Preparation And Research Of Ni-Sn(Co) Alloy Nanorods Based On Nanoporous Anodic Alumina

Porous anodic aluminum oxide(AAO)is often used as a template for the synthesis of nanomaterials because of its highly ordered pore structure,which plays a decisive role in the growth structure of nanomaterials.However,the discovery of porous photonic crystal anodic aluminum oxide(PC-AAO)has aroused widespread concern for threedimensional nanomaterials.PC-AAO has the characteristics of highly ordered microstructure,adjustable pore shape,corrosion resistance and high pressure resistance.In addition,PC-AAO,as a kind of super material,has been paid more and more attention because of its simple preparation process,convenient operation and cheap raw materials.PC-AAO has its own photonic band gap,which is the reason for its own band structure color,so it has a wide application prospect in many fields.In this paper,we mainly focus on the following three aspects of photonic crystals:1.In this paper,the double-sided anodized alumina photonic crystal film is prepared based on the anodizing method,which is basically in the "transparent" state.It is found that on the basis of two-step anodizing,adjusting the pulse signal can quickly prepare the double-sided anodized alumina photonic crystal film with ultra-thin aluminum base,and the morphology of the double-sided anodized alumina photonic crystal is established.Based on the theoretical analysis,the reason for the blue shift of the structure color of the lower surface of the double-sided anodized alumina photonic crystal is explained reasonably.2.The layered composite magnetic metal nanorods with the same periodic structure as the photonic crystal have been successfully prepared by combining the anodizing method and the alternating current chemical deposition method in this paper.It is found that the film can show the structural color with high color saturation without removing the aluminum base after composited metal materials,which greatly solves the problem that the color can only be developed after the aluminum base is removed,but the film is fragile.3.The magnetic properties of Ni-Co composite metal photonic crystal films prepared by replacing the deposited materials have been greatly optimized.The coercive force of the films is as high as 1370 oe in the vertical magnetic field direction.In the experimental study,it is found that the effect of pore enlargement can be achieved by soaking the template in the deposition solution,and with the increase of soaking time,the structural color of Ni-Co composite metal photonic crystal film gradually shifts to red,combining with the Bragg formula,a reasonable explanation is given for this phenomenon.