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Controlled assembly of high-order nanoarray metal structures on bulk copper surface by femtosecond laser pulses
Qin, W. W. and J. J. Yang
2017
发表期刊Surface Science
卷号661
摘要We report a new one-step maildess method to fabricate high-order nanoarray metal structures comprising periodic grooves and particle chains on a single-crystal Cu surface using femtosecond laser pulses at the central wavelength of 400 mu. Remarkably, when a circularly polarized infrared femtosecond laser pulse (spectrally centered at 800 nin) pre-irradiates the sample surface, the geometric dimensions of the composite structure can be well controlled. With increasing the energy fluence of the infrared laser pulse, both the groove width and particle diameter are observed to reduce, while the measured spacing-to-diameter ratio of the nanoparticles tends to present an increasing tendency. A physical scenario is proposed to elucidate the underlying mechanisms: as the infrared femtosecond laser pulse pre-irradiates the target, the copper surface is triggered to display anomalous transient physical properties, on which the subsequently incident Gaussian blue laser pulse is spatially modulated into fringe-like energy depositions via the excitation of ultrafast surface plasmon. During the following relaxation processes, the periodically heated thin-layer regions can be transferred into the metastable liquid rivulets and then they break up into nanodroplet arrays owing to the modified Rayleigh-like instability. This investigation indicates a simple integrated approach for active designing and large-scale assembly of complexed functional nanostructures on bulk materials.
收录类别sci ; ei
语种英语
文献类型期刊论文
条目标识符http://ir.ciomp.ac.cn/handle/181722/59162
专题中科院长春光机所知识产出
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Qin, W. W. and J. J. Yang. Controlled assembly of high-order nanoarray metal structures on bulk copper surface by femtosecond laser pulses[J]. Surface Science,2017,661.
APA Qin, W. W. and J. J. Yang.(2017).Controlled assembly of high-order nanoarray metal structures on bulk copper surface by femtosecond laser pulses.Surface Science,661.
MLA Qin, W. W. and J. J. Yang."Controlled assembly of high-order nanoarray metal structures on bulk copper surface by femtosecond laser pulses".Surface Science 661(2017).
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