Polymer Grafted Gold Nanoparticles And Their Applications

Aurum is one of the most stable chemical elements, the particles in nanoscale possess unique Surface Plasmon Resonance optic properties. It is well-known that the properties and applications of Au nanoparticles vary with size, morphology and modification. Studies of Au nanoparticles’ surface crystal structure improve the performance in applications. Based on synthesis, surface modification and applications of Au nanoparticles, this paper was established.1. Synthesized Au nanoparticles with different morphologies and sizes: nanospheres with 15 nm diameter, nanorods coated by three kinds of ligands with different length-diameter ratios. Then the Au nanorods overgrow into arrow-head nanorods. Subsequently Au arrow-head nanorods were modified with PS-SH in two ways to attain Au arrow-head nanorods coated by PS-SH in side area and tip area which were dispersed in 1,2-dichlorobenzene.2. Au arrow-head nanorods were doped into light active layer of polymer solar cell. And the devices were tested and analyzed for the J-V characteristics. Increased Jsc and FF were observed in the cells including Au arrow-head nanorods with optimal doping ratio. The maximum enhancement of 28.7% in PCE(from 5.74 to 7.40%) was achieved compared with the device without Au arrow-head nanorods and doping with Au nanorods.3. Using NMR detecting kinetic of PEG-SH grafting onto nanospheres. Due to the changes of chemical environment after grafting, the peak of NMR was broadening. Synthesized a series of brush polymer: HS-p(MAPEGn)m. Hope for making clear the mechanism of polymer grafting onto nanostructures by adjusting polymerization degree of branched chain.