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Study of plasmonic properties of gold nanoparticles of different shapes with emphasis on gold nanopyramids

机译：不同形状的金纳米粒子血浆性质研究，重点对金纳米甲酰胺的重点

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We present a study of gold nanopyramids and their optical properties. A comparison with the extinction properties of gold nanorods and nanocubes is also undertaken. The Finite Difference Time Domain (FDTD) method is used for the study of optical properties. The nanopyramids display a dual plasmon resonance when excited with a perpendicularly polarized signal due to the excitation of dipole and quadrupole modes. The quadrupole modes are not strongly affected by changing the height of the nanopyramids whereas the dipole mode is redshifted with increasing the height of the nanopyramids. The quadrupole mode could be of interest in some applications where the shorter wavelength resonance is desired. The quadrupole and dipole modes are located at 620 nm and 765 nm respectively. This band is used for both intensity and wavelength modulated biosensors. Furthermore, the electric field is enhanced in the case of the nanopyramids which is considered as another advantage in sensing and surface enhanced Raman scattering (SERS) applications.
机译：我们介绍了金纳米碱基及其光学性质的研究。还进行了与金纳米棒和纳米孔的消光特性的比较。有限差分时域（FDTD）方法用于研究光学性质。当由于偶极和四极其激发而垂直极化信号激发时，纳米瓶子显示双等离子体共振。通过改变纳米瓶子的高度而不会强烈影响四极杆模式，而偶极模式是随着纳米卟啉的高度而被重新喷射。在需要较短波长谐振的一些应用中，四极其模式可能感兴趣。四极和偶极模式分别位于620nm和765nm。该频带用于强度和波长调制的生物传感器。此外，在纳米瓦胺的情况下，电场被认为是在感测和表面增强的拉曼散射（SERS）应用中的另一个优点。

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