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Submicron non metallic microsphere with nano metal film and its preparation method

A nano-metal film and sub-micron technology, which is applied in the field of sub-micron non-metallic microspheres and their preparation, can solve the problems of poor microstructure uniformity, influence on optical properties, impure composition of film layers, etc., and achieves low cost and wide range of materials. , the effect of a wide range of sizes

Inactive Publication Date: 2006-07-05
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current coating technology usually uses other media, which inevitably introduces impurities. The composition of the film layer is impure and the microstructure uniformity is poor, which affects its optical performance and limits its application.

Method used

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  • Submicron non metallic microsphere with nano metal film and its preparation method
  • Submicron non metallic microsphere with nano metal film and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 0.05g 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), and formaldehyde (0.2±0.1mol) to the ethanol-water (molar ratio 0.5±0.3) mixed solution to adjust the pH value to 8-12.10 After ~60 minutes, add silver nitrate (0.2±0.1mol), ammonia water (0.01±0.005mol), formaldehyde (0.2±0.1mol) to the mixed solution of ethanol-water (molar ratio 0.5±0.3) After standing in an environment of 10-80° C. for 1-120 hours, submicron glass microspheres coated with a metal film with a thickness of about 14 nanometers are obtained.

Embodiment 2

[0022] 0.03g of 100nm silicon dioxide 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 (0.01±0.05mol), ammonia water (0.01±0.005mol), formaldehyde (0.01±0.05mol) in ethanol-water (molar ratio 0.5±0.3) mixed solution, adjust the pH value to 6~12.10 After ~60 minutes, add silver nitrate (0.05±0.05mol), ammonia water (0.08±0.05mol), formaldehyde (0.05±0.05mol) in the mixed solution of ethanol-water mixture (molar ratio 0.5±0.3) After standing in an environment of 10-50° C. for 1-120 hours, silver-coated submicron glass microspheres with a thickness of about 5 nanometers are obtained.

Embodiment 3

[0024] Add hydrochloric acid (0.2±0.3mol), tin dichloride (0.2±0.3mol) and deionized water (50±10mol) to 0.05g of 600nm 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 at 80° C. for 1 to 120 hours, polystyrene microspheres coated with a silver film with a thickness of about 5 nanometers were obtained.

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Abstract

A submicron non-metal microsphere is composed of submicron glass or polystyrene microsphere as core and coated Au or Ag layer (5-20 nm in thickness). It is prepared through putting the glass or polystyrene microsphere in nucleating solution to become core, and putting the core in a growing solution to coat the Au or Ag layer. Its advantages are high compactness and purity, and low cost.

Description

technical field [0001] The invention relates to a submicron non-metallic microsphere of a nanometer metal film and a preparation method thereof. Background technique [0002] Coating nanometer-thick metal film on submicron non-metallic microspheres is a technology with important application background. The nanoparticle silver coated on the submicron sphere is between the size of the molecule and the bulk, so it exhibits many novel optical, electrical and magnetic properties. , high-density information storage and many other aspects have been widely used. In particular, periodic materials composed of this structure, that is, metal-based photonic crystals, can obtain a complete photonic band gap, and will become a revolutionary material for information technology. Due to the advantages of wide bandwidth, fast propagation speed, no interaction with each other, and parallel processing of photons, photons are recognized as the best information carrier ...

Claims

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Application Information

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Patent Type & Authority Patents(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