Preparing ripening-suppressed metallic nanoparticles using a laser-irradiated carbon nanotube sacrificial layer
Preparing ripening-suppressed metallic nanoparticles using a laser-irradiated carbon nanotube sacrificial layer
复制标题
使用激光照射的碳纳米管牺牲层制备成熟抑制的金属纳米颗粒
DOI：
10.1016/j.apsusc.2019.144705
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发表时间：
2020-03-15
影响因子：
6.7
通讯作者：
Sun, Lianfeng
中科院分区：
文献类型：
--
作者：
Wang, Lei;Chi, Xiannian;Sun, Lianfeng
金属纳米粒子负载于基底上在催化、传感器和生物检测等领域有着广泛的应用，这些领域需要小的粒径和均匀的分布。在各种制备方法中，热诱导纳米膜去湿是获得这种负载型纳米颗粒的具有成本效益的方法。然而，由于在升高的温度下不可避免的熟化，纳米颗粒的尺寸总是在去湿过程中失控地增长。在镍纳米薄膜去湿过程中，巧妙地引入了激光辐照单壁碳纳米管（SWCNTs）薄膜作为牺牲层，该牺牲层可以抑制颗粒的熟化，且易于去除。最后得到了均匀分布、尺寸较小的Ni纳米颗粒阵列，对碳纳米管刻蚀的化学反应有很好的催化作用。原则上，这种牺牲层法也适用于制备其他铁磁性金属纳米颗粒，如Fe和Co，这将大大扩展其应用范围。
Supported metallic nanoparticles on a substrate has wide applications in catalysis, sensors and biological detection, where small particle size and uniform distribution are desired. Among the various preparation methods, thermal-induced nanofilm dewetting is a cost-efficient approach to obtain such supported nanoparticles. However, the nanoparticle size always grows out of control in dewetting because of unavoidable ripening at an elevated temperature. Herein, a laser-irradiated single-wall carbon nanotubes (SWCNTs) film is skillfully introduced as a sacrificial layer in the process of Nickel (Ni) nanofilm dewetting, which can suppress particle ripening and is easy to be removed. Finally, uniform-distributed and small Ni nanoparticle array is achieved, showing a good catalytic effect in the chemical reaction of carbon nanotube etching. In principle, this sacrificial layer method also applies to preparing other ferromagnetic metallic nanoparticles such as Fe and Co, which will largely expand its application scope.