Ruthenium Grubbs' catalyst nanostructures grown by UV-excimer-laser ablation for self-healing applications

► Successful preparation of 5-Ethylidene-2-Norbornene (5E2N) monomer reacted with Ruthenium Grubbs' Catalyst (RGC) composite. ► The kinetics of the 5E2N ring opening metathesis polymerization (ROMP) is effective in a large temperature range (−20 to 45 °C). ► The kinetics of the 5E2N ROMP is occurring at very short time scales (<1 min at 40 °C). ► Successful preparation of RGC nanoparticles (NPs) by UV-excimer laser ablation approach. ► The ROMP reaction associated to RGC-NPs was achieved at an unprecedented extreme low RGC, equivalent to 0.00117 Vol.%.