The Optical And Magnetic Study Of Nanostructural Materials Based On [60] Fullerene

There has been an increasing interest in design and preparation of nanostructure materials by self-organization into one-, two-, and three-dimensional supramolecular architecture because of their potential application in the promising optical device, electronic sensor, nanoscale electronics, magnetic materials, and catalysis due to the high surface-to-volume ratios and small size effect. The self-assembly of fullerenes and fullerene derivatives onto a variety of surfaces of interest substrates such as metals, semiconductors, insulators and cuprate-based high temperature superconductors has been actively investigated. In this thesis, the [60] fullerene derivatives containing the oligopyridyl moiety are self-assembled onto the surface of noble metals and oxides of transition-metals, form nanostructure materials. We studied their optical and magnclic properties. The main conclusions in this thesis have been summarized as follows.Through the azide reaction and cycloaddition reaction we have conveniently synthesized two novel fullerene derivatives (C60 BPY and C60TPY) in which the spacers are short between the [60] fullerene moiety and the oligopyridines, study their properties by spectrum of TOF, 1H NMR, 13C NMR and FT-IR.The C60TPY is employed to self-assemble on the surface of Au(111). The scanning tunneling microscopy (SEM) results show that the [60] fullerene derivative can form a self-assembled monolayer on the Au(111) surface spontaneously. The images of SEM indicate that the pyriclyl nitrogen of C60TPY is strong interaction with Au(111).The C60TPY is used to self-assemble on the surface of noble metals' nanoparticlcs by reducing their material complexes using sodium borohydride in the presence ofC60TPY.. Transmission electron micrographs (TEM) indicate gold, silver, ruthenium, platinum and palladium are formed nanoparticles and lead is formed nanowires, and through the images of TEM we study their morphology. At the same time we prepare gold nanoparticles in different conditions, find the radiuses of preparing gold nanoparticles in different conditions are not same. The velocity of whisk is faster, the radius of nanoparticles is smaller. By ultrasonic vibrating we also prepare small nanoparticles. The diameters of nanoparticles are in the range of 5-30 nm. The length of lead nanowires are in the range of 0.1-0.7 um, the diameters are in the range of 30-50 nm. The optical limiting properties of their nanomaterials are studied using Q-switched, frequency-doubled Nd: YAG laser with 10 ns pulse at 532 nm. We find they are all good light limiting materials.The C60TPY is used to self-assemble on the surface of oxides of transition-material (iron, cobalt, nickel). Transmission electron micrographs (TEM) indicate they are formed nanoparticles, we study their figures and sizes and find the diameter of nanoparticles are bigger, in the range of 100-200 nm. NiO has two figures. When base is in existence, it is a nanoparticle, when base is excessive, it is a nanonet, the diameter of holes are about 8 nm. We study their magnetic properties and find they have higher magnetism.