Preparation method of metal nanometer line with controllable size

Abstract

The invention discloses a preparation method of a metal nanometer line with a controllable size. The method comprises the following steps: first, using a secondary anodic oxidation method to obtain a through hole alumina template which is provided with peripheral aluminum and has the aperture of 30 nm to 70 nm; second, using an ion sputtering method to evaporate a gold film with the thickness of 90 nm to 130 nm on one side of the through hole alumina template , putting one non-evaporated surface of the through hole alumina template upwards, then, dripping an aqueous solution of metal chloride on the through hole alumina template and soaking for 1 hour to 3 hours, and afterwards, cleaning with water and drying; and third, putting the through hole alumina template with the metal nanometer line arranged in a hole into a strong slkali solution to erode the alumina template so as to prepare the metal nanometer line with the controllable size. The invention can evaporate the gold film at one side of the anodic alumina template by the reduction action of aluminum, can deposit the metal nanometer line in a nanometer pore canal of the anodic alumina template with peripheral aluminum, has stronger universality and simple operation and can manually effectively control the size of the prepared metal nanometer line.

Description

technical field [0001] The invention relates to a method for preparing nanowires, in particular to a method for preparing size-controllable metal nanowires. Background technique [0002] Metal nanowires have good electrical conductivity and have broad application prospects in various electronic devices. For a long time, people have been tirelessly studying its preparation method, such as "an iron nanowire and its preparation method" disclosed in Chinese Invention Patent Application Publication CN 1843671A published on October 11, 2006. It intends to provide a wet chemical process to make iron nanowires. The specific steps are as follows: after dissolving soluble ferrous salt or ferric salt in distilled water, first use nitric acid or sulfuric acid or hydrochloric acid and ammonia water to adjust the pH value to 1-3, then add surfactant and complexing agent to it in turn, and then , adding a solution containing a reducing agent to it under stirring conditions, using a chemi...

AI Technical Summary

Problems solved by technology

However, this preparation method has disadvantages. First, it is not universal and can only produce iron nanowires, but not other metal nanowires; secondly, the manufacturing process is complicated and requires more raw materials. The use of surfactants and complexing agents also has certain pollution to the environment

Although there are also template electrochemical deposition or electroless chemical deposition methods to prepare metal nanowires, however, both methods have defects: although electrochemical deposition methods can be used to prepare metal nanowires with controllable size, but in the preparation DC or AC power must be used in the process; while using the electroless chemical deposition method, it is difficult to effectively control the length of the metal nanowires, and the hole wall of the template usually needs to be complicatedly modified before electroless deposition

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