Self-Aligned Plasmonic Nanopores by Optically Controlled Dielectric Breakdown.
Self-Aligned Plasmonic Nanopores by Optically Controlled Dielectric Breakdown.
复制标题
DOI：
10.1021/acs.nanolett.5b03239
复制
发表时间：
2015-10-14
期刊：
影响因子：
10.8
通讯作者：
Dekker C
中科院分区：
文献类型：
--
作者：
Pud S;Verschueren D;Vukovic N;Plesa C;Jonsson MP;Dekker C
我们提出了一种新的具有成本效益的方法，用于制造高品质的自对准等离子体纳米孔的光学控制介电击穿。电介质膜上的等离子体蝴蝶结纳米天线的激发将膜的高压驱动击穿定位到增强光场的热点，从而产生自动自对准蝴蝶结的等离子体热点的纳米孔。我们表明，该方法提供了精确的控制纳米孔的大小，这些等离子体纳米孔可以用作单分子DNA传感器与TEM钻纳米孔的性能相匹配。光学受控击穿的原理也可以用于在受控位置处制造非等离子体纳米孔。我们的新型制造工艺保证了纳米孔与纳米天线的光学热点的对准，从而确保孔移位生物分子与可用于检测和操作分析物的集中光场相互作用。
We present a novel cost-efficient method for the fabrication of high-quality self-aligned plasmonic nanopores by means of optically controlled dielectric breakdown. Excitation of a plasmonic bowtie nanoantenna on a dielectric membrane localizes the high-voltage-driven breakdown of the membrane to the hotspot of the enhanced optical field, creating a nanopore that is automatically self-aligned to the plasmonic hotspot of the bowtie. We show that the approach provides precise control over the nanopore size and that these plasmonic nanopores can be used as single molecule DNA sensors with a performance matching that of TEM-drilled nanopores. The principle of optically controlled breakdown can also be used to fabricate non-plasmonic nanopores at a controlled position. Our novel fabrication process guarantees alignment of the nanopore with the optical hotspot of the nanoantenna, thus ensuring that pore-translocating biomolecules interact with the concentrated optical field that can be used for detection and manipulation of analytes.