Carbon Dots: Excitation‐Dependent Photoluminescence from Single‐Carbon Dots (Small 48/2017)

In article 1702098, by Bart van Dam, Minjie Li, and co-workers, single-dot spectroscopy is used to show that individual carbon dots already exhibit excitation-dependent photoluminescence, very similar to the ensemble of carbon dots. Characteristic excitation-dependent emission spectra are identified, indicating the presence of multiple active emission sites within a carbon dot. This shows that it is possible to engineer different types of electron transitions in nanoscopic dimensions through facile chemical synthesis.