Method for continuously fabricating silver nanowire

Abstract

The invention discloses a method for continuously fabricating silver nanowires. The method mixes a glycol solution of a silver salt and a glycol solution of a polyvinyl pyrrolidone, and the mixed solution reacts in a temperature range and a time range to form the silver nanowires. The polyvinyl pyrrolidone has high boiling point and reduction ability so as to reduce the silver salt to the silver nanoparticles, and simultaneously, the polyvinyl pyrrolidone can provide barriers for limiting the particle growth. Besides, the oxygen functional groups on the long chains of the polyvinyl pyrrolidone can keep the stably one-dimensional growth of the silver nanoparticles to form the silver nanowires during the aging process.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The invention relates to a method for continuously fabricating silver nanowires, and more particularly, the invention relates to a method for mass-producing high quality silver nanowires.[0003]2. Description of the Prior Art[0004]One-dimensional nanostructure, such as nanowire, nanotube, nanorod, or nanofiber, has different characteristics from the one-dimensional macro-material. Recently, many businesses and groups continuously research the applications of the one-dimensional nanostructure and earn some important achievements. The applications include ultra-thin full-color LED panel, photocopy apparatus, field emission display, low power-consumption nanowire LED, and sensor for sensing NH3 or H2.[0005]One-dimensional metal nanostructure, such as gold, tin, silver, or platinum nanowire, has well electrical characteristics so as to be applied to the materials of leading wires. Because the micro-effects, such as the surfa...

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Benefits of technology

[0013]The advantage and spirit of the invention may be understood

Problems solved by technology

Silver is an optimum metal conductive material, therefore, the applications of silver nanowires are considered as important issues.

However, for the one-dimensional nanostructures, only the nanotubes but not the one-dimensional metal nanomaterials with high conductive effect are commercialized in the business situations.

Although several methods for fabricating one-dimensional metal nanowires exist, the methods have some disadvantages to commercialization.

The nanowires fabricated by AAO method have small diameters and fine uniformity, but the processes of AAO method are complex and then it does not suit for mass-production.

For the reason, AAO method is disadvantageous for commercialization.

Electron beam spinning method and catalyst growth method can control the growing position of metal nanowires, however, similarly, the processes of electron beam spinning method and catalyst growth method are complex and the cost of the equipment required is high.

For the reason, electron beam spinning method and catalyst growth method are disadvantageous for commercialization.

Core-shell growth method treats the carbon nanotubes as cores and coats films on the carbon nanotubes to form multi-functional composite materials, however, the diameters of the multi-functional composite materials are larger and the uniformity thereof is not easy to control, and furthermore, the processes are complex and the cost is quite high.

As described above, chemical pyrolysis method is more suitable for mass-producing silver nanowires than other method, however, the problems of this method are that the larger particles grow according to condensation effect, and the high temperature reaction is suitable for batch fabricating so that the capacity is still not enough.

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