IF 13.3 2区材料科学

Small Pub Date : 2025-06-05 DOI: 10.1002/smll.202504037

Md. Abu Mosa, Jeong Yeop Jo, Sang-Hyeon Park, Kye-Si Kwon

{"title":"Aerosol Printing of 3D Conductive Microstructures via Precision Dot Modulation","authors":"Md. Abu Mosa, Jeong Yeop Jo, Sang-Hyeon Park, Kye-Si Kwon","doi":"10.1002/smll.202504037","DOIUrl":"https://doi.org/10.1002/smll.202504037","url":null,"abstract":"The advancement of electronic devices necessitates the fabrication of high-precision, 3D conductive microstructures using functional materials. This study introduces an improved pneumatic shuttering method for aerosol printing (AP), enabling the fabrication of 3D microstructures. The approach overcomes the limitations of conventional AP techniques, which struggle to print dot-based structures essential for constructing intricate 3D geometries layer by layer. To address this challenge, a pneumatic shuttering mechanism based on flow-path control is developed, enabling rapid on–off jet for both line and dot printing. This technique allows precise dot modulation (ranging from 20 to 144 µm), facilitating high-resolution and scalable patterning. Leveraging this capability, an analog halftoning technique is implemented, enabling precise control of the deposition of functional materials. Additionally, the method supports the fabrication of complex 3D microstructures, including conductive pillars with customizable angles relative to the substrate. These pillars serve as interconnects for chips with uneven surfaces, effectively addressing challenges associated with large height variations. This advancement in AP technology significantly enhances deposition precision and patterning flexibility, broadening its potential for advanced material applications in next-generation electronics and additive manufacturing.","PeriodicalId":228,"journal":{"name":"Small","volume":"85 1","pages":""},"PeriodicalIF":13.3,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144219424","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

Unprecedented Growth of 2D Nanostructures in Photo-Active System Enabled by Secondary Nucleation 二次成核使二维纳米结构在光活性体系中空前生长

IF 13.3 2区材料科学

Small Pub Date : 2025-06-05 DOI: 10.1002/smll.202504673

Nagadatta Pravallika, Priti Kumari, Yelukula Ramakrishna, Seelam Prasanthkumar

{"title":"Unprecedented Growth of 2D Nanostructures in Photo-Active System Enabled by Secondary Nucleation","authors":"Nagadatta Pravallika, Priti Kumari, Yelukula Ramakrishna, Seelam Prasanthkumar","doi":"10.1002/smll.202504673","DOIUrl":"https://doi.org/10.1002/smll.202504673","url":null,"abstract":"Living polymerization offers an intriguing process to control the nanostructure's explicit size and shape of organic materials. Owing to their thermodynamic stability, organic sensitized materials are intricate to attain precise structures. Herein, the imidazole tethered triphenylamine and their terminals functionalized with amide and dodecyl chain (ITAAL) are reported to facilitate the thermodynamic stable 1D nanostructures and transform to 2D nanosheets upon light stimulation, an unprecedented phenomenon in the realm of triarylamines. Subsequently, kinetically controlled experiments reveal the transverse growth of bundled nanorods from ITAAL, while ITAAL•+ discloses the lateral growth of extended 2D nanosheets via homo-seeding living polymerization, resulting in high electrical conductivity. Interestingly, seed ITAAL with a monomer of ITAAL•+ and perylene diimide leads to extended 1D and 2D nanostructures supporting hetero-seeding polymerization, which paves the way to investigate the donor–acceptor derived heterostructures with controlled dynamics to promote the design of efficient photovoltaic devices.","PeriodicalId":228,"journal":{"name":"Small","volume":"39 1","pages":""},"PeriodicalIF":13.3,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144219425","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

Interfacial Linkage Engineering Inducted Directional Electron Transfer Over ZnIn2S4@BiOCl S-Scheme Heterojunctions for CO2 Photoreduction and Tetracycline Decomposition 链接工程诱导定向电子转移在ZnIn2S4@BiOCl S-Scheme异质结上的CO2光还原和四环素分解

IF 13.3 2区材料科学

Small Pub Date : 2025-06-05 DOI: 10.1002/smll.202500670

Fan Wu, Yonggong Tang, Yuwei Pan, Jiangang Han, Weinan Xing, Jin Zhang, Guangyu Wu, Yudong Huang

引用次数: 0

High-Density CuBi2O4 Photocathodes Using Well-Textured Buffer Layers and Their Unassisted Solar Hydrogen Production Performances (Small 22/2025) 基于纹理良好缓冲层的高密度CuBi2O4光电阴极及其无辅助太阳能制氢性能（Small 22/2025）

IF 13 2区材料科学

Small Pub Date : 2025-06-05 DOI: 10.1002/smll.202570169

Ji Hoon Choi, Ji Hye Jeong, Hak Hyeon Lee, Dong Su Kim, Kun Woong Lee, Won Seok Yang, Jee Won Byeon, Jae-Hee Han, Hyung Koun Cho

引用次数: 0

Sustainable and Clean Energy Harvesting Device Using Reversible Redox Reactions Driven Alternately by Light and Moisture 利用光和水分交替驱动可逆氧化还原反应的可持续清洁能源收集装置

IF 13.3 2区材料科学

Small Pub Date : 2025-06-05 DOI: 10.1002/smll.202503813

Honglin Jiang, Yinpeng Huang, Xulei Lu, Chunqiao Fu, Chenxing Wang, Yong Zhang, Hangxia Liu, Peng Duan, Tingting Yang

{"title":"Sustainable and Clean Energy Harvesting Device Using Reversible Redox Reactions Driven Alternately by Light and Moisture","authors":"Honglin Jiang, Yinpeng Huang, Xulei Lu, Chunqiao Fu, Chenxing Wang, Yong Zhang, Hangxia Liu, Peng Duan, Tingting Yang","doi":"10.1002/smll.202503813","DOIUrl":"https://doi.org/10.1002/smll.202503813","url":null,"abstract":"In nature, moisture and solar irradiation serve as abundant clean energy sources for advancing next-generation power generators. However, the irregular spatial-temporal distribution and alternating occurrence patterns of the dual stimuli in real-world conditions present substantial challenges to the research and development of relevant technologies. Moreover, the existing moisture-driven power generators still suffer from the problem of short power generation duration. Herein, a sustainable energy generator alternately powered by moisture and light (MLG) is demonstrated, enabled by an asymmetric design of [Fe(CN)6]3 −/[Fe(CN)6]4 − redox couple introduced into the hygroscopic hydrogel. The alternating states include two types: moisture-only effects and combined light-moisture effects with photothermal energy being dominant. The alternating moisture and light stimuli drive forward and reverse redox reactions respectively, generating a continuously alternating current output. Under pure moisture activation at 98% RH, the device exhibits peak outputs of 3.2 mA current and 0.23 V voltage. Notably, when the moisture-induced current decays to less than 100 nA after prolonged operation, a 20-min illumination at 1.5 sun intensity effectively restores the moisture-triggered current to 166 µA. The system demonstrates exceptional cycling stability under repeated light-moisture alternations, highlighting its considerable potential for sustainable energy harvesting through complementary environmental energy utilization.","PeriodicalId":228,"journal":{"name":"Small","volume":"39 1","pages":""},"PeriodicalIF":13.3,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144229058","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 Highly Efficient and Biocompatible Cupper-Based Single-Atom Nanocatalyst with Unsaturated Coordination Structure for Efficient Diabetic Wound Healing 具有不饱和配位结构的高效生物相容性铜基单原子纳米催化剂用于糖尿病伤口的高效愈合

IF 13.3 2区材料科学

Small Pub Date : 2025-06-04 DOI: 10.1002/smll.202502896

Shiyu Xu, Yin Yuan, Yukun Pan, Huihui Zhang, Siyuan Yin, Xinya Zhang, Yayun Zhang, Sheng Dai, Huawei Shen, Yongsheng Li, Dechao Niu

{"title":"A Highly Efficient and Biocompatible Cupper-Based Single-Atom Nanocatalyst with Unsaturated Coordination Structure for Efficient Diabetic Wound Healing","authors":"Shiyu Xu, Yin Yuan, Yukun Pan, Huihui Zhang, Siyuan Yin, Xinya Zhang, Yayun Zhang, Sheng Dai, Huawei Shen, Yongsheng Li, Dechao Niu","doi":"10.1002/smll.202502896","DOIUrl":"https://doi.org/10.1002/smll.202502896","url":null,"abstract":"The unsaturated coordination alters the electronic structure of metal atoms, exposing more active sites, and thereby demonstrating high catalytic activity. It is extremely difficult to precisely regulate the unsaturated coordination environment of single-atom catalysts due to the thermodynamically unstable structure. Herein, a facile “micelle-confined oxidative crosslinking and coupled coordination” strategy is proposed to construct a copper single-atom catalyst with an unsaturated Cu-N2 coordination structure in a confined silica-carbon framework (Cu SA@MCSN), which demonstrate unique pH-dependent multiple-enzymatic activity (peroxidase (POD)-like activity in an acidic environment with a low Km of 6.9 mM and Vmax of 6.3 × 10−8 M s−1 and superoxide dismutase (SOD)- and catalase (CAT)-like activity under neutral conditions). Density functional theory calculations also further confirm that the asymmetric Cu-N2 sites with edge configurations exhibit a strong adsorption capacity for oxygen-containing intermediates showing a faster reaction rate compared to their saturated coordination structure. More importantly, the metformin (MET)-loaded Cu SA@MCSN demonstrates multi-pathway antibacterial ability in acidic microenvironments and long-term anti-inflammatory effects in neutral microenvironments through the downregulation of pro-inflammatory factors and the up-regulation of anti-inflammatory and tissue regeneration factors on a rat model of methicillin-resistant Staphylococcus aureus (MRSA)-infected diabetic wounds.","PeriodicalId":228,"journal":{"name":"Small","volume":"15 1","pages":""},"PeriodicalIF":13.3,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144211659","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

Co-Stimuli-Driven 2D WSe2 Optoelectronic Synapses for Neuromorphic Computing 用于神经形态计算的共刺激驱动二维WSe2光电突触

IF 13.3 2区材料科学

Small Pub Date : 2025-06-04 DOI: 10.1002/smll.202504024

Junho Sung, Sun Woo Kim, Donghwa Lee, Seunggi Moon, Eunho Lee, Hyun Ho Kim

{"title":"Co-Stimuli-Driven 2D WSe2 Optoelectronic Synapses for Neuromorphic Computing","authors":"Junho Sung, Sun Woo Kim, Donghwa Lee, Seunggi Moon, Eunho Lee, Hyun Ho Kim","doi":"10.1002/smll.202504024","DOIUrl":"https://doi.org/10.1002/smll.202504024","url":null,"abstract":"Neuromorphic computing offers a promising approach to overcoming the limitations of von Neumann architecture by mimicking biological synapses. While optoelectronic synapses have demonstrated synaptic plasticity through optical and electrical stimuli, most studies rely on ambient light conditions, limiting their robustness and functional complexity. Here, a WSe2/h-BN/SiO2 heterostructure-based optoelectronic synapse is presented that achieves precise synaptic weight modulation through co-stimuli of electrical and optical pulses. The device exhibits enhanced paired-pulse facilitation (PPF) and long-term plasticity (LTP/LTD), demonstrating stable and linear synaptic behavior. Notably, the study systematically analyzes the effects of co-stimuli firing conditions, revealing that both the intensity of light and voltage magnitude influence synaptic weight updates. The device achieves outstanding nonlinearity, high Gmax/Gmin, and stable depression recovery, essential for high-performance neuromorphic computing. Furthermore, ANN-based cognitive simulations using MNIST digits validate their potential for inference tasks, demonstrating near-ideal accuracy. These findings underscore the potential of co-stimuli-driven synapses for multi-modal cognitive systems, paving the way for advanced neuromorphic architectures beyond single-species stimuli constraints.","PeriodicalId":228,"journal":{"name":"Small","volume":"260 1","pages":""},"PeriodicalIF":13.3,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144211288","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

CH4 Decomposition on Nickel Phyllosilicate: Switching from Tip to Base Growth of Carbon Nanotubes 层状硅酸镍上CH4的分解：碳纳米管生长从顶端到底部的转换

IF 13.3 2区材料科学

Small Pub Date : 2025-06-04 DOI: 10.1002/smll.202500994

Esteban Gioria, Vivianne K. Ocampo-Restrepo, Anton Simon Bjørnlund, Verdande Kim Pedersen, Stig Helveg, Ib Chorkendorff, Christian Danvad Damsgaard

{"title":"CH4 Decomposition on Nickel Phyllosilicate: Switching from Tip to Base Growth of Carbon Nanotubes","authors":"Esteban Gioria, Vivianne K. Ocampo-Restrepo, Anton Simon Bjørnlund, Verdande Kim Pedersen, Stig Helveg, Ib Chorkendorff, Christian Danvad Damsgaard","doi":"10.1002/smll.202500994","DOIUrl":"https://doi.org/10.1002/smll.202500994","url":null,"abstract":"The emerging trends in carbon nanotube applications make them exceptional functional materials of highly added value. Thermocatalytic CH4 decomposition is an effective pathway toward their production, forming H2 as the only byproduct. However, catalyst deactivation due to sintering and blockage of the active sites, together with their detachment from the support remains a challenge. In this work, nickel phyllosilicate is employed as a catalyst precursor for the formation of active and stable metal sites. Surprisingly, the particles remain attached to the support, switching from the typical tip-growth reported for state-of-the-art catalysts to a base growth mechanism. The nickel nanoparticles remain stable against sintering even under harsh conditions up to 750 °C. A combination of DFT calculations, in situ TEM, and in situ XRD studies reveals that the reduction of Ni─O bonds, particularly those involving silicon-bonded oxygen (Si─O─Ni; apical oxygen), requires high temperatures. Post-activation, the small, dispersed nickel nanoparticles catalyze CH4 decomposition into carbon nanotubes and H2. Unlike prior reports, in situ XRD confirms no nickel carbide formation in the bulk. Additionally, in contrast to any known nickel-based catalyst, it is demonstrated that particles below 10 nm can effectively activate CH4 cracking, avoid encapsulation, and enable the base-growth of micrometer-long, narrow carbon nanotubes.","PeriodicalId":228,"journal":{"name":"Small","volume":"19 1","pages":""},"PeriodicalIF":13.3,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144211291","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

Co-Based Dual-Metal Phosphides on P-Activated Nickel Foam for Enhanced Hydrogen Generation from Ammonia Borane 磷活化泡沫镍上钴基双金属磷化物促进氨硼烷制氢

IF 13.3 2区材料科学

Small Pub Date : 2025-06-04 DOI: 10.1002/smll.202500188

Sehrish Mehdi, Shuling Liu, Yanyan Liu, Huijuan Wei, Saima Ashraf, Ruofan Shen, Huanhuan Zhang, Xianji Guo, Xianli Wu, Tao Liu, Jianchun Jiang, Yongfeng Wang, Baojun Li

{"title":"Co-Based Dual-Metal Phosphides on P-Activated Nickel Foam for Enhanced Hydrogen Generation from Ammonia Borane","authors":"Sehrish Mehdi, Shuling Liu, Yanyan Liu, Huijuan Wei, Saima Ashraf, Ruofan Shen, Huanhuan Zhang, Xianji Guo, Xianli Wu, Tao Liu, Jianchun Jiang, Yongfeng Wang, Baojun Li","doi":"10.1002/smll.202500188","DOIUrl":"https://doi.org/10.1002/smll.202500188","url":null,"abstract":"Cobalt-based monolithic phosphides are an attractive approach due to their stability and corrosion resistance properties for catalytic reactions. Herein, phosphourous -induced Co-based dual active sites phosphides (Co2P-Ni2P-NC) are fabricated on phosphourous-activated nickel foam (P-NF) through the phosphorization method. The results confirm the uniform growth of Co2P-Ni2P nanoparticles (NPs) with octahedral morphology embedded in the carbon-nitrogen matrix. Co2P-Ni2P NPs (9.26 nm) express prominent interfacial interaction and a strong electronic modulation through phosphorous (P) inducing. Thus, the dual active sites (Co2P, Ni2P) synergistically increase the catalytic activity of the optimized catalyst Co2P-Ni2P-NC with excellent efficiency for ammonia borane hydrolysis with hydrogen evolution (rB = 4495 mL min−1 g−1Co), turnover frequency (TOF = 1214.4 h−1), and apparent activation energy (Ea = 36.17 kJ mol−1). The P-activated nickel foam in Co2P-Ni2P-NC contributes significantly to increasing the catalytic activity of the as-prepared catalysts. Thus, this work provides a rational design for developing a monolithic catalyst for industrial applications in the field of heterogeneous catalysis and sustainable energy.","PeriodicalId":228,"journal":{"name":"Small","volume":"331 1","pages":""},"PeriodicalIF":13.3,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144211648","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

“Cell-On-Demand” Digital Microfluidics for Real-Time Low-Abundance Single-Cell Isolation and Sample Analysis “细胞按需”数字微流体实时低丰度单细胞分离和样品分析

IF 13.3 2区材料科学

Small Pub Date : 2025-06-04 DOI: 10.1002/smll.202504239

Chenxuan Hu, Chunyu Chang, Maolin Zhang, Te Peng, Siyi Hu, Jiahao Li, Jun Yu, Caizhi Liao, Mude Shi, Arokia Nathan, Luigi G. Occhipinti, Hanbin Ma

{"title":"“Cell-On-Demand” Digital Microfluidics for Real-Time Low-Abundance Single-Cell Isolation and Sample Analysis","authors":"Chenxuan Hu, Chunyu Chang, Maolin Zhang, Te Peng, Siyi Hu, Jiahao Li, Jun Yu, Caizhi Liao, Mude Shi, Arokia Nathan, Luigi G. Occhipinti, Hanbin Ma","doi":"10.1002/smll.202504239","DOIUrl":"https://doi.org/10.1002/smll.202504239","url":null,"abstract":"Studying low-abundance cells at the single-cell level is critical for revealing unique biological functions. Efficient single-cell isolation technology can significantly enhance low-abundance single-cell detection sensitivity. However, the lack of individual control over each target cell hinders further bio-analysis. Here, a “cell-on-demand” large-scale digital microfluidics platform is reported for real-time low-abundance single-cell manipulations. Compared to the conventional strategy that sequentially identifies the target cells among the heterogeneous population, the “cell-on-demand” method can conduct targeted-search-guided target cell isolation, enabled by on-demand droplet splitting. The results demonstrate that “cell-on-demand” is nearly eightfold more effective compared to the conventional strategy in dealing with low-abundance (1%) single-cells. To validate the system's feasibility, heterogenous tumor spheroids samples are used for isolating homogeneous single-target tumor spheroids, in integration with subsequent drug sensitivity testing and analysis. Drug sensitivity results show significant differences in half-maximal inhibitory concentration (IC50) for three chemotherapy drugs: Fluorouracil, Irinotecan, and Oxaliplatin, while in high consistency with well-plate-based assays. With the capability of processing both high and low-abundance samples, the proposed platform shows potential in handling various samples and in broader applications.","PeriodicalId":228,"journal":{"name":"Small","volume":"4 1","pages":""},"PeriodicalIF":13.3,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144211713","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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