Nano chain composed by metallic nickel particles connected by copper oxide fimls and preparation method thereof

Abstract

The invention discloses a nano chain composed by metallic nickel particles connected by copper oxide films and a preparation method thereof. The nano chain is formed by the alternative connection of the metallic nickel particles and the copper oxide fims, wherein the diameter of each metallic nickel particle is 6 nm to 130 nm, the film length of each copper oxide film is 15 nm to 50 nm, the film width of each copper oxide is 30 nm to 50 nm and the film thickness of each copper oxide is 1 nm to 10 nm. The preparation method of the nano chain composed by the metallic nickel particles connected by the copper oxide films comprises the following steps: firstly, an aluminum sheet is processed through an anodic oxidation method so that a through-hole alumina template is obtained; a gold film is plated on one side of the through-hole alumina template in an evaporated mode and then the through-hole alumina template is used as a negative pole and placed in copper electrolyte and nickel electrolyte respectively for multiple alternative electrolytic depositions, so that the alumina template is obtained, wherein the through holes of the through-hole alumina template are placed with the copper cylinders and the nickel cylinders, the copper cylinders and the nickel cylinders are connected alternatively and one side of the alumina template is plated with the gold film; then the alumina template is soaked in aqueous alkali, so that a nano chain array which is formed by the alternative connection of copper oxide films and nickel particles is obtained; and finally the nano chain array is placed in ethylalcohol for ultrasonic dispersion, so that target production is obtained. The nano chain composed by the metallic nickel particles connected by the copper oxides and the preparation method thereof can be widely applied to magnetic recording, micro-mechanical sensors and biological medicine filed, such as the deliver of medicine, hyperthermia and magnetic separation.

Description

technical field [0001] The invention relates to a nano-chain and a preparation method thereof, in particular to a nano-chain composed of a copper oxide film connected with metal nickel particles and a preparation method thereof. Background technique [0002] Nickel metal is widely used in many fields due to its magnetic properties, electrical conductivity, thermal conductivity, and stable chemical properties. Recently, people have made various attempts and efforts in order to further explore and expand the application range of metallic nickel, such as "a method for preparing magnetically encoded nanowires and its use". The invention patent application literature discloses a copper / nickel / copper nanowire and its preparation method. It first uses an anodized aluminum template with blind holes as an electrode, and then places it in a copper electrolyte for electrochemical deposition and ultrasonic washing. Electrochemical deposition in nickel electrolyte, ultrasonic washing, ...

AI Technical Summary

Problems solved by technology

However, there are deficiencies in both the product and its preparation method. First of all, although the nanowires connected in series by copper, nickel, and copper can be used as markers for multiple simultaneous immunoassays, they are difficult to detect due to their specific surface area. In particular, the specific surface area of ​​nickel magnetic particles is limited, which is not conducive to the addition and detection of biomolecules; secondly, the preparation method cannot obtain high specific surface area of ​​nickel magnetic particles in the product.

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