Nano cable made of magnetic material and half-metallic material and preparation method thereof

Abstract

The invention relates to a nano cable made of a magnetic material and a half-metallic material and a preparation method thereof. The nano cable comprises a nano cable core and a cable shell layer, wherein the cable shell layer is coated outside the nano cable core, and the nano cable core and the cable shell layer are coaxial; the nano cable core is made of half-metallic bismuth, and the nano cable shell layer is made of magnetic metallic nickel; and the diameter of the nano cable core is 20-170nm, and the thickness of the nano cable shell layer is 10-80nm. The preparation method comprises the following steps of: obtaining a through-hole alumina template by adopting a secondary anode oxidation method, evaporating a metallic membrane on the alumina template, carrying out corroding to form a through hole, then depositing in electrolyte to realize the direct electrochemical deposition in the through hole of the alumina template to obtain a nickel (shell) and bismuth (core) nano cable, and finally placing a bismuth core wire and a nickel shell into the through hole thereof and placing into a strongly alkaline solution to corrode the alumina template to prepare the nano cable comprising the bismuth core wire and the nickel shell.

Description

technical field

[0001] The invention relates to a nanometer cable and a preparation method thereof, in particular to a nanometer cable composed of magnetic materials and half-metal materials and a preparation method thereof. Background technique

[0002] Nanocable refers to the nanowire whose core is semiconductor or conductor, and which is coated with heterogeneous conductor or non-conductor nanoshell. The outer shell and core wire are coaxial, and its geometric structure is similar to that of coaxial cable. to the nanoscale. Nanocables with core-shell structure with unique physical properties have attracted widespread attention due to their potential application prospects in nanodevices such as new-generation optical fibers, high-performance solar cells, and nanocomputers. At present, in order to explore and expand the connotation, preparation method and application of nano-cables, people have made some attempts and efforts. For example, in October 2005, the US "Physical...

Examples

Embodiment 1

[0038] Embodiment 1: Complete the preparation successively according to the following steps

[0039] 1) Anodize the aluminum sheet, first place the aluminum sheet in an oxalic acid solution with a concentration of 0.2M, anodize it for 5 hours at a DC voltage of 30V, and then soak it in a mixed solution at a temperature of 50°C for 8 hours; Wherein, the mixed solution is 4wt% phosphoric acid and 2wt% chromic acid at 50°C.

[0040] 2) Anodizing for the second time, repeating the anodizing process of step 1) for the aluminum sheet obtained in step 1), and performing anodic oxidation for the second time on the aluminum sheet to obtain an aluminum sheet with holes at the bottom;

[0041] 3) the aluminum flake obtained after step 2) is oxidized, first remove the unoxidized aluminum on the back side with a supersaturated tin tetrachloride solution, and then corrode the aluminum oxide barrier layer at the bottom of the hole with a 3wt% phosphoric acid solution to obtain a Through-hol...

Embodiment 2

[0046] Embodiment 2: Complete the preparation successively according to the following steps

[0047] 1) Aluminum sheet anodizing, first place the aluminum sheet in an oxalic acid solution with a concentration of 0.3M, anodize it at a DC voltage of 50V for 3h, and then soak it in a mixed solution at a temperature of 50°C for 10h; among them, mixing The solution was 5 wt% phosphoric acid and 3 wt% chromic acid at 50°C.

[0048] 2) Anodizing for the second time, repeating the anodizing process of step 1) for the aluminum sheet obtained in step 1), and carrying out anodizing for the second time on the aluminum sheet;

[0049] 3) the aluminum flake obtained after step 2) is oxidized, first remove the unoxidized aluminum on the back side with a supersaturated tin tetrachloride solution, and then corrode the aluminum oxide barrier layer at the bottom of the hole with a 3wt% phosphoric acid solution to obtain a Through-hole alumina template, the diameter of the through-hole is 70nm; ...

Embodiment 3

[0055] Embodiment 3: Complete the preparation successively according to the following steps

[0056] 1) Aluminum sheet anodizing, first place the aluminum sheet in an oxalic acid solution with a concentration of 0.35M, anodize it at a DC voltage of 60V for 2h, and then soak it in a mixed solution at a temperature of 50°C for 14h; among them, mixing The solution was 5 wt% phosphoric acid and 3 wt% chromic acid at 50°C.

[0057] 2) Anodizing for the second time, repeating the anodizing process of step 1) for the aluminum sheet obtained in step 1), and carrying out anodizing for the second time on the aluminum sheet;

[0058] 3) the aluminum flake obtained after step 2) is oxidized, and the unoxidized aluminum on the back is removed with a supersaturated tin tetrachloride solution, and then the aluminum oxide barrier layer at the bottom of the hole is corroded with a 4wt% phosphoric acid solution to obtain a Through-hole alumina template, the aperture of the through-hole is 90nm...

technical field

[0001] The invention relates to a nanometer cable and a preparation method thereof, in particular to a nanometer cable composed of magnetic materials and half-metal materials and a preparation method thereof. Background technique

[0002] Nanocable refers to the nanowire whose core is semiconductor or conductor, and which is coated with heterogeneous conductor or non-conductor nanoshell. The outer shell and core wire are coaxial, and its geometric structure is similar to that of coaxial cable. to the nanoscale. Nanocables with core-shell structure with unique physical properties have attracted widespread attention due to their potential application prospects in nanodevices such as new-generation optical fibers, high-performance solar cells, and nanocomputers. At present, in order to explore and expand the connotation, preparation method and application of nano-cables, people have made some attempts and efforts. For example, in October 2005, the US "Physical...

Examples

Embodiment 1

[0038] Embodiment 1: Complete the preparation successively according to the following steps

[0039] 1) Anodize the aluminum sheet, first place the aluminum sheet in an oxalic acid solution with a concentration of 0.2M, anodize it for 5 hours at a DC voltage of 30V, and then soak it in a mixed solution at a temperature of 50°C for 8 hours; Wherein, the mixed solution is 4wt% phosphoric acid and 2wt% chromic acid at 50°C.

[0040] 2) Anodizing for the second time, repeating the anodizing process of step 1) for the aluminum sheet obtained in step 1), and performing anodic oxidation for the second time on the aluminum sheet to obtain an aluminum sheet with holes at the bottom;

[0041] 3) the aluminum flake obtained after step 2) is oxidized, first remove the unoxidized aluminum on the back side with a supersaturated tin tetrachloride solution, and then corrode the aluminum oxide barrier layer at the bottom of the hole with a 3wt% phosphoric acid solution to obtain a Through-hol...

Embodiment 2

[0046] Embodiment 2: Complete the preparation successively according to the following steps

[0047] 1) Aluminum sheet anodizing, first place the aluminum sheet in an oxalic acid solution with a concentration of 0.3M, anodize it at a DC voltage of 50V for 3h, and then soak it in a mixed solution at a temperature of 50°C for 10h; among them, mixing The solution was 5 wt% phosphoric acid and 3 wt% chromic acid at 50°C.

[0048] 2) Anodizing for the second time, repeating the anodizing process of step 1) for the aluminum sheet obtained in step 1), and carrying out anodizing for the second time on the aluminum sheet;

[0049] 3) the aluminum flake obtained after step 2) is oxidized, first remove the unoxidized aluminum on the back side with a supersaturated tin tetrachloride solution, and then corrode the aluminum oxide barrier layer at the bottom of the hole with a 3wt% phosphoric acid solution to obtain a Through-hole alumina template, the diameter of the through-hole is 70nm; ...

Embodiment 3

[0055] Embodiment 3: Complete the preparation successively according to the following steps

[0056] 1) Aluminum sheet anodizing, first place the aluminum sheet in an oxalic acid solution with a concentration of 0.35M, anodize it at a DC voltage of 60V for 2h, and then soak it in a mixed solution at a temperature of 50°C for 14h; among them, mixing The solution was 5 wt% phosphoric acid and 3 wt% chromic acid at 50°C.

[0057] 2) Anodizing for the second time, repeating the anodizing process of step 1) for the aluminum sheet obtained in step 1), and carrying out anodizing for the second time on the aluminum sheet;

[0058] 3) the aluminum flake obtained after step 2) is oxidized, and the unoxidized aluminum on the back is removed with a supersaturated tin tetrachloride solution, and then the aluminum oxide barrier layer at the bottom of the hole is corroded with a 4wt% phosphoric acid solution to obtain a Through-hole alumina template, the aperture of the through-hole is 90nm...

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