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The peculiar absorption of light by gold metal Nanoparticle s (NPs) is characterized by an intense peak in the Visible region, which makes them promising for the development of completely optical devices. The Surface Plasmon Resonance (SPR) position depends on the size and shape of the Nanoparticles, their interaction or the refractive index of the surrounding medium. The great interest in the Noble Metal Nanoparticles is precisely due to the fact that its absorption band is in the visible range, instead of the Ultraviolet region as in the majority of Transition Metal s. The presence of this band make gold Nanoparticle systems very promising as building blocks for devices for data storage, ultrafast switching, gas sensors, etc. |
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