Gesa Beck's research group made an important advancement in the creation of nanoparticles using pulsed laser ablation in liquid (PLAL), an eco-friendly and affordable method. The study focused on how different laser pulse lengths—pico- and nanoseconds—impact the shape, size, and magnetic behavior of iron-gold nanoparticles. The results showed that the pico-second laser produced particles with a wider size range, while the nano-second laser created a unique mix of small and larger particles. This research brings valuable insights into how nanoparticles form and opens up new possibilities for creating advanced materials with customized properties.