Mechanism for femtosecond laser pulse patterning of self-assembled monolayers on gold-coated substrates
Mechanism for femtosecond laser pulse patterning of self-assembled monolayers on gold-coated substrates
复制标题
镀金基底上自组装单分子层的飞秒激光脉冲图案化机制
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
R. Fedosejevs
中科院分区：
文献类型：
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作者：
S. Kirkwood;M. R. Shadnam;A. Amirfazli;R. Fedosejevs
利用800 nm、118ps的激光脉冲在金薄膜上进行了自组装单分子膜(SAM)图案化。SAM的去除是烧蚀的，并且在接近金薄膜的多次烧蚀阈值的通量下观察到。观察到比2e折叠强度光束直径小6倍的线宽，证明了飞秒激光的亚衍射限制图案化。在空气和氮气中类似的实验结果表明，脱除过程不涉及文献中声称的金-硫键的氧化。
Self-assembled monolayer (SAM) patterning on gold thin films was performed using 800 nm, 118 fs laser pulses. SAM removal was ablative and was observed at fluences near the multishot ablation threshold for the thin gold film. Line widths six times smaller than the 2 e-folding intensity beam diameter were observed demonstrating sub-diffraction limited patterning with femtosecond lasers. Similar experimental results in air and N2 indicated that the removal process does not involve oxidation of the gold-sulfur bond as was claimed in the literature.