Fabrication of isolated platinum nanowire gratings and nanoparticles on silica substrate by femtosecond laser irradiation
Fabrication of isolated platinum nanowire gratings and nanoparticles on silica substrate by femtosecond laser irradiation
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DOI：
10.1016/j.apsusc.2016.10.058
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发表时间：
2017-02
影响因子：
6.7
通讯作者：
Y. Nakajima;N. Nedyalkov;A. Takami;M. Terakawa
中科院分区：
文献类型：
--
作者：
Y. Nakajima;N. Nedyalkov;A. Takami;M. Terakawa
我们展示了利用飞秒激光在二氧化硅衬底上制备孤立的铂纳米结构。通过用800 nm波长的飞秒激光脉冲照射沉积在熔融石英衬底上的铂薄膜来形成具有约50 nm的短周期的纳米线光栅。从纳米线光栅到纳米颗粒的结构演变仅通过增加脉冲的数量来观察。结构的周期或直径表现出良好的均匀性。扫描电子显微镜的表面和理论计算的温度分布，使用两个温度模型表明，结构的演变可以归因于所形成的纳米线的碎片。所提出的方法提供了一种简单和高通量的技术，用于制造金属纳米线光栅和纳米颗粒，这有可能被用于光学，电学和生物医学器件的制造。
We demonstrate the fabrication of isolated platinum nanostructures on a silica substrate by using femtosecond laser. Nanowire gratings which have short periodicities of approximately 50 nm were formed by irradiating a platinum thin film deposited on a fused silica substrate with 800-nm wavelength femtosecond laser pulses. The structural evolution from the nanowire gratings to nanoparticles was observed only by increasing the number of pulses. The periodicities or diameters of the structures showed good uniformity. Scanning electron microscopy of the surfaces and theoretical calculation of temperature profile using a two-temperature model revealed that the structural evolution can be attributed to the fragmentation of the formed nanowires. The presented method provides a simple and high-throughput technique for fabricating both metal nanowire gratings and nanoparticles, which have the potential to be used for the fabrication of optical, electrical and biomedical devices.