Ma W Y, Yao J, Yang H, Liu J Y, Li F, Hilton J P, Lin Q
State Key Lab of Optical Technologies for Microfabrication, Institute of Optics and Electronics, Chinese Academy of Science, Chengdu, 610209, People's Republic of China.
Opt Express. 2009 Aug 17;17(17):14967-76. doi: 10.1364/oe.17.014967.
Polyhedral nanostructures are widely used to enable localized surface plasmon resonance (LSPR). In practice, vertices of such structures are almost always truncated due to limitations of nanofabrication processes. This paper studies the effects of vertex truncation of polyhedral nanostructures on the characteristics of LSPR sensing. The optical properties and sensing performance of triangular nanoplates with truncated vertices are investigated using electrodynamics analysis and verified by experiment. The experimental results correlated with simulation analysis demonstrate that the fabricated triangular nanoplate array has a truncation ratio, defined as the length of truncation along an edge of the triangle over the edge length, of approximately 12.8%. This significantly influences optical properties of the nanostructures, resulting in poorer sensing performance. These insights can be used to guide the design and fabrication of nanostructures for high performance LSPR sensors.
多面体纳米结构被广泛用于实现局域表面等离子体共振（LSPR）。在实际应用中，由于纳米制造工艺的限制，此类结构的顶点几乎总是被截断。本文研究了多面体纳米结构的顶点截断对LSPR传感特性的影响。利用电动力学分析研究了顶点截断的三角形纳米板的光学性质和传感性能，并通过实验进行了验证。与模拟分析相关的实验结果表明，所制备的三角形纳米板阵列的截断率（定义为沿三角形一条边的截断长度与边长之比）约为12.8%。这显著影响了纳米结构的光学性质，导致传感性能较差。这些见解可用于指导高性能LSPR传感器的纳米结构设计和制造。
