Silver nanoparticle film with mixed valent state, preparation method thereof and application thereof

A technology of silver nanoparticles and mixed valence states, which is applied in the field of nanomaterials and electric storage films, and can solve the problems of unfavorable silver nanoparticle film preparation, high annealing temperature, and unfavorable mass production.

Inactive Publication Date: 2013-11-27
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the high annealing temperature, it is not conducive to the preparation of large-area silver nanoparticle films, nor is it conducive to mass production.

Method used

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  • Silver nanoparticle film with mixed valent state, preparation method thereof and application thereof
  • Silver nanoparticle film with mixed valent state, preparation method thereof and application thereof
  • Silver nanoparticle film with mixed valent state, preparation method thereof and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0025] At a pressure of 2×10 -3 In a vacuum chamber of Pa, a silver film with a thickness of about 4.5 nm was deposited on a clean and flat mica surface by vacuum thermal evaporation. The thin film samples were then annealed at a temperature of about 150°C in the atmosphere. After cooling, they were observed with a scanning electron microscope (SEM). The SEM image of the sample annealed for 10 minutes is as figure 1 Shown; the SEM image of the sample annealed for 90 minutes is shown in figure 2 shown. Both images show that the particles are evenly distributed, most of the particles are between 20 and 40 nanometers in size, a few larger ones are about 50 nanometers, and a few smaller ones are about 10 nanometers.

[0026] The samples annealed for 90 minutes were analyzed by XPS, such as image 3 shown. It shows that elemental silver accounts for 56.3%, monovalent silver accounts for 33.2%, and divalent silver accounts for 10.5% in the sample. This indicates that the s...

Embodiment 2

[0028] At a pressure of 2×10 -3 In a vacuum chamber of Pa, a silver film with a thickness of about 4.5 nanometers is deposited on a clean and flat silicon wafer surface by vacuum thermal evaporation. The thin film samples were then annealed at a temperature of about 150°C in the atmosphere. After cooling, they were observed with a scanning electron microscope (SEM). The SEM image of the sample annealed for 90 minutes is as Figure 4 shown. The image shows that the particles are evenly distributed, most of the particles are in the range of 20 to 40 nanometers, a few larger ones are about 50 nanometers, and a few smaller ones are about 10 nanometers.

Embodiment 3

[0030] At a pressure of 2×10 -3 In a vacuum chamber of Pa, a 200 nanometer thick aluminum film is deposited on a clean and flat glass slide by vacuum thermal evaporation method, and placed for later use. A silver film about 4.5 nm thick is then deposited on the surface of the aluminum film. The thin film samples were then annealed at a temperature of about 150°C in the atmosphere. After cooling, they were observed with a scanning electron microscope (SEM). The SEM image of the sample annealed for 90 minutes is as Figure 5 shown. The image shows that the particles are evenly distributed, most of the particles are 20-40 nanometers in size, a few larger ones are about 50 nanometers, and a few smaller ones are about 10 nanometers.

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Abstract

The invention belongs to the technical field of nano materials and electric storage films, and in particular relates to a silver nanoparticle film with a mixed valent state, a preparation method thereof and application thereof. The preparation method comprises the following steps of: depositing a silver film with the nano thickness in vacuum environment by taking a smooth solid surface as a substrate, and annealing at the temperature of between 150 and 180 DEG C to form the silver nanoparticle film which is uniform in distribution and has the mixed valent state on the surface of a substrate. The preparation method is simple and low in annealing temperature, and is particularly suitable for the preparation and batch production of the large-area silver nanoparticle film. The silver nanoparticle film is embedded between two electrodes, so that electric storage film devices with high performance are formed.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials and electrical storage thin films, and in particular relates to a silver nanoparticle thin film with mixed valence states and a preparation method thereof. The invention also uses the nano particle thin film as an electric storage medium for preparing electric storage thin film devices. Background technique [0002] Silver (Ag) nanoparticle materials have unusual thermal, optical, electrical, magnetic, catalytic and sensitive properties. Nanoscale silver particles also have antibacterial and deodorizing functions, and have strong bactericidal ability, and have been widely used in the fields of medicine and antibacterial. In recent years, the application field of silver nanoparticle materials has been further expanded, for example, it is also used in the field of surface plasmon photonics [(1) Wei Hong, Xu Hongxing, New progress in the research of surface plasmon photonics, Chinese Sc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C14/58C23C14/14C23C14/24G11C16/02
Inventor 徐伟李鲁曼
Owner FUDAN UNIV
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