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Submicron non metallic microsphere with metal and electrolyle double layer anao film and its preparation method

A sub-micron, non-metallic technology, applied in the field of sub-micron non-metallic microspheres and preparation, can solve the problems of lack of technical means, technical difficulty, uneven thickness control, etc., to achieve low equipment requirements, wide material range, size wide range of effects

Inactive Publication Date: 2004-02-18
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the technical difficulty of submicron non-metallic microspheres coating metal-dielectric bilayer nanofilms is relatively difficult, and there is still a lack of effective technical means
Existing technologies for coating nano-metal films usually use other media, which inevitably introduces other impurities. The composition of the film layer is impure and the uniformity of the microstructure is poor. It is difficult for the dielectric layer to grow on the metal surface, and the thickness is controlled. unevenness, etc., which limit their application

Method used

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  • Submicron non metallic microsphere with metal and electrolyle double layer anao film and its preparation method
  • Submicron non metallic microsphere with metal and electrolyle double layer anao film and its preparation method

Examples

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Effect test

Embodiment 1

[0024] 0.03g of 300nm silica glass microspheres are added into a mixed solution of ethanol-water (molar ratio 0.5±0.3) of sodium hydroxide (0.2mol) and sodium carbonate (0.2±1mol) to react for 10-120 minutes. Then under ultrasonic vibration, add hydrochloric acid (0.1±0.3mol), tin dichloride (0.3±0.3mol) and deionized water (50±10mol) mixed solution at 5~80℃ for 2~ 120 minutes. Then add silver nitrate (0.2±0.1mol), ammonia water (0.01±0.005mol), formaldehyde (0.2±0.1mol) in ethanol-water (molar ratio 0.5±0.3), adjust the pH value to 9~12. 10~60 After 10 minutes, add it to the mixed solution composed of silver nitrate (0.2±0.1mol), ammonia water (0.01±0.005mol), formaldehyde (0.2±0.1mol) ethanol-water mixed solution (molar ratio 0.5±0.3), in 10~ After standing in an environment of 80° C. for 1 to 120 hours, submicron glass microspheres coated with a metal film with a thickness of about 8 nanometers are obtained. Then transfer to ammonia water (0.001±0.005mol), tetraethyl orth...

Embodiment 2

[0026] Add hydrochloric acid (0.1±0.3mol), tin dichloride (0.2±0.3mol) and deionized water (50±10mol) to 0.03g of 100nm polystyrene microspheres under ultrasonic vibration at 20-30°C In the mixed solution, the time ranges from 2 to 120 minutes. Then add silver nitrate (0.01±0.0051mol), ammonia water (0.01±0.005mol), formaldehyde (0.01±0.005mol) in ethanol-water (molar ratio 0.5±0.3), adjust the pH value to 8~11. 10~60 After 10 minutes, add it to the mixed solution composed of silver nitrate (0.01±0.005mol), ammonia water (0.01±0.005mol), formaldehyde (0.01±0.005mol) ethanol-water mixed solution (molar ratio 0.5±0.5), in 10~ After standing in an environment of 80° C. for 1 to 120 hours, polystyrene microspheres coated with a metal film with a thickness of about 5 nanometers are obtained. Then transferred to ammonia (0.001 ± 0.005mol), tetraethyl orthosilicate (1 ± 5 × 10 -6 mol), deionized water (0.01±0.05mol), methanol (5±5mol), ethanol (5±5mol), isopropanol (7±5mol) in a mi...

Embodiment 3

[0028]0.03g of 400nm silica glass microspheres are added into a mixed solution of ethanol-water (molar ratio 0.5±0.3) of sodium hydroxide (0.2mol) and sodium carbonate (0.2±1mol) to react for 10-120 minutes. Then, under ultrasonic vibration, add hydrochloric acid (0.1±0.3mol), tin dichloride (0.2±0.3mol), deionized water (50±10mol) mixed solution at 5~80°C for 2~ 120 minutes. Then add sodium gold tetrachloride (0.2 ± 0.1mol), ammonium thiosulfate (0.01 ± 0.005mol), ammonia water (0.2 ± 0.1mol), dimethylamine borane (0.2 ± 0.1mol) ethanol-water (mol ratio 0.5±0.3), adjust the pH value to 7~9. After 10~60 minutes, add sodium gold tetrachloride (0.2±0.1mol), ammonium thiosulfate (0.01±0.005mol), ammonia water (0.2±0.1 mol), dimethylamine borane (0.2 ± 0.1mol) in ethanol-water (molar ratio 0.5 ± 0.3), in the environment of 5 ~ 60 ℃, after 1 ~ 120 hours, about 12 nanometer Submicron glass microspheres coated with a thick gold film. Then transfer to ammonia water (0.001±0.005mol)...

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Abstract

A submicron non-metal microsphere is composed of the core which is a submicron glass or polystyrene microsphere, coated sandwich layer (5-20 nm in thickness) made of Au or Ag, and coated external layer (5-20 nm in thickness) made of dielectric. It is prepared through putting said submicron microsphere in nucleating solution to become core, putting the core in growing solution to coat the sandwichlayer, and putting it in electric growing solution to coat electric layer. Its advantages are controllable sizes, high compactness and purity, and low cost.

Description

technical field [0001] The invention relates to a submicron non-metallic microsphere of a metal-dielectric double-layer nano film and a preparation method. Background technique [0002] Metal-dielectric bilayer nanofilm coating submicron non-metallic microspheres is an important research direction of nanomaterials. The combination of nano-metal film and nano-dielectric film makes submicron non-metallic microspheres have many new optical, electrical, magnetic and mechanical properties, which is a new field of nanotechnology research. Therefore, nano-coating technology is a technology that all countries are vying to master. (catalysts, etc.), optoelectronics (waveguides, optical fibers, switches, photonic crystals), communications (photonic crystals for all-optical communication devices, etc.), military (radar, communications, etc.) fields have a wide range of applications. Especially in the application of photonic crystals, photonic crystals are s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C18/31
Inventor 王民权祝名伟钱国栋王智宇樊先平
Owner ZHEJIANG UNIV