ADVANCED MATERIALS
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2024
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IF 27.4
Dandan Yan,Wenjing Xu,Tingting Zou,Lin Li,Jiapei Xu,Ruizhi Zhang,Longjin Hu,Xupeng Yang,Hui Ma,Jianjun Yang
The chemical instability of traditional organically-decorated superhydrophobic metal surfaces is a significant issue, severely limiting practical applications. This is due to the susceptibility of low surface energy coatings to ion permeation, decomposition, and exfoliation, especially in harsh environments. Here, organic coating-free, durable superhydrophobic surfaces on Al alloys by developing the paracrystalline state of a bionic anthill tribe structure is successfully achieved, using femtosecond laser element-doping microstructuring followed by repetitive annealing processes. Remarkably, the inherent superhydrophobic properties of the sample are maintained for ≈2000 h in a corrosive 3.5 wt.% NaCl aqueous solution, significantly surpassing the performance of traditional organic coatings. Moreover, this inherent superhydrophobicity remains nearly unchanged, even after rigorous electrochemical reaction measurements. Additional tests involving UV irradiation (>100 h), freezing cycles (>100 cycles), and acid/alkali resistance (>65 h) further demonstrate that the environmental adaptability of the surface far exceeds that of silane-coated surfaces. Ab initio calculations reveal that the formation of the paracrystalline state reduces surface energy and enhances chemical stability, thereby extending the durability of the superhydrophobic metal. These findings offer a powerful strategy for utilizing atomic-level structural rearrangements to design inherent superhydrophobic surfaces without the need for organic coatings.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Energy Materials
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2025
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IF 5.5
Liang Li,Piyu Gong,Yan Zhang,Congcong Liang,Zeyan Wang,Peng Wang,Yuanyuan Liu,Hefeng Cheng,Ying Dai,Zhaoke Zheng,Baibiao Huang
Solar-driven hydrogen production is considered a promising solution to the current energy crisis and environmental pollution. The efficiency of photocatalytic water splitting for hydrogen production can be improved by constructing an effective biphase photocatalytic system. In this study, laser-ablated wood was used as a photothermal substrate that effectively generates water vapor below the boiling point of water. When integrated with TiO2 in a photothermal–photocatalytic system, it achieves a hydrogen production rate of 42.4 mmol m–2 h–1 under an irradiance of 3 kW m–2. To obtain a photothermal substrate with high evaporation efficiency, nanosecond infrared (ns IR) laser ablation was employed to treat the surface of the wood, leveraging its strong thermal effects to cleave the C–C bonds in lignin and other polymers. This process resulted in instantaneous selective oxidation to CO, exposing the internal pore structure of the wood. Additionally, laser ablation enhanced the carbonization of the surface of the wood, leading to improved light absorption and water evaporation performance of the ablated wood. FT-IR analysis revealed a strong interaction between the hydroxyl groups on the surface of the laser-ablated wood and TiO2 through hydrogen bonding, effectively preventing the detachment of the photocatalyst. This solid–gas biphase system, consisting of photocatalyst, water vapor, and hydrogen, exhibits lower reaction resistance and significantly enhances catalytic activity, highlighting its great potential for future applications in solar-driven hydrogen production.
研究领域:
能源科学
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材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Physical Chemistry C
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2019
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IF 4.309
Ying Zhang,Haiou Zhu,Jilin Zheng,Guangyue Chai,Zongpeng Song,Yanping Chen,Yuanhai Liu,Siyu He,Yongqiang Shi,Yumin Tang,Meng Wang,Wenwen Liu,Lingfeng Jiang,Shuangchen Ruan
Perovskite quantum dots (QDs) have gained significant attention for both fundamental research and commercial applications because of their outstanding optoelectronic properties and tremendous application potentials. Reducing defect density in all-inorganic perovskite QDs is of great importance for performance enhancement. In this work, it is found that the UV-NIR femtosecond laser pulse treatments could increase the photoluminescence quantum yield (PLQY) of the CsPbBr3 perovskite QDs from 71 to 95%. Such an enhancement could be attributed to decrease of the defects after laser exposure, which is consistent with its red-shifted PL and other characterization results. Furthermore, the dynamics of energy transfer from exciton to trapping in irradiated CsPbX3 QDs are studied to gain an insight into the relative strength of exciton-trapping exchange coupling. The results confirm that the trapping defects are decreased by laser irradiation, and the mechanism leading to the enhancement of PLQY is revealed. In addition, the enhanced stability of laser-irradiated CsPbX3 QDs is also testified. Finally, the application of laser-treated perovskite QDs in the liquid crystal display (LCD) backlight film is successfully demonstrated. It is further anticipated that this mechanism is helpful for the design of perovskite-based optoelectronic applications such as LCD technology and light-emitting devices.
研究领域:
材料科学
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光电子学
✓ 已验证
产品关联
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
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2023
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IF 5.4
Weizhou Li,Quanzhi Chen,Deli Shen,Ruixia Yang,Xiuhai Zhang
In order to decrease defects and improve protective performance, micro-arc oxidation (MAO) coating was modified by adding SiO 2 particles to form a composite coating on TA2 alloy via laser treatment. The microstructural morphology, phase structure, cohesive strength and corrosion resistance of the composite coatings were investigated and analyzed by using SEM, XRD , thermal cycle, and electrochemical testing, respectively. The results showed that SiO 2 particles were firstly adsorbed onto the MAO surface with the aid of ultrasonic treatment and then sealed micro-pores of the MAO coating after laser treatment. The composite coating mainly consisted of R-TiO 2 , A-TiO 2 and SiO 2 phases and exhibited a dense multilayer structure with a rich Si element in the outer layer. After subjecting the coatings to 300 thermal cycles, clacking or marked spalling zones could not be observed in the composite coating; nevertheless, an obvious destruction appeared in the single MAO coating without SiO 2 particles. The corrosion potential ( E corr ) and pitting potentials ( E pit ) of the composite coating were −0.303 V and 1.765 V compared to that of −0.682 V and 1.401 V for the single MAO coating. Additionally, the corrosion rate decreased to 1.40 × 10 −4 A·cm −2 with the highest resistance (76,788.67 Ω·cm 2 ) from2.19 × 10 −4 A·cm −2 , indicating a stronger corrosion resistance in the composite coating. The results of simulation from Comsol Multiphysics demonstrated that a laser power as 80 W was appropriate for melting SiO 2 particles into the MAO coating to form a dense and cohesive composite coating.
研究领域:
材料科学
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表面工程
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腐蚀与防护
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2022
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IF 10.319
Yaopeng Wu,Jinghong Chen,Wei Yuan,Xiaoqing Zhang,Shigen Bai,Yu Chen,Bote Zhao,Xuyang Wu,Chun Wang,Honglin Huang,Yong Tang,Zhenping Wan,Shiwei Zhang,Yingxi Xie
Graphene-based electrodes with rational structural design have shown extraordinary prospect for enhanced electrical double-layer capacitance of micro-supercapacitors (MSCs). Herein, a facile fabrication method for flexible planar MSCs based on hierarchical graphene was demonstrated by using a laser-treated membrane for electrode patterning, complemented with hierarchical electrode configuration taking full advantages of size-determined functional graphene. The in-plane interdigital shape of MSCs was defined through vacuum filtration with the assistance of the functionalized polypropylene (PP) membrane. The hierarchical graphene films were built by macroscopic assembly based on size effect of different lateral sized graphene sheets (rGO-LSL). The sample of MSCs based on rGO-LSL (MSCs-LSL) exhibited excellent volumetric capacitance of 6.7 F cm −3 and high energy density of 0.37 mWh cm −3 . The MSCs-LSL presented superb flexibility and cycling stability with no capacitance deteroriated after 2000 cycles. This newly developed fabrication strategy is of good scalability and designability to manufacture flexible electrode for MSCs with customized shapes, while the construction of hierarchical graphene can enlighten the structural design of analogous two-dimensional materials for potential advanced electronics.
研究领域:
材料科学
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纳米技术
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能源存储
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
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2025
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IF 6.9
Chong Shan,Zhiwei He,Erxi Wang,Xiaohui Zhao,Zhan Sui,Jianjun Cao
A biomimetic superhydrophobic surface was fabricated on single-crystal 4H-SiC using a two-step femtosecond laser processing strategy followed by surface silanization. Drawing inspiration from the micro/nanostructures of butterfly wings and shark skin, a hybrid hierarchical architecture was engineered by first generating microscale grid patterns and then inscribing small grooves within each grid cell. This morphology significantly enhanced surface roughness and provided the structural basis for wettability modulation. Systematic characterization revealed that laser-induced oxidation introduced abundant polar functional groups, resulting in superhydrophilicity, which was subsequently converted into superhydrophobicity (water contact angle ∼ 154°) via octyltriethoxysilane (OTES) modification. The resulting surface exhibited excellent robustness to processing parameters, with superhydrophobicity achieved across a wide range of laser powers (30–110 mW) and grid spacings (50–150 μ m ). EDS and XPS analyses confirmed the transformation of polar oxide species into nonpolar chemical groups following modification. Functional demonstrations showed that the fabricated surface possessed strong self-cleaning and anti-icing capabilities, with water droplets rapidly rolling off to remove contaminants and delaying ice nucleation by over threefold compared to untreated SiC. This work provides a scalable, maskless, and environmentally friendly approach to functionalize SiC surfaces, paving the way for their application in harsh environments such as aerospace, microfluidics, and power electronics.
研究领域:
材料科学
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应用物理
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纳米技术
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表面工程
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仿生学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
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2022
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IF 6.14
Yi Wei,Jun Chen,Lumeng Liang,Jiaxin Wang,Haibo Zeng
Inorganic hybrid perovskites have attracted considerable research interest for next-generation display materials, which makes them good candidates for optoelectronic devices, but many problems have restricted their development, such as instability, anion exchange, and so on. Here, we demonstrate a laser treatment process on perovskite nanocrystal (NC) films that can help to solve these problems in perovskite devices. The perovskite NC film was successfully laser-modified and patterned via laser direct writing. During the laser-direct-writing process, we explored the influence of laser illumination on inorganic perovskite NCs and developed dual-color luminescent perovskite NC films, which provide great potential for the development of display areas.
研究领域:
材料科学
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光电子学
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纳米技术
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显示技术
✓ 已验证
DOI
高影响因子
LANGMUIR
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2021
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IF 3.882
Ying Wang,Xingyi Zhou,Minhao Yin,Jibin Pu,Ningyi Yuan,Jianning Ding
Both a superhydrophobic structure and layered double hydroxide (LDH) coating were effective to improve the corrosion resistance of alloys. In this study, a superhydrophobic composite coating based on LDHs was constructed on Mg alloy by laser treatment, in situ growth of Mg-Al LDHs, and modification with octadecyl-trimethoxy-silane (OTS). The so-obtained composite coating was coded as L-LDHs-OTS, where L stands for laser treatment. Results showed that the L-LDHs-OTS composite coating presented the best anti-corrosion performance and the corrosion current density was reduced by about 5 orders of magnitude compared with that of the Mg alloy substrate. The excellent corrosion resistance was related to the superhydrophobicity of the composite coating, the compactness and ion-exchange capacity of the LDH layer, and the dense Si-O-Si network within the OTS layer. Moreover, the L-LDHs-OTS composite coating was still effective after 20 days of immersion tests, showing good long-term corrosion resistance due to the existence of hydrophobicity of the composite coating and the self-healing ability of LDHs.
研究领域:
材料科学
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腐蚀工程
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表面工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）