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首页> 外文会议>Plasmonics in biology and medicine XIII >Fabrication of Tunable Plasmonic 3D Nanostructures for SERS Applications
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Fabrication of Tunable Plasmonic 3D Nanostructures for SERS Applications

机译：用于SERS应用的可调谐等离子3D纳米结构的制造

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Surface-enhanced Raman scattering (SERS) is a powerful technique used for characterization of biological and non-biological molecules and structures. Since plasmonic properties of the nanomaterials is one of the most important factor influencing SERS activity, tunable plasmonic properties (wavelength of the surface plasmons and magnitude of the electromagnetic field generated on the surface) of SERS substrates are crucial in SERS studies. SERS enhancement can be maximized by controlling of plasmonic properties of the nanomaterials. In this study, a novel approach to fabricate tunable plasmonic 3D nanostructures based on combination of soft lithography and nanosphere lithography is studied. Spherical latex particles having different diameters are uniformly deposited on glass slides with convective assembly method. The experimental parameters for the convective assembly are optimized by changing of latex spheres concentration, stage velocity and latex particles volume placed between to two glass slides that staying with a certain angle to each other. Afterwards, polydimethylsiloxane (PDMS) elastomer is poured on the deposited latex particles and cured to obtain nanovoids on the PDMS surfaces. The diameter and depth of the nanovoids on the PDMS surface are controlled by the size of the latex particles. Finally, fabricated nanovoid template on the PDMS surfaces are filled with the silver coating to obtain plasmonic 3D nanostructures. Characterization of the fabricated surfaces is performed by scanning electron microscopy (SEM) and atomic force microscopy (AFM). SERS performance of fabricated 3D plasmonic nanostructures will be evaluated using Raman reporter molecules.
机译：表面增强拉曼散射（SERS）是用于表征生物学和非生物学分子和结构的强大技术。由于纳米材料的等离子体性质是影响SERS活性的最重要因素之一，因此SERS基板的可调等离子体性质（表面等离子体的波长和表面产生的电磁场的大小）在SERS研究中至关重要。通过控制纳米材料的等离子体性能，可以使SERS增强最大化。在这项研究中，研究了一种基于软刻蚀和纳米球刻蚀相结合的可调谐等离子体3D纳米结构的新颖方法。用对流组装法将具有不同直径的球形胶乳颗粒均匀地沉积在载玻片上。通过改变乳胶球的浓度，载物台速度和放置在两个以一定角度相互保持的玻璃载玻片之间的乳胶颗粒体积，可以优化对流组件的实验参数。然后，将聚二甲基硅氧烷（PDMS）弹性体倒在沉积的胶乳颗粒上并固化，从而在PDMS表面获得纳米空隙。 PDMS表面上的纳米空隙的直径和深度由乳胶颗粒的大小控制。最后，在PDMS表面上制成的纳米空隙模板中填充了银涂层，以获得等离激元3D纳米结构。通过扫描电子显微镜（SEM）和原子力显微镜（AFM）对制成的表面进行表征。将使用拉曼报告分子评估制造的3D等离子体纳米结构的SERS性能。

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