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Because of the small size, large surface area and other characteristics, nanoparticles have special optical, magnetic, electrical and catalytic properties, so by growing close attention. Currently, people use various methods with different size and morphology of the nanoparticles and surface graft modification with the functional groups containing molecules on their surface modified, to achieve assembly of nanoparticles condition. In a further study, people with these functionalized nanoparticles as a basic structural unit, by van der Waals, electrostatic, hydrogen bonding and other intermolecular forces supramolecular, they are assembled into an assembly having different morphologies, and thus nano-device design, build and application of foundation. However, poor stability, easy to assemble, easy long-term storage and other drawback is the assembly of nanoparticles and their common problems. To solve these problems, the polymer system into nanoparticles. On the one hand, the introduction of the polymer nanoparticles and assembly improves the stability of the structure; other hand, the presence of nanoparticles in the polymer strength, toughness and other properties improved, enabling the polymer nanoparticles function integration. In this paper we first gold nanoparticles as the basic structural units, achieved by varying the experimental conditions on silicon nanoparticles controllable self-assembly, which is to further understanding of the charged particles in the self-assembly behavior He Nami has very important significance. We then prepared by seed flower-shaped structure with gold nanoparticles, and has been in the liquid - liquid interface of the two-dimensional assembly structure, this structure is assembled SERS has potential applications. Next, we introduced into the polymer nanoparticle assembly system, successfully prepared polypyrrole (PPy) coated gold shell cluster compound, this compound has good stability and sodium borohydride reduction reaction of methylene blue has good catalytic activity and reusability. Finally, we use the in-situ polymerization prepared Fe 3 O 4 / SiO 2 / PPy composites, in which the thickness of PPy shell can be changed by the system to control the amount of pyrrole monomer. PPy has good stability and biocompatibility, so we prepared Fe 3 O 4 / SiO 2 / PPy composites in Biomedical has potential applications.
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