Synthesis Of Gold Nanoparticle And Study On Its Optical Properties

With the development of the nano science, noble metal nanoparticles are getting more and more attention. They always have so great physical properties that can be applied in many areas. With its unique size, morphology, structure and physical properties, gold nanoparticle is one of the hottest topics in the scientific research. It would be promising used in dealing with light information and dynamic light scattering. It is known for Surface Plasmon Resonance and high extinction high scattering. So my coming work focused on these two properties.1. Synthesize gold nanoparticles with different morphology, analysis all the factors which may affect the results. To synthesize spherical gold nanoparticles, We should choose the right approach to synthesize the right aiming target. Citrite Tri-sodium deoxidizing approach's main targets best fit gold nanopartples between 10 to 60 nm in diameter. According to the TEM pics & UV-vis data , an experiential equation was summarized:λ=527+0.245D with this experiential equation, we can predict the mean diameter of the gold nanoparticles by UV-vis spectra without TEM. As for gold nanorod, in the process of post-treatment, over-heat may cause the morphology changing. So it is important to avoid such hidden trouble.2. The synthesized gold was made some surface modification nanorod with silicon. We obtain AuRod@SiO2 with equal thickness about 10nm. Some quantum dots was chosen according to its light scattering spectra, unfortunately no luminescence enhancement was detected. With the reaction between CS2 and NH2CH2CH2NH2, gold nanorod assembles into end-to-end shape at low yield.3. Utilizing high extinction high scattering of the gold nanopartilce, fluorescence correlation spectroscopy was rebuilt to light scattering correlation spectroscopy, realizing the detecting of the interaction between gold nanoparticle and aptamer.