Complex sentence: One of the most important properties of core-shell semiconducting nanocrystals (CSSNCs) is that their cores, which are quantum dots, fluoresce, which is important in their biomedical and optical applications.
Split into simpler sentences: One of the most important properties of core-shell semiconducting nanocrystals (CSSNCs) is that their cores, which are quantum dots, fluoresce. This property is important in their biomedical and optical applications.