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Polycalmagite Coating Enables Long-Term Alkaline Seawater Oxidation Over NiFe Layered Double Hydroxide

IF 13.3 2区材料科学

Small Pub Date : 2025-01-21 DOI: 10.1002/smll.202408642

Zixiao Li, Wei Zuo, Chaozhen Liu, Chaoxin Yang, Zhengwei Cai, Shengjun Sun, Meng Yue, Min Zhang, Xiaoyan Wang, Hefeng Wang, Dongdong Zheng, Asmaa Farouk, Fatma A. Ibrahim, Feng Gong, Yanqin Lv, Xuping Sun, Bo Tang

{"title":"Polycalmagite Coating Enables Long-Term Alkaline Seawater Oxidation Over NiFe Layered Double Hydroxide","authors":"Zixiao Li, Wei Zuo, Chaozhen Liu, Chaoxin Yang, Zhengwei Cai, Shengjun Sun, Meng Yue, Min Zhang, Xiaoyan Wang, Hefeng Wang, Dongdong Zheng, Asmaa Farouk, Fatma A. Ibrahim, Feng Gong, Yanqin Lv, Xuping Sun, Bo Tang","doi":"10.1002/smll.202408642","DOIUrl":"https://doi.org/10.1002/smll.202408642","url":null,"abstract":"Renewable energy-powered seawater electrolysis is a green and attractive technique for producing high-purity hydrogen. However, severe chlorideions (Cl−) and their derivatives tend to corrode anodic catalysts at ampere-level current densities and hinder the application of seawater-to-H2 systems. Herein, a polycalmagite (PCM)-coated NiFe layered double hydroxide is presented on Ni foam (NiFe LDH@PCM/NF) that exhibits exceptional stability in alkaline seawater. PCM not only acts as a conductive layer to reduce charge transfer resistance of the anodes but also as a polymer-based protective layer to inhibit Cl− adsorption and stabilize metal ions oxidation due to its own anions and strong adhesion, thereby increasing activity and stability during alkaline seawater. Thus, NiFe LDH@PCM/NF only needs a low overpotential of 364 mV to reach up to 1000 mA cm−2 and maintains operation for 500 h without activity degradation. Moreover, a minimal amount of hypochlorite can be detected in electrolyte after a 500-h stability test. This development affords a significant exploration in creating durable and efficient anodes, highlighting the importance of polymer coating toward anti-corrosion in alkaline seawater oxidation.","PeriodicalId":228,"journal":{"name":"Small","volume":"46 1","pages":""},"PeriodicalIF":13.3,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142992416","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

Capturing Conformational Transitions of Fluorescently-Coupled Polyelectrolyte Brushes with High Spatiotemporal Resolution

IF 13.3 2区材料科学

Small Pub Date : 2025-01-21 DOI: 10.1002/smll.202409323

Jyoti Yadav, Ilka Hermes, Andreas Fery, Quinn A. Besford

{"title":"Capturing Conformational Transitions of Fluorescently-Coupled Polyelectrolyte Brushes with High Spatiotemporal Resolution","authors":"Jyoti Yadav, Ilka Hermes, Andreas Fery, Quinn A. Besford","doi":"10.1002/smll.202409323","DOIUrl":"https://doi.org/10.1002/smll.202409323","url":null,"abstract":"Polyelectrolyte brushes (PEBs) undergo conformational transitions due to changes in pH and/or ionic strength, which is leveraged as smart surfaces and on-demand drug-release systems. However, probing conformational transitions of functional PEBs has remained challenging due to low spatiotemporal resolution of characterization methods. Herein, fluorescently-coupled PEBs are devised that give rise to Förster Resonance Energy Transfer (FRET) intrinsically coupled to conformational transitions of chains. Polyelectrolyte poly(2-(dimethylamino)ethyl methacrylate) brushes are grown on silica surfaces via a grafting-from approach, producing nanoscale brushes ≈60 nm in solvated height. The study chose to investigate pH as astimulus, at constant ionic strength, using pH-insensitive fluorophores coupled within the brush (donors) and on-chain ends (acceptors), leading to conformational FRET. The influence of pH on the FRET brushes is proved by ellipsometry and fluorescence spectroscopy. Importantly, using FRET meant chain conformation is spatially resolved with sub-micrometer resolution by confocal laser scanning microscopy, where subtle changes in brush conformation are resolved in seconds. Unique mixing dynamics of different pH microdroplets on the brushes are identified as coalescence occurred, with reversible output, and a clear delay in brush responses to mixing liquids. The surfaces offer a new basis for probing conformational transitions of PEBs with high spatiotemporal resolution.","PeriodicalId":228,"journal":{"name":"Small","volume":"33 1","pages":""},"PeriodicalIF":13.3,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142992404","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

‘Crown-Roots’ Structure Formed by Lignin-Containing Cellulose Nanofibers for All-Natural, Biorenewable Barrier Material

IF 13.3 2区材料科学

Small Pub Date : 2025-01-21 DOI: 10.1002/smll.202407438

Xunhong Gu, Wanhua Wang, Jinyu Kang, Xinrui Dong, Peilin Guan, Bo Li

{"title":"‘Crown-Roots’ Structure Formed by Lignin-Containing Cellulose Nanofibers for All-Natural, Biorenewable Barrier Material","authors":"Xunhong Gu, Wanhua Wang, Jinyu Kang, Xinrui Dong, Peilin Guan, Bo Li","doi":"10.1002/smll.202407438","DOIUrl":"https://doi.org/10.1002/smll.202407438","url":null,"abstract":"Degradable and cost-effective cellulose fiber-based materials are ideal substitutes for traditional plastics. However, organic additives used to enhance water and oil resistance often contain toxic substances that may migrate into food, posing health risks. In this study, inspired by tree structures, lignin-containing cellulose nanofibers (LCNFs) are used to form a “crown-roots” structure to enhance the water, oil, and gas resistance, as well as mechanical performance of composites. Mechanically fibrillated LCNFs (M-LCNFs), representing the tree roots, are blended with bamboo pulp and bagasse pulp to prepare cellulose fiber substrate. LCNFs films, representing the crown, are produced via a sol–gel method to improve the substrate's barrier properties. The LCNFs gel, representing the trunk, bonds the films to the substrate via hydrogen bond. The resulting material shows exceptional behaviors including 1) excellent water and oil resistance (Cobb value and WVTR decreased by 75.27% and 16.43% compared to the substrate, with a maximum kit value of 12), 2) outstanding mechanical performance (tensile index is 103.19 N·m g−1), and 3) good natural degradability. This material holds significant potential for industries with high safety standards, such as food, cosmetics, and medicine.","PeriodicalId":228,"journal":{"name":"Small","volume":"25 1","pages":""},"PeriodicalIF":13.3,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142992408","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

2D Van der Waals Sliding Ferroelectrics Toward Novel Electronic Devices

IF 13.3 2区材料科学

Small Pub Date : 2025-01-21 DOI: 10.1002/smll.202408375

Chunyan Wang, Yaxue Zhang, Dachuan Zhang, Yu Sun, Tao Zhang, Jing Li

{"title":"2D Van der Waals Sliding Ferroelectrics Toward Novel Electronic Devices","authors":"Chunyan Wang, Yaxue Zhang, Dachuan Zhang, Yu Sun, Tao Zhang, Jing Li","doi":"10.1002/smll.202408375","DOIUrl":"https://doi.org/10.1002/smll.202408375","url":null,"abstract":"Ferroelectric materials, celebrated for their switchable polarization, have undergone significant evolution since their early discovery in Rochelle salt. Initial challenges, including water solubility and brittleness, are overcome with the development of perovskite ferroelectrics, which enable the creation of stable, high-quality thin films suitable for semiconductor applications. As the demand for miniaturization in nanoelectronics has increased, research has shifted toward low-dimensional materials. Traditional ferroelectrics often lose their properties at the nanoscale; however, 2D van der Waals (vdW) ferroelectrics, including CuInP2S6 and α-In2Se3, have emerged as promising alternatives. The recent discovery of sliding ferroelectricity, where polarization is linked to the polar stacking configuration of originally non-polar monolayers, has significantly broadened the scope of 2D ferroelectrics. This review offers a comprehensive examination of stacking orders in 2D vdW materials, stacking-order-linked ferroelectric polarization structures, and their manifestations in metallic, insulating and semiconducting 2D vdW materials. Additionally, it explores the applications of 2D vdW sliding ferroelectrics, and discusses the future prospects in nanotechnology.","PeriodicalId":228,"journal":{"name":"Small","volume":"21 1","pages":""},"PeriodicalIF":13.3,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142992702","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

In Situ Slow-Release Hydrogen Sulfide Therapeutics for Advanced Disease Treatments

IF 13.3 2区材料科学

Small Pub Date : 2025-01-21 DOI: 10.1002/smll.202410909

Yiqing Chen, Zhishan Chen, Xingzhong Chen, Shizhen Zhang, Shaoan Zhang, Qiyun Kang, Kaniyarakkal Sharafudeen, Huiwang Lian, Subramanian Saravanakumar, Xinyue Zhang, Jialong Xu, Xiaoqin Zhu, Qingbin Zhang, Gang Han, Yang Li

{"title":"In Situ Slow-Release Hydrogen Sulfide Therapeutics for Advanced Disease Treatments","authors":"Yiqing Chen, Zhishan Chen, Xingzhong Chen, Shizhen Zhang, Shaoan Zhang, Qiyun Kang, Kaniyarakkal Sharafudeen, Huiwang Lian, Subramanian Saravanakumar, Xinyue Zhang, Jialong Xu, Xiaoqin Zhu, Qingbin Zhang, Gang Han, Yang Li","doi":"10.1002/smll.202410909","DOIUrl":"https://doi.org/10.1002/smll.202410909","url":null,"abstract":"Hydrogen sulfide (H2S) gas therapygarners significant attention for its potential to improve outcomes in various disease treatments. The quantitative control of H2S release is crucial for effective the rapeutic interventions; however, traditional researchon H2S therapy frequently utilizes static release models and neglects the dynamic nature of blood flow. In this study, we propose a novel slow-release in-situ H2S release model that leverages the dynamic hydrolysis of H2S donorswithin the bloodstream. Calcium sulfide nanoparticles (CaS NPs) withmicrosolubility characteristics exhibit continuous H2S release, surpassing 24 h at normal blood flow velocities. The extended-release profile demonstrates superior potential in aligning with the bell-shapedpharmacological effect of H2S, compared to NaHS. Moreover, we synthesisedrare earth-doped CaS NPs (CaS: Eu2+, Sm3+ NPs) tha texhibit persistent luminescence, enabling visualisation of the continuous H2S release in trials. Our results demonstrate that lowdose CaS: Eu2+, Sm3+ NPs significantly reduces seizureduration to 1.2 ± 0.7 minutes, while high dose effectively suppresses colontumor growth with a tumor inhibition rate of 54%. Remarkably, these findings closely resemble endogenous H2S levels in treating epilepsy and tumors. This innovative slow-release, in-situ H2S the rapeutic approach via hydrolysis rejuvenates the development of H2S-basedtherapeutics.","PeriodicalId":228,"journal":{"name":"Small","volume":"8 1","pages":""},"PeriodicalIF":13.3,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142992410","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

CRISPR/Cas13a-Enhanced Porous Hydrogel Encapsulated Photonic Barcodes for Multiplexed Detection of Virus

IF 13.3 2区材料科学

Small Pub Date : 2025-01-21 DOI: 10.1002/smll.202408725

Dagan Zhang, Yuanyang Zhou, Xueqin Li, Qichen Luan

{"title":"CRISPR/Cas13a-Enhanced Porous Hydrogel Encapsulated Photonic Barcodes for Multiplexed Detection of Virus","authors":"Dagan Zhang, Yuanyang Zhou, Xueqin Li, Qichen Luan","doi":"10.1002/smll.202408725","DOIUrl":"https://doi.org/10.1002/smll.202408725","url":null,"abstract":"In this study, we present an ultrasensitive and specific multiplexed detection method for SARS-CoV-2 and influenza (Flu) utilizing CRISPR/Cas13a technology combined with a hydrogel-encapsulated photonic crystal (PhC) barcode integrated with hybridization chain reaction (HCR). The barcodes, characterized by core-shell structures, are fabricated through partial replication of periodically ordered hexagonally close-packed silicon dioxide beads. Consequently, the opal hydrogel shell of these barcodes features abundant interconnected pores that provide a substantial surface area for probe immobilization. Furthermore, the inherent structural colors remain stable during detection events due to the robust mechanical strength of the barcode cores. This integration of CRISPR/Cas13a and HCR leverages both the highly specific RNA recognition capabilities and trans-cleavage activity of Cas13a while employing HCR to enhance sensitivity. Upon encountering target RNA, Cas13a cleaves a hairpin probe, thereby initiating subsequent HCR amplification for enhanced detection sensitivity. Our method demonstrates high accuracy and sensitivity in multiplexed detection of SARS-CoV-2, Flu A and Flu B RNA with a limit-of-detection as low as 200 aM. Importantly, this assay also exhibits acceptable accuracy in repeated clinical sample testing. Thus, our platform represents a promising strategy for highly sensitive multiplexed virus detection in clinical.","PeriodicalId":228,"journal":{"name":"Small","volume":"27 1","pages":""},"PeriodicalIF":13.3,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142992412","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 Microwave-Strengthened Supramolecular Adhesive: from Flexible Pressure Sensitive Bonding to Strong and Muti-Reusable Hot Melt Bonding

IF 13.3 2区材料科学

Small Pub Date : 2025-01-21 DOI: 10.1002/smll.202412251

Yuquan Li, Siyuan Liu, Jiang-Fei Xu, Xi Zhang

{"title":"A Microwave-Strengthened Supramolecular Adhesive: from Flexible Pressure Sensitive Bonding to Strong and Muti-Reusable Hot Melt Bonding","authors":"Yuquan Li, Siyuan Liu, Jiang-Fei Xu, Xi Zhang","doi":"10.1002/smll.202412251","DOIUrl":"https://doi.org/10.1002/smll.202412251","url":null,"abstract":"A microwave-strengthened supramolecular adhesive by introducing maleic acid amide bonds into the cross-linked networks of catechol-based monomers and iron oxide nanoparticles is reported. Under microwave irradiation, the supramolecular adhesive can be rapidly heated up, causing the transformation from maleic acid amide bonds to maleimide bonds and thus the increase of its cohesive strength. The supramolecular adhesive can flexibly bond substrates like pressure sensitive adhesives during the bonding procedure and shows an adhesion strength of 0.5 MPa toward ceramic. After microwave strengthening, it can strongly bond substrates like hot melt adhesives and shows a dramatically increased adhesion strength of 5.0 MPa, 10 times stronger than the original value. Moreover, the microwave-strengthened supramolecular adhesive can be reused 3 times with negligible loss in adhesion strength, exhibiting outstanding multiple reusability. By combining both high flexibility and high adhesion strength, it is anticipated that the supramolecular adhesive can be of great potential in cultural relics restoration and microelectronics.","PeriodicalId":228,"journal":{"name":"Small","volume":"137 1","pages":""},"PeriodicalIF":13.3,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142992414","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-Performance Ultraviolet Photodetector Based on the Vertical GaSe/GaN Heterojunction

IF 13.3 2区材料科学

Small Pub Date : 2025-01-21 DOI: 10.1002/smll.202407473

Yujing Wang, Jiawei Chen, Tiangui Hu, Yuqing Huang, Wenkai Zhu, Weihao Li, Yin Hu, Zhongming Wei, Zhongchao Fan, Lixia Zhao, Kaiyou Wang

引用次数: 0

Toward Green and Sustainable Zinc-Ion Batteries: The Potential of Natural Solvent-Based Electrolytes

IF 13.3 2区材料科学

Small Pub Date : 2025-01-21 DOI: 10.1002/smll.202411478

Gulsah Yaman Uzunoglu, Recep Yuksel

{"title":"Toward Green and Sustainable Zinc-Ion Batteries: The Potential of Natural Solvent-Based Electrolytes","authors":"Gulsah Yaman Uzunoglu, Recep Yuksel","doi":"10.1002/smll.202411478","DOIUrl":"https://doi.org/10.1002/smll.202411478","url":null,"abstract":"Zinc-ion batteries (ZIBs) are emerged as a promising alternative for sustainable energy storage, offering advantages such as safety, low cost, and environmental friendliness. However, conventional aqueous electrolytes in ZIBs face significant challenges, including hydrogen evolution reaction (HER) and zinc dendrite formation, compromising their cycling stability and safety. These limitations necessitate innovative electrolyte solutions to enhance ZIB performance while maintaining sustainability. This review explores the potential of natural solvent-based electrolytes derived from renewable and biodegradable resources. Natural deep eutectic solvents (DES), bio-ionic liquids, and biomass-derived organic compounds present unique advantages, including a wider electrochemical stability window, reduced HER activity, and controlled zinc deposition. Examples include DESs based on choline chloride (ChCl), glycerol-based systems, and biomass-derived solvents such as γ-valerolactone (GVL) and aloe vera, demonstrating improved cycling stability and dendrite suppression. Despite their promise, challenges such as high viscosity, cost, and scalability remain critical barriers to commercialization. This review underscores the need for further research to optimize natural solvent formulations, enhance Zn anode compatibility, and integrate these systems into practical applications. By addressing these challenges, natural solvent-based electrolytes can pave the way for safer, high-performance, and environmentally sustainable ZIBs, particularly large-scale energy storage systems.","PeriodicalId":228,"journal":{"name":"Small","volume":"12 1","pages":""},"PeriodicalIF":13.3,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142992705","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

Semi-Confinement Effect Enhances CH4 and C2H4 Production in CO2 Electrocatalytic Reduction

IF 13.3 2区材料科学

Small Pub Date : 2025-01-21 DOI: 10.1002/smll.202411491

Jiahao Song, Hanlei Sun, Shuo Yao, Ziyong Liu, Ming Lv, Fuli Li, Zhihui Lv, Xinming Hu, Hongzhi Wang, Licheng Liu

{"title":"Semi-Confinement Effect Enhances CH4 and C2H4 Production in CO2 Electrocatalytic Reduction","authors":"Jiahao Song, Hanlei Sun, Shuo Yao, Ziyong Liu, Ming Lv, Fuli Li, Zhihui Lv, Xinming Hu, Hongzhi Wang, Licheng Liu","doi":"10.1002/smll.202411491","DOIUrl":"https://doi.org/10.1002/smll.202411491","url":null,"abstract":"Achieving fast conversion and precise regulation of product selectivity in electrochemical CO2 reduction reaction (CO2RR) remains a challenge. The space confinement effect provides a theoretical basis for the design of catalysts of different morphology and sizes and reveals the physical phenomena caused by the confinement of electrons and other particles at the nanoscale. In this work, a semi-confinement concept is introduced and a mesoporous silica nanosphere supported Cu catalyst (Cu-MSN) is prepared as a typical example to realize CO2RR enhancement and product selectivity regulation (methane vs ethylene). The semi-confined structure partially solves the mass transfer problem of classical confined catalysis. Cu-MSN allows flexible controls aggregation form of Cu species by loading amount, which achieves a free switch from methane Faraday efficiency of 71.1% to ethylene Faraday efficiency of 66.4%. Various characterizations confirm that the fast adsorption behavior and local coordination structure transformation of Cu (from Cu─O─Si to Cu─O─Cu), which can stabilize key intermediates *CHO and *CO*COH for generating respective methane and ethylene.","PeriodicalId":228,"journal":{"name":"Small","volume":"24 1","pages":""},"PeriodicalIF":13.3,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142992707","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