Design and fabrication of a 3D-structured gold film with nanopores for local electric field enhancement in the pore.
Design and fabrication of a 3D-structured gold film with nanopores for local electric field enhancement in the pore.
复制标题
设计和制造具有纳米孔的 3D 结构金膜，用于增强孔中的局部电场。
DOI：
10.1088/0957-4484/27/6/065302
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发表时间：
2016
期刊：
影响因子：
3.5
通讯作者：
Grant-Jacob JA
中科院分区：
文献类型：
--
作者：
Grant-Jacob JA
设计并制造了具有限定的周期性几何形状的纳米孔的三维结构的金膜膜，以通过操纵纳米孔内的等离子体激元来提供空间局部化的电场增强。对于水溶液和空气环境中的膜，考虑相对于金字塔具有不同尺寸和取向的方形纳米孔，这允许控制结构内的电场的位置。创建了适用于780 nm光的设计。这里，通过氢氧化钾蚀刻到（100）硅衬底的{111}平面而产生的周期性金字塔形空腔被用作用于产生周期性金字塔形结构的独立式薄金膜的模板。与来自理论研究的发现一致，在腔中的特定位置处通过金膜研磨50 nm正方形的纳米尺寸孔以提供电场控制，其随后可用于增强纳米孔中分子的荧光或拉曼散射。
Three-dimensionally structured gold membrane films with nanopores of defined, periodic geometries are designed and fabricated to provide the spatially localised enhancement of electric fields by manipulation of the plasmons inside nanopores. Square nanopores of different size and orientation relative to the pyramid are considered for films in aqueous and air environments, which allow for control of the position of electric fields within the structure. Designs suitable for use with 780 nm light were created. Here, periodic pyramidal cavities produced by potassium hydroxide etching to the {111} planes of (100) silicon substrates are used as templates for creating a periodic, pyramidal structured, free-standing thin gold film. Consistent with the findings from the theoretical studies, a nano-sized hole of 50 nm square was milled through the gold film at a specific location in the cavity to provide electric field control which can subsequently used for enhancement of fluorescence or Raman scattering of molecules in the nanopore.