Method for high concentration mass-synthesis of silver nano-wire

Abstract

The invention belongs to the technological field of nanometer material, in particular to a method for synthesizing mass silver nano-wires of high concentration. The method takes silver nitrate as the silver source and stainless steel as an assistant agent. The material protected by inactive gas is oil-bathed at the temperature of 100 to 200 DEG C for 30 to 300 min in a recycling device, then silver nano-wires of the diameter of 50 to 800 nanometers and the length of 1 micrometer to 100 micrometers can be obtained, and the composition of the product is pure silver. The silver nano-wires made by the method have the advantages of regular crystal structure, large specific surface and controllable thickness and length. The silver nano-wires have wide application value in the field of optics, electricity and material, synthesis of polymer composites that is electricity and heat conductive, electrical radiation and static electricity proof and antibacterial, assembly of nanometer devices, design of advanced catalyst, biological fluorescence label, micro transmission, nanometer memory material, reinforced fluorescence and enhanced Raman spectroscopy, etc.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, and in particular relates to a method for preparing silver nanowires by using silver nitrate as a silver source. Background technique [0002] The research of nanotechnology has been widely concerned, and is known as one of the three major technologies in the 21st century, which has important economic and social value. Silver is the metal with the best electrical conductivity. It has good chemical and catalytic properties, excellent antibacterial properties and biocompatibility, so it is widely used in electronics, chemical engineering, biomedicine, medicine, daily necessities and other industries. One-dimensional silver nanowires, due to their small size, high aspect ratio, large specific surface, and unique physical and chemical properties, can be used as wires and switches in nanoelectronic devices to develop new conductive or biomedical composite materials. Or develop efficient c...

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Problems solved by technology

Template electrochemistry uses alumina templates usually combined with electrochemical deposition techniques (Sun XY, Xu FQ, Li ZM, Zhang WH., Mater. Chem. Phys. 2005, 90, 69-72.; Pang Y T, Meng G W, Fang Q, Zhang L D et al, Nanotechnology 2003, 14, 20-24.; Wang Y W, Zhang L D, Meng G W, Peng XS, Jin YX, Zhang J., J. Phys. Chem. B2002, 106, 2502-2507. ; J.Choi, G.Sauer, K.Nielsch, R.B.Wehrspohn, U.Gsele, Chem.Mater.2003, 15, 776-779.), but the template method requires a prefabricated template, and the quality and quantity of the channel determine the obtained The quality and quantity of nanomaterials, and the subsequent technique of removing the template is cumbersome, and it is easy to damage the nanomaterials, and the obtained nanomaterials are also easy to agglomerate, which is not conducive to a single operation or measurement

There are many kinds of preparation methods by wet chemical method (Sun, Y.; Yin, Y.; Mayers, B.T.; Herricks, T.; Xia, Y. Chem. Mater. 2002, 14, 4736.; Jana, N.R.; Gearheart, L.; Murphy, C.J.Chem.Comm.2001, 7, 617.; Caswell, K.K.; Bender, C.M.; Murphy, C.J.Nano Lett.2003, 3, 667.), but generally suitable for very dilute solution synthesis, concentration Raising often only results in silver granular products

The above preparation methods limited to the laboratory scale have brought certain difficulties to large-scale industrial application

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