MATERIALS & DESIGN
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2016
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IF 3.997
Qiang Wang,Bing Dai,Jie Bai,Zhenhuai Yang,Shuai Guo,Yujie Ding,Lei Yang,Pei Lei,Jiecai Han,Jiaqi Zhu
A simple and efficient strategy is introduced for fabricating a layer of superhydrophobic and superoleophilic membrane on the surface of porous materials by self-assembly, and it is of great interest for the new type separation of oil and water. It is realized in this study by synthesizing an array of vertically aligned composite microcones on the surface of nickel foam by microwave plasma assisted chemical vapor deposition . The hierarchical structure, high aspect ratio , and dual-scale pine tree-like nature of the microcones formed on the nickel foam, which has microscale pores, in combination with the low surface energy of carbon, amplify both the hydrophobicity and the oleophilicity of the membrane. In addition, the membrane exhibits pH-responsivity, and the controllable water permeation can be realized by simply altering the water pH. Given its extremely high hydrophobicity and oleophilicity as well as outstanding mechanical durability, the composite frame can be used as a filter to separate oil/water mixtures and as an intelligent sponge to purify oil-contaminated water with excellent separation efficiency and absorption capacity . It should also be ideal for real world use in various environmental and chemical separation processes.
研究领域:
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
Small
·
2024
·
IF 13
Jiajun Yang,Guang Liu,Kaiteng Zhang,Ping Li,Haipeng Yan,Yu Yan,Yingdong Zheng,Zehui Zhao,Liwen Zhang,Xiaolin Liu,Guang Yang,Huawei Chen
Precisely controlling the directional motion trajectories of droplets on anisotropic 3D functional surfaces has great application potential in self-cleaning, drug delivery, and droplet power generation, but it also faces huge challenges. Herein, inspired by the microcone structure in the heart of sunflowers, a nanoneedle-modified microcone array surface (NMAS) is reported. The surface is created using a combination of nanosecond laser direct engraving and electroforming and is subsequently fluorinated. Through programmable control of the laser spot, the geometric parameters and inclination angle of the microcone can be quickly and finely adjusted, thereby achieving precise control of the droplet bouncing trajectory. The results show that droplets can achieve programmable multiple bouncing behaviors on patterned functional surfaces, including gravity-defying hopping and directional water transport. It is worth noting that this functional surface has delayed freezing and anti-freezing effects. Furthermore, this functional surface has a wide range of potential applications, including surface self-cleaning, droplet capture, and droplet-based chemical microreactions, especially in the field of anti-icing operations. This opens up a new way for the directional transport of droplets on biomimetic functional surfaces.
研究领域:
材料科学
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仿生学
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表面工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Small
·
2022
·Vol. 18
·期 25
·2202400
·
IF 15.153
Zhenmin Ding,Lorenzo Pattelli,Hongbo Xu,Wenhai Sun,Xin Li,Lei Pan,Jiupeng Zhao,Chengyu Wang,Xiang Zhang,Ying Song,Jun Qiu,Yao Li,Ronggui Yang
Coatings for passive radiative cooling applications must be highly reflected in the solar spectrum, and thus can hardly support any coloration without losing their functionality. In this work, a colorful daytime radiative cooling surface based on structural coloration is reported. A designed radiative cooler with a bioinspired array of truncated SiO 2 microcones is manufactured via a self-assembly method and reactive ion etching. Complemented with a silver reflector, the radiative cooler exhibits broadband iridescent coloration due to the scattering induced by the truncated microcone array while maintaining an average reflectance of 95% in the solar spectrum and a high thermal emissivity (ε) of 0.95, owing to the reduced impedance mismatch provided by the patterned surface at infrared wavelengths, reaching an estimated cooling power of ≈143 W m –2 at an ambient temperature of 25 °C and a measured average temperature drop of 7.1 °C under direct sunlight. This strong cooling performance is attributed to its bioinspired surface pattern, which promotes both the aesthetics and cooling capacity of the daytime radiative cooler.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Zhixin Wang,Yuanpeng Fu,Tianzhao Bu,Yuqi Qiu,Bo Pang,Qingyang Zheng,Sen Zhou,Yangyang Li,Xiling Xiao,Zhouping Yin,Hao Wu
Quantitative and objective assessment of muscle spasticity grades in post-stroke patients plays a pivotal role for physicians and patients in adjusting rehabilitation plans and preventing secondary complications. However, the development of such methods for spasticity detection and assessment is hindered by the subjectivity of conventional assessment methods, the limited clinical applicability of digital-devices, and the structural complexity of sensors used for monitoring muscle strength. Here, a multimodal on-skin sensor is developed, enabling simultaneous acquisition of surface electromyography (sEMG) and triboelectric signals, through wavelet analysis, the signal from the sensor can comprehensively reflect the bioelectrical and biomechanical characteristics of human motion. The high-performance triboelectric materials (BPA NPs) with metal-organic–inorganic core-shell structures are synthesized to enhance the signal quality of the multimodal on-skin sensor by leveraging the self-polymerization ability and weak reducibility of dopamine. The sensitivity of the multimodal on-skin sensor is improved by designing a radially arranged micro-cone array with gradient heights. Additionally, a quantitative spasticity assessment strategy is developed by integrating muscle co-activation coefficients (Index 1) and antagonistic efficacy metrics (Index 2), which are strongly correlated with the Modified Ashworth Scale scores. The multimodal on-skin sensor with the proposed assessment strategy enables quantitative assessment of spasticity in 9 spasticity patients.
研究领域:
生物医学工程
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可穿戴传感器
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神经康复
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信号处理
·
智能材料
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）