Synthesis of germanium quantum dots by laser ablation technique in the presence of water and benzene

This work used a Nd-Yag laser with a wavelength of 1460 nm, energy of 0.5 mJ, and different numbers of pulses (50, 100, 150, 300) to create nanoparticles (quantum dots). A water-based solvent was used to dissolve the germanium. The optical and structural properties of the nanoparticles were also examined in benzene solvent using a range of techniques (including Raman, UV, XRD, TEM, and AFM). The results of the investigation demonstrated that the energy gap of gasoline has a maximum value of 3.71 eV at 50 pulses, showing that it declines as the pulse count increases, while the energy gap of water is 4.25 eV at 100 pulses. Stated differently, the energy gap in water increases with the number of pulses. The structure of the cubic (FCC) nanocrystal is shown. The average crystal sizes in water (8.629) and benzene (6.543) were found after analysis.