Small Methods最新文献

Dimeric DNA Aptamers for the Spike Protein of SARS-CoV-2 Derived from a Structured Library with Dual Random Domains.

IF 10.7 2区材料科学

Small Methods Pub Date : 2024-12-20 DOI: 10.1002/smtd.202401600

Ryan Amini, Jian Ma, Zijie Zhang, Qing Wang, Jimmy Gu, Leyla Soleymani, Yingfu Li

{"title":"Dimeric DNA Aptamers for the Spike Protein of SARS-CoV-2 Derived from a Structured Library with Dual Random Domains.","authors":"Ryan Amini, Jian Ma, Zijie Zhang, Qing Wang, Jimmy Gu, Leyla Soleymani, Yingfu Li","doi":"10.1002/smtd.202401600","DOIUrl":"https://doi.org/10.1002/smtd.202401600","url":null,"abstract":"Multimeric aptamer strategies are often adopted to improve the binding affinity of an aptamer toward its target molecules. In most cases, multimeric aptamers are constructed by connecting pre-identified monomeric aptamers derived from in vitro selection. Although multimerization provides an added benefit of enhanced binding avidity, the characterization of different aptamer pairings adds more steps to an already lengthy procedure. Therefore, an aptamer engineering strategy that directly selects for multimeric aptamers is highly desirable. Here, an in vitro selection strategy is reported on using a pre-structured DNA library that forms dimeric aptamers. Rather than using a library containing a single random region, which is nearly ubiquitous in existing aptamer selections, the library contains two random regions separated by a flexible poly-thymidine linker. Following sixteen rounds of selection against the SARS-CoV-2 spike protein, a relevant model target protein due to the COVID-19 pandemic, the top aptamers displayed superb affinity with KD values as low as 150 pM. Further analysis reveals that each random region functions as a distinct binding moiety and works together to achieve higher affinity. The demonstrated strategy provides an accelerated method to obtain high-affinity aptamers, which may prove useful in future aptamer diagnostic and therapeutic applications.","PeriodicalId":229,"journal":{"name":"Small Methods","volume":" ","pages":"e2401600"},"PeriodicalIF":10.7,"publicationDate":"2024-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142862715","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

Photonic Inks with Dual-Layer Security Features by Encapsulation of Color Tunable Fluorescent Dyes in PMMA Colloidal Microspheres.

IF 10.7 2区材料科学

Small Methods Pub Date : 2024-12-19 DOI: 10.1002/smtd.202402125

Lekshmi Lekshmanan, Adarsh S Pillai, Meghana M Thomas, Priyanka A Sukumaran, Safna Saif, Priya R Thankamani, Kuzhichalil P Surendran, Saju Pillai, Ayyappanpillai Ajayaghosh

{"title":"Photonic Inks with Dual-Layer Security Features by Encapsulation of Color Tunable Fluorescent Dyes in PMMA Colloidal Microspheres.","authors":"Lekshmi Lekshmanan, Adarsh S Pillai, Meghana M Thomas, Priyanka A Sukumaran, Safna Saif, Priya R Thankamani, Kuzhichalil P Surendran, Saju Pillai, Ayyappanpillai Ajayaghosh","doi":"10.1002/smtd.202402125","DOIUrl":"https://doi.org/10.1002/smtd.202402125","url":null,"abstract":"To counter economic terrorism by preventing counterfeit currency, documents and high-value commercial products, new-generation security inks with multiple safety features are required. Herein, color-tunable pyrylium and pyridinium dye-encapsulated polymethyl methacrylate (PMMA) colloidal microspheres are reported to exhibiting brilliant emission and photonic properties. A combination of the PMMA colloidal photonic ink having structural color variation and the dye-encapsulated colloidal photonic ink with fluorescence modulation is used for security labeling. The angle-dependent structural color variations, a remarkable 250-fold fluorescence enhancement, non-toxicity, and the rare earth-free formulation have made the ink novel and suitable for dual-layer high-security printing. Covert security patterns and labels are made overt under 365 nm UV light, while also exhibiting angle-dependent structural color. The increased level of security with developed photonic colloidal inks is demonstrated with dual-layer screen-printed images and patterns on flexible substrates.","PeriodicalId":229,"journal":{"name":"Small Methods","volume":" ","pages":"e2402125"},"PeriodicalIF":10.7,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142862717","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

Direct Tensile Testing of Free-Standing Ultrathin Polymer Films on Liquid Surface at High Temperature.

IF 10.7 2区材料科学

Small Methods Pub Date : 2024-12-19 DOI: 10.1002/smtd.202401291

Tae-Ik Lee, Ji Hun Kim, Eun Sung Oh, Taek-Soo Kim

{"title":"Direct Tensile Testing of Free-Standing Ultrathin Polymer Films on Liquid Surface at High Temperature.","authors":"Tae-Ik Lee, Ji Hun Kim, Eun Sung Oh, Taek-Soo Kim","doi":"10.1002/smtd.202401291","DOIUrl":"https://doi.org/10.1002/smtd.202401291","url":null,"abstract":"The fragile nature of ultrathin polymer films poses a challenge for precise mechanical property measurements in a free-standing state, despite their critical importance for the fabrication and performance of advanced electronic devices under thermal loading. Here, a novel high-temperature tensile testing method for free-standing ultrathin polymer films using a film on heated liquid (FOHL) platform is proposed. Glycerol is chosen for the thermally stable liquid platform for its high surface tension, high boiling point, miscibility with water, and chemical stability. A defect healing process of the specimen on the heated liquid effectively eliminates preexisting defects of the brittle polymer sample, enabling precise tensile property measurements at elevated temperatures. The methodology is validated through experiments on polystyrene (PS) films of varying thicknesses (50-400 nm) at elevated temperatures of 25-100 °C, demonstrating the influence of temperature and thickness on tensile properties. Decreasing elastic modulus with increasing temperature and decreasing thickness of ultrathin PS films is accurately measured. The proposed method provides a reliable method todirectly evaluate the tensile properties of ultrathin films in high-temperature conditions.","PeriodicalId":229,"journal":{"name":"Small Methods","volume":" ","pages":"e2401291"},"PeriodicalIF":10.7,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142862716","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

Cyanogroup-Modified PEO-Based Electrolytes Achieve High Free Al³⁺ Concentration and Improve the Transport Dynamics in Solid-State Aluminum-Ion Batteries.

IF 10.7 2区材料科学

Small Methods Pub Date : 2024-12-18 DOI: 10.1002/smtd.202401737

Hongquan Pan, Qiwen Sun, Wenming Zhang, Zhanyu Li

{"title":"Cyanogroup-Modified PEO-Based Electrolytes Achieve High Free Al3+ Concentration and Improve the Transport Dynamics in Solid-State Aluminum-Ion Batteries.","authors":"Hongquan Pan, Qiwen Sun, Wenming Zhang, Zhanyu Li","doi":"10.1002/smtd.202401737","DOIUrl":"https://doi.org/10.1002/smtd.202401737","url":null,"abstract":"Polymer-based solid electrolyte boasting ultra-high safety, energy density, mechanical strength and flexibility, attracting much attention in the field of battery applications. However, its widespread application is hindered by the low conductivity, insufficient aluminium salt dissociation, high crystallization degree, short service life, etc. To solve the above problems, a composite solid polymer electrolyte (SPE) design based on polyethylene oxide (PEO, Mw = 6 000 000) with AlCl3·6H2O as aluminum salt and butanedinitrile (SN) as plasticizer is proposed in this paper. The disorder and mobility of the PEO chains, conductivity, degree of aluminum salt dissociation, and service life are enhanced by the addition of plasticizer SN. Theoretical calculation demonstrates the formation of solvated sheath-like structure [SN…Al3+] has strong interactions with the polymer PEO, allowing rapid transport of Al3+ through the polymer segments. These results are also further verified by subsequent tests, which can reveal the Al3+ transport mechanism of room-temperature SPEs in a more reasonable way. Meanwhile, the relatively strong binding energy between PEO and SN can help to avoid the parasitic reaction between SN and Al, increase the service life of solid-state aluminium-ion batteries. Providing a promising solution for the design of solid-state battery electrolytes that can be applied at room temperature.","PeriodicalId":229,"journal":{"name":"Small Methods","volume":" ","pages":"e2401737"},"PeriodicalIF":10.7,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142851690","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

Toward Automated DNA Nanoprinting: Advancing the Synthesis of Covalently Branched DNA.

IF 10.7 2区材料科学

Small Methods Pub Date : 2024-12-18 DOI: 10.1002/smtd.202401477

Fangzhou Zhao, Daniel Saliba, Jathavan Asohan, Hanadi F Sleiman

{"title":"Toward Automated DNA Nanoprinting: Advancing the Synthesis of Covalently Branched DNA.","authors":"Fangzhou Zhao, Daniel Saliba, Jathavan Asohan, Hanadi F Sleiman","doi":"10.1002/smtd.202401477","DOIUrl":"https://doi.org/10.1002/smtd.202401477","url":null,"abstract":"Covalently branched DNA molecules are hybrid structures where a small molecule core is covalently linked to different DNA strands. They merge the programmability of DNA nanotechnology with synthetic molecules' functionality, offering enhanced stability over their non-covalent counterparts like double-crossover tiles. They enable the efficient assembly of stable DNA nanostructures with new geometries and functionalities. These motifs can be prepared through \"DNA printing\", which uses a DNA nanostructure as a temporary template to covalently transfer specific DNA strands to a small molecule core. Here, the \"printing\" process is streamlined with DNA-immobilized polystyrene microspheres, laying the foundation for future automated DNA printing devices. First, the DNA template hybridizes with reactive complementary strands, which are then crosslinked using a small molecule. Second, beads with fully complementary molecules capture the \"daughter\" products by strand displacement. This ensures high product yields and high recovery of the \"mother\" template for reuse. This method allows the precise transfer of different DNA strands onto various small molecules, including aromatics and functional porphyrins. Notably, these branching motifs exhibit remarkable stability toward nucleases without any specialized modifications. Moreover, they can serve as robust building blocks for precise assembly of 3D structures, such as an addressable tetrahedron from only two components.","PeriodicalId":229,"journal":{"name":"Small Methods","volume":" ","pages":"e2401477"},"PeriodicalIF":10.7,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142851691","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

Reconfiguration of Intrinsic Depletion-Mode Characteristics of MoS₂ Field-Effect Transistors to High-Performance Enhancement-Mode Operation Using an Argon Plasma-Induced p-Type Doping Technique. 利用氩等离子体诱导 p 型掺杂技术重新配置 MoS2 场效应晶体管的本征耗尽模式特性，使其进入高性能增强模式运行。

IF 10.7 2区材料科学

Small Methods Pub Date : 2024-12-17 DOI: 10.1002/smtd.202401001

Anand Kumar Rai, Asif A Shah, Aadil Bashir Dar, Jeevesh Kumar, Mayank Shrivastava

{"title":"Reconfiguration of Intrinsic Depletion-Mode Characteristics of MoS2 Field-Effect Transistors to High-Performance Enhancement-Mode Operation Using an Argon Plasma-Induced p-Type Doping Technique.","authors":"Anand Kumar Rai, Asif A Shah, Aadil Bashir Dar, Jeevesh Kumar, Mayank Shrivastava","doi":"10.1002/smtd.202401001","DOIUrl":"https://doi.org/10.1002/smtd.202401001","url":null,"abstract":"The intrinsic n-type behavior and unavailability of the appropriate p-type doping method for MoS2 allows only n-type conduction with depletion mode (D-mode) characteristics and forbids the implementation of p-type field-effect transistors (FETs). The D-mode characteristic results in a high off-current (IOFF) at zero gate bias, which limits the usage of MoS2 FETs for industry-scale (n-channel metal-oxide semiconductor) NMOS/(complementary metal-oxide semiconductor) CMOS-logic-based applications due to significant power dissipation. Both these issues, i.e., i) missing technique for p-type doping and ii) D-mode operation are addressed here through the application of argon (Ar) plasma and subsequent O2 bath. Here, Ar plasma results in the physical removal of sulfur (S) atoms from the MoS2 surface, introducing sulfur vacancies, and the O2 bath results in the chemical bonding of O2 molecules with molybdenum (Mo) atoms at the introduced S vacancy sites. This leads to the formation of shallow acceptor states near the valance band (VB) of MoS2, resulting in p-type doping and enhancement mode (E-mode) characteristics of MoS2 FETs. Moreover, using Ar plasma results in the reduction of contact resistance (RC) of E-mode MoS2 FETs and hence facilitates achieving high-performance top-gated E-mode MoS2 FETs with IOFF (at zero gate bias) in tens of picoamperes and ION/IOFF in seven orders.","PeriodicalId":229,"journal":{"name":"Small Methods","volume":" ","pages":"e2401001"},"PeriodicalIF":10.7,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142833405","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

Versatile and Fast Electrochemical Activation Method for Carbon Nanotube Fibers with Diverse Active Materials.

IF 10.7 2区材料科学

Small Methods Pub Date : 2024-12-17 DOI: 10.1002/smtd.202401478

Sungju Lee, Hayoung Yu, Min Gook Han, Hyewon Jung, Hee-Tae Jung, Seung Min Kim, Hyeon Su Jeong

{"title":"Versatile and Fast Electrochemical Activation Method for Carbon Nanotube Fibers with Diverse Active Materials.","authors":"Sungju Lee, Hayoung Yu, Min Gook Han, Hyewon Jung, Hee-Tae Jung, Seung Min Kim, Hyeon Su Jeong","doi":"10.1002/smtd.202401478","DOIUrl":"https://doi.org/10.1002/smtd.202401478","url":null,"abstract":"In this study, the challenge of non-electrochemical activity in carbon nanotube fibers (CNTFs) is addressed by developing a modified chlorosulfonic acid (CSA) densification process specifically developed for directly spun CNTFs. This post-treatment method, well-known for enhancing the physical properties of CNTFs, utilizes the double diffusion phenomenon to efficiently integrate a diverse range of active materials, from conductive polymers like polyaniline (PANI) to metal oxides like nickel oxide (NiO), into the fibers. This universal and cost-effective approach not only simplifies the integration process but also significantly boosts both the electrochemical and physical properties of the fibers. For instance, the PANI@CNTF composite exhibited a remarkable 17-fold increase in specific capacitance and a two-fold increase in load value compared to its pristine counterparts. This method proves straightforward, efficient, and versatile, making it suitable for developing fiber-shaped electrodes that advance the capabilities of wearable energy storage systems.","PeriodicalId":229,"journal":{"name":"Small Methods","volume":" ","pages":"e2401478"},"PeriodicalIF":10.7,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142845369","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

Smart Compositional Design of B-Site Ordered Double Perovskite for Advanced Oxygen Catalysis at Ultra-High Current Densities.

IF 10.7 2区材料科学

Small Methods Pub Date : 2024-12-17 DOI: 10.1002/smtd.202401480

Maria Christy, Jiseok Kwon, Sathya Sheela Subramanian, Seunggun Choi, Junghyun Choi, Jung Ho Kim, Ungyu Paik, Taeseup Song

{"title":"Smart Compositional Design of B-Site Ordered Double Perovskite for Advanced Oxygen Catalysis at Ultra-High Current Densities.","authors":"Maria Christy, Jiseok Kwon, Sathya Sheela Subramanian, Seunggun Choi, Junghyun Choi, Jung Ho Kim, Ungyu Paik, Taeseup Song","doi":"10.1002/smtd.202401480","DOIUrl":"https://doi.org/10.1002/smtd.202401480","url":null,"abstract":"Perovskite oxides have been considered promising oxygen catalysts for oxygen reduction and evolution reactions (ORR and OER), owing to structural and compositional flexibility, and tailorable properties. Ingenious B-site ordered La1.5Sr0.5NiMn0.5Fe0.5O6 (LSNMF) double perovskite is strategically designed by simultaneously interposing Ni0.5Mn0.5 and Ni0.5Fe0.5 into B' and B″ sites. Controlling B-site cation systematically tailors the electronic structure of the B-site cation with a d-band center (Md) upshift close to the Fermi level, increasing the overlap of the Md center and O 2p center (OP). The strong interaction of Md and Op facilitates the adsorption of oxygen and activates the lattice oxygen to participate in the OER process, thereby enhancing the ORR and OER activity. For ORR, LSNMF exhibited an onset potential of 0.9 V along with a high limiting current of -8.05 mA cm-2. At the same time, for OER at 1 m KOH, LSNMF effectively reached a maximum current density of 3000 mA cm-2. Most importantly, the difference between EORR (at -1 mA cm-2) and EOER (at 10 mA cm-2), ΔE is 0.69 V, which stands among the best of recently reported perovskites. The as-designed LSNMF is stable, efficient, lucrative, and a promising candidate for practical application.","PeriodicalId":229,"journal":{"name":"Small Methods","volume":" ","pages":"e2401480"},"PeriodicalIF":10.7,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142833414","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 Versatile Method to Produce Monomodal Nano- to Micro-Fiber Fragments as Fillers for Biofabrication. 生产单模纳米至微纤维片段作为生物制造填充物的多功能方法。

IF 10.7 2区材料科学

Small Methods Pub Date : 2024-12-17 DOI: 10.1002/smtd.202401060

Zan Lamberger, Vivien Priebe, Matthias Ryma, Gregor Lang

{"title":"A Versatile Method to Produce Monomodal Nano- to Micro-Fiber Fragments as Fillers for Biofabrication.","authors":"Zan Lamberger, Vivien Priebe, Matthias Ryma, Gregor Lang","doi":"10.1002/smtd.202401060","DOIUrl":"https://doi.org/10.1002/smtd.202401060","url":null,"abstract":"A key goal of biofabrication is the production of 3D tissue models with biomimetic properties. In natural tissues, fibrils-mainly composed of collagen-play a critical role in stabilizing and spatially organizing the extracellular matrix. To use biomimetic fibers for reinforcing bioinks in 3D printing, fiber fragmentation is necessary to prevent nozzle clogging. However, existing fragmentation methods are often material-specific, poorly scalable, and provide limited control over fragment size and shape. A novel workflow is introduced for producing fiber fragments applicable to various materials and fabrication techniques such as electrospinning, melt-electrowriting, fused deposition modeling, wet spinning, and microfluidic spinning. The method uses a sacrificial membrane as a substrate for precise cryo-sectioning of fibers. A significant advantage is that no additional handling steps, such as fiber detachment or transfer, are needed, resulting in highly reproducible fiber sectioning with a quasi-monodisperse length distribution. The membrane can be rolled before cutting, preventing fibers from sticking together and significantly increasing production efficiency. This method is also versatile, applicable to multiple fiber types and materials without re-parameterization. Cell culture experiments demonstrate that the fibers maintain key properties necessary for cell-fiber interactions, making them suitable for systematic screenings in the development of anisotropic 3D tissue models.","PeriodicalId":229,"journal":{"name":"Small Methods","volume":" ","pages":"e2401060"},"PeriodicalIF":10.7,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142845366","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

Unraveling the Synergistic Role of Sm³⁺ Doped NiFe-LDH as High-Performance Electrocatalysts for Improved Anion Exchange Membrane and Water Splitting Applications. 揭示掺杂 Sm3+ 的 NiFe-LDH 作为高性能电催化剂在改进阴离子交换膜和水分离应用中的协同作用。

IF 10.7 2区材料科学

Small Methods Pub Date : 2024-12-17 DOI: 10.1002/smtd.202401655

Sreenivasan Nagappan, Hemalatha Gurusamy, Harpriya Minhas, Arun Karmakar, S Ravichandran, Biswarup Pathak, Subrata Kundu

{"title":"Unraveling the Synergistic Role of Sm3+ Doped NiFe-LDH as High-Performance Electrocatalysts for Improved Anion Exchange Membrane and Water Splitting Applications.","authors":"Sreenivasan Nagappan, Hemalatha Gurusamy, Harpriya Minhas, Arun Karmakar, S Ravichandran, Biswarup Pathak, Subrata Kundu","doi":"10.1002/smtd.202401655","DOIUrl":"https://doi.org/10.1002/smtd.202401655","url":null,"abstract":"Effective first-row transition metal-based electrocatalysts are crucial for large-scale hydrogen energy generation and anion exchange membrane (AEM) devices in water splitting. The present work describes that SmNi0.02Fe-LDH nanosheets on nickel foam are used as a bifunctional electrocatalyst for water splitting and AEM water electrolyzer study. Tuning the Ni-to-Fe ratios in NiFe-LDH and doping with Sm ions improves the electrical structure and intrinsic activity. SmNi0.02Fe-LDH has higher oxygen evolution reaction (OER), HER, and TWS activity, achieving 10 mA cm⁻2 current density at lower overpotentials (230 mV, 95 mV, and 1.62 V, respectively). In AEMWE cells, SmNi0.02Fe-LDH as a cathode and anode pair exhibits outstanding activity (0.9 A cm⁻2 at 2 V) and stability over 120 h. Density Functional Theory (DFT) investigations reveal that the Sm doping in NiFe-LDH surface enhances its bifunctional activity toward OER and HER. These findings emphasize the potential of non-noble composites for long-term water electrolysis in total water splitting and AEMWE applications.","PeriodicalId":229,"journal":{"name":"Small Methods","volume":" ","pages":"e2401655"},"PeriodicalIF":10.7,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142833416","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