Preparation method for silver nanoparticle chain

Abstract

The invention discloses a preparation method for a silver nanoparticle chain. At first, an aluminum sheet is processed through an anodic oxidation method so that a through-hole alumina template is obtained; a gold film is plated on one side of the through-hole alumina template in an evaporated mode and then the through-hole alumina template is used as a negative pole and placed in silver electrolyte and bismuth electrolyte respectively for multiple times of alternative electrolytic depositions, so that the alumina template is obtained, wherein the through holes of the through-hole alumina template are placed with the silver cylinders and the bismuth cylinders, the silver cylinders and the bismuth cylinders are connected alternatively and one side of the alumina template is plated with the gold film; then the alumina template is soaked in aqueous alkali, so that a nanowire array which is formed by the alternative connection of the silver cylinders and the bismuth cylinders is obtained; and then the nanowire array is placed in ethylalcohol for ultrasonic dispersion, so that a nanowire which is formed by the alternative connection of the silver cylinders and the bismuth cylinders is obtained; and the nanowire which is formed by the alternative connection of the silver cylinders and the bismuth cylinders is placed in an environment with a vacuum degree<=10 Pa to 3 Pa and a temperature 450 DEG C to 500 DEG C to be annealed for 2 hours to 6 hours, so that a target product is obtained. The preparation method for the silver nanoparticle chain has the advantages of being simple in process, low in cost, high in practical value, and capable of being widely used in the preparation of one-dimensional nanoparticle chains of various metal materials.

Description

technical field [0001] The invention relates to a method for preparing particle chains, in particular to a method for preparing silver nanoparticle chains. Background technique [0002] With the rapid development of modern information technology and the high integration of computers and optical transmission circuits, the requirements for miniaturization and high integration of devices are getting higher and higher, which requires the transmission and processing of information at the nanoscale. One-dimensional noble metal nanoparticle chains are an important optical waveguide nanostructure that can manipulate and control photons at the nanoscale to achieve diffraction-limited light transmission beyond the light. At present, people have made some attempts and efforts to obtain one-dimensional precious metal nanoparticle chains, such as "a silver nano-superstructure array and its preparation method and application" published on November 9, 2011 by the Chinese invention patent a...

AI Technical Summary

Problems solved by technology

However, there are deficiencies in the preparation method of this one-dimensional necklace-shaped silver nano-superstructure line composed of silver nano-superstructure balls. First, the process is complicated. Patterns need to go through the process of applying glue on the silicon wafer according to the pattern, electron beam exposure, development, ion beam etching, degumming and cleaning, which is laborious and time-consuming; secondly, the ion beam etching process needs to use expensive equipment, so that the cost of production remains high; finally, the patterned silicon wafer needs to be placed in the silver ion-cysteine ​​complex solution for 1 to 3 days, and the long production time also increases the production cost and The difficulty of large-scale application

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