Abstract: The CdSe-quantum dots were grown in situ on the multiwalled carbon nanotubes (MWCNTs) using thioglycollic acid as the stabilizer in mild reaction conditions (in aqueous solution and at 90 ℃).The as prepared CdSe-MWCNTs quantum dots heterojunctions (CdSe-MWCNTs) were characterized by TEM, HRTEM, EDS, XRD and XPS measurements. The EDS and XPS analysis shows that the quantum dots are mainly composed of Se and Cd elements and their binding energies correspond to that of semiconductor CdSe. The XRD measurement suggests that the CdSe quantum dots have the cubic phase. The HRTEM results reveal that the diameter of CdSe quantum dots is about 4 nm. It is also found that the thioglycollic acid can prohibit the conglomeration of the individual nanocrystals. The distinct optical properties were visualized by the photoluminescent measurements.

Key words: MWCNTs, 　CdSe, 　Quantum dots