Customization of Nanogap Arrays Using Stereolithography and Nanoskiving for Surface-Enhanced Raman Scattering

IF 5.3 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY ACS Applied Nano Materials Pub Date : 2024-10-17 DOI:10.1021/acsanm.4c0512510.1021/acsanm.4c05125

Zifan Xiao, Chong Chen, Ge Xiao, Yun Jiang, Xiaomi Lu, Yu Wang*, Bin Ai* and Gang Zhang*,

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Abstract

Nanoskiving has been utilized in the fabrication of plasmonic nanogaps. It is imperative to develop a cost-effective and highly adjustable method for the manipulation of predetermined models, as the fabrication of nanogaps by nanoskiving relies on predetermined models. Here, a method is proposed that leverages stereolithography to design and fabricate predetermined models, coupled with nanoskiving to fabricate various patterned nanogaps for surface-enhanced Raman scattering. Four different patterned arrays (rod-shaped nanogap arrays, striped nanogap arrays, square-arranged crescent-shaped nanogap arrays, and hexagon-arranged crescent-shaped nanogap arrays) with 5 nm nanogaps are successfully fabricated. The strong plasmon coupling is excited within nanogaps, leading to a several-fold increase in Raman intensity, higher than that of structures without a nanogap. Furthermore, it is also observed that the Raman intensity varies with the morphologies of nanogap arrays. The crescent-shaped nanogap arrays exhibit a 1.8-fold higher intensity compared to that of linear-shaped nanogap arrays. Through the theoretical analysis, this phenomenon is related to the distinct oscillating propagation of light between parallel or nonparallel noble metals. The innovative combination of stereolithography and nanoskiving paves the way for the fabrication of patterned nanogaps, holding significant potential for plasmonic sensors, nonlinear optics, and molecule detection.

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利用立体光刻和纳米剥离定制用于表面增强拉曼散射的纳米间隙阵列

纳米渗流已被用于制造等离子纳米缝隙。开发一种成本效益高、可调节性强的方法来操作预定模型势在必行，因为通过纳米渗胶制造纳米缝隙依赖于预定模型。本文提出了一种利用立体光刻技术设计和制造预定模型的方法，该方法与纳米渗胶技术相结合，可制造出用于表面增强拉曼散射的各种图案化纳米缝隙。我们成功地制造出了四种不同的图案阵列（杆状纳米间隙阵列、条状纳米间隙阵列、方形排列的新月形纳米间隙阵列和六角形排列的新月形纳米间隙阵列），其纳米间隙为 5 纳米。纳米间隙内激发了强等离子体耦合，导致拉曼强度增加了数倍，高于无纳米间隙的结构。此外，还观察到拉曼强度随纳米间隙阵列的形态而变化。新月形纳米间隙阵列的拉曼强度是线形纳米间隙阵列的 1.8 倍。通过理论分析，这一现象与光在平行或不平行贵金属之间的不同振荡传播有关。立体光刻技术和纳米打孔技术的创新结合为图案化纳米间隙的制造铺平了道路，为等离子体传感器、非线性光学和分子检测带来了巨大潜力。

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来源期刊

ACS Applied Nano Materials Multiple-

CiteScore

8.30

自引率

3.40%

发文量

1601

期刊介绍： ACS Applied Nano Materials is an interdisciplinary journal publishing original research covering all aspects of engineering, chemistry, physics and biology relevant to applications of nanomaterials. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important applications of nanomaterials.