Large-Area One-Step Assembly of Three-Dimensional Porous Metal Micro/Nanocages by Ethanol-Assisted Femtosecond Laser Irradiation for Enhanced Antireflection and Hydrophobicity
Large-Area One-Step Assembly of Three-Dimensional Porous Metal Micro/Nanocages by Ethanol-Assisted Femtosecond Laser Irradiation for Enhanced Antireflection and Hydrophobicity
复制标题
通过乙醇辅助飞秒激光辐照大面积一步组装三维多孔金属微/纳米笼以增强减反射和疏水性
DOI：
10.1021/am506291f
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发表时间：
2015
影响因子：
9.5
通讯作者：
Wu Dong
中科院分区：
文献类型：
--
作者：
Li Guoqiang;Li Jiawen;Zhang Chenchu;Hu Yanlei;Li Xiaohong;Chu Jiaru;Huang Wenhao;Wu Dong
实现2D-3D可控金属微/纳米结构的能力对于诸如等离子体、电子学、生物科学和化学的各种领域是至关重要的，这是由于诸如电磁场增强、催化、光电发射和导电性的独特性质。然而，大多数现有技术仅限于低维（1D-2D）、小面积或单一功能。本文报道了利用乙醇辅助飞秒激光在镍表面自组织组装三维多孔金属微/纳米笼阵列。通过飞秒激光照射，在5 ~ 30 ms的曝光时间内，研究了微纳米笼的形成机理，并通过不同的激光脉冲能量，实现了微纳米笼阵列尺寸在0.8 ~ 2 μm范围内的控制。该方法具有快速（约10 min）、简单（一步工艺）和易于大面积（4 cm 2或更大）制造的特点。3D笼状微/纳米结构不仅表现出从80%到7%的改进的疏水性，而且在没有表面改性的情况下，还表现出从98.5°到142°的增强的疏水性。这种简单的三维大面积可控金属微结构技术在光电子学、物理学和化学等领域有着巨大的应用潜力。
The capability to realize 2D–3D controllable metallic micro/nanostructures is of key importance for various fields such as plasmonics, electronics, bioscience, and chemistry due to unique properties such as electromagnetic field enhancement, catalysis, photoemission, and conductivity. However, most of the present techniques are limited to low-dimension (1D–2D), small area, or single function. Here we report the assembly of self-organized three-dimensional (3D) porous metal micro/nanocages arrays on nickel surface by ethanol-assisted femtosecond laser irradiation. The underlying formation mechanism was investigated by a series of femtosecond laser irradiation under exposure time from 5 to 30 ms. We also demonstrate the ability to control the size of micro/nanocage arrays from 0.8 to 2 μm by different laser pulse energy. This method features rapidness (∼10 min), simplicity (one-step process), and ease of large-area (4 cm2or more) fabrication. The 3D cagelike micro/nanostructures exhibit not only improved antireflection from 80% to 7% but also enhanced hydrophobicity from 98.5° to 142° without surface modification. This simple technique for 3D large-area controllable metal microstructures will find great potential applications in optoelectronics, physics, and chemistry.