Research Of Copper Nanostructural Material

The preparation of mesoscopic, nanometer microstructure is concerned in recent years. In many of methods, it is one of research hot spots that the preparation of nanometer magnitude ordered structure with the metal and the semiconductor characteristic by the electrodeposition. We prepare the microstructure copper nanometer structural material order array design by the accuracy control of potential in the semi-two dimensional electrodeposition process, and analyzed the growth characteristic and the growth mechanism.In the electrodeposition process,the ion transmission includethe ion diffusion,the electro migration and the convection (natural convection and electroconvection). We reduce the electrochemistry solution thickness to several hundred nanometers,suppress the natural convection and the electroconvection and form the semi-two dimensional electrodeposition system,in the which ion electro migration and the ion diffusion are the main transmission form.1. The experiment indicated, when electric field voltage remain constant, the cupric ion transmission speed is invariable, the density of thin cupric sulfate liquid sheet is even, the cupric ion velocity of growth is stable, so there isn't obvious change. The copper nano structural material will grow aperiodicly.2. In research we discovered, when electric field voltage change periodicly, the copper nano structural material will appear the periodic growth phenomenon. When the input voltage oscillation frequency is in some steady range, the width in a growth cycle does not change nearly. When oscilation frequency is different, the width in a growth cycle will change. If the frequency is high, the corresponding width is narrow. Otherwise, the width is wide.3. The analysis indicated that when electric field voltage vary periodicly, the growth speed of cupric ion will vary periodicly together. It will appear the periodic growth phenomenon. Namely: A periodic change of response voltage correspond to the width of structural material growth cycle. If the frequency is high, the corresponding width is narrow. Otherwise, the width is wide. In a growth cycle width, the proportion of average growth time of ridge and the slope is 0.7926 to 1.4. We have established a physical model to demonstrate the process of the copper nanometer structural material grow in the condition of varied voltage frequency, Which provide the basic study of controlling the growth of nanometer structural material.