Preparing method for metal and alloy micro-nano structure or nanowire array of metal

Abstract

The invention belongs to the technical field of material science and engineering and relates to a pressure molding preparing method for preparing metal and an alloy micro-nano structure or nanowire array of the metal through compression molding. The method includes the following steps that firstly, a metal sheet or an alloy sheet is subjected to surface treatment; secondly, a mold plate is prepared; thirdly, compression molding is conducted; fourthly, demounting is conducted; and fifthly, demolding is conducted. By means of the method, the requirement for a complex cyclic voltammetry pulse electrodeposition technology is avoided, no organic surface active agent needs to be added, and complex sensitizing and activating treatment does not need to be conducted on a hole wall of the mold plate. By the adoption of the method, large-range and uniform metal nanowires (such as Au, Ag, Cu, Fe and Ni nanowires) similar to single crystals and gold and silver solid solution alloy nanowires (such as Au26Ag74 nanowires) can be obtained. By means of the preparing method, low-cost controllable batched preparation of metal and alloy micro-nano structures or nanowires of the metal can be achieved, and the preparing method is of important and profound significance in revealing basic performance principles of metal and alloys of the metal or wide and deep application.

Description

technical field [0001] The invention belongs to the technical field of material science and engineering, and relates to a method for preparing metal and its alloy micro-nano structure or nano-wire array by molding. Background technique [0002] Since Sumio Iijima of Japan first reported carbon nanotubes in 1991, one-dimensional nanomaterials have attracted extensive attention from researchers. One-dimensional nanostructures include nanowires, nanorods, nanotubes, and nanoribbons. Because metal nanowires are in the nanometer scale in the two-dimensional direction, their quantum size effects, surface effects, quantum tunneling effects, and dielectric confinement effects will cause them to exhibit different forces, heat, light, Macroscopic properties such as electricity and magnetism have attracted the attention of scientists in the fields of condensed matter physics, chemistry, and materials science, and have become a hot spot in the research of nanomaterials in recent years. ...

AI Technical Summary

Problems solved by technology

However, these methods have their insurmountable shortcomings

The electrodeposition method will have chemical pollution during the preparation process, and the prepared nanowires are polycrystalline; the external field induction method needs to introduce expensive magnetic field equipment, and the production efficiency is low; the self-assembly method must add organic surfactants or Need to sensitize and activate the pore wall of the template

These existing experimental methods are not only complicated and cumbersome in the experimental process, but also cause certain environmental pollution.

More importantly, the obtained nanowires are generally polycrystalline, and the conductivity between the nanowires and the bottom supporting substrate is not good.

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