| Summary: | 碩士 === 國立中正大學 === 光機電整合工程研究所 === 106 === In this paper, micron-sized MoS2 powder was prepared into MoS2 quantum dots dispersion by ultrasonic vibration method, and then gold nanoparticles were added as optical measurement aid to know its optical properties. The dispersion solvent selected in this paper is NMP, which is considered to have a surface energy close to that of MoS2, so that the prepared dispersion has good stability. Next, we measured the TEM of the MoS2 dispersion to observe the size and morphology of the MoS2 quantum dots. However, the size of quantum dots were about 3.349 nm and evenly distributed then the presence of the elements was verified by EDX detection. When the size of MoS2 nanoparticles is < 100 nm, it has photoluminescence properties. Therefore, we used the He-Cd laser at 325 nm to excite and generate the corresponding light source. In the Raman measurement section, the signal is enhanced by adding Au nanoparticles so that the synthesized quantum dots can be observed to have characteristic peaks. This verifies its material properties. In addition, the phenomenon that the absorption peak shifts to a short wavelength is also observed. After successfully synthesizing quantum dots, combining them with proteins and measuring the fluorescence intensity produced by binding to proteins at different concentrations, we can infer the best concentration of fluorescence and apply it to the biological field of protein fluorescent labeling.
Keywords: MoS2, Quantum dots, Au nanoparticles, Protein, Fluorescent
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