Carbon nanoparticles (CNP), such as carbon black and carbon fibers, are worldwide used as reinforcement for composite polymeric materials. The functionalization of CNP surface can proficiently extends their potential applications in sectors such as catalysis, energy storage, electro-bio-chemical sensing, and pollutant recovery. Functionalization typically requires chemical post-treatments, often with high costs and environmental impact. Alternatively, it can be achieved through more sustainable and innovative processes, such as the one proposed in the project STANDALONE (PRIN 2022), based on the production and functionalization of CNPs in a single