材料科学最新文献_第8页

Persistent Ferroelectric Retention of Ferroelectric BiFeO3 Thin Films. 铁电BiFeO3薄膜的持久铁电保留。

IF 10.8 1区材料科学

Nano Letters Pub Date : 2025-10-19 DOI: 10.1021/acs.nanolett.5c04334

Yu Tian,Jiajia Liao,Yuxin Fan,Yueling Zhang,Wenwen Ma,Tingdong Zhang,Zhaoli Zeng,Yichun Zhou,Xiaoming Shi,Aiji Wang

{"title":"Persistent Ferroelectric Retention of Ferroelectric BiFeO3 Thin Films.","authors":"Yu Tian,Jiajia Liao,Yuxin Fan,Yueling Zhang,Wenwen Ma,Tingdong Zhang,Zhaoli Zeng,Yichun Zhou,Xiaoming Shi,Aiji Wang","doi":"10.1021/acs.nanolett.5c04334","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c04334","url":null,"abstract":"Ferroelectrics exhibiting robust and controllable polarization have attracted significant attention for next-generation memory technologies. However, these materials are often plagued by polarization relaxation within days to weeks. Here, we demonstrate exceptional long-term stability in as-grown mosaic-domain BiFeO3 thin films, showing virtually no measurable degradation in electro-writing nanodomains over 1 year (a >200 times improvement versus conventional uniform-domain ferroelectrics). Notably, scanning transmission electron microscopy and scanning probe microscopy reveal that the high-quality film achieves permanent polarization retention while preserving low operational voltage (5 V), half the voltage of previous ferroelectrics with comparable polarization retention. The thermodynamically balanced energy landscape of upward/downward polarization states within the mosaic domains stabilizes written domains without increasing the polarization switching activation field, dissolving the trade-off between energy efficiency and stability. These findings pave the pathway for high-density and low-energy-consumption ferroelectric memory and advanced multifunctional nanodevices.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"1 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2025-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145319164","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Morphology-Engineered CaCO3 Enabling Dual-Mode Nanocomposites for Zonal Radiative Cooling and Heating. 形态工程CaCO3实现双模纳米复合材料的区域辐射冷却和加热。

IF 13.3 2区材料科学

Small Pub Date : 2025-10-19 DOI: 10.1002/smll.202509710

Xuran Li,Xueming Fan,Ruilin Yang,Hongjian Guan,Peng Lian,Wenxin Zeng,Yang Wang,Yuanjie Su,Huiling Tai,Yadong Jiang,Weizhi Li

{"title":"Morphology-Engineered CaCO3 Enabling Dual-Mode Nanocomposites for Zonal Radiative Cooling and Heating.","authors":"Xuran Li,Xueming Fan,Ruilin Yang,Hongjian Guan,Peng Lian,Wenxin Zeng,Yang Wang,Yuanjie Su,Huiling Tai,Yadong Jiang,Weizhi Li","doi":"10.1002/smll.202509710","DOIUrl":"https://doi.org/10.1002/smll.202509710","url":null,"abstract":"Passive radiative cooling (PRC) and passive radiative heating (PRH) have emerged as promising strategies for low-energy temperature control technology. However, conventional materials fall short in addressing the challenges posed by regionalized thermal control. In response, a dual-mode film capable of delivering both high-performance PRC and PRH is demonstrated. On the cooling side, a gradient densified structure is constructed by precisely controlling the size distribution of spherical calcium carbonate (CaCO3) and optimizing packing density within the PDMS matrix, resulting in a film with average solar reflectance of 95.2% and infrared emissivity of 96.7%. The heating side features a hierarchically structured PDMS/carbon nanotubes (CNTs) absorber templated from urchin-like CaCO3, further integrates with a polyethylene terephthalate/indium tin oxide (PET/ITO) infrared suppression layer to enhance solar absorption and minimize thermal radiation losses. The heating side achieves an average 30.2% solar reflectance and 2.5% infrared emissivity, demonstrating its excellent radiative heating properties. The dual-mode film achieves average subambient cooling of 7.6 °C and heating of 3.6 °C under sunny and cloudy conditions. The synergistic enhancement of cooling and heating can be achieved by adjusting the orientation of each mode in building applications, providing a novel approach for a low-energy, high-efficiency, and intelligent building thermal control system.","PeriodicalId":228,"journal":{"name":"Small","volume":"142 1","pages":"e09710"},"PeriodicalIF":13.3,"publicationDate":"2025-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145319235","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

One Stone Two Birds: Enhancing Energy Density and Temperature Adaptability for Vanadium-based Redox Flow Batteries via Dual Active Species Strategy 一石两鸟：通过双活性物种策略提高钒基氧化还原液流电池的能量密度和温度适应性

IF 20.4 1区材料科学

Energy Storage Materials Pub Date : 2025-10-19 DOI: 10.1016/j.ensm.2025.104693

Jinhui Ying, Huijia Li, Xiongjie Jia, Zihan Yu, Tianshou Zhao, Haoran Jiang

{"title":"One Stone Two Birds: Enhancing Energy Density and Temperature Adaptability for Vanadium-based Redox Flow Batteries via Dual Active Species Strategy","authors":"Jinhui Ying, Huijia Li, Xiongjie Jia, Zihan Yu, Tianshou Zhao, Haoran Jiang","doi":"10.1016/j.ensm.2025.104693","DOIUrl":"https://doi.org/10.1016/j.ensm.2025.104693","url":null,"abstract":"Vanadium-based redox flow batteries, characterized by no cross-contamination issue, are considered as one of the most promising candidates for large-scale energy storage. However, due to vanadium ions show relatively low solubility and are easy to precipitate at extreme temperatures, the battery suffers from the long challenge of low energy density and poor temperature adaptability. In this work, by introducing vanadium and bromine dual active species into the positive electrolyte, a novel V/V-Br redox flow battery (VBrRFB) is developed to boost the energy density and temperature window of vanadium-based flow batteries. The bromine, not only acts as the secondary redox couple to enhance the overall concentration of active species, but also disrupts the hydrogen bond network while optimizing the solvation structure of vanadium. As a result, the VBrRFB achieves an energy density of as high as 152.4 Wh L<sup>-1</sup><sub>catholyte</sub> (38.1 Wh L<sup>-1</sup><sub>catholyte+anolyte</sub>), which is 265.9% higher than traditional all-vanadium redox flow batteries, while maintaining stable cycling over 250 cycles with an energy efficiency of 82.5%. Additionally, the VBrRFB exhibited excellent stability and performance from -10°C to 50°C, with energy densities of 107.6 Wh L<sup>-1</sup><sub>catholyte</sub> at 50 °C and 88.8 Wh L<sup>-1</sup><sub>catholyte</sub> at -10 °C, demonstrating its strong potential for practical energy storage.","PeriodicalId":306,"journal":{"name":"Energy Storage Materials","volume":"116 1","pages":""},"PeriodicalIF":20.4,"publicationDate":"2025-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145314833","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Production-Ready Double-Sided Fabrication of Dual-Band Infrared Metaoptics Using Deep-Ultraviolet Lithography 利用深紫外光刻技术制备双波段红外元光学器件

IF 17.1 1区材料科学

ACS Nano Pub Date : 2025-10-19 DOI: 10.1021/acsnano.5c11908

Kai Sun, Xingzhao Yan, Jordan Scott, Jun-Yu Ou, James N. Monks, Otto L. Muskens

{"title":"Production-Ready Double-Sided Fabrication of Dual-Band Infrared Metaoptics Using Deep-Ultraviolet Lithography","authors":"Kai Sun, Xingzhao Yan, Jordan Scott, Jun-Yu Ou, James N. Monks, Otto L. Muskens","doi":"10.1021/acsnano.5c11908","DOIUrl":"https://doi.org/10.1021/acsnano.5c11908","url":null,"abstract":"Metaoptics, the application of metasurfaces into optical systems, is seeing an accelerating development owing to advantages in size, weight, and cost and the ability to program optical functions beyond traditional refractive optics. The transition of metaoptics from the laboratory into applications is enabled by scalable production methods based on highly reproducible semiconductor process technology. Here, we introduce a method for the fabrication of double-sided metasurfaces through deep-UV lithography as a production-ready method for achieving high-quality metaoptics. We achieve patterning of a silicon wafer on both sides with mutual alignment of around 10 μm based on tool accuracy without requiring through-wafer alignment markers other than the wafer notch. An application highlighting the benefits of double-sided design is demonstrated in the form of a dual-band metalens with independent control over focal lengths in mid- and long-wavelength infrared bands. Using multireticle stitching, we demonstrate a 40 mm diameter, large-area metalens with excellent broadband imaging performance, showing partial canceling of chromatic dispersion when used in a hybrid configuration with a BaF<sub>2</sub> refractive lens. Our work establishes a production-ready approach to infrared metaoptics designs and double-sided metaoptics fabrication with direct potential for translation into scalable technology for real-world applications.","PeriodicalId":21,"journal":{"name":"ACS Nano","volume":"98 1","pages":""},"PeriodicalIF":17.1,"publicationDate":"2025-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145314662","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Chiral Two-Dimensional Cu-Pb Bromides: Circularly Polarized Luminescence and Pressure-Enhanced Optical Properties. 手性二维Cu-Pb溴化物：圆偏振发光和压力增强光学性质。

IF 17.1 1区材料科学

ACS Nano Pub Date : 2025-10-19 DOI: 10.1021/acsnano.5c14764

Peiran Xie,Congcong Chen,Pan Wang,Jiawei Lin,Kejun Bu,Tonghuan Fu,Songhao Guo,Hengqian Zhang,Xiao-Wu Lei,Xujie Lü,Lingling Mao

{"title":"Chiral Two-Dimensional Cu-Pb Bromides: Circularly Polarized Luminescence and Pressure-Enhanced Optical Properties.","authors":"Peiran Xie,Congcong Chen,Pan Wang,Jiawei Lin,Kejun Bu,Tonghuan Fu,Songhao Guo,Hengqian Zhang,Xiao-Wu Lei,Xujie Lü,Lingling Mao","doi":"10.1021/acsnano.5c14764","DOIUrl":"https://doi.org/10.1021/acsnano.5c14764","url":null,"abstract":"The search for high-performance double perovskite-related materials remains constrained by the limited synthetic accessibility of bimetallic halides compared to their conventional halide double perovskite counterparts, leaving substantial unexplored territory in this domain. A promising structural modification strategy involves the incorporation of chiral organic moieties into the metal halide frameworks, enabling precise engineering of noncentrosymmetric structures toward targeted functional properties. Here, we report a pair of chiral two-dimensional (2D) Cu(I)-Pb bimetallic bromides (R/S-PCA)4Cu2PbBr8·H2O (R/S-CuPbBr, R/S-PCA = R/S-3-piperidinecarboxylic acid) and investigate their behavior under external stimuli including pressure and temperature. The R/S-CuPbBr compounds crystallize in a noncentrosymmetric monoclinic C2 space group, consisting of inorganic bimetal [Cu2PbBr8] layers and organic layers formed via hydrogen bonding interactions. For comparison, another pair of 2D Pb-based bromides (R/S-PCA)3Pb2Br7·H2O (R/S-PbBr) was synthesized, crystallizing in the noncentrosymmetric orthorhombic P212121. These materials exhibit broadband yellow emission and circularly polarized luminescence emission at room temperature. The glum values of R/S-CuPbBr and R/S-PbBr are 8.63 × 10-3 and -7.99 × 10-3, 4.33 × 10-3 and -3.52 × 10-3, respectively. Density functional theory (DFT) calculations reveal R/S-CuPbBr and R/S-PbBr are indirect and direct bandgap semiconductors, respectively. More importantly, R-CuPbBr exhibits dramatic enhancements in optical properties under high pressure, with an 8-fold increase in photoluminescence and 44-fold boost in second-harmonic generation at elevated pressure.","PeriodicalId":21,"journal":{"name":"ACS Nano","volume":"78 1","pages":""},"PeriodicalIF":17.1,"publicationDate":"2025-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145319134","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Asymmetric Mechano-Electrochemical Energy Harvesting System with Surface Charge-Modified Carbon Nanotube Yarn for Wearable Devices. 用于可穿戴设备的表面电荷修饰碳纳米管纱不对称机械-电化学能量收集系统。

IF 13.3 2区材料科学

Small Pub Date : 2025-10-19 DOI: 10.1002/smll.202508487

Gyu Hyeon Song,Dong Yeop Lee,Hocheol Gwac,Ji Hwan Moon,Jae Sang Hyeon,Jinyeong Choi,Hyemin Kim,Youngjin Jeong,Changsoon Choi,Seon Jeong Kim

{"title":"Asymmetric Mechano-Electrochemical Energy Harvesting System with Surface Charge-Modified Carbon Nanotube Yarn for Wearable Devices.","authors":"Gyu Hyeon Song,Dong Yeop Lee,Hocheol Gwac,Ji Hwan Moon,Jae Sang Hyeon,Jinyeong Choi,Hyemin Kim,Youngjin Jeong,Changsoon Choi,Seon Jeong Kim","doi":"10.1002/smll.202508487","DOIUrl":"https://doi.org/10.1002/smll.202508487","url":null,"abstract":"Mechano-electrochemical harvesters are being explored for various applications, including wearable and implantable devices. However, their application in practical devices still requires the development of a structurally optimized two-electrode system to avoid mutual voltage cancellation. Herein, the two-electrode system is improved by enhancing individual electrode performance and resolving voltage cancellation through polarity-controlled electrode design via asymmetric surface charge modification. When negatively charged poly(sodium-4-styrenesulfonate) and positively charged (vinylbenzyl)trimethylammonium chloride are coated on the carbon nanotube (CNTs), the potential of zero charge (PZC) shifted toward the positive and negative directions, respectively. This shift in PZC alteres the configuration of the electric double layer and reverses the direction of the voltage generated at each electrode. Thus, when the two electrodes are stretched simultaneously, the maximum open-circuit voltage reaches 294.4 mV, which is significantly higher than that of the symmetric configuration, which yieldes only 4.7 mV owing to the voltage cancellation. This enhancement originates from both the increased intrinsic bias voltage, which amplifies voltage generation at each electrode, and the summation of the voltages generated by the two electrodes. For practical applications, an asymmetric harvester is fabricated as a one-body structure that can be woven into textiles, providing a compact and efficient solution for energy harvesting.","PeriodicalId":228,"journal":{"name":"Small","volume":"28 1","pages":"e08487"},"PeriodicalIF":13.3,"publicationDate":"2025-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145319135","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

Pt Nanoparticle Disintegration at Oxide Interfaces Enhances CO Oxidation Catalysis. 铂纳米颗粒在氧化物界面上的分解增强了CO氧化催化作用。

IF 13.3 2区材料科学

Small Pub Date : 2025-10-19 DOI: 10.1002/smll.202506990

Eunji Kang,Jieun Yun,Hyuk Choi,Mi Yoo,Ju Hyeok Lee,Hongjin Park,Jin-Seok Choi,Kug-Seung Lee,David A Shapiro,Alex Ditter,Bob Jin Kwon,Chunjoong Kim,Young-Sang Yu,Hyun You Kim

{"title":"Pt Nanoparticle Disintegration at Oxide Interfaces Enhances CO Oxidation Catalysis.","authors":"Eunji Kang,Jieun Yun,Hyuk Choi,Mi Yoo,Ju Hyeok Lee,Hongjin Park,Jin-Seok Choi,Kug-Seung Lee,David A Shapiro,Alex Ditter,Bob Jin Kwon,Chunjoong Kim,Young-Sang Yu,Hyun You Kim","doi":"10.1002/smll.202506990","DOIUrl":"https://doi.org/10.1002/smll.202506990","url":null,"abstract":"Understanding how supported metal nanoparticles dynamically evolve under reaction conditions is critical for controlling their catalytic function. Here, the mechanism behind the dynamic disintegration of Pt nanoparticles (NPs) supported on CeOx-TiO2 (CT) during CO oxidation is elucidated, leading to the formation of single atoms (SAs) and/or sub-nanometer clusters. Density functional theory (DFT) calculations reveal that strong Pt-CO interactions weaken Pt─Pt cohesion, while electronic coupling between Pt and Ce ions stabilizes Pt-CO* intermediates at the oxide interface. Surface oxygen vacancies kinetically trap Pt-CO*, but the vacancies are replenished under oxygen-rich conditions, enabling Pt-CO* surface diffusion and subsequent structural reorganization. In situ spectroscopic analyses confirm the oxygen-driven transformation of Pt NPs, correlating with a threefold increase in mass-specific activity at 150 °C. These findings demonstrate that interfacial oxygen dynamics and metal-support interactions can be leveraged to induce nanoparticle disintegration and optimize catalytic performance, highlighting the catalytic potential of interface-engineered Pt nanostructures.","PeriodicalId":228,"journal":{"name":"Small","volume":"8 1","pages":"e06990"},"PeriodicalIF":13.3,"publicationDate":"2025-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145319162","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

Surface modifications of superparamagnetic iron oxide nanoparticles with citric acid, selenium, and silver combining with polymer blend as antibacterial agent 柠檬酸、硒和银与聚合物共混物作为抗菌剂对超顺磁性氧化铁纳米颗粒进行表面改性

IF 4.1 3区材料科学

Nanoscale Research Letters Pub Date : 2025-10-19 DOI: 10.1186/s11671-025-04372-x

Linh Doan, Tu M. D. Nguyen, Quynh N. Le, Khanh G. Huynh, Khoa Tran, Nguyen H. V. Pham

{"title":"Surface modifications of superparamagnetic iron oxide nanoparticles with citric acid, selenium, and silver combining with polymer blend as antibacterial agent","authors":"Linh Doan, Tu M. D. Nguyen, Quynh N. Le, Khanh G. Huynh, Khoa Tran, Nguyen H. V. Pham","doi":"10.1186/s11671-025-04372-x","DOIUrl":"10.1186/s11671-025-04372-x","url":null,"abstract":"<div><p>Antibiotic resistance is a growing global health crisis. This study introduces a novel nanocomposite material incorporating superparamagnetic iron oxide nanoparticles (SPION), citric acid (CA), selenium (Se), silver (Ag), and a polymer matrix (M8) consisting of polyethylene glycol, polyvinylpyrrolidone, chitosan, and polyvinyl alcohol. The novel materials were used to inhibit <i>Pseudomonas aeruginosa</i> (PA), <i>Staphylococcus aureus</i> (SA), and <i>Salmonella enterica</i> (SE). The optimal molar ratio of SPION:CA: CSPION:Se: CSPION/Se/Ag was 1:2:0.5, yielding nanoparticles with an average size of 15.09 ± 2.95 nm (FE-SEM) and a saturation magnetization of 21.51 emu/g (VSM). XRD confirmed the coexistence of Fe₃O₄, Se, and Ag crystalline phases, while FTIR revealed ionic and hydrogen bonding interactions between the polymers, citric acid, and metal nanoparticles. EDS analysis validated the successful incorporation of Se (7.06 wt%) and Ag (22.00 wt%). At this ratio, the inhibition percentage against PA, SA, and SE (using the minimum inhibitory concentration method) at 50% dilution is 99.99 ± 0.52%, 99.31 ± 2.74%, and 47.41 ± 3.69%, respectively. The superior performance is attributed to synergistic effects between SPION, Se, Ag, and the polymer blend, offering a promising approach for combating antibiotic-resistant bacteria.</p></div>","PeriodicalId":51136,"journal":{"name":"Nanoscale Research Letters","volume":"20 1","pages":""},"PeriodicalIF":4.1,"publicationDate":"2025-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1186/s11671-025-04372-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145316482","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fabrication of tunable Large-Area Moth-Eye nanostructures for antireflection and hydrophobicity via anodic aluminum oxide templates and nanoimprint lithography 利用阳极氧化铝模板和纳米压印光刻技术制备可调谐大面积蛾眼抗反射和疏水性纳米结构

IF 4.1 3区材料科学

Nanoscale Research Letters Pub Date : 2025-10-19 DOI: 10.1186/s11671-025-04373-w

Hsuan-Hao Hung, Shi-Kai Lin, Ru-Xue Lin, Tzu-Ning Huang, Chia-Che Wu

{"title":"Fabrication of tunable Large-Area Moth-Eye nanostructures for antireflection and hydrophobicity via anodic aluminum oxide templates and nanoimprint lithography","authors":"Hsuan-Hao Hung, Shi-Kai Lin, Ru-Xue Lin, Tzu-Ning Huang, Chia-Che Wu","doi":"10.1186/s11671-025-04373-w","DOIUrl":"10.1186/s11671-025-04373-w","url":null,"abstract":"<div><p>In this study, a comprehensive process–structure–function roadmap was established for bio-inspired functional surfaces. We systematically controlled the pore diameter, interpore distance, pore depth, and pore aspect ratio of anodic aluminum oxide (AAO) master templates via multistep anodization. These templates were then replicated in durable nickel–cobalt alloy working molds through electroforming, and their nanostructures were transferred to polycarbonate films using nanoimprint lithography. Our findings highlighted the critical influence of pre-anodization, electrolyte type (oxalic acid for an ~ 100 nm interpore distance; phosphoric acid for ~ 400 nm), anodization potential, and time on the AAO structures. We also identified 100 A/m<sup>2</sup> as the optimal current density for achieving high-aspect-ratio structures under intense anodization. The polymer film replicas obtained using these precisely controlled templates showed significantly enhanced functional properties: the average surface reflectance decreased from 10.85% to a minimum of 3.5%, transmittance increased from 80.1 to 92.3%, and water contact angles improved from 91.46 to 138.69°. Thus, a higher structural aspect ratio is crucial for enhanced hydrophobic performance, consistent with the Cassie–Baxter model. In summary, this research provides an efficient, controllable method for manufacturing high-performance bio-inspired functional surfaces and, more critically, establishes direct correlations between anodization parameters and the resulting optical and wetting properties, offering key guidance for material design.</p></div>","PeriodicalId":51136,"journal":{"name":"Nanoscale Research Letters","volume":"20 1","pages":""},"PeriodicalIF":4.1,"publicationDate":"2025-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1186/s11671-025-04373-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145316483","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Broad-spectrum light-induced bending, fracture, delamination, and jumping in a phenanthrene-modified barbituric acid crystal 广谱光诱导的弯曲、断裂、分层和跳跃在菲改性巴比妥酸晶体中

IF 4.2 3区工程技术

Dyes and Pigments Pub Date : 2025-10-19 DOI: 10.1016/j.dyepig.2025.113347

Jing Yang , Jieting He , Jiang Peng

{"title":"Broad-spectrum light-induced bending, fracture, delamination, and jumping in a phenanthrene-modified barbituric acid crystal","authors":"Jing Yang , Jieting He , Jiang Peng","doi":"10.1016/j.dyepig.2025.113347","DOIUrl":"10.1016/j.dyepig.2025.113347","url":null,"abstract":"<div><div>Sunlight-responsive organic crystals remain exceedingly rare due to the broad spectral distribution and low intensity of natural light. Herein, we report a yellow, needle-like crystal of a phenanthrene-modified barbituric acid derivative (<strong>DPPT</strong>) that exhibits photomechanical behaviors—including bending, fracture, and light-triggered jumping—under natural sunlight, white light, and monochromatic irradiation at 365 nm, 450 nm and 532 nm, with the unique additional feature of surface delamination occurring specifically under 365 nm UV light. Variable-time <sup>1</sup>H NMR spectroscopy, together with time-resolved PXRD and Raman analyses, revealed that these mechanical responses originate from light-induced conformational rearrangements within the <strong>DPPT</strong> molecules. Upon irradiation, surface-localized molecular rearrangement generates anisotropic internal stress, leading to backward bending, and under higher light doses, fracture induces crystal projection. In particular, the higher photon energy of 365 nm irradiation disrupts interlayer C–H⋯O interactions, giving rise to surface delamination prior to fracture. Notably, these complex motions are achieved in a single-component molecular system, without any need for interfaces, composites, or multilayer architectures. This work introduces a minimalist and efficient molecular design for achieving sunlight-driven actuation, offering a promising platform for the development of next-generation photomechanical actuators and intelligent light-responsive materials.</div></div>","PeriodicalId":302,"journal":{"name":"Dyes and Pigments","volume":"246 ","pages":"Article 113347"},"PeriodicalIF":4.2,"publicationDate":"2025-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145326104","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0