Enhanced Ti I spectral intensity using NELIBS technique

Abstract

Enhanced emission from nano coated titanium target over than that from normal solid one was measured. The plasma was induced from both targets by the interaction of Nd: YAG laser source at a wavelength of 1064 nm. The enhanced signal emission was monitored using the Ti I- spectral lines at 453.32 and 498.17 nm. Another experiment was conducted after addition of a thin layer of 20 nm gold nanoparticles to the surface of bulk titanium. Enhancement factors were found up to twenty folds. The plasma-enhanced emission was attributed to the strong reduction in the plasma ignition threshold by a factor of 40 after adding the layer ofgold nanoparticles. Modeling to explain the origin of the strong reduction to the ignition threshold and enhanced emission is in advance which recommended that there a strong reduction of the thermal diffusion length of the bulk material to the limits of nanomaterial diameter size.