Taming Light with Carbon Dots

The breakthrough of high-power lasers urged the effective light quenching materials for safeguarding eyes,sensors and photo detectors. Encountered exploration of novel carbon dots to manipulate the ray of light at a modest price. Nonetheless, a carbon dot suffers from a large spectral range detection of a ray of light, so the research has been devoted to exploring the materials to cover different spectral ranges. This article reports a novel dual-photon emissive carbon dot with large spectral emission coverage with an effortless preparation strategy. The rapid fabrication procedure constituted with dualcolour emissive carbon dots(MCCD) in a single solvent with utilization of biomass source. We have identified the mono-solvent effect induced dual emissive carbon dots observed in fluorescence spectroscopy. The fluorescence carbon particle displays the nature of excitation-independent behaviour, with an average granule size of 16.93 nm, result obtained via Transmission electron microscopy. The carbon structure suffered from the lower carbonization temperature with rapid microwave treatment, causing a turbostratic carbon structure. The dual colour contains with NIR region bright red emission solution tested against Z-scan non-linear properties, it exposes the excited state absorption involved in two-photon absorption. It offers an approach for optical limiting behaviour, with threshold reaches up to 0.53 × 10^- 10 and 4.54 × 10¹² W/m² was observed for MCCD. These result in a gateway for eco-friendly carbon dots into an optical limiting appeal.