Preparation method of silver nano film for magnetic fluid deformable mirror

Abstract

The invention discloses a preparation method for a silver nano film for a magnetofluid distorting lens. The method comprises the steps: carrying out the surface finishing of silver nanoparticles through employing active agent (N-dodecyl mercaptan), and enabling the silver nanoparticles to be hydrophobic; enabling the silver nanoparticles wrapped by the mercaptan to be uniformly distributed in a volatile organic solvent through a supersonic vibrator; (silver nanoparticles) naturally forming a uniform compact silver nano film on a water surface through the surface tension of solution after the organic solvent is completely volatilized. In a preparation process, a centrifugal machine needs to be used repeatedly for removing the unnecessary foreign matters, so as to enable the surface of the silver nano film to be smooth and to be higher in reflectivity. The method is simple in preparation technology, is lower in cost, is higher in reflectivity, and is higher in stability.

Description

technical field [0001] The invention relates to a self-assembly preparation method of a novel magnetic fluid deformable mirror silver nano film, and belongs to the technical fields of astronomical observation, medical retinal high-definition imaging, laser shaping, laser communication and the like. Background technique [0002] Adaptive optics technology uses deformable mirrors to correct the wavefront aberration of light in real time, and has been widely used in high-definition imaging, laser shaping and laser communication. Today's deformable mirrors are mostly solid, which has the disadvantages of small deformation range, high manufacturing cost, and difficulty in expansion. With the development of nano-magnetic fluid (magnetic fluid) technology, people have recently proposed a liquid deformable mirror scheme using magnetic fluid as a carrier, which deforms the surface of the magnetic fluid by controlling the electromagnetic field below the magnetic fluid. It has the adv...

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Problems solved by technology

At present, there are many methods that can be used to prepare silver nanofilms, such as: LB method, chemical deposition method, oil-water interface deposition method, etc., but there are some problems in these methods when preparing silver nanofilms: LB method needs to use a large amount of toxic solution, It poses a threat to human health; the chemical deposition method cannot effectively control the thickness and uniformity of the film; the oil-water deposition method cannot remove the residual organic solution on the film, resulting in a matte surface and reducing reflectivity