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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.
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, the emission efficiency of the novel surface conduction electron-emitter corresponding to tilted angles (thetas) of the driving electrode is studied numerically. Due to the small angle, the emitter apex becomes significant and induces large electric field. The large electric field then attracts more particles into vacuum and then increases the emission current. However, the structure...
Nanogap nowadays is fascinating in surface conduction electron-emitters (SCEs) for electron sources of the flat panel displays (FPDs). Surface conduction electron-emitter display (SED) is one of new type FPDs based on the SCEs. The nanogap fabricated by focused ion beam was studied, but the extremely narrow fissure complicated its fabrication. Palladium hydrogenation nanogaps have thus been proposed...
In this work, we explore the effect of process variation on field emission characteristics in surface conduction electron-emitters. The structure of palladium thin-film emitter is fabricated on the substrate and the nanometer scaled gap is formed by the focused ion beam (FIB) technique. Different shapes of nanogaps due to the process variations are investigated by the experiment and 3D Maxwell particle-in-cell...
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