Study of water temperature effect on the synthesis of gold nanoparticles by laser ablation technique

In this study, gold nanoparticles were made by using a Q-switched Nd: YAG laser of 1064 nm wavelength. The process involved hitting a pure gold object in double distilled water with 90 laser pulses, each lasting 10 nanoseconds and using 700 mJ of energy. The experiments were conducted at different water temperatures. The study looked at how heating water affects the optical properties, surface shape, and size of nanoparticles. The results showed that as the water temperature rises, the particle size also increases. Additionally, when the water is heated to 50 degrees Celsius, the absorption spectra show a change towards red.