Science China Materials最新文献

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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 6.8 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 \u0000 (,&nbsp;),&nbsp;Zihao Wen \u0000 (,&nbsp;),&nbsp;Lei Zhuang \u0000 (,&nbsp;),&nbsp;Hulei Yu \u0000 (,&nbsp;),&nbsp;Yanhui Chu \u0000 (,&nbsp;)","doi":"10.1007/s40843-024-3045-4","DOIUrl":"10.1007/s40843-024-3045-4","url":null,"abstract":"<div><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><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":773,"journal":{"name":"Science China Materials","volume":"67 10","pages":"3392 - 3400"},"PeriodicalIF":6.8,"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 6.8 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 \u0000 (,&nbsp;),&nbsp;Rong Wang \u0000 (,&nbsp;),&nbsp;Shihao Wei \u0000 (,&nbsp;),&nbsp;Lezhong Li \u0000 (,&nbsp;),&nbsp;Wenning Ren \u0000 (,&nbsp;),&nbsp;Xing Zhang \u0000 (,&nbsp;),&nbsp;Xi Zhang \u0000 (,&nbsp;),&nbsp;Gang Xiang \u0000 (,&nbsp;)","doi":"10.1007/s40843-024-3020-y","DOIUrl":"10.1007/s40843-024-3020-y","url":null,"abstract":"<div><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><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":773,"journal":{"name":"Science China Materials","volume":"67 10","pages":"3282 - 3287"},"PeriodicalIF":6.8,"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 6.8 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 \u0000 (,&nbsp;),&nbsp;Ziyang Wang \u0000 (,&nbsp;),&nbsp;Guangli Yu \u0000 (,&nbsp;),&nbsp;Junchao Dong \u0000 (,&nbsp;),&nbsp;Shuai Zhao \u0000 (,&nbsp;),&nbsp;Fengchao Cui \u0000 (,&nbsp;),&nbsp;Hao Zhang \u0000 (,&nbsp;),&nbsp;Guolong Lu \u0000 (,&nbsp;),&nbsp;Xiaoqin Zou \u0000 (,&nbsp;),&nbsp;Zhiyong Chang \u0000 (,&nbsp;)","doi":"10.1007/s40843-024-3044-0","DOIUrl":"10.1007/s40843-024-3044-0","url":null,"abstract":"<div><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></div>","PeriodicalId":773,"journal":{"name":"Science China Materials","volume":"67 10","pages":"3401 - 3407"},"PeriodicalIF":6.8,"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
Reversible electrochromism in α-In2Se3 through ferroelectric switching induced phase transition 通过铁电转换诱导相变实现 α-In2Se3 中的可逆电致色性
IF 8.1 2区 材料科学
Science China Materials Pub Date : 2024-08-19 DOI: 10.1007/s40843-024-3060-1
Zhongshen Luo, Qingyuan Wang, Runcang Feng, Shun Wang, Zhou Zhou, Yiqi Hu, Qiankun Li, Qingyu Yan, Zhijian Feng, Yanfei Hou, Tianhao Ying, Yuyan Weng, Liang Fang, Lu You
{"title":"Reversible electrochromism in α-In2Se3 through ferroelectric switching induced phase transition","authors":"Zhongshen Luo, Qingyuan Wang, Runcang Feng, Shun Wang, Zhou Zhou, Yiqi Hu, Qiankun Li, Qingyu Yan, Zhijian Feng, Yanfei Hou, Tianhao Ying, Yuyan Weng, Liang Fang, Lu You","doi":"10.1007/s40843-024-3060-1","DOIUrl":"https://doi.org/10.1007/s40843-024-3060-1","url":null,"abstract":"<p>Electrochromic materials change color or opacity when subjected to electrical stimuli, often through reversible chemical reactions or phase transitions. Their optical switch capabilities make them promising for applications like smart windows and glasses, thus garnering widespread attention in recent years. Van der Waals layered ferroelectric α-In<sub>2</sub>Se<sub>3</sub>, known for its rich polymorphs, is a promising candidate for exploring physical property modulation via phase transformations. However, the discovery of electrochromism in In<sub>2</sub>Se<sub>3</sub> has been impeded by similar optical constants among its polymorphs. Herein, we report the experimental observation of reversible electrochromism in α-In<sub>2</sub>Se<sub>3</sub> thin flakes accompanied by ferroelectric polarization switching. Microscopic structural characterizations reveal that the color change stems from a crystalline-to-amorphous phase transition. An improved Kramer-Kronig analysis was employed to quantify the change in optical constants of the flake. A disordered polarization switching model, inherent to the crystal symmetry of α-In<sub>2</sub>Se<sub>3</sub>, was proposed to explain the electrically driven amorphization. This work delivers distinct insight into the unique electrochromic behavior and unveils opportunities of relevant applications for the van der Waals layered ferroelectric.\u0000</p>","PeriodicalId":773,"journal":{"name":"Science China Materials","volume":"23 1","pages":""},"PeriodicalIF":8.1,"publicationDate":"2024-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142208955","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
Noncationic polymer-assisted carrier for nucleic acid drug delivery 用于核酸药物输送的非阳离子聚合物辅助载体
IF 8.1 2区 材料科学
Science China Materials Pub Date : 2024-08-15 DOI: 10.1007/s40843-024-3048-0
Miao Su, Junbin Chen, Yueqiang Zhu, Chaoran Chen, Yuxi Zhang, Xianzhu Yang
{"title":"Noncationic polymer-assisted carrier for nucleic acid drug delivery","authors":"Miao Su, Junbin Chen, Yueqiang Zhu, Chaoran Chen, Yuxi Zhang, Xianzhu Yang","doi":"10.1007/s40843-024-3048-0","DOIUrl":"https://doi.org/10.1007/s40843-024-3048-0","url":null,"abstract":"<p>Nucleic acid drugs are emerging as a novel biotherapeutic modality for disease treatment, targeting nucleic acids to regulate the protein translation process and thereby facilitating disease management. They hold significant promise in biomedical applications and treatment avenues. Given their negative charge, high molecular weight, and hydrophilic properties, nucleic acid drugs require carriers to traverse multiple biological barriers and facilitate intracellular delivery. Cationic material-based carriers present an unprecedented opportunity to address these challenges through electrostatic interactions with nucleic acids. However, concerns regarding the biosafety and cytotoxic responses of cationic materials have emerged in early clinical studies. As a result, the use of non-cationic polymer carriers, by controlling or circumventing the use of cationic materials, represents a promising approach for nucleic acid delivery. In this review, we highlight various designs of non-cationic polymer carriers that go beyond the principle of electrostatic interactions, including conjugation, chemical bonding, physical crosslinking, hydrophobic interactions, and coordination bonding with nucleic acids. Additionally, we discuss strategies for enhancing the efficiency of nucleic acid delivery and therapeutic effects of non-cationic polymer carriers, focusing on targeted delivery, cellular internalization, and endosomal escape.</p>","PeriodicalId":773,"journal":{"name":"Science China Materials","volume":"62 1","pages":""},"PeriodicalIF":8.1,"publicationDate":"2024-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142208959","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
Ultrastrong multifunctional assembled 2D materials 超强多功能组装二维材料
IF 6.8 2区 材料科学
Science China Materials Pub Date : 2024-08-14 DOI: 10.1007/s40843-024-3085-x
Yury Gogotsi
{"title":"Ultrastrong multifunctional assembled 2D materials","authors":"Yury Gogotsi","doi":"10.1007/s40843-024-3085-x","DOIUrl":"10.1007/s40843-024-3085-x","url":null,"abstract":"","PeriodicalId":773,"journal":{"name":"Science China Materials","volume":"67 10","pages":"3415 - 3416"},"PeriodicalIF":6.8,"publicationDate":"2024-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142518448","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
Switchable K–O bonds unveiling anomalous ferroelastic transitions in a polar hybrid crystal 可转换 K-O 键揭示极性杂化晶体中的反常铁弹性跃迁
IF 6.8 2区 材料科学
Science China Materials Pub Date : 2024-08-13 DOI: 10.1007/s40843-024-2918-8
Yao-Bin Li  (, ), Wei-Jian Xu  (, ), Xiao-Xian Chen  (, ), De-Xuan Liu  (, ), Zhi-Shuo Wang  (, ), Wei-Xiong Zhang  (, )
{"title":"Switchable K–O bonds unveiling anomalous ferroelastic transitions in a polar hybrid crystal","authors":"Yao-Bin Li \u0000 (,&nbsp;),&nbsp;Wei-Jian Xu \u0000 (,&nbsp;),&nbsp;Xiao-Xian Chen \u0000 (,&nbsp;),&nbsp;De-Xuan Liu \u0000 (,&nbsp;),&nbsp;Zhi-Shuo Wang \u0000 (,&nbsp;),&nbsp;Wei-Xiong Zhang \u0000 (,&nbsp;)","doi":"10.1007/s40843-024-2918-8","DOIUrl":"10.1007/s40843-024-2918-8","url":null,"abstract":"<div><p>Hybrid ferroelastic crystals have garnered considerable interest due to their promising potential as mechanical switches and sensors. The anomalous ferroelastic phase transitions, in which ferroelasticity occurs in the high-temperature phase rather than the low-temperature phase, are of particular interest, but they are sporadically-documented and none of them is involved in breaking of the chemical bonds. Herein, a hydroxyl-containing cation, <i>i.e.</i>, Me<sub>3</sub>NOH<sup>+</sup>, is employed to construct a three-dimensional hybrid crystal (Me<sub>3</sub>NOH)<sub>2</sub>KBiCl<sub>6</sub> (1). This crystal undergoes distinct two-step structural phase transitions with space-group changes of <i>Pna</i>2<sub>1</sub>–<i>P</i>112<sub>1</sub>–<i>P</i>6<sub>3</sub><i>mc</i>, belonging to an anomalous temperature-reversed <i>mm</i>2<i>F</i>2 ferroelastic transition and a normal 6<i>mmF</i>2 ferroelastic transition, respectively. The anomalous ferroelastic transition is entirely driven by switchable K–O coordination bonds involving breaking and reformation. Notably, the dynamic behavior of Me<sub>3</sub>NOH<sup>+</sup> cations along with the distortion of inorganic framework enables the manifestation of unusual “high-low-medium” second-harmonic generation-switching behaviors. This study presents the enormous benefits of switchable coordination bonds for inducing anomalous ferroelastic phase transitions, offering valuable insight for the exploration of new multifunctional ferroelastic materials.\u0000</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":773,"journal":{"name":"Science China Materials","volume":"67 10","pages":"3408 - 3414"},"PeriodicalIF":6.8,"publicationDate":"2024-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142208957","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
Photothermal phase change material microcapsules via cellulose nanocrystal and graphene oxide co-stabilized Pickering emulsion for solar and thermal energy storage 通过纤维素纳米晶和氧化石墨烯共稳定皮克林乳液实现光热相变材料微胶囊,用于太阳能和热能储存
IF 6.8 2区 材料科学
Science China Materials Pub Date : 2024-08-12 DOI: 10.1007/s40843-024-3040-5
Wang Sun  (, ), Zhe Zhang  (, ), Zhen Zhang  (, ), Nisha He  (, ), Qiang Wei  (, ), Liu Feng  (, ), Zhenghao Wang  (, ), Jie Wu  (, ), Can Liu  (, ), Shiyu Fu  (, ), Yelin Hou  (, ), Gilles Sèbe, Guofu Zhou  (, )
{"title":"Photothermal phase change material microcapsules via cellulose nanocrystal and graphene oxide co-stabilized Pickering emulsion for solar and thermal energy storage","authors":"Wang Sun \u0000 (,&nbsp;),&nbsp;Zhe Zhang \u0000 (,&nbsp;),&nbsp;Zhen Zhang \u0000 (,&nbsp;),&nbsp;Nisha He \u0000 (,&nbsp;),&nbsp;Qiang Wei \u0000 (,&nbsp;),&nbsp;Liu Feng \u0000 (,&nbsp;),&nbsp;Zhenghao Wang \u0000 (,&nbsp;),&nbsp;Jie Wu \u0000 (,&nbsp;),&nbsp;Can Liu \u0000 (,&nbsp;),&nbsp;Shiyu Fu \u0000 (,&nbsp;),&nbsp;Yelin Hou \u0000 (,&nbsp;),&nbsp;Gilles Sèbe,&nbsp;Guofu Zhou \u0000 (,&nbsp;)","doi":"10.1007/s40843-024-3040-5","DOIUrl":"10.1007/s40843-024-3040-5","url":null,"abstract":"<div><p>Phase change materials (PCMs) have attracted significant attention in thermal management due to their ability to store and release large amounts of heat during phase transitions. However, their widespread application is restricted by leakage issues. Encapsulating PCMs within polymeric microcapsules is a promising strategy to prevent leakage and increase heat transfer area with matrices. Moreover, photothermal PCM microcapsules are particularly desirable for solar energy storage. Herein, we fabricated photothermal PCM microcapsules with melamine-formaldehyde resin (MF) as shell using cellulose nanocrystal (CNC) and graphene oxide (GO) co-stabilized Pickering emulsion droplets as templates. CNC displays outstanding Pickering emulsifying ability and can facilitate the fixation of GO at the oil-water interface, resulting in a stable CNC/GO co-stabilized PCM Pickering emulsion. A polydopamine (PDA) layer was coated <i>in-situ</i> on the emulsion droplets via oxidization self-polymerization of dopamine. Meanwhile, GO was reduced to reduced GO (rGO) due to the reducing ability of PDA. The outmost MF shell of the PCM microcapsules was formed <i>in-situ</i> through the polymerization and crosslinking of MF prepolymer. The resulted PCM@CNC/rGO/PDA/MF microcapsules exhibit uniform sizes in the micrometer range, excellent leakage-proof performance, high phase change enthalpy (175.4 J g<sup>−1</sup>) and PCM encapsulation content (84.2%). Moreover, the presence of rGO and PDA endows PCM@CNC/rGO/PDA/MF microcapsules with outstanding photothermal conversion performance. The temperature of PCM@CNC/rGO/PDA/MF microcapsule slurries (15wt.%) can reach 73°C after light irradiation at 1 W cm<sup>−2</sup>. Therefore, photothermal PCM@CNC/rGO/PDA/MF microcapsules are promising for solar energy harvesting, thermal energy storage, and release in various applications, such as energy-efficient buildings and smart textiles.\u0000</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":773,"journal":{"name":"Science China Materials","volume":"67 10","pages":"3225 - 3235"},"PeriodicalIF":6.8,"publicationDate":"2024-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142208998","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
Chiral perturbation in D-O-A organic phosphors towards efficient circularly polarized electroluminescence D-O-A 有机荧光粉中的手性扰动,实现高效圆极化电致发光
IF 8.1 2区 材料科学
Science China Materials Pub Date : 2024-08-12 DOI: 10.1007/s40843-024-3042-1
Ying Yang, Shuai Xiao, Yan Zhou, Changsheng Shi, Lulin Xu, Xiangji Liao, Ning Su, Ning Sun, You-Xuan Zheng, Liming Ding, Junqiao Ding
{"title":"Chiral perturbation in D-O-A organic phosphors towards efficient circularly polarized electroluminescence","authors":"Ying Yang, Shuai Xiao, Yan Zhou, Changsheng Shi, Lulin Xu, Xiangji Liao, Ning Su, Ning Sun, You-Xuan Zheng, Liming Ding, Junqiao Ding","doi":"10.1007/s40843-024-3042-1","DOIUrl":"https://doi.org/10.1007/s40843-024-3042-1","url":null,"abstract":"<p>Chiral organic phosphors with room-temperature phosphorescence (RTP) show a great potential in high-performance circularly polarized organic light-emitting diodes (CP-OLEDs). As a proof of concept, herein, we report a pair of chiral RTP enantiomers (<i>S/R</i>)-CP-RTP-D1 with acridine as the donor (D), triazine as the acceptor (A), oxygen as the bridge, and (<i>S/R</i>)-2-methylbutane as the chiral alkyl chain. It is found that the effective chiral perturbation can endow (<i>S/R</i>)-CP-RTP-D1 with mirror symmetric chiroptical properties, while maintaining the characteristic RTP emission. Consequently, the corresponding doped and non-doped CP-OLEDs based on (<i>S/R</i>)-CP-RTP-D1 achieve obvious circularly polarized electroluminescence (CPEL) signals, revealing promising external quantum efficiencies of 14.9% and 13.0% with the dissymmetry factors ∣<i>g</i><sub>EL</sub>∣ of 7.00 × 10<sup>−4</sup> and 9.87 × 10<sup>−4</sup>, respectively. These results highlight that chiral perturbation in D-O-A organic phosphors is a reliable strategy towards efficient CPEL.\u0000</p>","PeriodicalId":773,"journal":{"name":"Science China Materials","volume":"58 1","pages":""},"PeriodicalIF":8.1,"publicationDate":"2024-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142208956","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 highly linear stretchable MXene-based biocompatible hydrogel–elastomer hybrid with tissue-level softness 具有组织级柔软度的高线性可拉伸 MXene 生物相容性水凝胶-弹性体混合物
IF 6.8 2区 材料科学
Science China Materials Pub Date : 2024-08-09 DOI: 10.1007/s40843-024-2985-8
Shu Wan  (, ), Haizhou Huang  (, ), Zisheng He  (, ), Yizhou Ye  (, ), Shen Li  (, ), Shi Su  (, ), Jiaxin Shen  (, ), Longxiang Han  (, ), Peng Wan  (, ), Xu Ran  (, ), Li Chen  (, ), Xuefeng He  (, ), Litao Sun  (, ), Hengchang Bi  (, )
{"title":"A highly linear stretchable MXene-based biocompatible hydrogel–elastomer hybrid with tissue-level softness","authors":"Shu Wan \u0000 (,&nbsp;),&nbsp;Haizhou Huang \u0000 (,&nbsp;),&nbsp;Zisheng He \u0000 (,&nbsp;),&nbsp;Yizhou Ye \u0000 (,&nbsp;),&nbsp;Shen Li \u0000 (,&nbsp;),&nbsp;Shi Su \u0000 (,&nbsp;),&nbsp;Jiaxin Shen \u0000 (,&nbsp;),&nbsp;Longxiang Han \u0000 (,&nbsp;),&nbsp;Peng Wan \u0000 (,&nbsp;),&nbsp;Xu Ran \u0000 (,&nbsp;),&nbsp;Li Chen \u0000 (,&nbsp;),&nbsp;Xuefeng He \u0000 (,&nbsp;),&nbsp;Litao Sun \u0000 (,&nbsp;),&nbsp;Hengchang Bi \u0000 (,&nbsp;)","doi":"10.1007/s40843-024-2985-8","DOIUrl":"10.1007/s40843-024-2985-8","url":null,"abstract":"<div><p>Maintaining low modulus while endowing the wide-range linear stretchability to wearable or implantable devices is crucial for these devices to reduce the mechanical mismatch between the devices and human skin/tissue interfaces. However, improving linear stretchability often results in an increased modulus of stretchable electronic materials, which hinders their conformability in long-term quantifiable monitoring of organs. Herein, we develop a hybrid structure involving interlocking low-modulus porous elastomers (Ecoflex-0030) and MXene-based hydrogels with crosslinking networks of polyvinyl alcohol, sodium alginate, and MXene. This hydrogel–elastomer structure exhibits superior performance compared with previous reports, with a wide linear stretchability strain range from 0 to 1000% and maintaining a low modulus of 6.4 kPa. Moreover, the hydrogel–elastomer hybrids can be utilized as highly sensitive strain sensors with remarkable characteristics, including high sensitivity (gauge factor ∼3.52), a linear correlation between the resistance and strain (0–200%), rapid response (0.18 s) and recovery times (0.21 s), and excellent electrical reproducibility (1000 loading–unloading cycles). Those electrical and mechanical properties allow the sensor to act as a suitable quantifiable equipment in organ monitoring, human activities detecting, and human–machine interactions.</p></div>","PeriodicalId":773,"journal":{"name":"Science China Materials","volume":"67 10","pages":"3368 - 3378"},"PeriodicalIF":6.8,"publicationDate":"2024-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142209000","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}
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