predicting a material’s shear properties. Shear thermodynamics through the entropy-stress components predicts shear moduli proportional to a power-law in the specific volume. The concept is applied to all elastic moduli in solids and structures. Extensive empirical evidence supports elastic moduli that depend only on specific volume. The evidence is very extensive and leads to a new, generalized, universal, elastic moduli concept;it only applies to materials that support shear stresses i.e., solids. A shear equation of state is explored in detail with use of empirical data. © 2023, The Authors. All rights reserved.

关键词： Elasticity

来源：评论

学校读者我要写书评

暂无评论

Velocity-gauge Real-time Time-dependent Density Functional Tight-binding for Large-scale Condensed Matter Systems

arXiv

引用

arXiv 2023年

作者： Xu, Qiang Del Ben, Mauro Okyay, Mahmut Sait Choi, Min Ibrahim, Khaled Z. Wong, Bryan M. Materials Science & Engineering Program Department of Chemistry Department of Physics & Astronomy University of California-Riverside RiversideCA92521 United States Applied Mathematics & Computational Research Division Lawrence Berkeley National Laboratory BerkeleyCA94720 United States

We present a new velocity-gauge real-time, time-dependent density functional tight-binding (VG-rtTDDFTB) implementation in the open-source DFTB+ software package (https://***) for probing electronic excitations in large, condensed matter systems. Our VG-rtTDDFTB approach enables real-time electron dynamics simulations of large, periodic, condensed matter systems containing thousands of atoms with a favorable computational scaling as a function of system size. We provide computational details and benchmark calculations to demonstrate its accuracy and computational parallelizability on a variety of large material systems. As a representative example, we calculate laser-induced electron dynamics in a 512-atom amorphous silicon supercell to highlight the large periodic systems that can be examined with our implementation. Taken together, our VG-rtTDDFTB approach enables new electron dynamics simulations of complex systems that require large periodic supercells, such as crystal defects, complex surfaces, nanowires, and amorphous materials. Copyright © 2023, The Authors. All rights reserved.

关键词： Gages

来源：评论

学校读者我要写书评

暂无评论

Enhanced Localized Surface Plasmon Resonance of Gold Nanoparticles Synthesized on Cellulose Nanocrystals

Enhanced Localized Surface Plasmon Resonance of Gold Nanopar...

引用

IEEE International Conference on Nano/Molecular Medicine and engineering (NANOMED)

作者： Jaspreet Kaur Gurshagan Kandhola Joseph Batta-Mpouma Jingyi Chen Joshua Sakon Jin-Woo Kim University of Arkansas Fayetteville Arkansas USA Materials Science & Engineering Program and Institute for Nanoscience & Engineering University of Arkansas Fayetteville Arkansas USA

ISBN: (纸本)9781665458573

Plasmonic gold nanoparticles (AuNPs) exhibit a phenomenon called localized surface plasmon resonance (LSPR), making them suitable for several applications in nanotheranostics, bio-imaging and optoelectronic sensing. However, this property needs further tuning and enhancement to improve their sensitivity. Here, we developed hybrid nanocomposites by synthesizing AuNPs on the surface of cellulose nanocrystals (CNCs), with the hypothesis that confinement of collective oscillations of electrons at the interface of CNCs and AuNPs would lead to LSPR enhancement. This study uses a seed-mediated approach for growth of AuNPs on CNC surface and the ratio of gold salt to reducing agent was optimized to tune the growth. Ultraviolet/visible/near-infrared Spectroscopy, Dynamic Light Scattering, Atomic Force Microscopy and X-Ray Diffraction were used to validate hybrid formation and associated enhancement in LSPR.

关键词： Gold Spectroscopy X-ray scattering Sensitivity Nanocrystals X-ray diffraction Sensors

来源：评论

学校读者我要写书评

暂无评论

Effects of the unit-cell size and arrangement on the compressive behaviors of lattice structures in powder bed fusion additive manufacturing

Results in Materials

引用

Results in materials 2024年 22卷

作者： Park, Kwang-Min Roh, Young-Sook Lee, Bong-Chun Construction Technology Research Centre Construction Division Korea Conformity Laboratories Seoul 08503 South Korea Architectural Engineering Program Department of Architectural Engineering Seoul National University of Science and Technology Seoul 01811 South Korea Smart Construction Materials Centre Construction Division Korea Conformity Laboratories Chungbuk 28116 South Korea

Lattice structures demonstrate a unique compressive behavior wherein the compressive strength increases and converges to a specific value as the number of unit-cell arrangements and overall dimensions of the lattice structure increase. In this study, the effects of the unit-cell size and cell arrangement on the compressive behavior of lattice structures were investigated to determine the convergence of compression characteristics at specific unit-cell configurations. Simple cubic lattice structures were designed and manufactured using powder bed fusion techniques. The lattice structures were characterized using universal testing machines. Experimental results revealed that the convergence of compressive strength was influenced by the size of the unit cell: the number of arrangements at which a specific compressive strength was reached increased as the unit-cell sizes decreased. Furthermore, specific convergence points were determined for different unit-cell sizes, providing valuable insights into the compressive strength behavior of lattice structures. This study emphasizes the significance of considering both unit-cell arrangements and overall dimensions when designing standard specimens for compression testing. Additionally, the methodology developed in this study can be applied to obtain an optimal configuration for desired strength characteristics. © 2024 The Authors

关键词： Additive manufacturing Compressive behavior Lattice structure Powder bed fusion Unit-cell arrangement Unit-cell size

来源：评论

学校读者我要写书评

暂无评论

Lambda Theta Reflectometry for protein biosensing 17

Lambda Theta Reflectometry for protein biosensing

引用

Frontiers in Biological Detection: From Nanosensors to Systems XVII 2025

作者： Klose, Alanna M. Katz, Joseph D. Boni, Robert Miller, Benjamin L. Department of Dermatology University of Rochester RochesterNY14627 United States Materials Science Program University of Rochester RochesterNY14627 United States Laboratory of Laser Energetics University of Rochester RochesterNY14627 United States Department of Biomedical Engineering University of Rochester RochesterNY14627 United States

ISBN: (纸本)9781510684249

Label-free reflectometry sensors detect proteins by measuring the reflectance properties of a thin film on a substrate. As light encounters a thin film layer stack, reflections from the layer boundaries interfere with each other encoding information about layer properties onto the reflected light. Existing reflectometric techniques measure changes in thin film thickness by observing a change in the interference spectrum, polarization state or reflectance relative to an initial antireflective condition at fixed angle and wavelength. These techniques are used for biosensing by detecting changes in film thickness as analyte binds to surface-bound ligand. Existing approaches are limited by low multiplexing capability, limited sensitivity, or by requiring high manufacturing tolerances of the detector substrates. Lambda Theta Reflectometry (LTR) is a novel reflectometric technique that measures changes in film thickness by measuring the location of null reflectivity as a function of wavelength (lambda) and angle of incidence (theta). The substrate is simultaneously illuminated with a range of angles and wavelengths and reflected light is angularly and spectrally resolved. The optical thickness of the thin film is retrieved by fitting the location of the null in lambda theta space. A prototype LTR reflectometer has demonstrated the ability to measure SiO2 layer thickness with milli-Ångstrom precision. LTR measurements of SiO2/Si oxide films are in excellent agreement with spectroscopic ellipsometry for films thickness ranging from 1390-1465 Å. LTR enables sensitive measurements across a range of analyte concentrations without requiring stringent control over initial layer stack thickness. © 2025 SPIE.

关键词： Ellipsometry

来源：评论

学校读者我要写书评

暂无评论

Cyclic ferroelectric switching and quantized charge transport in CuInP2S6

引用

Physical Review B 2023年第18期108卷 L180101-L180101页

作者： Daniel Seleznev Sobhit Singh John Bonini Karin M. Rabe David Vanderbilt Department of Physics and Astronomy Center for Materials Theory Rutgers University Piscataway New Jersey 08854 USA Department of Mechanical Engineering University of Rochester Rochester New York 14627 USA Materials Science Program University of Rochester Rochester New York 14627 USA Center for Computational Quantum Physics Flatiron Institute 162 5th Avenue New York New York 10010 USA

The van der Waals layered ferroelectric CuInP2S6 has been found to exhibit a variety of intriguing properties arising from the fact that the Cu ions are unusually mobile in this system. While the polarization switching mechanism is usually understood to arise from Cu ion motion within the monolayers, a second switching path involving Cu motion across the van der Waals gaps has been suggested. In this work, we perform zero-temperature first-principles calculations on such switching paths, focusing on two types that preserve the periodicity of the primitive unit cell: “cooperative” paths preserving the system's glide mirror symmetry, and “sequential” paths in which the two Cu ions in the unit cell move independently of each other. We find that CuInP2S6 features a rich and varied energy landscape, and that sequential paths are clearly favored energetically both for cross-gap and through-layer paths. Importantly, these segments can be assembled to comprise a globally insulating cycle with the out-of-plane polarization evolving by a quantum as the Cu ions shift to neighboring layers. In this sense, we argue that CuInP2S6 embodies the physics of a quantized adiabatic charge pump.

关键词： Electric polarization Electronic structure Ferroelectricity Phonons Structural phase transition

来源：评论

学校读者我要写书评

暂无评论

Field driven cluster formation in two-dimensional colloidal binary mixtures

arXiv

引用

arXiv 2022年

作者： Qian, Dingwen de la Cruz, Monica Olvera Applied Physics Program Northwestern University EvanstonIL60208 United States Applied Physics Program Departments of Materials Science and Engineering Chemistry and Physic and Astronomy Northwestern University EvanstonIL60208 United States

We study size- and charge-asymmetric oppositely charged colloids driven by an external electric field. The large particles are connected by harmonic springs, forming a hexagonal-lattice network while the small particles are free of bonds and exhibit fluid-like motion. We show that this model exhibits a cluster formation pattern when the external driving force exceeds a critical value. The clustering is accompanied with stable wavepackets in vibrational motions of the large particles. Copyright © 2022, The Authors. All rights reserved.

关键词： Binary mixtures

来源：评论

学校读者我要写书评

暂无评论

Self-Powered, Flexible, and Instantly Dynamic Multi-Color Electroluminescence Device with Bi-Emissive Layers for Optical Communication

SSRN

引用

SSRN 2023年

作者： Sun, Junlu Liao, Juan Dong, Fuying Chang, Yu Chang, Shulong Mao, Xin Li, Na Li, Xi Wang, Yong Shang, Yuanyuan Wang, Bin Shan, Chong-Xin Dong, Lin Henan Key Laboratory of Diamond Optoelectronic Materials and Devices Key Laboratory of Materials Physics Ministry of Education School of Physics & Microelectronics Zhengzhou University 450052 China College of General Studies Shanxi Institute of Science and Technology 048000 China Department of Mechanical Engineering City University of Hong Kong China

Self-powered alternating current electroluminescence (ACEL) displays own distinctive preponderance in artificial electronic skins and information communication in the internet of things (IoT). However, their limited color options, i.e., monochrome or static multicolor, hinder their versatility. In this paper, we introduce an instantly dynamic multi-color display system that combines integrated bi-emissive layer ACEL with a dual-cells triboelectric nanogenerator (DC-TENG). Our bi-emissive ACEL device includes ZnS:Cu and ZnS:Mn phosphors blended in polydimethylsiloxane (PDMS) to achieve green and orange emissions, respectively. The DC-TENG consists of a polytetrafluoroetylene (PTFE) film and two copper tapes, generating an open-circuit voltage of ~270 V and a short-circuit current of ~2.5 μA, which is sufficient to power the bi-emissive layer ACEL device. By pressing the DC-TENG cell, the self-powered display system instantly renders green, orange and warm white emissions, making these dynamic multi-color responses useful as information units in the IoT. The self-powered optical communication system is demonstrated by transmitting the word "CHINA". Our study may provide a new approach for developing self-powered multi-color display systems and expands their potential applications in information communication for the IoT. © 2023, The Authors. All rights reserved.

关键词： Silicones

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：