Science China Materials最新文献_第8页

One-shot synthesis of heavy-atom-modified carbazole-fused multi-resonance thermally activated delayed fluorescence materials 一次性合成重原子修饰的咔唑融合多共振热激活延迟荧光材料

IF 8.1 2区材料科学

Science China Materials Pub Date : 2024-07-17 DOI: 10.1007/s40843-024-3008-8

Jia-Jun Hu, Jia-Qi Liang, Zhi-Ping Yan, Hua-Xiu Ni, Xiang-Ji Liao, You-Xuan Zheng

{"title":"One-shot synthesis of heavy-atom-modified carbazole-fused multi-resonance thermally activated delayed fluorescence materials","authors":"Jia-Jun Hu, Jia-Qi Liang, Zhi-Ping Yan, Hua-Xiu Ni, Xiang-Ji Liao, You-Xuan Zheng","doi":"10.1007/s40843-024-3008-8","DOIUrl":"https://doi.org/10.1007/s40843-024-3008-8","url":null,"abstract":"Efficient multi-resonance thermally activated delayed fluorescence (MR-TADF) materials hold significant potential for applications in organic light-emitting diodes (OLEDs) and ultra-high-definition displays. However, the stringent synthesis conditions and low yields typically associated with these materials pose substantial challenges for their practical applications. In this study, we introduce an innovative strategy that involves peripheral modification with sulfur and selenium atoms for two materials, CFDBNS and CFDBNSe. This approach enables a directed one-shot borylation process, achieving synthesis yields of 66% and 25%, respectively, while also enhancing reverse intersystem crossing rates. Both emitters exhibit ultra-narrowband sky-blue emissions centered around 474 nm, with full width at half maximum (FWHM) values as narrow as 19 nm in dilute toluene solutions, along with high photoluminescence quantum yields of 98% and 99% in doped films, respectively. The OLEDs based on CFDBNS and CFDBNSe display sky-blue emissions with peaks at 476 and 477 nm and exceptionally slender FWHM values of 23 nm. Furthermore, the devices demonstrate remarkable performances, achieving maximum external quantum efficiencies of 24.1% and 27.2%. This work presents a novel and straightforward approach for the incorporation of heavy atoms, facilitating the rapid construction of efficient MR-TADF materials for OLEDs.","PeriodicalId":773,"journal":{"name":"Science China Materials","volume":null,"pages":null},"PeriodicalIF":8.1,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141740469","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

Boosting photocatalytic water vapor splitting by the integration of porous g-C3N4 and carbonized melamine foam 通过整合多孔 g-C3N4 和碳化三聚氰胺泡沫促进光催化水汽分离

IF 8.1 2区材料科学

Science China Materials Pub Date : 2024-07-17 DOI: 10.1007/s40843-024-3005-y

Shujian Wang, Dongjie Liu, Chunyang Zhang, Jie Huang, Shidong Zhao, Kejian Lu, Biao Wang, Hao Peng, Yitao Si, Maochang Liu

{"title":"Boosting photocatalytic water vapor splitting by the integration of porous g-C3N4 and carbonized melamine foam","authors":"Shujian Wang, Dongjie Liu, Chunyang Zhang, Jie Huang, Shidong Zhao, Kejian Lu, Biao Wang, Hao Peng, Yitao Si, Maochang Liu","doi":"10.1007/s40843-024-3005-y","DOIUrl":"https://doi.org/10.1007/s40843-024-3005-y","url":null,"abstract":"We report a photothermally-induced liquid-solid/gas-solid-decoupling photocatalytic water-splitting system, where a carbonized melamine foam (CMF) and a porous g-C3N4 (PCN) serve as the photothermal substrate and model photocatalyst, respectively. Specifically, liquid water is transformed into the gaseous phase over the CMF due to the photothermal effect, and the generated vapor can be split into hydrogen by PCN via the photocatalysis. This unique biphasic photocatalytic system exhibits a high hydrogen production rate of 368.1 µmol h−1, which is 2.4 and 25.6 times larger than those of the traditional triphasic PCN system (151.7 µmol h−1) and g-C3N4 (CN) system (14.4 µmol h−1), respectively. The improved photocatalytic performance is mainly attributed to the optimized energy and mass transfer at the gas-liquid-solid reaction interface, where gas products are rapidly desorbed in the photocatalytic process. This work provides a novel strategy to enhance the photocatalytic performance from the perspectives of energy and mass flow.\u0000","PeriodicalId":773,"journal":{"name":"Science China Materials","volume":null,"pages":null},"PeriodicalIF":8.1,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141740592","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

Microbial-driven fabrication of rare earth materials 微生物驱动的稀土材料制造

IF 8.1 2区材料科学

Science China Materials Pub Date : 2024-07-17 DOI: 10.1007/s40843-024-2859-4

Huijing Cui, Fan Wang, Chao Ma, Hongjie Zhang, Kai Liu

引用次数: 0

Multicolor V2O5/TiO2 electrochromic films with fast switching and long lifespan for camouflage and information display 用于伪装和信息显示的多色 V2O5/TiO2 电致变色薄膜，切换速度快，使用寿命长

IF 8.1 2区材料科学

Science China Materials Pub Date : 2024-07-17 DOI: 10.1007/s40843-023-2837-x

Xingru Wang, Yang Zheng, Lirong Chen, Rui Ge, Chengyu Jiang, Gang Xu, Xiudi Xiao

{"title":"Multicolor V2O5/TiO2 electrochromic films with fast switching and long lifespan for camouflage and information display","authors":"Xingru Wang, Yang Zheng, Lirong Chen, Rui Ge, Chengyu Jiang, Gang Xu, Xiudi Xiao","doi":"10.1007/s40843-023-2837-x","DOIUrl":"https://doi.org/10.1007/s40843-023-2837-x","url":null,"abstract":"V2O5, which has multicolor and energy storage properties, is a promising electrochromic material for multifunctional electrochromic devices, but its practical application is limited by its poor lifespan and long switching time. In this work, high-performance V2O5/TiO2 films were fabricated by spraying a V2O5 solution on in situ-grown TiO2 nanorods. Due to the porous structure formed between the TiO2 nanorods and the remarkable electron transfer performance of TiO2, the switching time of the V2O5/TiO2 films decreased. Moreover, the strong adhesion between the TiO2 nanorods and F-doped tin oxide (FTO) glass and the increased surface roughness of the substrates significantly improved the cycling stability of the V2O5/TiO2 films. With a large transmittance modulation (47.8% at 668 nm), fast response speed (τc = 5.1 s, τb = 4.2 s), and long lifespan, V2O5/TiO2 films were used as electrodes for the electrochromic energy storage device (EESD), which switched in six colors through color overlay: dark orange, sandy yellow, green-yellow, yellow-green, dark green, and dark brown. Inspired by pixel displays, EESDs were designed by segmenting V2O5 films to stagger the display of the electrochromic and ion storage layers, which presented 11 types of information based on different combinations of colors. This work provides inspiration for developing multifunctional electrochromic devices, especially for camouflage and information displays.\u0000","PeriodicalId":773,"journal":{"name":"Science China Materials","volume":null,"pages":null},"PeriodicalIF":8.1,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141740591","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

Tianmouc vision chip designed for open-world sensing 专为开放世界传感设计的天目视觉芯片

IF 6.8 2区材料科学

Science China Materials Pub Date : 2024-07-17 DOI: 10.1007/s40843-024-3018-x

Haotian Li, Qilin Hua, Guozhen Shen

引用次数: 0

Modulating the interfacial microenvironment via zwitterionic additive for long-cycling aqueous Zn-ion batteries 通过齐聚物添加剂调节界面微环境，实现长循环水性锰离子电池

IF 8.1 2区材料科学

Science China Materials Pub Date : 2024-07-16 DOI: 10.1007/s40843-024-2972-7

Yawen Xie, Shuang Feng, Jiechang Gao, Tao Cheng, Liang Zhang

{"title":"Modulating the interfacial microenvironment via zwitterionic additive for long-cycling aqueous Zn-ion batteries","authors":"Yawen Xie, Shuang Feng, Jiechang Gao, Tao Cheng, Liang Zhang","doi":"10.1007/s40843-024-2972-7","DOIUrl":"https://doi.org/10.1007/s40843-024-2972-7","url":null,"abstract":"Aqueous zinc-ion batteries (AZIBs) have garnered extensive attention as promising energy storage systems because of the advantages of low cost and high safety. However, severe parasitic reactions at the Zn anode surface pose a huge challenge for the practical application of AZIBs, especially the intricate hydrogen evolution reaction (HER) and Zn dendrite growth. Herein, zwitterionic taurine with isoelectric point property is introduced as an electrolyte additive to construct a passivation layer by adapting its net charge to the microenvironment variation for stabilizing the Zn anode. The experimental and theoretical results reveal that taurine can not only in-situ form a hydrophobic and zincophilic layer on the Zn anode surface via the chelation with Zn2+ in the alkaline interfacial microenvironment, but also buffer the pH change dynamically, thus effectively suppressing the HER and Zn dendrite growth. As a consequence, the taurine-containing electrolyte enables a stable cycling of Zn anodes in symmetric Zn∥Zn cells for more than 1800 h under a deep plating/stripping condition (5 mA cm−2 and 5 mAh cm−2). More encouragingly, the full cells coupled with the NH4V4O10 cathode can also exhibit an excellent capacity retention of 89.8% after 1200 cycles. This efficient strategy with an environmental adaptive additive offers valuable insights for mitigating the side reactions to achieve practical AZIBs and beyond.","PeriodicalId":773,"journal":{"name":"Science China Materials","volume":null,"pages":null},"PeriodicalIF":8.1,"publicationDate":"2024-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141740631","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

Security enhancement of artificial neural network using physically transient form of heterogeneous memristors with tunable resistive switching behaviors 利用具有可调电阻开关行为的异质忆阻器的物理瞬态形式增强人工神经网络的安全性

IF 8.1 2区材料科学

Science China Materials Pub Date : 2024-07-16 DOI: 10.1007/s40843-024-2951-2

Jing Sun, Zhan Wang, Xinyuan Wang, Ying Zhou, Yanting Wang, Yunlong He, Yimin Lei, Hong Wang, Xiaohua Ma

{"title":"Security enhancement of artificial neural network using physically transient form of heterogeneous memristors with tunable resistive switching behaviors","authors":"Jing Sun, Zhan Wang, Xinyuan Wang, Ying Zhou, Yanting Wang, Yunlong He, Yimin Lei, Hong Wang, Xiaohua Ma","doi":"10.1007/s40843-024-2951-2","DOIUrl":"https://doi.org/10.1007/s40843-024-2951-2","url":null,"abstract":"As a critical command center in organisms, the brain can execute multiple intelligent interactions through neural networks, including memory, learning and cognition. Recently, memristive-based neuromorphic devices have been widely developed as promising technologies to build artificial synapses and neurons for neural networks. However, multiple information interactions in artificial intelligence devices potentially pose threats to information security. Herein, a transient form of heterogeneous memristor with a stacked structure of Ag/MgO/SiNx/W is proposed, in which both the reconfigurable resistive switching behavior and volatile threshold switching characteristics could be realized by adjusting the thickness of the SiNx layer. The underlying resistive switching mechanism of the device was elucidated in terms of filamentary and interfacial effects. Representative neural functions, including short-term plasticity (STP), the transformation from STP to long-term plasticity, and integrate-and-fire neuron functions, have been successfully emulated in memristive devices. Moreover, the dissolution kinetics associated with underlying transient behaviors were explored, and the water-assisted transfer printing technique was exploited to build transient neuromorphic device arrays on the water-dissolvable poly(vinyl alcohol) substrate, which were able to formless disappear in deionized water after 10-s dissolution at room temperature. This transient form of memristive-based neuromorphic device provides an important step toward information security reinforcement for artificial neural network applications.\u0000","PeriodicalId":773,"journal":{"name":"Science China Materials","volume":null,"pages":null},"PeriodicalIF":8.1,"publicationDate":"2024-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141740467","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

Monitoring and engineering interface coupling between monolayer WS2 and substrate through controllably introducing interfacial strain 通过可控地引入界面应变，监测和设计单层 WS2 与基底之间的界面耦合

IF 8.1 2区材料科学

Science China Materials Pub Date : 2024-07-16 DOI: 10.1007/s40843-024-2948-9

Xiaofei Yue, Jiajun Chen, Jinkun Han, Yabing Shan, Shuwen Shen, Wenxuan Wu, Bingjie Liu, Lijia Li, Yu Chen, Rongjun Zhang, Laigui Hu, Ran Liu, Zhijun Qiu, Chunxiao Cong

{"title":"Monitoring and engineering interface coupling between monolayer WS2 and substrate through controllably introducing interfacial strain","authors":"Xiaofei Yue, Jiajun Chen, Jinkun Han, Yabing Shan, Shuwen Shen, Wenxuan Wu, Bingjie Liu, Lijia Li, Yu Chen, Rongjun Zhang, Laigui Hu, Ran Liu, Zhijun Qiu, Chunxiao Cong","doi":"10.1007/s40843-024-2948-9","DOIUrl":"https://doi.org/10.1007/s40843-024-2948-9","url":null,"abstract":"The interface properties in two-dimensional (2D) layered materials and their van der Waals (vdW) homo-/heterostructures are of importance in both uncovering novel physical phenomena and optimizing device performance. Despite considerable research interest and enthusiasm direct toward the interlayer coupling in 2D homo- and heterostructures, there is limited research on the coupling at the 2D layered material-substrate interface. This limitation is due to the challenges in achieving direct detection. Currently, the coupling mechanisms at the 2D layered material-substrate interface is ambiguous, which needs greater attention. In this study, we have systematically investigated the interface coupling between monolayer WS2 and its supported substrates using high-temperature and high-vacuum in-situ Raman spectroscopy through monitoring the low-frequency Raman mode of monolayer WS2. Our findings reveal that both interfacial spacing and strain can significantly affect the coupling strength between the monolayer WS2 and the supported substrate. More notably, we found that the strategic introduction of appropriate interfacial strain can effectively enhance the interface coupling. Consequently, we have succeeded in achieving effective regulation of the sample-substrate coupling via a convenient way of controlling the cooling process during annealing. Our findings contribute to a deeper understanding of the coupling correlation between 2D layered materials and substrates, which is of great significance for the design and optimization of high-performance devices based on 2D layered semiconductors.\u0000","PeriodicalId":773,"journal":{"name":"Science China Materials","volume":null,"pages":null},"PeriodicalIF":8.1,"publicationDate":"2024-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141740470","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

Bioinspired cation-gated dynamic liquid film nanochannel for controlled transport of ions and molecules 受生物启发的阳离子门控动态液膜纳米通道，用于离子和分子的可控传输

IF 8.1 2区材料科学

Science China Materials Pub Date : 2024-07-16 DOI: 10.1007/s40843-024-2865-3

Chunxiao Liang, Dianyu Wang, Shaofan He, Lu Zhang, Fan Xia, Ye Tian

{"title":"Bioinspired cation-gated dynamic liquid film nanochannel for controlled transport of ions and molecules","authors":"Chunxiao Liang, Dianyu Wang, Shaofan He, Lu Zhang, Fan Xia, Ye Tian","doi":"10.1007/s40843-024-2865-3","DOIUrl":"https://doi.org/10.1007/s40843-024-2865-3","url":null,"abstract":"Calcium-gated nanochannels in vivo play an important role in many life activities. Inspired by biological ion channels, artificial ion gating has been extensively studied. However, conventional ion gating relies on asymmetric charge structures and fixed nanochannel sizes, resulting in difficult channel blocking and low gating ratios. Herein, a dynamic liquid film nanochannel is constructed by inserting an oil droplet into a carboxylated glass capillary filled with ion solution. The liquid film between the oil and capillary is used as a nanochannel to transport ions and molecules, and the height of the nanochannel can be flexibly controlled by the electrostatic force between the oil–water and water–solid interfaces. The switching of the liquid film nanochannel depends on the ion valence. Compared to monovalent ions, the introduction of multivalent ions yields less negative zeta potential at both the oil–water and water–solid interfaces, which in turn reduces the electrostatic repulsion force between the oil–water and water–solid interfaces, resulting in the nanochannel changing from the “ON” state to the “OFF” state. The system shows good cyclic gating performance and high gating ratios up to ∼1000. Moreover, this cation-gated liquid film nanochannel enables controlled transport of molecules such as rhodamine 6G. In this paper, we present a convenient intelligent nanochannel capable of regulating the transport of ions and molecules within the liquid film simply by adjusting the electrostatic force between the oil–water and water–solid interfaces. This research holds promise for applications in drug delivery, biosensing, species separation, and beyond.","PeriodicalId":773,"journal":{"name":"Science China Materials","volume":null,"pages":null},"PeriodicalIF":8.1,"publicationDate":"2024-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141740468","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

Temperature-driven sustainable anti-scaling on phase-change lubricant-infused surface 相变润滑剂注入表面的温度驱动可持续防结垢技术

IF 8.1 2区材料科学

Science China Materials Pub Date : 2024-07-15 DOI: 10.1007/s40843-024-2895-4

Maosheng Ye, Wei Chen, Yixuan Wang, Ran Zhao, Wuyi Xiao, Jiexin Li, Jingxin Meng, Shutao Wang

引用次数: 0