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Preparation method of iron-palladium alloy nanometer wire

A palladium alloy and nanowire technology is applied to iron-palladium alloy nanowires and preparation thereof, and iron-palladium alloy nanowires are prepared by a template method and the field of preparation thereof can solve the problem of small magnetocrystalline anisotropy constant, limited application, The problem of small adjustment of magnetic properties, etc., achieves the effect of short preparation time, reduced preparation cost, and short time consumption

Inactive Publication Date: 2015-06-03
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The magnetocrystalline anisotropy constant of these elemental metals or alloys is small, and the adjustment of magnetic properties is small, which limits their application in ultra-high-density magnetic recording (quantum disk), magnetic sensors and other fields.

Method used

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  • Preparation method of iron-palladium alloy nanometer wire
  • Preparation method of iron-palladium alloy nanometer wire
  • Preparation method of iron-palladium alloy nanometer wire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1: The molar ratio of Fe to Pd in ​​the iron-palladium alloy nanowires prepared in this example is 0.35:1, the diameter of the iron-palladium alloy nanowires is 35-39nm, the line spacing is 60-65nm, and the aspect ratio is greater than 108 , is a polycrystalline structure (fine grains).

[0029] Concrete preparation steps include as follows:

[0030] (1) Anodize the aluminum foil with a constant DC voltage of 40V in the oxalic acid solution with a concentration of 0.2mol / L. In the mixed solution of chromic acid, the oxide film is completely corroded, and then the aluminum foil is put back into the oxalic acid solution and anodized for 2 hours at the same voltage as above; the concentration of the phosphoric acid solution is 4wt%, and the concentration of the chromic acid solution is 3wt%. The mixture of phosphoric acid and chromic acid is to mix equal volumes of phosphoric acid solution and chromic acid solution. The thickness of the film after the second oxid...

Embodiment 2

[0035] Example 2: The molar ratio of Fe to Pd in ​​the iron-palladium alloy nanowires prepared in this example is 0.25:1, the diameter of the iron-palladium alloy nanowires is 30-40nm, the line spacing is 69-75nm, and the aspect ratio is greater than 110. It is a polycrystalline structure with fine grains.

[0036] Concrete preparation steps include as follows:

[0037] (1) Anodize aluminum foil with a constant DC voltage of 35V in an oxalic acid solution with a concentration of 0.4mol / L. The temperature of the solution is controlled at 23°C. After oxidation for 1.5h, an oxide film is obtained on the aluminum foil, and then the aluminum foil is placed in phosphoric acid In the mixed solution of chromic acid, the oxide film is completely corroded, and then the aluminum foil is put back into the oxalic acid solution and anodized for 3 hours at the same voltage as above; the concentration of the phosphoric acid solution is 5wt%, and the concentration of the chromic acid solution ...

Embodiment 3

[0042] Example 3: The molar ratio of Fe to Pd in ​​the iron-palladium alloy nanowire prepared in this example is 0.4:1, the diameter of the iron-palladium alloy nanowire is 30-35nm, the line spacing is 70-80nm, and the aspect ratio is greater than 124. It is a polycrystalline structure with fine grains.

[0043] Concrete preparation steps include as follows:

[0044] (1) Anodize the aluminum foil with a constant DC voltage of 45V in an oxalic acid solution with a concentration of 0.3mol / L. The temperature of the solution is controlled at 25°C. After oxidation for 0.5h, an oxide film is obtained on the aluminum foil, and then the aluminum foil is placed in phosphoric acid In the mixed solution of chromic acid, the oxide film is completely corroded, and then the aluminum foil is put back into the oxalic acid solution and anodized at the same voltage as above for 4 hours; the concentration of the phosphoric acid solution is 6wt%, and the concentration of the chromic acid solution...

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Abstract

The invention relates to an iron-palladium alloy nanometer wire and a preparation method thereof, belonging to the technical field of nanometer materials. The molar ratio of Fe to Pd of the nanometer wire is (0.25-0.4):1; the diameter of the iron-palladium alloy nanometer wire is 30-40 nm; the distance between the wires is 60-80 nm; the ratio of length to diameter is larger than 100; and the wire is in a polycrystal structure. An AAO membrane, which has characteristics of a p type semiconductor and is prepared by anodic oxidation of pure aluminum sulfuric acid, is prepared by adopting a pulse electroplating method. A high-purity aluminum foil, together with the AAO membrane thereon, is used as a cathode, a platinum wire is used as an anode, FeSO4.7H2O and Pd(NH3)2Cl2 are used as main salts, quadrol is used as a pH regulating agent, and the formed solution is electroplating solution, iron-palladium ions are reduced and electroplated at an electroplating potential and filled into nanometer pore paths of the AAO membrane, and then vacuum thermal treatment is performed at 600-950 DEG C so as to obtain the iron-palladium alloy nanometer wire. The method is an iron-palladium alloy nanometer wire preparation method which is simple to operate, good in stability and low in process cost.

Description

technical field [0001] The invention relates to an iron-palladium alloy nanowire and a preparation method thereof, in particular to an iron-palladium alloy nanowire prepared by a template method and a preparation method thereof, belonging to the technical field of nanomaterials. Background technique [0002] At present, the methods for preparing nano-ordered structures include self-organized growth method, underpotential plating method, atomic optics method, atomic manipulation method, scanning probe induction oxidation and corrosion technology, grazing angle electroplating method, nanoimprinting technology, corrosion method and template synthesis, etc. Among them, the template synthesis method includes alumina templates, polymer templates, metal templates, carbon nanotube templates, etc., because it has a relatively low cost and can prepare various nano-ordered structures with a large area, it is easy to carry out mass production , is particularly striking. The commonly u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C5/04C25D5/18C25C5/02C30B29/62C30B29/52C30B28/04
Inventor 张正富徐明丽杜江陈庆华
Owner KUNMING UNIV OF SCI & TECH