Fine tuning the optical properties of single Au nanoparticles by plasmon-driven growth in closed-loop control

MARTINEZ, LUCIANA PAULA; GARGIULO, JULIAN; BARELLA, MARIANO; IANINA L. VIOLI; FERNANDO STEFANI

Conferencia; META®, the International Conference on Metamaterials, Photonic Crystals and Plasmonics 2022; 2022

We present the control of plasmon-driven growth of Au nanoparticles by live monitoring their photoluminescence emission in a closed-loop. We find that the final emission maximum of single nanoparticles can be tuned with a precision of 2-3 nm, and that the tuning is also reflected in their scattering maximum. In comparison to controlling the growth by irradiation time and/or reaction conditions, the closed-loop control delivers superior reproducibility and a 3-to-4-fold higher precision in the final properties of the nanoparticles.