IF 13.3 2区材料科学

Small Pub Date : 2025-06-27 DOI: 10.1002/smll.202502514

Weiliang Jin, Hongxin Jiang, Xuemei Liu, Shenghua Ma, Lina Zhu, Deming Kong

{"title":"Selective Capture of Scandium Ions by Designing Chelation Sites in Covalent Organic Framework Membranes","authors":"Weiliang Jin, Hongxin Jiang, Xuemei Liu, Shenghua Ma, Lina Zhu, Deming Kong","doi":"10.1002/smll.202502514","DOIUrl":"https://doi.org/10.1002/smll.202502514","url":null,"abstract":"The rational design of adsorbents capable of efficiently and selectively capturing target metal ions from complex matrices remains a significant challenge in the field of materials science. Herein, it is demonstrated that atomic‐level design of chelation sites within covalent organic frameworks (COFs) is a feasible strategy for achieving selective metal ion capture. This study presents a comprehensive approach that integrates theoretical predictions, structural design, and experimental validation to develop targeted metal ion‐specific absorbents. The synthesized β‐ketoenamine‐linked COFs, with tailored chelation sites, exhibit exceptional selectivity and enhanced adsorption capacities for scandium ions (Sc3+), an important rare metal, and selective separation of Sc3+ from complex multi‐metal ion solutions are realized using Janus membranes prepared from these tailored COFs. Mechanistic analysis reveals the critical roles of chelation coordination and electrostatic interactions in the selective adsorption process. This work represents a significant methodological advancement in utilizing chelating coordination for the structural design of COFs targeting metal ion capture, addressing the specific challenge of Sc3+ recovery and providing valuable insights into the development of selective adsorbents for other critical metal ions. These findings are promising for solving longstanding issues in resource recovery and environmental remediation.","PeriodicalId":228,"journal":{"name":"Small","volume":"1 1","pages":""},"PeriodicalIF":13.3,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144503701","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

Strategic Core‐Shell Integration for Advancing Z‐Scheme Heterojunctions: Interface‐Engineered ZnIn2S4/Ag2WO4@Ag Ternary Architecture for Enhanced Visible‐Light‐Driven Photocatalytic H2 Production and Pollutant Degradation 推进Z - Scheme异质结的战略性核壳集成：界面工程ZnIn2S4/Ag2WO4@Ag三元结构，用于增强可见光驱动的光催化H2生产和污染物降解

IF 13.3 2区材料科学

Small Pub Date : 2025-06-27 DOI: 10.1002/smll.202501833

Bharagav Urupalli, Dong‐Seog Kim, Gi‐Seung Shin, Geun‐Jae Oh, Tuong Van Tran, Ji‐Wook Yoon, Yeon‐Tae Yu

{"title":"Strategic Core‐Shell Integration for Advancing Z‐Scheme Heterojunctions: Interface‐Engineered ZnIn2S4/Ag2WO4@Ag Ternary Architecture for Enhanced Visible‐Light‐Driven Photocatalytic H2 Production and Pollutant Degradation","authors":"Bharagav Urupalli, Dong‐Seog Kim, Gi‐Seung Shin, Geun‐Jae Oh, Tuong Van Tran, Ji‐Wook Yoon, Yeon‐Tae Yu","doi":"10.1002/smll.202501833","DOIUrl":"https://doi.org/10.1002/smll.202501833","url":null,"abstract":"The spatial inhomogeneity of interfacial modifications, despite conventional approaches like co‐catalyst deposition and dopant incorporation, presents a critical bottleneck in achieving optimal charge carrier dynamics and sustained photocatalytic performance at semiconductor heterojunctions. To address this challenge, this study introduces a novel approach by encapsulating the wide‐bandgap semiconductor Ag2WO4 (AWO) in a particulate shell of plasmonic hot spots (metallic Ag), forming a well‐defined interface that facilitates consistent charge transfer and enhances photocatalytic efficiency. The engineered Ag2WO4@Ag (AWO@Ag) is strategically integrated with ZnIn2S4 (ZIS) nanosheets to design core–shell integrated Z‐scheme heterojunction. The optimized integration of AWO@Ag (12.5%) over ZIS nanosheets demonstrates a remarkable hydrogen generation performance, achieving 3142 µmol h−1g−1, surpassing the performance of pure ZnIn2S4 (1311 µmol h−1g−1). Through rational interface design with strong redox abilities, the system achieves an impressive methyl orange photodegradation efficiency of 97.16% within 60 min. Additionally, it exhibits photoanodic currents of 3.98 mA cm−2 at 2.2 V versus RHE in a neutral electrolytic medium, demonstrating enhanced water oxidation capability facilitated by AWO@Ag integration. The system's exceptional performance across hydrogen generation, dye degradation, and water oxidation, validates that this advanced structural design enables stable and sustained photocatalytic performance through its multifunctional properties.","PeriodicalId":228,"journal":{"name":"Small","volume":"13 1","pages":""},"PeriodicalIF":13.3,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144503707","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

Comprehensive Optical Band-Edge Characterization for Multilayered MoTe2 and Its Application in van der Waals-Stacked Heterojunction Devices. 多层MoTe2的综合光学带边特性及其在范德华堆叠异质结器件中的应用。

IF 13.3 2区材料科学

Small Pub Date : 2025-06-26 DOI: 10.1002/smll.202503542

Yin-Chou Huang,Dai-Yan Yang,Luthviyah Choirotul Muhimmah,Yu-Hung Peng,Yen-Chang Su,Ching-Hwa Ho

{"title":"Comprehensive Optical Band-Edge Characterization for Multilayered MoTe2 and Its Application in van der Waals-Stacked Heterojunction Devices.","authors":"Yin-Chou Huang,Dai-Yan Yang,Luthviyah Choirotul Muhimmah,Yu-Hung Peng,Yen-Chang Su,Ching-Hwa Ho","doi":"10.1002/smll.202503542","DOIUrl":"https://doi.org/10.1002/smll.202503542","url":null,"abstract":"MoTe2 is considered a promising 2D material for solar energy and optoelectronic applications owing to its suitable bandgap value and specific excitonic behaviors. However, its band-edge and excitonic transitions have not been fully elucidated. In this study, micro-thermoreflectance (µTR) spectroscopy results show that multilayered 2H-MoTe2 exhibits multiple excitonic features, including A1s, B1s, A', C, D, E, F, and G excitons, as well as one indirect-gap related feature, observed in a 500 nm-thick nanoflake at 300 K. Thickness-dependent micro-photoluminescence (µPL) measurement reveals that the PL emission is undetectable at a thickness of ≈40 nm (56 layers), but it is initially detected at 0.944 eV for a thinner thickness of ≈20 nm (28 layers), and finally, it shifts to 1.042 eV and presents the highest PL intensity when the thickness decreases to 5 nm (7 layers). Density functional theory (DFT) band structure calculations reveal that monolayer MoTe2 is a direct semiconductor with the highest bandgap, which diminishes and finally converts to an indirect band with at ≈45 layers, nearly consistent with the thickness-dependent µPL results. From the DFT calculations, the A1s, B1s, A', C, D, E, F, and G band-edge exciton features in the µTR spectra of multilayered MoTe2 are verified and assigned. Additionally, a prototype p-SnS/n-MoTe2 stacking heterojunction device is fabricated. The built-in potential of the heterojunction diode is ≈0.62 V, matching well with the measured work function difference between the two heterojunction materials.","PeriodicalId":228,"journal":{"name":"Small","volume":"10 1","pages":"e2503542"},"PeriodicalIF":13.3,"publicationDate":"2025-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144488080","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

Engineered CeO2@Ru Nanospheres via Size-Metal-Loading Synergy to Enhance Chemiluminescence Efficiency for Sensitive Immunochromatographic Assay. 工程CeO2@Ru纳米球通过大小-金属负载协同作用，以提高化学发光效率的敏感免疫层析分析。

IF 13.3 2区材料科学

Small Pub Date : 2025-06-26 DOI: 10.1002/smll.202503909

Changwei Luo,Mengzhuo Fan,Mengtian Chen,Yexuan Mao,Meng Dang,Xianqing Huang,Lianjun Song,Tong Bu,Xiya Zhang

{"title":"Engineered CeO2@Ru Nanospheres via Size-Metal-Loading Synergy to Enhance Chemiluminescence Efficiency for Sensitive Immunochromatographic Assay.","authors":"Changwei Luo,Mengzhuo Fan,Mengtian Chen,Yexuan Mao,Meng Dang,Xianqing Huang,Lianjun Song,Tong Bu,Xiya Zhang","doi":"10.1002/smll.202503909","DOIUrl":"https://doi.org/10.1002/smll.202503909","url":null,"abstract":"Exploring chemiluminescence-based immunochromatographic assay (CLICA) is favorable for sensitive point-of-care testing, yet inefficient CL efficiency (ΦCL) and poor visualization hinder the progress of CLICA. Herein, CeO2@Ru nanospheres (CeO2@RuNSs) are engineered through a \"Size-Metal-Loading\" synergistic tactic to significantly enhance ΦCL in luminol-H2O2-based CLICA for sensitive ochratoxin A (OTA) detection. As the core of the sensor, the structure-ΦCL relationship of CeO2@RuNSs is systematically explored through size regulation, metal deposition, and loading optimization. Systematic studies reveal that large-sized CeO2 exhibits superior peroxidase-like activity among three particle sizes, and subsequent Ru doping coupled with loading regulation synergistically boost catalytic performance, achieving an 8.3-fold higher ΦCL (10.59×10-3 einsteins/mol) compared to small-sized CeO2. Furthermore, the CeO2@RuNSs-labeled antibodies serve as probes to construct CLICA with preeminent intensity, while the CL system components are carefully optimized for effective visualization. Impressively, a portable detection device is designed by the integration of CeO2@RuNSs-CLICA with a smartphone-based readout. After optimization, the detection limit of this CLICA can reach as low as 0.06 ng mL-1, which is much lower than that of traditional gold nanoparticle-based ICA (0.23 ng mL-1), with admirable specificity and reproducibility. Ultimately, the sensor performs well in wheat and barley samples with satisfactory recovery rates (92.1%-114.9%).","PeriodicalId":228,"journal":{"name":"Small","volume":"46 1","pages":"e2503909"},"PeriodicalIF":13.3,"publicationDate":"2025-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144488135","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

Microstructure and Microenvironment Regulation of Covalent Organic Frameworks for Electrochemical CO2 Reduction Reaction. 电化学CO2还原反应中共价有机骨架的微观结构及微环境调控

IF 13.3 2区材料科学

Small Pub Date : 2025-06-26 DOI: 10.1002/smll.202505018

Yiming Zou,Huijun Zhu,Lei Feng,Danni Shi,Zekai Zhu,Yuying Meng,Qingsheng Gao

{"title":"Microstructure and Microenvironment Regulation of Covalent Organic Frameworks for Electrochemical CO2 Reduction Reaction.","authors":"Yiming Zou,Huijun Zhu,Lei Feng,Danni Shi,Zekai Zhu,Yuying Meng,Qingsheng Gao","doi":"10.1002/smll.202505018","DOIUrl":"https://doi.org/10.1002/smll.202505018","url":null,"abstract":"The growing energy crisis and environmental concerns have drawn significant attention to the electrochemical CO2 reduction reaction (eCO2RR), which can directly convert CO2 into high-value-added chemicals. Covalent organic frameworks (COFs) featured with their distinctive pore structures and chemical tunability have demonstrated promise for CO2 conversion. The current research mainly focuses on the macroscopic regulation of COFs, exploring their applications in eCO2RR through synthesis methods, conductivity optimization, structural modification, etc. However, the critical role of the microstructure and microenvironment in modulating catalytic performance remains unexplored. This review comprehensively summarizes the recent advances in optimizing the eCO2RR performance of COF-based materials via the microstructure and microenvironment engineering at the active sites, including precise control of charge distribution and adsorbed species concentration. Various strategies such as ligand engineering, linkage engineering, and substituent effect have been introduced to tune the local electron density and improve their charge distribution, thereby enhancing the catalytic activity. Furthermore, how selective adsorption of specific anions and cations on the active site alters the adsorption energy of key intermediates is highlighted, steering the reaction pathway. Finally, the current challenges in COFs for eCO2RR are outlined and potential solutions providing valuable insights for the rational design of next-generation COF electrocatalysts are proposed.","PeriodicalId":228,"journal":{"name":"Small","volume":"653 1","pages":"e2505018"},"PeriodicalIF":13.3,"publicationDate":"2025-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144488088","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

Strong Polarization-Tuned Optical Nonlinearity Via Femtosecond-Laser Plasmonic Nanolithography in Lithium Niobate (Small 25/2025) 利用飞秒激光等离子体纳米光刻技术研究铌酸锂的强偏振调谐光学非线性（Small 25/2025）

IF 13 2区材料科学

Small Pub Date : 2025-06-26 DOI: 10.1002/smll.202570199

Han Zhu, Wenqing Sun, Lingrui Chu, Shengqiang Zhou, Tianci Wu, Qingchuan Ye, Xiaoli Sun, Saulius Juodkazis, Feng Chen

引用次数: 0

Stabilized Co Single-Atom Catalyst via Ion Implantation for Efficient Hydrogen Production. 离子注入稳定Co单原子催化剂用于高效制氢。

IF 13.3 2区材料科学

Small Pub Date : 2025-06-26 DOI: 10.1002/smll.202505383

Jaerim Kim,Sung-Hyuk Her,Dong-Seok Kim,Bongwon Kim,Sang-Mun Jung,Jiye Kim,Hyeonwoong Hwang,Kyu-Su Kim,Yong-Tae Kim,Si-Young Choi,Jong Kyu Kim

{"title":"Stabilized Co Single-Atom Catalyst via Ion Implantation for Efficient Hydrogen Production.","authors":"Jaerim Kim,Sung-Hyuk Her,Dong-Seok Kim,Bongwon Kim,Sang-Mun Jung,Jiye Kim,Hyeonwoong Hwang,Kyu-Su Kim,Yong-Tae Kim,Si-Young Choi,Jong Kyu Kim","doi":"10.1002/smll.202505383","DOIUrl":"https://doi.org/10.1002/smll.202505383","url":null,"abstract":"Although single-atom catalysts (SACs) are garnering significant attention due to their exceptional catalytic properties, the synthesis of SACs remains challenging due to their thermodynamic instability. Herein, stabilized Co-based SACs enabled by the ion implantation technique are presented. It is revealed that implantation of Co ions with an accelerating energy of 120 keV and a controlled fluence not only leads to the formation of stabilized Co single atoms without notable aggregation of Co atoms into nanoclusters, but also induces the creation of defects in the NiO support, such as oxygen vacancies. With the effect of atomically dispersed Co metals over the defective NiO support, the Co single atom-supported NiO catalyst exhibits excellent electrocatalytic performance for hydrogen evolution reaction, showing significantly improved activity as well as stability with negligible catalytic degradation during long-term operation. Cu, Ni, and Fe-based SACs are further successfully synthesized, demonstrating that the ion implantation technique is a universal strategy for the synthesis of SACs with a wide variety of combinations of available metal atoms and supporting materials. This finding can pave the way for the development of stabilized SACs toward efficient and practical sustainable energy conversion systems that are based on various catalytic reactions.","PeriodicalId":228,"journal":{"name":"Small","volume":"52 1","pages":"e2505383"},"PeriodicalIF":13.3,"publicationDate":"2025-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144488087","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

Microstructural Engineering of Conductive MOF Nanocrystals for Multifunctional Heterostructures. 多功能异质结构导电MOF纳米晶的微结构工程。

IF 13.3 2区材料科学

Small Pub Date : 2025-06-26 DOI: 10.1002/smll.202504112

Jae Seo Park,Seo Mi Yang,Dongyoun Park,Young Joon Park,Ye Jin Sim,Hye Ji Nam,So Eun Kim,Jae Ho Kim,Seung Jae Yang

{"title":"Microstructural Engineering of Conductive MOF Nanocrystals for Multifunctional Heterostructures.","authors":"Jae Seo Park,Seo Mi Yang,Dongyoun Park,Young Joon Park,Ye Jin Sim,Hye Ji Nam,So Eun Kim,Jae Ho Kim,Seung Jae Yang","doi":"10.1002/smll.202504112","DOIUrl":"https://doi.org/10.1002/smll.202504112","url":null,"abstract":"Conductive metal-organic frameworks (cMOFs) have emerged as transformative materials, significantly expanding the functional landscape of conventional MOFs by integrating electrical conductivity. Despite this, harnessing their full potential in heterostructured architectures is constrained by challenges in finely tuning the critical structural parameters, notably the packing density and crystallographic orientation. This paper introduces an innovative approach to engineering the microstructure of cMOFs as conformal shell-enveloping spherical nanoparticles. The compactness of the cMOF layer is modulated by the crystallization kinetics, while a deliberate seeding process directed the alignment of cMOF nanocrystallites. These methodologies collectively facilitated the formation of densely packed, highly ordered nanocrystallite assemblies in a core-shell configuration, enhancing mechanical robustness, selective permeability, and electron transport. The resulting cMOF assembly markedly augmented the stability and electrochemical performance of the sulfur core, showing significant promise as a next-generation cathode material for lithium-sulfur batteries.","PeriodicalId":228,"journal":{"name":"Small","volume":"54 1","pages":"e2504112"},"PeriodicalIF":13.3,"publicationDate":"2025-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144488137","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

Enhancement of Photoluminescence Quantum Yield of Silver Clusters by Heavy Atom Effect (Small 25/2025) 重原子效应增强银团簇光致发光量子产率（Small 25/2025）

IF 13 2区材料科学

Small Pub Date : 2025-06-26 DOI: 10.1002/smll.202570198

Aoi Akiyama, Sakiat Hossain, Yoshiki Niihori, Kazutaka Oiwa, Jayoti Roy, Tokuhisa Kawawaki, Thalappil Pradeep, Yuichi Negishi

引用次数: 0

Deciphering Electrocatalytic Activity in Cu Nanoclusters: Interplay Between Structural Confinement and Ligands Environment (Small 25/2025) 破译铜纳米团簇的电催化活性：结构约束和配体环境之间的相互作用（Small 25/2025）

IF 13 2区材料科学

Small Pub Date : 2025-06-26 DOI: 10.1002/smll.202570197

Sourav Biswas, Yamato Shingyouchi, Maho Kamiyama, Milan Kumar Jena, Masaki Ogami, Tokuhisa Kawawaki, Biswarup Pathak, Yuichi Negishi

引用次数: 0

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