Study On The Hard Template Synthesis Of Metal Micron Lines And Tubes

Micro/nano device has been applied widely, because of its reduced size, increased performance and decreased manufacturing cost. In recent years, the metal micro/nano wires and micro/nano tubes array are concerned due to their special physical and chemical properties, and have been widely used in optical, electrical, magnetic, and other fields. Many methods have been applied to prepare the micro/nano materials. Hard template method is a simple and feasible one.In this thesis, copper micro wire was prepared by chemical reduction method in a kind of biological hard template. Scanning electron microscope (SEM), energy disperse X-ray (EDX) and X-ray diffraction (XRD) experiment methods were applied to characteristic the product. The influences of the reducer content on copper micro wire morphology, density, and deposition time were studied. The results show that the surface of copper micro wire is smooth and the morphology is regular. The higher the reducer content, the faster the deposition rate, but micro wires density decreases, and can result in quality degradation. In addition, the preparations of silver and nickel micro wires by chemical reduction method were also investigated, respectively.Potentiostatic deposition method is used to synthesize nickel micro tubes based on the biological template in NiSO4aqueous solution. The nickel micro tubes were characterized with SEM, EDX and XRD. The effects of depositional potential (-0.1V-1.5V), deposition time, electrolyte concentration and composition on the nickel micro tubes morphology and the thickness of tube wall were researched. The results indicate that, because of that the template channel belongs to very deep-blind hole (1000-2000length-diameter ratio), Ni2+diffusion rate under a certain potential is faster than thermal diffusion in chemical reduce method and the same as the deposition efficiency ratio.