Small Methods最新文献_第2页

Pt/Al₂O₃ Overcoated with Reactive Metal Oxides and Their Application to Catalytic Oxidation of Propane. 活性金属氧化物包覆Pt/Al2O3及其在丙烷催化氧化中的应用

IF 9.1 2区材料科学

Small Methods Pub Date : 2025-10-01 DOI: 10.1002/smtd.202501377

Geun-Ho Han, Kunmo Koo, Selim Alayoglu, Siobhan W Brown, Justin M Notestein

{"title":"Pt/Al2O3 Overcoated with Reactive Metal Oxides and Their Application to Catalytic Oxidation of Propane.","authors":"Geun-Ho Han, Kunmo Koo, Selim Alayoglu, Siobhan W Brown, Justin M Notestein","doi":"10.1002/smtd.202501377","DOIUrl":"https://doi.org/10.1002/smtd.202501377","url":null,"abstract":"Inverse-structured metal-metal oxide materials-where the oxides are located on top of a different metal-can provide unique chemical properties. Here, a few layers of reactive metal oxides, including In2O3, MoO3, Bi2O3, or TiO2, are overcoated on Al2O3-supported Pt nanoparticles using atomic layer deposition (ALD). In contrast to prior work focusing on stabilizing metal surfaces or new mixed-valence nanoparticles, here the goal is to create new reactive surfaces and interfaces. The overcoating altered the Pt nanoparticle accessibility as measured by STEM, CO chemisorption, and CO DRIFTS. The reactivity of the overcoated materials is interrogated with temperature-programmed reduction in H2, in propane, and in the catalytic reaction of propane with O2. Strong interactions between In2O3 and the Pt nanoparticles are evident from changes in Pt accessibility, In2O3 reducibility, and tandem catalytic reactivity. MoO3 and Bi2O3 overcoats also showed significant changes to Pt accessibility and the reducibility of the oxide in H2; Bi2O3 addition led to complete propane combustion. This study establishes ALD methods for reactive oxides on high surface area materials suitable for applications such as heterogeneous catalysis, and it illustrates the wide range of useful physiochemical modifications resulting from the unique oxide-metal interfaces generated.","PeriodicalId":229,"journal":{"name":"Small Methods","volume":" ","pages":"e01377"},"PeriodicalIF":9.1,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145197707","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

Combined In Situ EQCM-Raman Study of Zn Storage Mechanism in Polyaniline for Zinc-Ion Battery. 锌离子电池用聚苯胺储锌机理的原位EQCM-Raman联合研究。

IF 9.1 2区材料科学

Small Methods Pub Date : 2025-10-01 DOI: 10.1002/smtd.202501273

Emine Kapancik Ulker, Pranay Hirani, Shaoliang Guan, Abhishek Lahiri

{"title":"Combined In Situ EQCM-Raman Study of Zn Storage Mechanism in Polyaniline for Zinc-Ion Battery.","authors":"Emine Kapancik Ulker, Pranay Hirani, Shaoliang Guan, Abhishek Lahiri","doi":"10.1002/smtd.202501273","DOIUrl":"https://doi.org/10.1002/smtd.202501273","url":null,"abstract":"Zinc-ion batteries (ZIBs) have attracted increasing attention as safe, cost-effective, and environmentally friendly alternatives to lithium-ion batteries for large-scale energy storage. Among various cathode materials for Zn batteries, polyaniline (PANI) is a potential material that presents benefits such as high conductivity and pseudocapacitive behavior. However, it often suffers from limited cycling stability and structural degradation during repeated charge-discharge processes. Here, in situ electrochemical quartz crystal microbalance (EQCM)-Raman technique is combined to understand the Zn storage behavior in PANI wherein limited Zn insertion is observed along with detachment of the polymer from the substrate. Through anion doping of PANI, the structural stability is enhanced, and the overall Zn cycling capability is improved. Ex situ X-ray photoelectron spectroscopy (XPS) studies further reveal that doping of PANI significantly reduces the oxidation of PANI, which leads to an improved battery performance. The doped-PANI shows a high specific capacity of 310 and 235 mAh g-1 at 0.25 and 1 A g-1, respectively, and retains 85% of its initial capacity after 300 cycles at 1 A g-1. These results reveal that it is important to understand the storage mechanism to develop useful strategies to improve ZIBs performance.","PeriodicalId":229,"journal":{"name":"Small Methods","volume":" ","pages":"e01273"},"PeriodicalIF":9.1,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145197701","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

Solving the Contamination Conundrum Derived from Coisolation of Extracellular Vesicles and Lipoproteins: Approaches for Isolation and Characterization. 解决由细胞外囊泡和脂蛋白共同分离引起的污染难题：分离和表征的方法。

IF 9.1 2区材料科学

Small Methods Pub Date : 2025-10-01 DOI: 10.1002/smtd.202501606

Mengyi Lan, Yuan Zhang, Yong Chen

{"title":"Solving the Contamination Conundrum Derived from Coisolation of Extracellular Vesicles and Lipoproteins: Approaches for Isolation and Characterization.","authors":"Mengyi Lan, Yuan Zhang, Yong Chen","doi":"10.1002/smtd.202501606","DOIUrl":"https://doi.org/10.1002/smtd.202501606","url":null,"abstract":"Extracellular vesicles (EVs) are nanoscale lipid-bilayer-enclosed particles released by most cell types, serving as pivotal mediators of intercellular communication, cargo transport, and immune regulation. Owing to their intrinsic biological functions and biocompatibility, EVs demonstrate tremendous potential in medical applications. However, a major challenge in EV research is the coisolation of lipoprotein (LP) contaminants, particularly plasma lipoproteins, during the purification of biofluids (e.g., plasma or serum) or cell culture supernatants. LPs and EVs exhibit substantial overlap in physicochemical properties, including particle size and density, which likely contributes to their coisolation. Notably, mutual-contamination between these two particle populations can significantly interfere with downstream analyses, leading to misinterpretation of their respective compositions and biological functions. Therefore, obtaining high-purity EV and LP isolates free from mutual contamination is crucial. To address this technical challenge, there is an urgent need to establish robust isolation methods and standardized characterization systems. This review systematically evaluates current EV/LP isolation technologies with varying separation specificities, while innovatively proposing characterization strategies capable of distinguishing EVs, LPs, and potential EV-LP complexes. By elucidating the \"mutual-contamination\" issues between these particles, it is aimed to promote and call for the establishment of stricter methodological standards in this field.","PeriodicalId":229,"journal":{"name":"Small Methods","volume":" ","pages":"e01606"},"PeriodicalIF":9.1,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145197716","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

First-Principles Study on the Interfacial Cathode-Contact Stability and Li Diffusivity of N-Doped Li₆Zr₂O₇ for All-Solid-State Li-Ion Batteries. 全固态锂离子电池n掺杂Li6Zr2O7界面阴极接触稳定性和Li扩散率的第一性原理研究。

IF 9.1 2区材料科学

Small Methods Pub Date : 2025-10-01 DOI: 10.1002/smtd.202501289

Randy Jalem, Yoshitaka Tateyama, Kazunori Takada, Tetsuya Yamada, Katsuya Teshima

{"title":"First-Principles Study on the Interfacial Cathode-Contact Stability and Li Diffusivity of N-Doped Li6Zr2O7 for All-Solid-State Li-Ion Batteries.","authors":"Randy Jalem, Yoshitaka Tateyama, Kazunori Takada, Tetsuya Yamada, Katsuya Teshima","doi":"10.1002/smtd.202501289","DOIUrl":"https://doi.org/10.1002/smtd.202501289","url":null,"abstract":"Here, N-doped Li6Zr2O7 (LZON) is investigated using first-principles density functional theory (DFT) methods to evaluate its (electro)chemical stability and Li-ion transport properties for its novel design as a practical dual-use Li ionic conductor, both as a cathode-coating layer (CCL) and solid electrolyte (SE) in all-solid-state Li-ion batteries (ASSBs). Thermodynamic free energy calculations showed that LZO, as CCL and SE, is chemically stable versus most known cathode materials. Focusing on LiCoO2 (LCO) cathode, explicit hetero-interface modeling analysis of the low-energy LCO(104)|LZO(001) interface revealed that LZO can form a strongly adhered and a low-strain contact with LCO. The electronic structure of this interface has LCO-side states (Co-3d, O-2p) occupying the highest occupied states, thereby facilitating a stable cell charging. Climbing-image nudged elastic band calculations results suggested that the LCO(104)|LZO(001) interface also has interface-normal diffusion pathways with low Li ion migration energy. Meanwhile, ab-initio- and machine-learning-based molecular dynamics simulation results confirmed that Li diffusivity in bulk LZO can be greatly enhanced by several orders of magnitude via aliovalent N-doping with Li interstitial addition. For the LCO(104)|LZON(001) interface, the N dopant is determined to energetically prefer the LZON bulk region, the corresponding interface electronic structure that can also facilitate a stable ASSB cell charging.","PeriodicalId":229,"journal":{"name":"Small Methods","volume":" ","pages":"e01289"},"PeriodicalIF":9.1,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145197754","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

Stepped-Current-Controlled Evolution of Cu(OH)₂/CuO Tandem Nanostructure for Efficient Photothermal Conversion. 用于高效光热转换的Cu(OH)2/CuO串联纳米结构的阶梯电流控制演化。

IF 9.1 2区材料科学

Small Methods Pub Date : 2025-09-30 DOI: 10.1002/smtd.202501354

Haiyun Zhang, Kehinde Kassim, Rong Tang, Lu Li, Zhihao Li, Yuan Yuan, Kaiqi Zhao, Yajun Wu, Haijian Wang, Xuehua Zhang, Kaixin Jiang, Ben Bin Xu, Lidong Sun

{"title":"Stepped-Current-Controlled Evolution of Cu(OH)2/CuO Tandem Nanostructure for Efficient Photothermal Conversion.","authors":"Haiyun Zhang, Kehinde Kassim, Rong Tang, Lu Li, Zhihao Li, Yuan Yuan, Kaiqi Zhao, Yajun Wu, Haijian Wang, Xuehua Zhang, Kaixin Jiang, Ben Bin Xu, Lidong Sun","doi":"10.1002/smtd.202501354","DOIUrl":"https://doi.org/10.1002/smtd.202501354","url":null,"abstract":"Photothermal conversion is an important compensation to the current energy system, which is capable of converting the sunlight into thermal energy. Copper serves as an excellent heat conductor but exhibits limited absorption over the solar spectrum, even with oxide coatings upon annealing. Herein, vertically aligned copper oxides are tailored on the copper surfaces by electrochemical anodization. The current transient renders a unique stepped profile, which corresponds to the structure evolution from a double-layered stack, i.e., the Cu(OH)2 nanowires sitting atop the CuO nanosheets, to a single-layered CuO nanosheets. The as-anodized CuO nanosheets impart strong light absorption in the range of 200-1200 nm. Under one sun illumination, the water rises up to 102.6 °C in 20 min inside copper tubes with the CuO coatings, as compared to the 60.6 °C without the coatings. Under frozen conditions, the CuO nanosheets also result in a rapid de-icing process in just 700 s, in obvious contrast to the 1200 s for pristine copper. This is attributed to the high photothermal conversion efficiency of 73.6% for the CuO coatings, being more than doubled with respect to the copper. The photothermal coatings may find important applications in seawater desalination, evaporation-induced electricity generation, hydrogen evolution reaction, etc.","PeriodicalId":229,"journal":{"name":"Small Methods","volume":" ","pages":"e01354"},"PeriodicalIF":9.1,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145190570","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-Toughness and High-Ductility Gold Electrodes for High-Performance Deformable Organic Transistor Arrays. 用于高性能可变形有机晶体管阵列的高韧性和高延展性金电极。

IF 9.1 2区材料科学

Small Methods Pub Date : 2025-09-29 DOI: 10.1002/smtd.202501452

Peng Xue, Juntong Li, Xiaoli Zhao, Junru Zhang, Xianghui Liu, Hongyan Yu, Guodong Zhao, Yanping Ni, Yao Fu, Pengbo Xi, Mingxin Zhang, Bowen Xiang, Yijun Shi, Yanhong Tong, Yongjun Dong, Qingxin Tang, Yichun Liu

{"title":"High-Toughness and High-Ductility Gold Electrodes for High-Performance Deformable Organic Transistor Arrays.","authors":"Peng Xue, Juntong Li, Xiaoli Zhao, Junru Zhang, Xianghui Liu, Hongyan Yu, Guodong Zhao, Yanping Ni, Yao Fu, Pengbo Xi, Mingxin Zhang, Bowen Xiang, Yijun Shi, Yanhong Tong, Yongjun Dong, Qingxin Tang, Yichun Liu","doi":"10.1002/smtd.202501452","DOIUrl":"https://doi.org/10.1002/smtd.202501452","url":null,"abstract":"Electrodes with good electrical conductivity and mechanical stability are key to achieving high-performance deformable electronic devices. The Au electrode offers high conductivity, a work function matched to P-type semiconductors, and compatibility with lithography processes. However, the Young's modulus of Au electrode does not match that of commonly used flexible substrates, limiting their application in deformable electronics. Here, a micropatterned Au electrode with high robustness and high ductility is prepared using a photopolymer substrate. Based on this strategy, a high performance deformable active-matrix organic thin-film transistor (OTFT) array is fabricated. The transistor array exhibits a maximum mobility of 2.7 cm2V-1s-1 and its performance remains essentially unchanged after 500 bending cycles. The active-matrix OTFT array achieves a density of up to 10,000 units cm-2, with gate lead widths as narrow as 10 µm. These results demonstrate that Au electrodes prepared with this strategy hold strong potential for future deformable and wearable electronics.","PeriodicalId":229,"journal":{"name":"Small Methods","volume":" ","pages":"e01452"},"PeriodicalIF":9.1,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145190560","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

Development of Single-Molecule Enzyme Activity Assay for Serine Hydrolases Using Activity-Based Protein Labeling Probes. 基于活性蛋白标记探针的丝氨酸水解酶单分子酶活性测定方法的建立。

IF 9.1 2区材料科学

Small Methods Pub Date : 2025-09-29 DOI: 10.1002/smtd.202501643

Seiya Ishii, Mayano Minoda, Tadahaya Mizuno, Takumi Iwasaka, Hiroyuki Kusuhara, Kazufumi Honda, Yasuteru Urano, Toru Komatsu

引用次数: 0

Direct Measurement of Density for Evaporated Thin Films. 蒸发薄膜密度的直接测量。

IF 9.1 2区材料科学

Small Methods Pub Date : 2025-09-28 DOI: 10.1002/smtd.202501438

Trevor Plint, Halynne R Lamontagne, Joseph Manion, Benoît H Lessard

{"title":"Direct Measurement of Density for Evaporated Thin Films.","authors":"Trevor Plint, Halynne R Lamontagne, Joseph Manion, Benoît H Lessard","doi":"10.1002/smtd.202501438","DOIUrl":"https://doi.org/10.1002/smtd.202501438","url":null,"abstract":"A simple and elegant method is reported for direct measurement of the density of vapor-deposited thin films using a combination of profilometry, microscopy, and high-vacuum thermogravimetric analysis (TGA). Density affects fabrication control, optical properties, charge transport, and mechanical properties of thin film devices. Accurate density determination is essential for optimizing device design to ensure film stability, charge balance, and light-matter interactions. Exact mass of the vapor-deposited thin films with suitable mass and aspect ratio is determined by high-vacuum TGA. Combined with precise measurements of thickness and area for each film, the true density of individual films is captured as deposited. This method avoids common universalizing assumptions about the degree of crystallinity in a film. Furthermore, this method does not depend on bulk optical or electrical parameters that may vary as a result of the unique nanoscale properties of thin films. Density values are reported for a range of small molecule semiconductors commonly found in organic electronics such as organic light emitting diodes (OLEDs), organic photovoltaics (OPVs), and organic thin film transistors (OTFTs), and compared to values calculated by other means. It is anticipated that this technique can be used to measure the density of a wide range of vacuum-stable thin film materials.","PeriodicalId":229,"journal":{"name":"Small Methods","volume":" ","pages":"e01438"},"PeriodicalIF":9.1,"publicationDate":"2025-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145184323","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

Quantification of Nanoplastics and Inorganic Nanoparticles via Laser-Induced Breakdown Detection (LIBD) (Small Methods 9/2025) 通过激光诱导击穿检测（LIBD）定量纳米塑料和无机纳米颗粒（Small Methods 9/2025）

IF 9.1 2区材料科学

Small Methods Pub Date : 2025-09-26 DOI: 10.1002/smtd.70045

Minh N. Nguyen, Pia Lipp, Ines Zucker, Andrea I. Schäfer

引用次数: 0

Mechanically Tunable Electromagnetic Metamaterials Based on Chains of Tension-rotation Coupling Units with Exceptional Reconfiguration Capability. 基于具有特殊重构能力的张力-旋转耦合单元链的机械可调谐电磁超材料。

IF 9.1 2区材料科学

Small Methods Pub Date : 2025-09-26 DOI: 10.1002/smtd.202501423

Haishan Tang, Shuchang He, Jie Tao, Chengjun Wang, Zuojia Wang, Jizhou Song

{"title":"Mechanically Tunable Electromagnetic Metamaterials Based on Chains of Tension-rotation Coupling Units with Exceptional Reconfiguration Capability.","authors":"Haishan Tang, Shuchang He, Jie Tao, Chengjun Wang, Zuojia Wang, Jizhou Song","doi":"10.1002/smtd.202501423","DOIUrl":"https://doi.org/10.1002/smtd.202501423","url":null,"abstract":"Controlling the out-of-plane rotation of split-ring resonators (SRRs) represents an effective strategy to realize mechanically tunable electromagnetic (EM) materials. However, designing structures that can achieve substantial angular rotations via straightforward stretching operations while keeping the resonators intact remains a challenge. Here, a mechanically tunable EM metamaterial constructed from parallel chains of tension-rotation units that enable substantial out-of-plane rigid rotations exceeding 120° of the SRRs through simple stretch is reported. Theoretical, numerical, and experimental studies are conducted to reveal the deformation mechanism and quantify the relationship between tensile strain and rotation angles of SRRs. Comprehensive experimental and numerical studies show that the proposed metamaterial can extensively modulate the transmissions of both linearly and circularly polarized waves. Specifically, the transmission of TE wave exhibits a distinctive two-stage increasing-decreasing behavior, and the CD presents a unique zero-positive-zero-negative profile during stretching, which are not easily accessible by existing mechanically tunable EM metamaterials due to their limited deformation capabilities. Moreover, structural reconfiguration of chain arrangements enables tunable resonance frequencies while maintaining the frequency position of maximum CD, demonstrating robust preservation of the dominant chiral eigenmode. This study provides a valuable design strategy for developing mechanically tunable EM metamaterials with high tunability and multifunctionality.","PeriodicalId":229,"journal":{"name":"Small Methods","volume":" ","pages":"e01423"},"PeriodicalIF":9.1,"publicationDate":"2025-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145147220","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