Compound type multilayer film structure silver nanowire and preparation method thereof

Abstract

The invention discloses a compound type multilayer film structure silver nanowire and a preparation method thereof. The method of combining the physical deposition technology and annealing treatment is mainly adopted, a [Ag 20-30nm / SiO2 3-5nm]n nano-multilayer film array is prepared on a two-dimensional ordered colloidal sphere mold through the magnetron sputtering technology and further subjected to annealing treatment under the protection of argon, and thus the silver nanowire grows on the surface of a compound type multilayer film structure. According to the method, preparation cost is low, and consumed time is short. The method has the characteristics that the structure is stable, the controllability is high and the purity is high. Silicon dioxide and silver are combined together, the silicon dioxide can change the dielectric environment around metal and can protect the silver against oxidization, and thus the survival time of the silver nanowire structure is longer. In addition, the structure has abundant hot spots and high surface enhanced Raman scattering (SERS) activity and can be applied to the fields of molecular detection, recognition technology, electronics, magnetic, acoustics, optics and the like.

Description

technical field

[0001] The invention belongs to the technical field of nano functional materials. Background technique

[0002] Nanomaterials have many unique properties and special applications. The particularity of their structure leads to macroscopic physical effects of sound, light, electricity, magnetism, heat, mechanics, etc. that are different from conventional materials, which are reflected in quantum size effects, Small size effect, surface effect and macroscopic tunnel effect have become the hotspots of current research. Nanomaterials have a low light reflection coefficient, can efficiently convert solar energy into electrical energy and heat energy, and as additives can also enhance toughness and strength, and have huge development space in the fields of electronics, magnetism, acoustics, optics, etc. and potential value. As a one-dimensional inorganic nanomaterial, silver nanowires have been widely used in the fields of polarizing devices, photonic crystals, ca...

Examples

Embodiment 1

[0020] First, a single-layer two-dimensional ordered colloidal ball template was prepared by self-assembly technology. figure 1 Middle a is the schematic diagram of colloidal ball template. The specific steps are: put the silicon wafer substrate into a mixed solution containing ammonia, hydrogen peroxide and water (volume ratio 1:2:6) and boil for five minutes, then ultrasonically clean it three times with deionized water and ethanol solution successively. One of the silicon wafers was soaked in 10% sodium lauryl sulfate solution for 24 hours to obtain a hydrophilic substrate surface, and the rest were stored in deionized water to be used as colloidal ball template substrates. Take a polystyrene solution with a volume ratio of 1:1 and mix it with deionized water, and then take a drop of the mixed solution and drop it on the silicon wafer substrate soaked in the sodium lauryl sulfate solution. After the solution is evenly diffused, slowly Immerse it in a container filled with ...

Embodiment 2

[0025] The difference between this embodiment and embodiment 1 is that the magnetron sputtering technology is used to sequentially deposit 20-30nm silver and 3-5nm silicon dioxide on the two-dimensional ordered colloidal sphere template, and the cyclic deposition period can be 1~ 5 cycles. The technical effect achieved is the same as that of Embodiment 1.

Embodiment 3

[0027] The difference between this embodiment and embodiment 1 is that [Ag 30nm / SiO 2 5nm] n The nano-multilayer film array is immersed in tetrahydrofuran, chloroform, toluene and other organic solvents to remove the polystyrene two-dimensional ordered colloidal ball sequence template. The technical effect achieved is the same as that of Embodiment 1.

technical field

[0001] The invention belongs to the technical field of nano functional materials. Background technique

[0002] Nanomaterials have many unique properties and special applications. The particularity of their structure leads to macroscopic physical effects of sound, light, electricity, magnetism, heat, mechanics, etc. that are different from conventional materials, which are reflected in quantum size effects, Small size effect, surface effect and macroscopic tunnel effect have become the hotspots of current research. Nanomaterials have a low light reflection coefficient, can efficiently convert solar energy into electrical energy and heat energy, and as additives can also enhance toughness and strength, and have huge development space in the fields of electronics, magnetism, acoustics, optics, etc. and potential value. As a one-dimensional inorganic nanomaterial, silver nanowires have been widely used in the fields of polarizing devices, photonic crystals, ca...

Examples

Embodiment 1

[0020] First, a single-layer two-dimensional ordered colloidal ball template was prepared by self-assembly technology. figure 1 Middle a is the schematic diagram of colloidal ball template. The specific steps are: put the silicon wafer substrate into a mixed solution containing ammonia, hydrogen peroxide and water (volume ratio 1:2:6) and boil for five minutes, then ultrasonically clean it three times with deionized water and ethanol solution successively. One of the silicon wafers was soaked in 10% sodium lauryl sulfate solution for 24 hours to obtain a hydrophilic substrate surface, and the rest were stored in deionized water to be used as colloidal ball template substrates. Take a polystyrene solution with a volume ratio of 1:1 and mix it with deionized water, and then take a drop of the mixed solution and drop it on the silicon wafer substrate soaked in the sodium lauryl sulfate solution. After the solution is evenly diffused, slowly Immerse it in a container filled with ...

Embodiment 2

[0025] The difference between this embodiment and embodiment 1 is that the magnetron sputtering technology is used to sequentially deposit 20-30nm silver and 3-5nm silicon dioxide on the two-dimensional ordered colloidal sphere template, and the cyclic deposition period can be 1~ 5 cycles. The technical effect achieved is the same as that of Embodiment 1.

Embodiment 3

[0027] The difference between this embodiment and embodiment 1 is that [Ag 30nm / SiO 2 5nm] n The nano-multilayer film array is immersed in tetrahydrofuran, chloroform, toluene and other organic solvents to remove the polystyrene two-dimensional ordered colloidal ball sequence template. The technical effect achieved is the same as that of Embodiment 1.

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