| Carbon nanotubes have demonstrated a wealth of exceptional structure, mechanical and electronic properties, which have made them potentially useful for application in nano-composites. The nanogold particle has extensive application in the fields of nanometer electronics, gold catalysis etc. It also can be used in the biological mark and measure, but when the solution is lower in density in the biomedical, the question such as being faint of the testing signal exists. Compound carbon nanotube with the nanogold particles.It can unite the C6H16SSi and a large number of nanogold particles through the key, and then absorb the organic macromolecule through the sulphur gold key, make the originally scattered organic macromolecule collect richly, originally faint information will be strengthened.Water soluble multiwall carbon nanotube (MWNT) was prepared via chemical oxidation. Studies have shown, the carbon nanotubes is obviously thinning, have higher purity , It is in charge of some carboxyl and hydroxyl exist in the carbon nanotube, the quantity of functional group on the surface of carbon nanotube relate of oxidize time, the control of oxidizes time is the key to testing successfully in follow-up. Water soluble multiwall carbon nanotube has good dispersiveness and stability.Adopt the One-step prepare nanogold sol, having selected Na3-citrate aqueous solution reduced HAuCl4·3H2O and prepared nanogold sol. We have studied a relevant factor of influencing the gold nanometer particle. The experiment shows , the size of the nanogold particles is closely related with the quantity of reducing agent, through controlling the joining amount and the time, the minimum diameter we obtain the gold nanometer particle are 12nm, Because nanometer particles are limited, nanogold particle's diameter are larger.The pretreatment of carbon nanotubes make its surface form the sulfhydryl-base, It realized the gold nanometer particle on carbon nanotube surface equipment by self-assembling, have prepared carbon nanotubes/nanogold composite. Studies have shown, the structure of samples is steady, the nanogold particles on the carbon nanotubes takes the form of ball and distributed evenly , the average diameters are about 2nm. Because there are more surface area on the carbon nanotubes than the others, thus form more nanometer particle on the carbon nanotube surface, it make the original density of nanogold solution lower, restraining the gold nanometer particle from growing, making nanometer particle are smaller. |
