Preparation method of monocrystalline metal nanowire array based on alumina template
A metal nanowire and alumina template technology, which is applied in the field of preparation of metal nanowire arrays, can solve the problems of imperfect preparation of single crystal nanowires, strict parameter requirements, and complicated processes, and achieves guaranteed magnetic anisotropy, Overcome the effects of high raw material cost and simple process
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Embodiment 1
[0059] Embodiment 1. The preparation of the aluminum oxide template that removes barrier layer
[0060] After ultrasonically cleaning 99.999% aluminum foil with acetone, rinse it repeatedly with acetone, deionized water, and alcohol to remove surface oil, and dry it with nitrogen; then vacuum anneal at 500°C for 10 hours, and naturally cool to room temperature. The annealed aluminum foil is used as the anode, usually as the cathode of the aluminum foil, and the mixed solution of absolute ethanol and perchloric acid with a volume ratio of 9:1 is used as the electrolyte, and the voltage of 12V is used for polishing for 5 minutes. After cleaning, the polished aluminum foil was used as the anode, the graphite was used as the cathode, and 0.3mol / L oxalic acid was used as the electrolyte at a voltage of 40V and a constant temperature of 8°C for 24 hours. The primary oxidized aluminum foil was soaked in a mixed solution of 6wt% phosphoric acid and 1.8wt% chromic acid at 60° C. for 6 ...
Embodiment 2
[0061] Embodiment 2. Preparation of nickel nanoarrays
[0062] Take 1g of nickel chloride, dissolve it in 40mL of deionized water, stir evenly, transfer the solution to an autoclave with a capacity of 50ml, put it into an alumina template covering the aluminum part with polytetrafluoroethylene, seal and heat to 120 ℃, under the action of a 0.25T magnetic field for 24 hours, and then cooled to room temperature to obtain the product; then repeatedly washed with absolute ethanol to remove impurities and pollutants on the surface of the nano-array; then the product was placed in a 40°C vacuum box save in.
[0063] Such as figure 2 As shown, according to the present embodiment, the product is dissolved with sodium hydroxide and washed clean by X-ray diffraction (18KW target X-ray diffractometer, model: MXPAHF, manufacturer: Japanese Ma Ke Company) Fig., all diffraction peak positions correspond to (111), (200), (220) of nickel respectively, surface, display product is nickel; T...
Embodiment 3
[0064] Embodiment 3. Preparation of silver nanoarrays
[0065] Take 0.068g of silver nitrate and dissolve it in 40mL of deionized water. After stirring, transfer the solution to an autoclave with a capacity of 50ml. ℃, heat preservation for 12 hours, and then cooled to room temperature to obtain the product; then repeatedly washed with absolute ethanol to remove impurities and pollutants on the surface of the nano-array; and then the product was stored in a vacuum box at 40°C. Such as Figure 7 Shown, according to the present embodiment product dissolves with sodium hydroxide and washes clean product X-ray diffraction Figure, all diffraction peak positions correspond to (111), (200), (220), (311), (222) face of silver respectively, show that product is silver; Field emission scanning electron microscope (model: Sirion200, manufacturer: FEI Company) Imaging ( Figure 8 ) shows that the product has a highly ordered structure, and the diameter of the nanowire is 40nm. The pe...
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