A kind of preparation method of reticular gold-silver composite nano film

Abstract

The invention discloses a method for preparing a net-shaped gold-silver composite nano film, which belongs to the field of nano material preparation. The specific method is to first prepare a layer of gold or silver nano film on the substrate by physical vapor deposition, and then anneal under vacuum or inert gas to form a gold or silver material with a network nanostructure; on this basis, spin-coat a layer of photoresist, and expose, bake, and develop one side of the transparent substrate to remove the photoresist coating in the holes of the gold or silver material with a network nanostructure, leaving the photoresist coating directly above it , and based on this, perform a secondary physical vapor deposition process to prepare a layer of second gold or silver nanomaterials; after completion, lift off to remove the photoresist attached directly above the gold or silver material with a network nanostructure The coating and the second gold or silver nanomaterial leave the second gold or silver nanomaterial filled in the holes to form a network-like gold-silver composite nano-film with surface plasmon effect.

Description

technical field [0001] The invention belongs to the field of nanometer material preparation, in particular to a method for preparing a network-like gold-silver composite nanofilm. Background technique [0002] In recent years, noble metal nanomaterials have aroused widespread interest in the field of nanotechnology due to their unique optical, electrical, mechanical, catalytic and biocompatibility properties, and nanomaterials that meet different application fields are the basis of nanotechnology applications. Therefore, nanomaterial preparation technology has always been a hot spot of concern. [0003] The surface plasmon effect of metal nanoparticles is due to the fact that the electron cloud on the surface of the nanoparticle is excited by the electric field in the incident electromagnetic wave (or incident light), and interacts to form surface plasmons. Such surface plasmons can generate an electric field whose magnitude is 10 times higher than that of the incident elec...

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Problems solved by technology

[0004] In order to solve the defect that the optical properties of the nanocomposite film cannot be adjusted in the prior art, the present invention provides a method for preparing a mesh-shaped gold-silver composite nanofilm, which can be based on the two metals of gold and silver in the gold-silver composite nanofilm. Tuning the Surface Plasmon Spectrum of Thin Films by Volume Ratio

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