Fabrication of long-lived afterglow composites of sulfur nanodots through a melt-injection reaction

Sulfur nanodot composites were synthesized by injecting a mixture of sulfur nanodots and paraformaldehyde into molten urea, leading to the uniform incorporation of sulfur nanodots into a urea-formaldehyde matrix. The matrix boosted the afterglow performance of the sulfur nanodots by forming cross-linked networks.