A series of CdS/PAMAM dendrimer nanocomposites of different diameters were prepared by leading NaS into the methanol solution of Cd2+/PAMAM complexes with different Cd2+/PAMAM ratio.

• 随着Cd2+/PAMAM变大，CdS量子点的吸收光谱逐渐红移，并且吸收强度也随比值增大而变大，粒径变大，同时发射光谱红移，发光颜色从紫色变为蓝色，得到一系列不同发光颜色的CdS量子点，实现了发光的可调谐性。