Abstract
Changing the morphology of noble metal nanoparticles and polarization dependence of nanoparticles with different morphologies is an important part of further research on surface plasma enhancement. Therefore, we used the method based on Matlab simulation to provide a simple and effective method for preparing the morphologies of Au nanoparticles with different morphologies, and prepared the structure of Au nanoparticles with good uniformity and different morphologies by oblique angle deposition (OAD) technology. The change of the surface morphology of nanoparticles from spherical to square to diamond can be effectively controlled by changing the deposition angle. The finite difference time domain (FDTD) method was used to simulate the electromagnetic fields of Au nanoparticles with different morphologies to explore the polarization dependence of nanoparticles with different shapes, which was in good agreement with Raman spectrum.
Highlights
We found that the radar diagram simulated by finite difference time domain (FDTD) and the graph of the fitting circle measured by experimental Raman fitted well with the experiment data
The differenceThe wasbasic that the of hot menttended of gold nanoparticles with different shapes and thedirection polarization spots to be more concentrated
Image showed that the was consistent with the “tip” area of the nanocap, the intensity of the hot spot was extremely morphology the nanoparticle complete axisymmetry asof the strong
Summary
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