IF 13.3 2区材料科学

Small Pub Date : 2025-04-25 DOI: 10.1002/smll.202503097

Yong Lu, Ting-Ting Wu, Ming Li, Si-Si Song, Xiang-Dong Liu, Zheng-Zheng Li, Yu-x. Feng, Hua Bai, Hailong Wang, Bin-Bin Xu, Feng Ru Fan, Tingting Zhu, Emeline Raguin, Shahrouz Amini, Peter Fratzl, Zhong-Qun Tian, Yuan Jiang

{"title":"Tailoring Self-Organized Growth of Biomimetic Inorganic–Organic Multilayers with a Permeable Microcompartment","authors":"Yong Lu, Ting-Ting Wu, Ming Li, Si-Si Song, Xiang-Dong Liu, Zheng-Zheng Li, Yu-x. Feng, Hua Bai, Hailong Wang, Bin-Bin Xu, Feng Ru Fan, Tingting Zhu, Emeline Raguin, Shahrouz Amini, Peter Fratzl, Zhong-Qun Tian, Yuan Jiang","doi":"10.1002/smll.202503097","DOIUrl":"https://doi.org/10.1002/smll.202503097","url":null,"abstract":"Organisms such as marine glass sponges, molluscan animals, crustaceans, and mammals develop inorganic–organic multilayers in ambient conditions. This structural motif of inorganic–organic multilayers has a central function in reconciling strength and toughness, nacre being a well-studied example. Although biomimetic multilayers have been successfully processed through particle assembly and multistep deposition, the development of a self-organized approach to transforming molecular subunits into this macroscopic architecture remains a challenging task. The present study introduces a permeable microcompartment for the self-organized growth of an inorganic–organic multilayer. In the microcompartment enclosed by a graphene oxide membrane, multiple mineral layers separated by nanometer-thin organic layers grow via a phase-separation process that can be described quantitatively through a kinetic model. This model permits the adjustment of boundary conditions to regulate the average thickness of the mineral layers in a predictable manner. The synthetic process can be applied to a wide range of mineral compositions, polymorphs, as well as organic interphase. Particularly, the deliberate introduction of a continuous polymeric interphase provides a means of localizing the damage through crack deflection. This opens the possibility of using self-organization within a permeable microcompartment to facilitate the growth of biomimetic inorganic–organic multilayers with a range of structural and functional properties.","PeriodicalId":228,"journal":{"name":"Small","volume":"33 1","pages":""},"PeriodicalIF":13.3,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143872713","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

Effects of DNA Origami-Based Nanoagent Design on Apoptosis Induction in a Large 3D Cancer Spheroid Model 基于DNA折纸的纳米剂设计对大型三维肿瘤球体模型诱导细胞凋亡的影响

IF 13.3 2区材料科学

Small Pub Date : 2025-04-25 DOI: 10.1002/smll.202502490

Johann M. Weck, Riya Nair, Merve-Z. Kesici, Xiaoyue Shang, Svetozar Gavrilović, Cornelia Monzel, Amelie Heuer-Jungemann

{"title":"Effects of DNA Origami-Based Nanoagent Design on Apoptosis Induction in a Large 3D Cancer Spheroid Model","authors":"Johann M. Weck, Riya Nair, Merve-Z. Kesici, Xiaoyue Shang, Svetozar Gavrilović, Cornelia Monzel, Amelie Heuer-Jungemann","doi":"10.1002/smll.202502490","DOIUrl":"https://doi.org/10.1002/smll.202502490","url":null,"abstract":"DNA origami offers highly accurate control over shape and addressability on the nanoscale. This precise control makes it highly valuable in various fields, particularly precision nanotherapeutics. For cancer treatment, the extrinsic activation of programmed cell death by Fas receptor (FasR)/CD95-based nanoagents is a promising, minimally invasive strategy. However, treating large, solid tumors poses challenges for the design of DNA origami-based therapeutics, including drug distribution and altered cellular behavior. Here, these challenges are addressed by establishing design principles for nanoagents and testing them in a 3D cancer spheroid model. First, the ability of DNA origami nanostructures are assessed to penetrate large cancer spheroids, finding that penetration is influenced by the DNA origami size rather than its structural flexibility. Second, the capability of FasL-DNA origami-based nanoagents are evaluated to induce apoptosis in cancer spheroids, representing a more biologically relevant environment, compared to 2D studies. It is found that apoptosis induction is primarily determined by the FasL attachment strategy rather than the underlying DNA origami structure. The most effective nanoagents constructed in this study halted spheroid growth and eradicated all cancer cells within the spheroids. This study offers important insights into critical design considerations for DNA-based therapeutics for complex cellular environments, advancing DNA origami nanotherapeutic development.","PeriodicalId":228,"journal":{"name":"Small","volume":"74 1","pages":""},"PeriodicalIF":13.3,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143872682","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 Coral Shell-Inspired Biomimetic Soy Protein Adhesive Toward Electromagnetic Shielding Wood-Based Composites 珊瑚壳启发的仿生大豆蛋白胶粘剂对电磁屏蔽木基复合材料的影响

IF 13.3 2区材料科学

Small Pub Date : 2025-04-25 DOI: 10.1002/smll.202502135

Li Cai, Xin Zhang, Yue Li, Hangyang Li, Shusheng Liao, Jing Luo, Pingan Song, Jianzhang Li, Qiang Gao, Hui Chen, Jingchao Li

{"title":"A Coral Shell-Inspired Biomimetic Soy Protein Adhesive Toward Electromagnetic Shielding Wood-Based Composites","authors":"Li Cai, Xin Zhang, Yue Li, Hangyang Li, Shusheng Liao, Jing Luo, Pingan Song, Jianzhang Li, Qiang Gao, Hui Chen, Jingchao Li","doi":"10.1002/smll.202502135","DOIUrl":"https://doi.org/10.1002/smll.202502135","url":null,"abstract":"The development of multifunctional bio-adhesives that are electrically conductive, flame-retardant, and electromagnetic shielding is crucial for advancing next-generation wood-based composites. However, to date it remains a significant challenge to achieve such functionalities in adhesives while maintaining their strong adhesion. This study draws inspirations from the microstructure and properties of coral shells, and proposed a multiphase engineering to prepare a multifunctional soy protein isolate (SPI) adhesive (SPI/PA@G) by introducing a hierarchical polyaniline/phenylphosphonic acid aggregates-loaded graphene nanoplatelets (GNPs) hybrid. Because of the presence of polyaniline/phenylphosphonic acid aggregates, the designed SPI/PA@G adhesive exhibits remarkable flame retardancy with a high limiting oxygen index value of ≈39.4%. Because the GNPs in the adhesive form a highly conductive network on wood particles surfaces, as-prepared wood-based composite achieves an electrical conductivity as high as 43100 S m−1, and gives rise to an electromagnetic shielding effectiveness of 52.1 dB. In addition, multiple crosslinking interactions endow the SPI/PA@G adhesive with excellent bonding strength, as reflected by a high flexural strength of 19.7 MPa for the wood-based composite. This study offers a new approach to the design of multifunctional adhesives and their advanced wood-based composites, which holds great potential for real-world applications in creating advanced functional wooden products and beyond.","PeriodicalId":228,"journal":{"name":"Small","volume":"38 1","pages":""},"PeriodicalIF":13.3,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143872711","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

High Rectification Ratio Self-Rectifying Memristor Crossbar Array for Convolutional Neural Network Operations 用于卷积神经网络运算的高整流比自整流忆阻交叉栅阵列

IF 13.3 2区材料科学

Small Pub Date : 2025-04-25 DOI: 10.1002/smll.202500062

Jiang Zhao, Yingfang Zhu, Shaoan Yan, Gang Li, Rui Liu, Qing Zhong, Jiang Bian, Mengping Peng, Qingjiang Li, Yutong Li, Xiaojian Zhu, Minghua Tang

{"title":"High Rectification Ratio Self-Rectifying Memristor Crossbar Array for Convolutional Neural Network Operations","authors":"Jiang Zhao, Yingfang Zhu, Shaoan Yan, Gang Li, Rui Liu, Qing Zhong, Jiang Bian, Mengping Peng, Qingjiang Li, Yutong Li, Xiaojian Zhu, Minghua Tang","doi":"10.1002/smll.202500062","DOIUrl":"https://doi.org/10.1002/smll.202500062","url":null,"abstract":"Oxide-based self-rectifying memristors have emerged as promising candidates for the construction of neural networks, owing to their advantageous features such as high-density integration, low power consumption, 3D stackability, straightforward fabrication processes, and compatibility with complementary metal-oxide-semiconductor (CMOS) technology. Notwithstanding these merits, there remains considerable scope for the suppression of parasitic currents in large-scale memristor arrays, which poses a notable challenge in the development of extensive neural networks capable of executing intricate computational tasks. This study introduces a 1 kbit self-rectifying memristor array based on Pt/HfO2/Ti structural units. Individual devices in this array not only exhibit switching ratios exceeding 103, but also maintain rectification ratios greater than 105, and their excellent negative rectification performance effectively suppresses latent path currents in the array. Moreover, the convolutional calculation logic and forward inference process of 8-bit neural networks are demonstrated based on this array, which verifies the feasibility of using arrays to simulate convolutional neural networks for all hardware operations. Ultimately, a complete convolutional neural network system is constructed, the system achieving a recognition rate of up to 98% in the handwriting recognition task. This work provides a new strategy toward the implementation of all-hardware computing for convolutional neural networks.","PeriodicalId":228,"journal":{"name":"Small","volume":"14 1","pages":""},"PeriodicalIF":13.3,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143872675","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 Oxygen Electrocatalysis in CoN-CoSe2 Heterogeneous Hollow Nanocages with Engineered Build-In Electric Field for Zn–Air Batteries 锌-空气电池用CoN-CoSe2非均质空心纳米笼内外加电场增强氧电催化

IF 13.3 2区材料科学

Small Pub Date : 2025-04-25 DOI: 10.1002/smll.202412068

Tiantian Tang, Hanwen He, Yukun Liu, Hongrui Yang, Jiabei Yu, Xinshuang Lin, Yang Song, Sen Zhang, Chao Deng

{"title":"Boosting Oxygen Electrocatalysis in CoN-CoSe2 Heterogeneous Hollow Nanocages with Engineered Build-In Electric Field for Zn–Air Batteries","authors":"Tiantian Tang, Hanwen He, Yukun Liu, Hongrui Yang, Jiabei Yu, Xinshuang Lin, Yang Song, Sen Zhang, Chao Deng","doi":"10.1002/smll.202412068","DOIUrl":"https://doi.org/10.1002/smll.202412068","url":null,"abstract":"The exploration of oxygen catalyst with superior behaviors in a wide temperature range is a key issue for Zn–air battery. Herein, the CoN-CoSe2@C hollow cages with a built-in electric field (BIEF) on heterointerface are explored as the oxygen electrocatalyst for Zn–air battery (ZAB). Based on the theoretical analysis, the large work function difference (∆WF) of CoN-CoSe2 heterostructure propels the interfacial electron redistribution, which results in the strong BIEF and facilitates high catalytic activities. In addition, the CoN-CoSe2 nanocrystals are embedded in the hollow carbon nanocage to fully realize its performance. The central hollow structure of the carbon based nanocages provides the facile electron/ion/mass pathways and endows fast kinetics. Taking the advantages of both the strong BIEF and the well-designed substrate, the CoN-CoSe2@C hollow cages achieve the superior bifunctional electrocatalytic behaviors and good cycling performance even down to low-temperature such as −30 °C. Moreover, the full ZAB with CoN-CoSe2@C hollow cage cathode shows the superior performance and high reliability in diverse working conditions. Therefore, it is a promising power source candidate for the electronics in practical applications.","PeriodicalId":228,"journal":{"name":"Small","volume":"56 1","pages":""},"PeriodicalIF":13.3,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143872709","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

Correction to “Ta4C3 Nanosheets as a Novel Therapeutic Platform for Photothermal-Driven ROS Scavenging and Immune Activation Against Antibiotic-Resistant Infections in Diabetic Wounds” 更正“Ta4C3纳米片作为光热驱动的ROS清除和免疫激活对抗糖尿病伤口抗生素耐药感染的新治疗平台”

IF 13.3 2区材料科学

Small Pub Date : 2025-04-25 DOI: 10.1002/smll.202502209

Yapeng Wang, Jing Yang, Yunhong Ma, Jun Liu, Peng Wang, Junhao Luo, Yongjun Rui, Yongwei Wu

{"title":"Correction to “Ta4C3 Nanosheets as a Novel Therapeutic Platform for Photothermal-Driven ROS Scavenging and Immune Activation Against Antibiotic-Resistant Infections in Diabetic Wounds”","authors":"Yapeng Wang, Jing Yang, Yunhong Ma, Jun Liu, Peng Wang, Junhao Luo, Yongjun Rui, Yongwei Wu","doi":"10.1002/smll.202502209","DOIUrl":"https://doi.org/10.1002/smll.202502209","url":null,"abstract":"small, 2024, 20, 2400741\u0000DOI: 10.1002/smll.202400741\u0000We sincerely acknowledge an error in the originally published Figure 5i (Ta₄C₃ NSs + NIR group). The correct image is provided below. We confirm that this correction does not affect the scientific conclusions or overall interpretation of the study. We apologize for any confusion this may have caused and appreciate the readers' understanding:\u0000<img alt=\"image\" loading=\"lazy\" src=\"/cms/asset/e88913fb-daa9-47cd-a309-957ff11d8053/smll202502209-gra-0001.png\"/>\u0000Figure 5. Assessing Immune Memory Triggered by Ta4C3 NSs and NIR in a Recurrent MRSA Infection Model. A) Illustrates the development of the abscess model and the treatment strategy. On Day 30, the concentrations of serum interleukins IL-4 B), IFN𝛾 C), IL-17 D), and TNF-𝛼 E) were quantified (mean ± SEM, n = 5). F) To evaluate memory B (mB) cells, blood single-cell suspensions were subjected to flow cytometry (FCM) analysis following staining with CD45, CD31, and CD19 antibodies (mean ± SEM, n = 5). G–J) The study included an assessment of CD45+ B220+ memory B cells in lymph nodes (G,H) and spleens (I,J) of mice across different treatment groups on Day 30 (mean ± SEM, n = 5). K,L) The formation of MRSA colonies on LB-agar plates K) and the tally of surviving bacteria L) were documented on day 30. M) Conceptual representation of the mechanism by which Ta4C3 NSs prevent recurrent MRSA infections. Significance levels are marked as ns (not significant), *p < 0.05, **p < 0.01, ***p < 0.001, and ****p < 0.0001, as determined by one-way ANOVA.\u0000We apologize for this error.","PeriodicalId":228,"journal":{"name":"Small","volume":"15 1","pages":""},"PeriodicalIF":13.3,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143872716","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

Inhibiting Oxygen Activity and Phase Transition in Cu-F Doped Ni-Mn Layered Oxide Cathodes for Sodium-Ion Batteries 钠离子电池中Cu-F掺杂Ni-Mn层状氧化物阴极的氧活性和相变抑制

IF 13.3 2区材料科学

Small Pub Date : 2025-04-25 DOI: 10.1002/smll.202502292

Xilong Zhang, Fei Xie, Jinbao Han, Xuejie Wang, Tao Liu, Jiaguo Yu, Liuyang Zhang

{"title":"Inhibiting Oxygen Activity and Phase Transition in Cu-F Doped Ni-Mn Layered Oxide Cathodes for Sodium-Ion Batteries","authors":"Xilong Zhang, Fei Xie, Jinbao Han, Xuejie Wang, Tao Liu, Jiaguo Yu, Liuyang Zhang","doi":"10.1002/smll.202502292","DOIUrl":"https://doi.org/10.1002/smll.202502292","url":null,"abstract":"Sodium-ion batteries (SIBs) have emerged as a promising alternative for large-scale energy storage due to the abundance of sodium resources. Among cathode materials, layered oxides have shown exceptional potential, yet their practical application is hindered by structural instability during electrochemical cycling. In this study, this challenge is addressed by introducing a novel strategy of Cu and F dual doping into the octahedral ligand field of oxygen-activated P2-type Na0.67Ni0.33Mn0.67O2 layered oxides. Through a comprehensive suite of advanced characterization techniques, unprecedented insights into the modulation of oxygen redox activity are uncovered. Ex situ X-ray photoelectron spectroscopy and Raman spectroscopy reveal enhanced reversibility and stability in chemical bonding, while in situ X-ray diffraction analysis indicates the suppression of detrimental phase transitions, ensuring a stable and unobstructed Na+ diffusion pathway. Density functional theory calculations further elucidate that Cu-F co-doping reduces the overlap between Ni t2g orbitals and O 2p orbitals, thereby inhibiting oxygen redox activity. Remarkably, the co-doped material exhibits significantly improved capacity retention and rate performance. This work not only advances the fundamental understanding of octahedral ligand field engineering but also provides a transformative approach to designing high-performance and stable cathode materials for SIBs, paving the way for their widespread adoption in energy storage systems.","PeriodicalId":228,"journal":{"name":"Small","volume":"53 1","pages":""},"PeriodicalIF":13.3,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143872677","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

From Magnetoelectric Core–Shell Structure to Compound Eye-Inspired Metamaterials: Multiscale Design of Ultra-Wideband Electromagnetic Wave Absorber Device 从磁电核壳结构到复合眼启发超材料：超宽带电磁波吸收装置的多尺度设计

IF 13.3 2区材料科学

Small Pub Date : 2025-04-25 DOI: 10.1002/smll.202502186

Yusong Ma, Haoyu Zhao, Nian Luo, Feng Chen, Qiang Fu

{"title":"From Magnetoelectric Core–Shell Structure to Compound Eye-Inspired Metamaterials: Multiscale Design of Ultra-Wideband Electromagnetic Wave Absorber Device","authors":"Yusong Ma, Haoyu Zhao, Nian Luo, Feng Chen, Qiang Fu","doi":"10.1002/smll.202502186","DOIUrl":"https://doi.org/10.1002/smll.202502186","url":null,"abstract":"The integration of macroscopic and microscopic structural designs plays a crucial role in developing high-performance electromagnetic wave (EMW) absorber devices. In this work, an innovative metamaterial based on a multi-scale design is introduced to address the challenge of narrowband absorption. Specifically, at the microscopic scale, a highly efficient absorbing material (FCIP@SiO2@Ppy) is synthesized through an integrated optimization strategy, in which functional layers are uniquely combined to maximize performance. By leveraging heterogeneous interfaces, this design establishes a magneto-electric coupling network, ensuring excellent impedance matching and significantly enhancing the EMW absorption capacity of the material. Notably, the material achieves a record low reflection loss (RL) of −66.66 dB at 9.95 GHz with a broad absorption bandwidth of 5.92 GHz (RL ≤ −10 dB), which is subsequently used to fabricate metamaterial absorber device. Building upon this, at the macroscopic scale, inspired by the compound eye structure of arthropods, a groundbreaking metamaterial structure is proposed. Simulations reveal the achievement of ultra-wideband absorption (2.75–18 GHz) with a remarkably thin thickness of just 12 mm. These pioneering results present effective strategies for the development of next-generation high-performance EMW absorber devices.","PeriodicalId":228,"journal":{"name":"Small","volume":"14 1","pages":""},"PeriodicalIF":13.3,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143872684","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

Highly Crystalline and Robust Donor-Acceptor Type Covalent Organic Frameworks for Long-life Sodium-Ion Battery Cathodes 用于长寿命钠离子电池阴极的高结晶和坚固的供体-受体型共价有机框架

IF 13.3 2区材料科学

Small Pub Date : 2025-04-25 DOI: 10.1002/smll.202412698

Kun Kang, Ying Liu, Jiaqi Duan, Xue Tang, Yan Wang, Shiqi Zhang, Heng Wang, Jincan Cui, Xiaolei Yuan, Xu Deng, Ning Fu, Ben Yang, Jian-Yong Hu

{"title":"Highly Crystalline and Robust Donor-Acceptor Type Covalent Organic Frameworks for Long-life Sodium-Ion Battery Cathodes","authors":"Kun Kang, Ying Liu, Jiaqi Duan, Xue Tang, Yan Wang, Shiqi Zhang, Heng Wang, Jincan Cui, Xiaolei Yuan, Xu Deng, Ning Fu, Ben Yang, Jian-Yong Hu","doi":"10.1002/smll.202412698","DOIUrl":"https://doi.org/10.1002/smll.202412698","url":null,"abstract":"Covalent organic frameworks (COFs) hold great potential in sodium-ion battery cathodes. However, most reported COF-based electrodes show unsatisfying capacity and rate performance due to their limited redox site density, low crystallinity, and poor conductivity. Herein, a highly crystalline and robust donor-acceptor type COF with abundant redox active sites is developed by the polymerization of donor unit benzo[1,2-b:3,4-b″:5,6-b″']trithiophene-2,5,8-tricarbaldehyde) (BTT) and acceptor unit s-indacene-1,3,5,7(2H,6H)-tetrone (ICTO) (denoted as BTT-ICTO) for cathodic Na+ storage. The BTT-ICTO-graphene composites (BTT-ICTO@G) synthesized by in situ growth have a loose sheet structure with rough surfaces, contributing to the improved conductivity and active site utilization of BTT-ICTO. Benefiting from the robustness of BTT-ICTO linked by ethylene bonds, the BTT-ICTO@G cathodes exhibit a high capacity of 325 mAh g−1 at 0.1 A g−1 with a high active site utilization of 80%, excellent rate performance of 190 mAh g−1 at 5.0 A g−1, and exceptional cycle performances of 196 mAh g−1 over 10 000 cycles at 2.0 A g−1 with only 0.0015% decay per cycle. These properties make the BTT-ICTO@G cathodes among the best-reported COF-based sodium-ion battery cathodes. In addition, in situ Raman, ex situ Fourier transform infrared, and theoretical calculations disclose the reaction pathway of Na+ storage.","PeriodicalId":228,"journal":{"name":"Small","volume":"28 1","pages":""},"PeriodicalIF":13.3,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143872680","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

Design and Synthesis of N-Doped Porous Carbon Flowers with Enhanced Electromagnetic Wave Absorption 增强电磁波吸收的n掺杂多孔碳花的设计与合成

IF 13.3 2区材料科学

Small Pub Date : 2025-04-25 DOI: 10.1002/smll.202501239

Hao Xu, Yuye Dou, Xinrui Wang, Guangling He, Xia Li, Xuefeng Yan, Liangmin Yu

{"title":"Design and Synthesis of N-Doped Porous Carbon Flowers with Enhanced Electromagnetic Wave Absorption","authors":"Hao Xu, Yuye Dou, Xinrui Wang, Guangling He, Xia Li, Xuefeng Yan, Liangmin Yu","doi":"10.1002/smll.202501239","DOIUrl":"https://doi.org/10.1002/smll.202501239","url":null,"abstract":"Herein, a simple, innovative, and efficient method is presented for synthesizing an electromagnetic wave (EMW)-absorbing material with a distinctive flower–ball structure. Acrylonitrile (AN)–styrene binary polymer microspheres (PAS) serve as seeds for the deposition of AN, forming petal-like structures and yielding uniform polymer flower balls (PAS&A-F). Carbonization of these flower balls produces PAS&A carbon flowers (PAS&A-CF) with excellent EMW absorption properties. PAS&A-CF carbonized at 800 °C exhibits a minimum reflection loss of −54.0 dB at a thickness of 2.92 mm and an optimal effective absorption bandwidth of 4.01 GHz. This exceptional performance is attributed to the unique petal-like cross-stacked flower–ball morphology, porous structure, N and O atom doping, and an appropriate degree of graphitization. These characteristics synergistically enhance impedance matching, multiple scattering and reflection, dipole polarization, and conductive loss. This straightforward, innovative, and highly efficient preparation approach, with precise control over surface morphology and temperature, offers a novel approach for developing high-performance EMW-absorbing materials.","PeriodicalId":228,"journal":{"name":"Small","volume":"2 1","pages":""},"PeriodicalIF":13.3,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143872683","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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