Advances in Condensed Matter Physics最新文献_第10页

Research Advance on the Sensing Characteristics of Refractive Index Sensors Based on Electromagnetic Metamaterials 基于电磁超材料的折射率传感器传感特性研究进展

IF 1.5 4区物理与天体物理

Advances in Condensed Matter Physics Pub Date : 2021-07-19 DOI: 10.1155/2021/2301222

Zongli Wang, Xin Wang, Junlin Wang

{"title":"Research Advance on the Sensing Characteristics of Refractive Index Sensors Based on Electromagnetic Metamaterials","authors":"Zongli Wang, Xin Wang, Junlin Wang","doi":"10.1155/2021/2301222","DOIUrl":"https://doi.org/10.1155/2021/2301222","url":null,"abstract":"Among different sensing platforms, metamaterials composed of subwavelength or deep subwavelength sized metal resonance elements arrays that are etched on semiconductor substrates or dielectric substrates exhibit excellent characteristics due to the strong localization and enhancement of resonance electromagnetic fields. As a new type of detection method, metamaterial sensors can break through the resolution limit of traditional sensors for a small amount of substance and have the advantages of high sensitivity, fast response, and simple measurement. Significant enhancement of the sensing characteristics of metamaterial sensors was realized by optimizing microstructures (single split-ring, double split-ring, nested split-ring, asymmetric split-ring, three-dimensional split-ring, etc.), using ultrathin substrates or low-index substrate materials, etching away local substrate, and integrating microfluidic channel, etc. This paper mainly reviews the research advance on the improvement of sensing characteristics from optimizing resonance structures and changing substrate materials and morphology. Furthermore, the sensing mechanism and main characteristic parameters of metamaterial sensors are introduced in detail, and the development trend and challenge of metamaterial sensing applications are prospected. It is believed that metamaterial sensors will have potential broader application prospects in environmental monitoring, food safety control, and biosensing in the future.","PeriodicalId":7382,"journal":{"name":"Advances in Condensed Matter Physics","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2021-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77129317","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Electric Field Controlled Itinerant Carrier Spin Polarization in Ferromagnetic Semiconductors 铁磁半导体中电场控制的载流子自旋极化

IF 1.5 4区物理与天体物理

Advances in Condensed Matter Physics Pub Date : 2021-07-12 DOI: 10.1155/2021/6663876

Gezahegn Assefa

引用次数: 0

A Novel Elastic Metamaterial with Multiple Resonators for Vibration Suppression 一种具有多谐振腔的新型振动抑制弹性超材料

IF 1.5 4区物理与天体物理

Advances in Condensed Matter Physics Pub Date : 2021-06-02 DOI: 10.1155/2021/3914210

Saman Ahmadi Nooraldinvand, H. Sedighi, A. Yaghootian

{"title":"A Novel Elastic Metamaterial with Multiple Resonators for Vibration Suppression","authors":"Saman Ahmadi Nooraldinvand, H. Sedighi, A. Yaghootian","doi":"10.1155/2021/3914210","DOIUrl":"https://doi.org/10.1155/2021/3914210","url":null,"abstract":"In this paper, two models of elastic metamaterial containing one and two resonators are proposed to obtain the bandgaps with the aim of providing broadband vibration suppression. The model with one DOF is built by assembling several unite cells in which each unite cell consists of a rectangular frame as the base structure and a rack-and-pinion mechanism that is joined to the frame with a linear spring on both sides. In the second model with two DOF, a small mass is added while its center is attached to the center of the pinion on one side and the other side is connected to the rectangular frame via a linear spring. In the first mechanism, the pinion is considered as the single resonator, and in the 2DOF model, on the other hand, the pinion and small mass acted as multiple resonators. By obtaining the governing equations of motion for a single cell in each model, the dynamic behavior of two metastructures is thoroughly investigated. Therefore, the equations of motion for the two models are written in matrix form, and then, the dispersion relations are presented to analyze the influences of system parameters on the bandgaps’ starting/ending frequencies. Finally, two models are successfully compared and then numerically simulated via MATLAB-SIMULINK and MSC-ADAMS software. With the aid of closed-form expressions for starting/ending frequencies, the correlation between the system parameters and bandgap intervals can be readily recognized.","PeriodicalId":7382,"journal":{"name":"Advances in Condensed Matter Physics","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2021-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79452933","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Stress-Driven Evolution on Mismatched Ca2Co2O5 Oxide Material: From Geometry to the Electronic States 不匹配Ca2Co2O5氧化物材料的应力驱动演化:从几何到电子态

IF 1.5 4区物理与天体物理

Advances in Condensed Matter Physics Pub Date : 2021-05-11 DOI: 10.1155/2021/5538056

F. P. Zhang, Y. Sun, G. Zhang, X. Shi, G. Qin

{"title":"Stress-Driven Evolution on Mismatched Ca2Co2O5 Oxide Material: From Geometry to the Electronic States","authors":"F. P. Zhang, Y. Sun, G. Zhang, X. Shi, G. Qin","doi":"10.1155/2021/5538056","DOIUrl":"https://doi.org/10.1155/2021/5538056","url":null,"abstract":"The geometrical structures, phase stabilities, electron energy band structures, electron density of states, and atom recombination together with the electron conduction behaviors of the sandwiched Ca2Co2O5 with external stress of 1 GPa are intensively studied by the density functional theory method. The studying results show that the symmetry remains undisturbed; the strain to the stress response is anisotropic. The strain of microarchitecture induced by external stress is also anisotropic. There is stronger covalent binding between Co and O. The binding between Co and O within CdI2 like CoO2 is very much even covalent, and it is weakened under external stress. But the covalent Co-O binding within the rock salt like CaCoO layer is enhanced. The Ca-O binding strength is insensitive to external stress. An energy gap of 0.1 eV below Fermi level for the spin-up electron band disappears, and the two energy gaps are narrowed for the spin-down electron bands. The p orbital electrons form primarily the bands below Fermi level and the d orbital electrons form primarily the bands above Fermi level. The transitions from p orbital electrons to d orbital electrons produce the conduction. The CdI2 like CoO2 layer has been enhanced in terms of participating in the conduction properties with external stress of 1 GPa, and the capability of Co is enhanced while the capability of O is decreased.","PeriodicalId":7382,"journal":{"name":"Advances in Condensed Matter Physics","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2021-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77010388","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Molecular Dynamics Simulation of the Coalescence and Melting Process of Cu and Ag Nanoparticles Cu和Ag纳米颗粒聚结和熔化过程的分子动力学模拟

IF 1.5 4区物理与天体物理

Advances in Condensed Matter Physics Pub Date : 2021-04-29 DOI: 10.1155/2021/9945723

Huiting Guo, Linfu Zhang, Q. Zhu, Chuanjie Wang, Gang Chen, Peng Zhang

引用次数: 0

Micropyramid Vertical Ultraviolet GaN/AlGaN Multiple Quantum Wells LEDs on Si(111) Si上的微金字塔垂直紫外GaN/AlGaN多量子阱led (111)

IF 1.5 4区物理与天体物理

Advances in Condensed Matter Physics Pub Date : 2021-04-28 DOI: 10.1155/2021/9990673

Yuebo Liu, Honghui Liu, Hang Yang, Wanqing Yao, Fengge Wang, Yuan Ren, Junyu Shen, Minjie Zhang, Zhisheng Wu, Yang Liu, Baijun Zhang

引用次数: 0

Microwave Vitrification of Uranium Tailings: Microstructure and Mechanical Property 铀尾矿的微波玻璃化:微观结构和力学性能

IF 1.5 4区物理与天体物理

Advances in Condensed Matter Physics Pub Date : 2021-04-19 DOI: 10.1155/2021/5544835

Wei Wei, Keyou Shi, Yupeng Xie, Shoufu Yu, Jiawei Li, Min Chen, Zengmin Tang, A. Zhu, Qiucai Zhang, Yong Liu

{"title":"Microwave Vitrification of Uranium Tailings: Microstructure and Mechanical Property","authors":"Wei Wei, Keyou Shi, Yupeng Xie, Shoufu Yu, Jiawei Li, Min Chen, Zengmin Tang, A. Zhu, Qiucai Zhang, Yong Liu","doi":"10.1155/2021/5544835","DOIUrl":"https://doi.org/10.1155/2021/5544835","url":null,"abstract":"In this work, the dense glass matrix of uranium tailings was successfully fabricated via microwave sintering process with Na2CO3 as a sintering aid. The effects of Na2CO3 additive and sintering temperature on the microstructure and mechanical properties of as-prepared solids were systematically investigated. XRD results confirmed the vitrified forms can be achieved at 1200°C within 30 min with 20 wt.% Na2CO3 addition. Importantly, the Na2CO3 additive significantly reduced the firing temperature from 1500°C to 1200°C and promoted densification. FT-IR analysis demonstrated that the main characteristic peaks of the sintered samples were attributed to the vibration of Si-O-Si. Microstructural studies presented the homogeneous distribution of glass phases. The results of mechanical properties of the sintered forms show that bulk density and Vickers hardness increased with increasing Na2CO3 content as well as sintering temperature, and the highest bulk density (2.45 ± 0.01 g/cm3) and Vickers hardness (823 ± 25 HV) were obtained at the temperature of 1300°C with 20 wt.% Na2CO3 addition, the heating rate of 20°C/min, and the soaking time of 30 min. It implied that the combination of microwave sintering with the appropriate addition of Na2CO3 would provide an efficient method for the immobilization of radionuclides in uranium tailings.","PeriodicalId":7382,"journal":{"name":"Advances in Condensed Matter Physics","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2021-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88765077","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Tuning Electronic Properties of GaSe/Silicane Van der Waals Heterostructure by External Electric Field and Strain: A First-Principle Study 利用外电场和应变调谐GaSe/硅烷范德华异质结构的电子性质:第一性原理研究

IF 1.5 4区物理与天体物理

Advances in Condensed Matter Physics Pub Date : 2021-03-10 DOI: 10.1155/2021/5514897

Gang Xu, H. Lei

引用次数: 1

Enhancement in Optical Properties of Lanthanum-Doped Manganese Barium Hexaferrites under Different Substitutions 不同取代对镧掺杂锰钡六铁体光学性能的增强

IF 1.5 4区物理与天体物理

Advances in Condensed Matter Physics Pub Date : 2021-03-06 DOI: 10.1155/2021/8849595

M. Alzaid

引用次数: 7

First-Principles Study of Structure, Elastic Properties, and Thermal Conductivity of Monolayer Calcium Hydrobromide 单层氢溴化钙的结构、弹性和导热性的第一性原理研究

IF 1.5 4区物理与天体物理

Advances in Condensed Matter Physics Pub Date : 2021-02-17 DOI: 10.1155/2021/6619252

Sirui Li, Cui-E. Hu, Xiao-Lu Wang, Yan Cheng

{"title":"First-Principles Study of Structure, Elastic Properties, and Thermal Conductivity of Monolayer Calcium Hydrobromide","authors":"Sirui Li, Cui-E. Hu, Xiao-Lu Wang, Yan Cheng","doi":"10.1155/2021/6619252","DOIUrl":"https://doi.org/10.1155/2021/6619252","url":null,"abstract":"In recent years, some laboratories have been able to prepare calcium hydrobromide (CaHBr) by melting hydride and anhydrous bromide or metal and bromide in a hydrogen atmosphere at 900°C and have studied some of its properties. But there are few theoretical studies, especially the theoretical studies of monolayer CaHBr. We use the first-principles method to calculate the structure, elastic properties, and lattice thermal conductivity of the monolayer CaHBr based on the Boltzmann transport equation. We obtain a stable crystal structure by the optimization of monolayer CaHBr. By calculating the elastic constant of monolayer CaHBr, its mechanical stability is proved, and the elastic limit of monolayer CaHBr is obtained by biaxial tensile strain on monolayer CaHBr. And the corresponding phonon spectra show no imaginary frequency, indicating the dynamic stability of the monolayer CaHBr. By the ShengBTE code, we calculate the lattice thermal conductivity of the monolayer CaHBr, the iterative solution of BTE and RTA at 300 K–1200 K is obtained, and the lattice thermal conductivity at room temperature is κBTE ι � 2.469W/m · K and κRTA ι � 2.201W/m · K, respectively. It can be seen that the lattice thermal conductivity of monolayer CaHBr is low. And by analyzing the phonon spectrum, the scattering rate, and the mean free path of the phonons, the lattice thermal conductivity of monolayer CaHBrmainly depends on the acoustic modes.We hope this study can provide theoretical guidance for the experiments and practical application of monolayer CaHBr.","PeriodicalId":7382,"journal":{"name":"Advances in Condensed Matter Physics","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2021-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84779644","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1