Triple-walled gold surfaces with small-gaps for nonresonance surface enhanced Raman scattering of rhodamine 6G molecules
Triple-walled gold surfaces with small-gaps for nonresonance surface enhanced Raman scattering of rhodamine 6G molecules
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DOI：
10.1116/1.4938483
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发表时间：
2016-01-01
影响因子：
1.4
通讯作者：
Takigawa, Ryo
中科院分区：
文献类型：
--
作者：
Baba, Tatsuya;Lee, Yaerim;Takigawa, Ryo
为了利用表面增强拉曼散射（Sers）效应提高拉曼散射强度，提出了在硅（Si）衬底上制备三壁金（Au）结构。通过两种不同的技术实现了具有纳米间隙的高纵横比Au球。一种是逐层技术。另一种是高长径比Au壁制备技术。最后，获得50 nm厚的Au直立壁和50 nm的间隙。通过比较裸Si衬底、Au膜、单壁Au结构和三壁Au结构在0.020 wt. %的罗丹明6G分子，三壁Au结构的Sers强度比Au膜的SERS强度高50倍。我们提出的Sers芯片的增强因子（EF）估计为4.7 × 10（6）。所提出的方法将允许我们实现多壁Au结构，这可以有效地增加EF。(C)2015年美国真空学会。
To increase the intensity of Raman scattering with surface enhanced Raman scattering (SERS) effect, the authors proposed the triple-walled gold (Au) structures on silicon (Si) substrate. High aspect ratio Au nanowalls with nanogaps were realized by two different techniques. One is layer by layer technique. The other is standing high aspect ratio Au wall fabrication technique. Finally, 50 nm-thick Au standing walls and 50 nm gaps were obtained. Through the comparison of bare Si substrate, Au film, single-walled Au structures, and triple-walled Au structures in SERS intensity with 0.020 wt. % rhodamine 6G molecules, it was revealed that the SERS intensity from triple-walled Au structure was 50 times higher than that from Au film. The enhancement factor (EF) of our proposed SERS chip was estimated as 4.7 x 10(6). The proposed method will allow us to realize multiwalled Au structure, which can increase EF efficiently. (C) 2015 American Vacuum Society.