The Influence of Ablation Speed on the Synthesis of Carbon Nanostructures Via Pulsed Laser Ablation of Asphalt in Ethanol

Pulsed liquid laser ablation is considered a green method for the synthesis of nanostructures because there are no byproducts formed after ablation. In this paper, fiber wavelength 1.064 µm, peak power 1 mJ, pulse duration 120 ns, and repetition rate 20 kHz, was used to produce carbon including nanospheres nanorods from asphalt in ethanol at speeds (100, 75, 50, 10 mm/s). The morphology, composition optical properties synthesized samples were studied experimentally using FESEM, HRTEM, EDS, UV-vis spectrophotometer. Results showed that band gap energy decreased with decreasing speed (increasing time), minimum mean particle size 76 nm an 100mm/s, while maximum 98 50 mm/s, agglomerated form larger spherical nanoshapes. All nano colloids exhibited blue-green PL emission. It concluded presence has effect on nanospheres.