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In this work, we study the effect of surface roughness and shape of Au nanoparticles on the local field enhancement of SERS-active substrates. Our 3D FDTD simulation predicts that the substrate with roughened surface exhibits large field enhancement, especially for cubic shape of nanoparticle. The field enhancement of spherical and cubic nanoparticles is enlarged by Au/Ag alloy and Au nanocage structure...
In this paper, the surface roughness effects with Au particles which are simulated and discussed by solving a set of 3D Maxwell's equations is studied. Both the experimental and numerical results of this study show significant identification of Rhodamine 6G (R6G) using the fabricated samples.
This work, we study surface enhanced Raman spectroscopy (SERS) active substrates for the detection of Rhodamine 6G. To examine the electromagnetic enhancement, with different shape of nanoparticle, we apply the finite-difference timedomain (FDTD) algorithm to analyze the structures by solving a set of coupled Maxwell's equations in differential form. The field enhancements are investigated in the...
In this work, we study surface enhanced Raman spectroscopy (SERS) active substrates with low background for the detection of Rhodamine 6G. In our experimental evaluations, the surface enhanced Raman scattering signals from the surface substrates with a duration of 12-hour treatment and without treatment are obtained. Through three-dimensional (3D) finite-difference time-domain (FDTD) numerical simulation,...
In this work, we fabricate a surface-enhanced Raman scattering (SERS)-active substrate with low background signals using bottom-up approach. Staphylococcus aureus has been used as Raman probe to evaluate its enhancement capability. The experimental results of this study show that Staphylococcus aureus was well resolved using gold-coated hydrothermally roughened TiO2 substrates.
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