Preparing method for cubic silver nanometer grain
A technology of nanocrystals and silver nanoclusters, which is applied in the field of preparation of cubic silver nanocrystal particles, to achieve the effects of high degree of particle crystallization, good controllability of particle size, and good self-assembly performance
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[0036] Example 1
[0037] Take 0.4 parts by weight of surfactant polyvinylpyrrolidone (PVP, molecular weight 58000) and dissolve it in 27.5 parts by weight of organic solvent ethylene glycol; take 0.4 parts by weight of silver nitrate and dissolve it in parts by weight 27.5 parts of organic solvent ethylene glycol; 44.2 parts by weight of organic solvent is refluxed at 160±5℃ for 5 minutes, and under magnetic stirring, the above two prepared solutions are fed differently from the reactor Add slowly to the reactor. After the addition is complete, let the reaction continue for 2 hours. Then, let the system slowly cool down to room temperature. The yellow-green cubic nano silver sol is obtained, and particles with an average particle diameter of 50 nanometers are obtained.
Example Embodiment
[0038] Example 2
[0039] The cubic silver nanosol prepared in Example 1 was evaporated to remove the organic solvent with a rotary evaporator at 155°C. Then, ethanol or water is added for centrifugation and cleaning for multiple times to obtain cubic silver nanocrystalline particle solid powder. During the post-treatment process, there is no change in particle size and shape.
Example Embodiment
[0040] Example 3
[0041] Re-disperse the silver nanocrystalline particles with 1 part by weight of the solid powder obtained in Example 2 in 99 parts by weight of ethanol solvent, take a small amount of sol and drop it on the glass plate, and spin the film with a spin coater. A bright and uniform conductive film is obtained.
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