“…Candle soot, for instance, has attracted much attention in recent years, mostly originating from the pioneering work of Liu et al [7], which showed for the first time the use of candle soot as a source material for the preparation of photoluminescent CNPs. Other reported applications include the use of soot as a hole extractor layer in perovskite solar cells [8], electron acceptor material in blends with poly (3-hexylthiophene) (P3HT) for organic solar cells [9], anode material in high-rate lithium-ion batteries [10], or use as a supercapacitor electrode material [11]. The technological applications of soot CNPs are thus manifold and span from their use in optoelectronic devices, such as material for the energy and environmental sectors, to the realization of active coatings for sensing [12,13], surface wettability modification [14][15][16] and water purification [17,18], or coatings with customized anti-icing and antimicrobial performances [19].…”