Science China Materials最新文献

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Multifunctional ionic liquid to extend the expiration date of precursor solution for perovskite photovoltaics 延长过氧化物光伏前驱体溶液有效期的多功能离子液体
IF 8.1 2区 材料科学
Science China Materials Pub Date : 2024-08-23 DOI: 10.1007/s40843-024-3071-8
Yazhou Xu, Kaiqin Xu, Shuqin Xiao, Zhi Xing, Dengxue Li, Zongcai Li, Xiaotian Hu, Yiwang Chen, Ting Hu
{"title":"Multifunctional ionic liquid to extend the expiration date of precursor solution for perovskite photovoltaics","authors":"Yazhou Xu, Kaiqin Xu, Shuqin Xiao, Zhi Xing, Dengxue Li, Zongcai Li, Xiaotian Hu, Yiwang Chen, Ting Hu","doi":"10.1007/s40843-024-3071-8","DOIUrl":"https://doi.org/10.1007/s40843-024-3071-8","url":null,"abstract":"<p>At present, the development of perovskite solar cells (PSCs) is progressing rapidly, but the issue of poor stability remains a significant challenge. Achieving a stable precursor solution is crucial for the large-scale production of high-quality PSC films. In this study, we successfully developed a strategy to improve the long-term stability of the precursor solution and improve device performance by employing 1-<i>n</i>-butyl-3-methylimidazolium di-<i>n</i>-butyl phosphate (BMIMBP) as an anti-aging additive. The BP<sup>−</sup> component inhibits the reactivity of I<sup>−</sup> and formamidinium ion through multiple chemical bonds, thereby stabilizing the precursor solution. In addition, the BMIM<sup>+</sup> component, which contains an amino group, can form two-dimensional perovskite internally, further enhancing the device stability. This strategy provides valuable guidance for achieving long-term stability in solar cells.</p>","PeriodicalId":773,"journal":{"name":"Science China Materials","volume":null,"pages":null},"PeriodicalIF":8.1,"publicationDate":"2024-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142208965","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Efficient oxygen reduction through metal-free 3D covalent organic frameworks: a novel approach 通过无金属三维共价有机框架实现高效氧还原:一种新方法
IF 8.1 2区 材料科学
Science China Materials Pub Date : 2024-08-23 DOI: 10.1007/s40843-024-3039-8
Shanyue Wei, Xiaowei Wu, Shufei Zhu, Zhiyang Wang, Jiangli Wang, Can-Zhong Lu, Yiming Xie
{"title":"Efficient oxygen reduction through metal-free 3D covalent organic frameworks: a novel approach","authors":"Shanyue Wei, Xiaowei Wu, Shufei Zhu, Zhiyang Wang, Jiangli Wang, Can-Zhong Lu, Yiming Xie","doi":"10.1007/s40843-024-3039-8","DOIUrl":"https://doi.org/10.1007/s40843-024-3039-8","url":null,"abstract":"<p>Covalent organic framework (COF) materials have gained significant applications in electrocatalytic systems due to their structural diversity and tunable functionalities. Moreover, three-dimensional (3D) COFs exhibit multistage pore structures, exposing numerous open sites, which facilitate the oxygen reduction reaction (ORR) process. However, the advancement of 3D COFs for ORR has been hindered by challenges, including limited topologies, the scarcity of building blocks with the required reactivity and symmetries, and difficulties in determining crystalline structures. In this work, we utilized an 8-connectivity building unit and successfully constructed two isoreticular 3D COF materials, which exhibited exceptionally high catalytic activity for 2e<sup>−</sup> oxygen reduction reaction without the addition of any metal or conductive support materials, nor the pyrolyzed process. The electrochemically active surface areas (ECSAs) of the two 3D COFs were found to be 17.19 and 12.18 mF/cm<sup>2</sup>, respectively, which were significantly higher than those reported from other framework materials.</p>","PeriodicalId":773,"journal":{"name":"Science China Materials","volume":null,"pages":null},"PeriodicalIF":8.1,"publicationDate":"2024-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142208973","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Providing insight into exchange coupling within nanomagnetism: mechanism, micromagnetic simulation, synthesis and biomedical application 深入了解纳米磁性中的交换耦合:机制、微磁模拟、合成和生物医学应用
IF 8.1 2区 材料科学
Science China Materials Pub Date : 2024-08-22 DOI: 10.1007/s40843-024-2978-8
Yuting Tang, Feng Feng, Guanhua Xu, Shijie Qin, Xiaoping Ouyang, Li Yao, Xiuyu Wang
{"title":"Providing insight into exchange coupling within nanomagnetism: mechanism, micromagnetic simulation, synthesis and biomedical application","authors":"Yuting Tang, Feng Feng, Guanhua Xu, Shijie Qin, Xiaoping Ouyang, Li Yao, Xiuyu Wang","doi":"10.1007/s40843-024-2978-8","DOIUrl":"https://doi.org/10.1007/s40843-024-2978-8","url":null,"abstract":"<p>Exchange coupling within nanomagnetism is a rapidly evolving field with significant implications for that plays a crucial role in the development of magnetic nanomaterials. Manipulating exchange coupling interaction enables the magnetic systems to overcome limitations associated with size-dependent magnetic behavior within nano scale, thereby improving their magnetic properties and providing for superior performance in biomedical applications compared with single-phase magnetic materials. Understanding the underlying mechanism of exchange coupling and its impact on macroscopic magnetic properties is crucial for the design and application of such magnetic materials. This review provides an overview of recent advances in interfacial exchange coupling among different magnetic modalities—ferromagnetism, ferrimagnetism, and antiferromagnetism—based on core-shell magnetic nanoparticles (MNPs). Additionally, this review discusses micromagnetic simulations to gain insights into the relationship between the microscopic magnetic structure (size, shape, composition, and exchange coupling) and the resulting macroscopic properties. The controlled synthesis of MNPs is summarized, including one-step method and two-step method. The precise manipulation of interfacial characteristics is of great importance, albeit challenging, as it allows for the fine-tuning of magnetic properties tailored for specific applications. The review also explores potential applications of core-shell MNPs in magnetic resonance imaging, hyperthermia therapy, targeted drug delivery, and advanced neuromodulation.\u0000</p>","PeriodicalId":773,"journal":{"name":"Science China Materials","volume":null,"pages":null},"PeriodicalIF":8.1,"publicationDate":"2024-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142208967","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Balancing sensitivity and resolution by feedback regulation of free radicals from Sn-C bonds in tin-oxygen clusters EBL photoresist 通过对锡氧簇 EBL 光刻胶中 Sn-C 键自由基的反馈调节平衡灵敏度和分辨率
IF 8.1 2区 材料科学
Science China Materials Pub Date : 2024-08-22 DOI: 10.1007/s40843-024-3062-y
Hao Chen, Xinyan Huang, Yingdong Zhao, Jun Zhao, Pengzhong Chen, Xiaojun Peng
{"title":"Balancing sensitivity and resolution by feedback regulation of free radicals from Sn-C bonds in tin-oxygen clusters EBL photoresist","authors":"Hao Chen, Xinyan Huang, Yingdong Zhao, Jun Zhao, Pengzhong Chen, Xiaojun Peng","doi":"10.1007/s40843-024-3062-y","DOIUrl":"https://doi.org/10.1007/s40843-024-3062-y","url":null,"abstract":"<p>Notably, the cleavage of Sn–C bonds in extreme-ultraviolet photoresists containing Sn-oxygen (oxo) clusters and the generation of free radicals upon exposure lead to the chemical linking of Sn-oxo cores and subsequent solubility shifts. The reactivities and migration patterns of the generated radicals substantially influence patterning outcomes, including sensitivity and resolution. Herein, two Snoxo clusters, Sn<sub>4</sub>-Me-C<sub>10</sub> (with Sn–methyl) and Sn<sub>4</sub>-Bu-C<sub>10</sub> (with Sn–butyl), were combined to balance the sensitivity and resolution of photoresists, leveraging the feedback regulation between methyl and butyl free radicals generated from Sn–C bond cleavage. During electron beam lithography exposure, sensitive butyl radicals produced by Sn<sub>4</sub>-Bu-C<sub>10</sub> initiated reactions within Sn<sub>4</sub>-Me-C<sub>10</sub>, improving sensitivity. Subsequently, the unstable methyl and bulky adamantyl radicals generated by Sn<sub>4</sub>-Me-C<sub>10</sub> quenched the excess butyl radicals, thus improving the resolution and exposure latitude. Thus, this method leveraging the feedback regulation of free radicals offers new insights into the design of sensitive metal oxide resists with enhanced resolution.\u0000</p>","PeriodicalId":773,"journal":{"name":"Science China Materials","volume":null,"pages":null},"PeriodicalIF":8.1,"publicationDate":"2024-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142208964","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Quantitative evaluation of various NIR-to-red upconversion mechanisms in NaYF4:20%Yb3+,2%Er3+ nanoparticles 对 NaYF4:20%Yb3+,2%Er3+ 纳米粒子中各种近红外-红外上转换机制的定量评估
IF 8.1 2区 材料科学
Science China Materials Pub Date : 2024-08-22 DOI: 10.1007/s40843-024-3022-y
Hao Wu, Lin Yang, Liangliang Zhang, Huajun Wu, Guohui Pan, Yongshi Luo, Ligong Zhang, Feng Liu, Jiahua Zhang
{"title":"Quantitative evaluation of various NIR-to-red upconversion mechanisms in NaYF4:20%Yb3+,2%Er3+ nanoparticles","authors":"Hao Wu, Lin Yang, Liangliang Zhang, Huajun Wu, Guohui Pan, Yongshi Luo, Ligong Zhang, Feng Liu, Jiahua Zhang","doi":"10.1007/s40843-024-3022-y","DOIUrl":"https://doi.org/10.1007/s40843-024-3022-y","url":null,"abstract":"<p>In the most popular NaYF<sub>4</sub>:Yb/Er upconversion nanoparticles (UCNPs), the red emission is attributed to four potential excitation routes encompassing two- and three-photon excitation processes. Consequently, this red emission typically exhibits a super-quadratic dependency on near-infrared (NIR) excitation intensity, with the nonlinear order <i>n</i> being dependent on the individual contributions (<i>C</i><sub>i</sub>s) of these four excitation routes. Notably, the <i>C</i><sub>i</sub>s values are not constant but significantly impacted by the surface quenching of the UCNPs, leading to a decrease in the <i>n</i> value. However, a quantitative assessment of these variable <i>C</i><sub>i</sub>s has not been undertaken, hindering a comprehensive understanding of the quenching effect on the UC mechanisms. In this work, we prepare four NaYF<sub>4</sub>:Yb/Er nanocrystal samples with varying degrees of surface quenching, achieving through the modulation of particle size and core-shell structure. We quantitatively evaluate the <i>C</i><sub>i</sub>s values and identify the primary excitation route responsible for the red emission. Our results reveal that the contribution of three-photon excitation increases from 7% in the 30 nm bare core to 74% in 90 nm core with shell at an excitation intensity of 200 mW cm<sup>−2</sup>. This observation high-lights the impact of surface quenching suppression. Furthermore, we discover that the quenching effect operates by reducing the lifetimes of the Yb<sup>3+</sup><sup>2</sup>F<sub>5/2</sub> and Er<sup>3+</sup><sup>4</sup>S<sub>3/2</sub> levels, while enhancing the NIR emission intensity ratio of the Er<sup>3+</sup><sup>4</sup>I<sub>13/2</sub> → <sup>4</sup>I<sub>15/2</sub> transition to the Yb<sup>3+</sup><sup>2</sup>F<sub>5/2</sub> → <sup>2</sup>F<sub>7/2</sub> transition. Our findings provide physical insights into the excitation mechanisms underlying the red UC emission in NaYF<sub>4</sub>:Yb/Er UCNPs.</p>","PeriodicalId":773,"journal":{"name":"Science China Materials","volume":null,"pages":null},"PeriodicalIF":8.1,"publicationDate":"2024-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142208962","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Aggregation-caused quenching to crystallization-induced emission transformation: hydration-induced luminescence in crystal curcumin with tunable thermochromism for in vivo tracking 聚合引起的淬火到结晶诱导的发射转变:具有可调热致变色的姜黄素晶体中的水合诱导发光,用于体内追踪
IF 8.1 2区 材料科学
Science China Materials Pub Date : 2024-08-22 DOI: 10.1007/s40843-024-3049-1
Huan Shen, Peng Shi, Ergang Liu, Yuefei Fang, Shijie Xu, Junbo Gong, Yongzhuo Huang
{"title":"Aggregation-caused quenching to crystallization-induced emission transformation: hydration-induced luminescence in crystal curcumin with tunable thermochromism for in vivo tracking","authors":"Huan Shen, Peng Shi, Ergang Liu, Yuefei Fang, Shijie Xu, Junbo Gong, Yongzhuo Huang","doi":"10.1007/s40843-024-3049-1","DOIUrl":"https://doi.org/10.1007/s40843-024-3049-1","url":null,"abstract":"<p>The development of solid-state materials with switchable luminescence in response to stimuli remains a challenge, especially for organic materials. While crystal water significantly impacts the absorption spectra of organic crystals, it is unclear whether the emission spectra of organic luminescent materials can be systematically manipulated by water. In this study, we successfully obtained curcumin monohydrate (Form X), a channel-type hydrate exhibiting crystallization-induced emission (CIE) at 608 nm (orange fluorescence), which contrasted with the conventional forms of aggregation-caused quenching (ACQ). Thermal treatment induced the release of hydration water, resulting in a new anhydrate (Form IV) that emitted yellow-green fluorescence with the emission peak at 575 nm. Additionally, this approach can be used to track the absorption of curcumin crystals following subcutaneous or intramuscular delivery. The hydratemediated single-crystal-to-single-crystal transition (SCSC) and its associated luminescence transition were reversible and responsive to temperature, offering a green approach for synthesizing and designing aggregation-induced-emission (AIE)-based intelligent luminescent devices for detecting air humidity or drug absorption.</p>","PeriodicalId":773,"journal":{"name":"Science China Materials","volume":null,"pages":null},"PeriodicalIF":8.1,"publicationDate":"2024-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142208954","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Enhanced thermal constant B of diamond films for ultrahigh sensitivity negative temperature coefficient thermistors 用于超高灵敏度负温度系数热敏电阻的增强型金刚石薄膜热常数 B
IF 8.1 2区 材料科学
Science China Materials Pub Date : 2024-08-22 DOI: 10.1007/s40843-024-3053-4
Qiao Chen, Yimeng Zhao, Jiawei Li, Xiyuan Liu, Xinyue Wang, Wenxi Zhang, Hongwei Zhu
{"title":"Enhanced thermal constant B of diamond films for ultrahigh sensitivity negative temperature coefficient thermistors","authors":"Qiao Chen, Yimeng Zhao, Jiawei Li, Xiyuan Liu, Xinyue Wang, Wenxi Zhang, Hongwei Zhu","doi":"10.1007/s40843-024-3053-4","DOIUrl":"https://doi.org/10.1007/s40843-024-3053-4","url":null,"abstract":"<p>Negative temperature coefficient (NTC) thermistor plays a crucial role in science research and engineering applications for precise temperature monitoring. Although great progress has been achieved in NTC materials, enhancing sensitivity and maintaining this high sensitivity along with linearity across extensive temperature ranges remain a significant challenge. In this study, we introduce a diamond-based thermistor (DT) characterized by its outstanding sensitivity, swift response time, and broad temperature monitoring capabilities. The temperature constant <i>B</i> for this DT, measured from 30 to 300°C (<i>B</i><sub>30/300</sub>), achieves an exceptional value of 8012 K, which notably exceeds the temperature sensing capabilities of previously reported NTC thermistors within this extensive range. Moreover, diamond’s unique thermal conductivity and stability significantly boost the response speed and durability of the DT, offering substantial advantages over traditional ceramic thermistors. The enhanced temperature-sensitive properties of the DT are attributed to the presence of impurity elements in polycrystalline diamond. Impedance analysis indicates a hopping conduction mechanism, likely involving C-H or C-N dipoles at the diamond grain boundaries. This study marks a significant leap forward in diamond thermistor technology and sheds light on the mechanisms of thermal active conduction in diamond materials.</p>","PeriodicalId":773,"journal":{"name":"Science China Materials","volume":null,"pages":null},"PeriodicalIF":8.1,"publicationDate":"2024-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142208971","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Enhanced oxidation resistance of high-entropy diborides by multi-component synergistic effects 通过多组分协同效应增强高熵二硼化物的抗氧化性
IF 8.1 2区 材料科学
Science China Materials Pub Date : 2024-08-20 DOI: 10.1007/s40843-024-3045-4
Zhongyu Tang, Zihao Wen, Lei Zhuang, Hulei Yu, Yanhui Chu
{"title":"Enhanced oxidation resistance of high-entropy diborides by multi-component synergistic effects","authors":"Zhongyu Tang, Zihao Wen, Lei Zhuang, Hulei Yu, Yanhui Chu","doi":"10.1007/s40843-024-3045-4","DOIUrl":"https://doi.org/10.1007/s40843-024-3045-4","url":null,"abstract":"<p>Oxidation resistance is critical for high-entropy diborides (HEBs) to be used as thermal structural components under oxygen-containing high-temperature environments. Here, we successfully realize the exploitation of (Zr, Ta, Cr, W) B<sub>2</sub> HEBs with superior oxidation resistance by comprehensively screening their compositions. To be specific, 21 kinds of HEB-<i>x</i>TM (<i>x</i> = 0–25 mol%, TM = Zr, Ta, Cr, and W) samples are fabricated via an ultrafast high-temperature sintering technique. The as-fabricated HEB-5Cr samples show the best oxidation resistance at 1673 K among all the samples. Subsquent oxidation investigations further confirm the as-fabricated HEB-5Cr samples possess superior oxidation resistance with the parabolic oxidation behavior across 1473–1773 K. Such superior oxidation resistance is believed to result from the multi-component synergistic effects. Particularly, the Ta<sup>5+</sup> and W<sup>4+</sup> cations with high ionic field strengths can promote the formation of <sup>4</sup>B–O–<sup>4</sup>B linkages between [BO<sub>4</sub>] tetrahedrons by charge balance, which can stabilize the three-dimensional skeletal structure of B<sub>2</sub>O<sub>3</sub> glass and consequently result in an improved viscosity of the B<sub>2</sub>O<sub>3</sub> glassy layer. In addition, the ZrO<sub>2</sub> and Cr<sub>2</sub>O<sub>3</sub> with high melting points can dissolve into the B<sub>2</sub>O<sub>3</sub> glass to increase its glass transition temperature, leading to an enhanced viscosity of the B<sub>2</sub>O<sub>3</sub> glassy layer.\u0000</p>","PeriodicalId":773,"journal":{"name":"Science China Materials","volume":null,"pages":null},"PeriodicalIF":8.1,"publicationDate":"2024-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142208953","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Elongated antiferromagnetic skyrmion in two-dimensional RuF4 二维 RuF4 中的拉长反铁磁天线
IF 8.1 2区 材料科学
Science China Materials Pub Date : 2024-08-20 DOI: 10.1007/s40843-024-3020-y
Mu Lan, Rong Wang, Shihao Wei, Lezhong Li, Wenning Ren, Xing Zhang, Xi Zhang, Gang Xiang
{"title":"Elongated antiferromagnetic skyrmion in two-dimensional RuF4","authors":"Mu Lan, Rong Wang, Shihao Wei, Lezhong Li, Wenning Ren, Xing Zhang, Xi Zhang, Gang Xiang","doi":"10.1007/s40843-024-3020-y","DOIUrl":"https://doi.org/10.1007/s40843-024-3020-y","url":null,"abstract":"<p>Two-dimensional (2D) antiferromagnetic (AFM) skyrmions are free from stray magnetic field and skyrmion Hall effect, and can be driven by a small current density up to a high speed, desirable for low-power spintronic applications. However, most 2D AFM skyrmions are realized in complex heterostructured materials, which impedes the dense integration of spintronic devices. Here, we propose that 2D AFM skyrmions can be achieved in ruthenium tetrafluoride (RuF<sub>4</sub>) monolayer using hybrid functional theory combined with atomistic spin dynamics simulations. Our study indicates that 2D RuF<sub>4</sub> is dynamically stable and its nondegenerate vibration modes in optical branches are either Raman or infrared active. Furthermore, 2D RuF<sub>4</sub> acts as an indirect bandgap semiconductor with an out-of-plane AFM state. Notably, the presence of a weak Dzyaloshinskii-Moriya interaction in 2D RuF<sub>4</sub> leads to a spin spiral ground state at low temperatures, enabling the formation of AFM skyrmions with possible length modulation by an external magnetic field. Our results give insight into 2D RuF<sub>4</sub> and may provide an intriguing platform for 2D AFM skyrmion-based spintronic applications.\u0000</p>","PeriodicalId":773,"journal":{"name":"Science China Materials","volume":null,"pages":null},"PeriodicalIF":8.1,"publicationDate":"2024-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142208966","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A customized zeolitic imidazolate framework enabling bionic preconcentration of ultralow CO2 可实现超低二氧化碳仿生预浓缩的定制沸石咪唑酸盐框架
IF 8.1 2区 材料科学
Science China Materials Pub Date : 2024-08-20 DOI: 10.1007/s40843-024-3044-0
Hongyang Jin, Ziyang Wang, Guangli Yu, Junchao Dong, Shuai Zhao, Fengchao Cui, Hao Zhang, Guolong Lu, Xiaoqin Zou, Zhiyong Chang
{"title":"A customized zeolitic imidazolate framework enabling bionic preconcentration of ultralow CO2","authors":"Hongyang Jin, Ziyang Wang, Guangli Yu, Junchao Dong, Shuai Zhao, Fengchao Cui, Hao Zhang, Guolong Lu, Xiaoqin Zou, Zhiyong Chang","doi":"10.1007/s40843-024-3044-0","DOIUrl":"https://doi.org/10.1007/s40843-024-3044-0","url":null,"abstract":"<p>Advancing our understanding of global climate, particularly in polar regions, requires accurate detection of carbon dioxide (CO<sub>2</sub>) in ice cores and deep sea environments. However, detecting trace levels of CO<sub>2</sub> in these areas presents significant challenges. We introduce a novel preconcentration approach using functionalized zeolitic imidazolate framework, ZIF-8(CN), for the detection of ultra-low CO<sub>2</sub>. ZIF-8(CN) has small pores (4.4 Å) and cyano groups (–CN), enabling highly selective adsorption of CO<sub>2</sub> (36.2 cm<sup>3</sup> g<sup>−1</sup>) over N<sub>2</sub> (1.6 cm<sup>3</sup> g<sup>−1</sup>) at 298 K. The mechanism involves unique –CN⋯CO<sub>2</sub>⋯–CN interactions within the pore structure. When cast into a film on an aluminum substrate, ZIF-8(CN) demonstrates exceptional CO<sub>2</sub> preconcentration capability (1 ppm in N<sub>2</sub>) with an extraordinary preconcentration factor of 748, outperforming traditional ZIF and zeolite materials. Additionally, a ZIF-8(CN) preconcentrator is designed and fabricated with bionic gas flow of fractal structure which optimizes the gas-film contact, and thus its performance is further improved by 115%.</p>","PeriodicalId":773,"journal":{"name":"Science China Materials","volume":null,"pages":null},"PeriodicalIF":8.1,"publicationDate":"2024-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142208958","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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