Communications Materials最新文献

Magnetic domain walls interacting with dislocations in micromagnetic simulations 微磁模拟中与位错相互作用的磁畴壁

IF 7.5

Communications Materials Pub Date : 2024-11-21 DOI: 10.1038/s43246-024-00697-9

Sami Kaappa, Suvi Santa-aho, Mari Honkanen, Minnamari Vippola, Lasse Laurson

{"title":"Magnetic domain walls interacting with dislocations in micromagnetic simulations","authors":"Sami Kaappa, Suvi Santa-aho, Mari Honkanen, Minnamari Vippola, Lasse Laurson","doi":"10.1038/s43246-024-00697-9","DOIUrl":"10.1038/s43246-024-00697-9","url":null,"abstract":"Defects, impurities, and embedded particles in ferromagnetic materials are long known to be responsible for the Barkhausen effect due to the jerky field-driven motion of domain walls and have more recently been shown to play a role also in domain wall dynamics in nanoscale ferromagnetic structures used in spintronics devices. Simulating the magnetic domain wall dynamics in the micromagnetic framework offers a straightforward route to study such systems and phenomena. However, the related work in the past suffers from material imperfections being introduced without proper physical foundation. Here, we implement dislocation stress fields in micromagnetic simulations through the induced anisotropy fields by inverse magnetostriction. The effects of individual dislocations on domain wall dynamics in thin films of different Fe surface lattice planes are characterized numerically. As a demonstration of the applicability of the implementation, we consider disorder fields due to randomly positioned dislocations with different densities, and study the avalanche-like transient approach towards the depinning transition of a domain wall driven by a slowly increasing external magnetic field. Simulating the magnetic domain wall dynamics in ferromagnetic materials is crucial for designing spintronics devices, but including material imperfections is often challenging. Here, the effects of individual dislocations on domain wall dynamics in thin films of iron is investigated by micromagnetic simulations.","PeriodicalId":10589,"journal":{"name":"Communications Materials","volume":" ","pages":"1-11"},"PeriodicalIF":7.5,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s43246-024-00697-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142679983","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hypercrosslinked polymer membranes via interfacial polymerization for organic dye separations 用于有机染料分离的界面聚合超交联聚合物膜

IF 7.5

Communications Materials Pub Date : 2024-11-20 DOI: 10.1038/s43246-024-00668-0

Qingyin Li, Shuqing Li, Caimei Yu, Zhen Zhan, Guang Cheng, Bien Tan, Shijie Ren

{"title":"Hypercrosslinked polymer membranes via interfacial polymerization for organic dye separations","authors":"Qingyin Li, Shuqing Li, Caimei Yu, Zhen Zhan, Guang Cheng, Bien Tan, Shijie Ren","doi":"10.1038/s43246-024-00668-0","DOIUrl":"10.1038/s43246-024-00668-0","url":null,"abstract":"Hypercrosslinked polymers (HCPs) have gained attention as promising materials for separation membranes due to their abundant porosity, low cost, ease of preparation, and excellent stability. Here, we demonstrate an interfacial-assisted polymerization approach to prepare continuous HCP membranes at room temperature. The method demonstrates versatility in constructing HCP membranes using various precursors, including small molecules and polymers. Specifically, the HCP membranes prepared using benzene as the monomer exhibit controllable thickness and a remarkable Brunauer-Emmett-Teller surface area of up to 855 m2 g−1. Leveraging physical size sieving and electrostatic interaction, the fabricated benzene-based membranes effectively reject small anionic dye molecules, such as Congo Red, Acid Fuchsin, and Methyl Orange, achieving rejection rates exceeding 93% while maintaining a high-water flux of up to 55 L m−2 h−1 bar−1. This study shows a versatile approach for the design of HCP membranes capable of efficiently separating mixtures containing small molecules. Hypercrosslinked polymers are promising materials for separation membranes due to their low cost and high porosity. Here, continuous hypercrosslinked polymer membranes are prepared using interfacial polymerization that effectively rejects small dye molecules with high water flux.","PeriodicalId":10589,"journal":{"name":"Communications Materials","volume":" ","pages":"1-9"},"PeriodicalIF":7.5,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s43246-024-00668-0.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142679934","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ideal spin-orbit-free Dirac semimetal and diverse topological transitions in Y8CoIn3 family Y8CoIn3 族中的理想无自旋轨道狄拉克半金属和多种拓扑转变

IF 7.5

Communications Materials Pub Date : 2024-11-15 DOI: 10.1038/s43246-024-00635-9

Manabu Sato, Juba Bouaziz, Shuntaro Sumita, Shingo Kobayashi, Ikuma Tateishi, Stefan Blügel, Akira Furusaki, Motoaki Hirayama

{"title":"Ideal spin-orbit-free Dirac semimetal and diverse topological transitions in Y8CoIn3 family","authors":"Manabu Sato, Juba Bouaziz, Shuntaro Sumita, Shingo Kobayashi, Ikuma Tateishi, Stefan Blügel, Akira Furusaki, Motoaki Hirayama","doi":"10.1038/s43246-024-00635-9","DOIUrl":"10.1038/s43246-024-00635-9","url":null,"abstract":"Topological semimetals, known for their intriguing properties arising from band degeneracies, have garnered significant attention. However, the discovery of a material realization and the detailed characterization of spinless Dirac semimetals have not yet been accomplished. Here, we propose from first-principles calculations that the RE8CoX3 group (RE = rare earth elements, X = Al, Ga, or In) contains ideal spinless Dirac semimetals whose Fermi surfaces are fourfold degenerate band-crossing points (without including spin degeneracy). Despite the lack of space inversion symmetry in these materials, Dirac points are formed on the rotation-symmetry axis due to accidental degeneracies of two bands corresponding to different 2-dimensional irreducible representations of the C6v group. We also investigate, through first-principles calculations and effective model analysis, various phase transitions caused by lattice distortion or elemental substitutions from the Dirac semimetal phase to distinct topological semimetallic phases such as nonmagnetic linked-nodal-line and Weyl semimetals (characterized by the second Stiefel–Whitney class) and ferromagnetic Weyl semimetals. Band degeneracies at the Fermi level in topological semimetals are sources of intriguing interference effects between electronic states around the degeneracy points. Here, the RE8CoX3 compounds, with RE = rare-earth and X = Al, Ga, or In, are proposed as realizations of ideal spinless Dirac semimetals hosting the fourfold degenerate band-crossing points without the spin degrees of freedom.","PeriodicalId":10589,"journal":{"name":"Communications Materials","volume":" ","pages":"1-10"},"PeriodicalIF":7.5,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s43246-024-00635-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142645746","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design of highly responsive chemiresistor-based sensors by interfacing NiPc with graphene 通过将 NiPc 与石墨烯连接，设计基于化学电阻器的高响应传感器

IF 7.5

Communications Materials Pub Date : 2024-11-15 DOI: 10.1038/s43246-024-00693-z

Daniele Perilli, Sonia Freddi, Michele Zanotti, Giovanni Drera, Andrea Casotto, Stefania Pagliara, Luca Schio, Luigi Sangaletti, Cristiana Di Valentin

{"title":"Design of highly responsive chemiresistor-based sensors by interfacing NiPc with graphene","authors":"Daniele Perilli, Sonia Freddi, Michele Zanotti, Giovanni Drera, Andrea Casotto, Stefania Pagliara, Luca Schio, Luigi Sangaletti, Cristiana Di Valentin","doi":"10.1038/s43246-024-00693-z","DOIUrl":"10.1038/s43246-024-00693-z","url":null,"abstract":"Highly sensitive and selective gas-sensing materials are critical for applications ranging from environmental monitoring to breath analysis. A rational approach at the nanoscale is urgent to design next-generation sensing devices. In previous work, we unveiled interesting charge transfer channels at the interface between p-type doped graphene and a layer of nickel phthalocyanine (NiPc) molecules, which we believe could be successfully exploited in gas sensing devices. Here, we have investigated the graphene-NiPc interface’s response to adsorbed gas molecules via first-principles calculations. We focused on NH3 and NO2 as test molecules, representing electron donors and acceptors, respectively. Notably, we identified the Ni dz2 orbital as a key player in mediating the charge transfer and affecting the charge carrier density in graphene. As a proof-of-concept, we then prepared the graphene-NiPc system as a chemiresistor device and exposed it to NH3 and NO2 at room temperature. The sensing tests revealed excellent sensitivity and selectivity, along with a rapid recovery time and a remarkably low detection limit. Highly sensitive and selective gas-sensing materials are important for applications ranging from environmental monitoring to breath analysis. Here, the gas sensing response of the heterointerface between graphene and nickel phthalocyanine is investigated by first-principles calculations and tested in a chemiresistor device exposed to NH3 and NO2 at room temperature.","PeriodicalId":10589,"journal":{"name":"Communications Materials","volume":" ","pages":"1-13"},"PeriodicalIF":7.5,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s43246-024-00693-z.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142645792","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Rapid and precise large area mapping of rare-earth doping homogeneity in luminescent materials 发光材料中稀土掺杂均匀性的快速精确大面积绘图

IF 7.5

Communications Materials Pub Date : 2024-11-14 DOI: 10.1038/s43246-024-00679-x

Jan Hrabovsky, Miroslav Kucera, Lucie Palousova, Jakub Zazvorka, Jan Kubat, Lei Bi, Martin Veis

{"title":"Rapid and precise large area mapping of rare-earth doping homogeneity in luminescent materials","authors":"Jan Hrabovsky, Miroslav Kucera, Lucie Palousova, Jakub Zazvorka, Jan Kubat, Lei Bi, Martin Veis","doi":"10.1038/s43246-024-00679-x","DOIUrl":"10.1038/s43246-024-00679-x","url":null,"abstract":"Doping of luminescent materials by rare-earth ions is common practice to achieve desired emission properties for a large variety of applications. As several rare-earths ions are frequently combined, it is subsequently difficult to effectively detect and control their homogeneous distribution within the host material. Here, we present a simple, rapid, large scale and precise method of rare-earth mapping using a commercial UV-Vis scanner. We discuss the influence of rare-earth distribution on the physical, optical and luminescent properties with no observable qualitative effect on photoluminescent properties and optical anisotropy. On the contrary, rare-earth-rich areas exhibit significantly higher values of refractive index and optical absorption, which allowed for their identification by the commercial scanner device. The presented method thus provides fast and accurate information about the rare-earth distribution in the material volume with high resolution (≈2.7 µm) and low limit of concentration difference detection (≈0.014 at.%) compared to other techniques, which makes it a promising candidate for high throughput measurements. Mapping the distributions of various rare-earth dopants when combined within a host material is challenging, Here, a fast and precise approach to mapping rare-earth doping distribution based on a commercial UV-Vis scanner shows that dopants locally modify the optical properties of the material.","PeriodicalId":10589,"journal":{"name":"Communications Materials","volume":" ","pages":"1-9"},"PeriodicalIF":7.5,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s43246-024-00679-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142645811","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Machine vision system by optically tunable 2D magnetic junctions 利用光可调二维磁性结的机器视觉系统

IF 7.5

Communications Materials Pub Date : 2024-11-14 DOI: 10.1038/s43246-024-00696-w

Aldo Isidori

引用次数: 0

Unraveling the origin of conductivity change in Co-doped FeRh phase transition 揭示掺杂 Co 的 FeRh 相变中电导率变化的起源

IF 7.5

Communications Materials Pub Date : 2024-11-11 DOI: 10.1038/s43246-024-00694-y

Ji-Ho Park, Min Tae Park, Geon-Woo Baek, Shin-ichi Kimura, Myung-Hwa Jung, Kab-Jin Kim

{"title":"Unraveling the origin of conductivity change in Co-doped FeRh phase transition","authors":"Ji-Ho Park, Min Tae Park, Geon-Woo Baek, Shin-ichi Kimura, Myung-Hwa Jung, Kab-Jin Kim","doi":"10.1038/s43246-024-00694-y","DOIUrl":"10.1038/s43246-024-00694-y","url":null,"abstract":"Phase-changing materials have been a cornerstone of condensed matter physics for decades. A quintessential example is iron-rhodium (FeRh), which undergoes a first-order phase transition from antiferromagnetic to ferromagnetic states near room temperature. The pivotal aspect of this transition is a marked alteration in electrical conductivity. However, its underlying origin still remains elusive, largely due to the difficulties of directly probing fundamental transport during this phase transition. In this study, we investigate the fundamentals of FeRh’s electrical transport employing terahertz time-domain spectroscopy (THz-TDS). Leveraging the Drude model, we discerned the distinct contributions of extrinsic (momentum scattering time, τ) and intrinsic (charge density, n, and effective mass, m*) factors to electrical conductivity independently. Notably, our investigation unveiled a sharp alteration in n and m* during the phase transition, contrasting with the gradual monotonic decrease of τ with rising temperature. Consequently, our findings provide compelling evidence that the conductivity change in FeRh during the phase transition originates from a restructuring of its band structure. This work provides a crucial step towards a comprehensive understanding of the electrical transport changes occurring during the phase transition, offering valuable insights into the behaviour of phase changing materials. Phase-changing materials such as FeRh, undergoing a first-order phase transition from antiferromagnetic to ferromagnetic near room temperature, are attractive for various applications. Here, terahertz time-domain spectroscopy provides evidence that the conductivity change in FeRh during the phase transition originates from a restructuring of its band structure.","PeriodicalId":10589,"journal":{"name":"Communications Materials","volume":" ","pages":"1-7"},"PeriodicalIF":7.5,"publicationDate":"2024-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s43246-024-00694-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142600822","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Author Correction: Electrical response and biodegradation of Sepia melanin-shellac films printed on paper 作者更正：印在纸上的墨鱼黑素-黄柏薄膜的电反应和生物降解

IF 7.5

Communications Materials Pub Date : 2024-11-11 DOI: 10.1038/s43246-024-00687-x

Anthony Camus, Shinhyeong Choe, Camille Bour-Cardinal, Joaquin Isasmendi, Yongjun Cho, Youngju Kim, Cristian Vlad Irimia, Cigdem Yumusak, Mihai Irimia-Vladu, Denis Rho, Jaewook Myung, Clara Santato

引用次数: 0

Multi-sensing yarns for continuous wireless sweat lactate monitoring 用于连续无线汗液乳酸监测的多传感纱线

IF 7.5

Communications Materials Pub Date : 2024-11-08 DOI: 10.1038/s43246-024-00680-4

Bradley Napier, Giusy Matzeu, Fiorenzo G. Omenetto

{"title":"Multi-sensing yarns for continuous wireless sweat lactate monitoring","authors":"Bradley Napier, Giusy Matzeu, Fiorenzo G. Omenetto","doi":"10.1038/s43246-024-00680-4","DOIUrl":"10.1038/s43246-024-00680-4","url":null,"abstract":"Textile integrated sensors based on conductive, electrochemically active microfibers can enable inexpensive, nearly invisible distributed sensing of sweat in clothing. Reduced graphene oxide fibers are mechanically robust, conductive, and can be easily functionalized to form a variety of sensors with properties comparable to planar fabricated sensors, given their ability to work both as electrical interconnections and as a base electrode. Here, we present an electrochemical yarn based on modified dry-spun reduced graphene oxide fibers. This braided format contains reference, counter electrode, a lactate-responsive fiber functionalized with lactate oxidase, and a pH-sensing fiber for calibration in a single, robust, weavable format. This electrochemical yarn was integrated into a demonstrator wearable textile-patch capable of continuous data collection and wireless data transmitted to an ad-hoc app. The yarns perform comparably to traditional probes in a format of broad utility for standalone or integrated monitoring of physiological parameters. Textile-based sweat sensors offer the possibility of low-cost health monitoring. Here, an electrochemical yarn based on reduced-graphene oxide is integrated into a textile patch that continuously collects physiological data and wirelessly sends it to an app.","PeriodicalId":10589,"journal":{"name":"Communications Materials","volume":" ","pages":"1-8"},"PeriodicalIF":7.5,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s43246-024-00680-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142595727","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Benefits and complexity of defects in metal-organic frameworks 金属有机框架缺陷的益处和复杂性

IF 7.5

Communications Materials Pub Date : 2024-11-08 DOI: 10.1038/s43246-024-00691-1

N. S. Portillo-Vélez, Juan L. Obeso, José Antonio de los Reyes, Ricardo A. Peralta, Ilich A. Ibarra, Michael T. Huxley

引用次数: 0