Study On The Fabrication And Optical Properties Of Mn-Doped Cdte Quantum Dots

In recent years, nanometer material has become the forefront of science, attract a broader scientific community scholars. While the novel nanomaterials in biological and biomedical applications is becoming one of hot research direction. Water soluble quantum dots (quantumdots, QDs) because of its excellent optical properties, such as broadband and narrow-band fluorescence absorption, size effect, high quantum efficiency, light stability and good, once attracts the NM science scholars’ attention at home and abroad, and it is expected to replace the traditional dye into a new generation of fluorescent material.This paper is through the aqueous phase synthesis method, using MPA (3-mercaptopropionic acid) as stabilizer, which is prepared by MnCl2and MnS04two kinds of drugs involved in the occurrence of new quantum. The advantage of it is the quantum dots with stable chemical properties, optical properties, high quantum yield significantly, long fluorescent life. Doped Mn ions of quantum dots in the near infrared band, which lies a good foundation for future biological detection technology. In this paper, the specific research contents are as follows:First, using MPA as a stabilizer, MnCl2as drugs makes the uniform distribution and the smaller CdTe:Mn quantum dots by using aqueous synthesis method. The paper analyses the time of reaction, concentration, pH value of experimental parameters on the quantum dot optical properties. The results show that with increasing reaction time, quantum dot size is increasing, and the absorption and emission spectra have an obvious phenomenon of red shift.Second, using MPA as a stabilizer, MnCl2as drugs makes the uniform distribution and the smaller CdTe:Mn quantum dots by using aqueous synthesis method. The paper analyses the time of reaction, concentration, pH value of experimental parameters on the quantum dot optical properties. The results show that the increase of the reaction time makes the absorption and emission spectra of red shift phenomenon, and the increase of quantum dot.The conclusion by two groups of data comparative analysis:using MnSO4as drug reactions to participation in quantum dots and photochemical properties is more stable, more beneficial to the future in vivo studies.