A comparative study of size distribution of nanoparticles generated by laser ablation of graphite and tungsten

Nanoparticles (NPs) were generated by ArF excimer laser ablation of graphite and tungsten targets in N2 ambient at atmospheric pressure. The size distribution of the particles was monitored in situ by a scanning mobility particle sizer (SMPS) system, based on differential mobility analyser. The experimental conditions made possible to record the size distributions in the 7–133-nm diameter range and results are presented for different laser fluences, repetition rates and ablated areas, respectively. al analysis was performed by photoelectron spectroscopy (XPS), Raman spectroscopy, X ray diffraction and SEM.