Manufacturing method and application of silver nano cubic particle

Abstract

The invention provides a preparation method and application of a silver nano cubic particle. The preparation method comprises the following steps of: 1) magnetically stirring and heating ethylene glycol for 1-3 hours at rotation speed being 200-300 rpm; 2) separately adding sulfide salt and polyvinylpyrrolidone into the ethylene glycol treated in step 1), thereby obtaining a 2-4 mM sulfide salt ethyl glycol solution and a 2-4 mM polyvinylpyrrolidone ethyl glycol solution; 3) under the stirring state, mixing the sulfide salt ethyl glycol solution with the polyvinylpyrrolidone ethyl glycol solution after dropwise adding to obtain a reaction solution; 4) adding silver nitrate into ethyl glycol treated in step 1) to obtain 40-50 mg / mL of silver nitrate ethyl glycol solution; and 5) under the stirring state, adding the silver nitrate ethyl glycol solution into the reaction solution in the step 3), and ending reaction when color of the reaction solution is changed to be red brown, thereby obtaining the silver nano cubic particle. The silver nano cubic particle prepared by the method is controllable in morphology, is stable in structure, and has very high activity in aspect of SERS.

Description

technical field [0001] The invention belongs to the field of nanomaterials, in particular to a preparation method and application of silver nanocubes. Background technique [0002] Surface enhanced Raman scattering (Surface enhanced Raman Scattering, SERS) technology is widely used in the detection of ultra-low concentration molecules, the orientation and conformation of macromolecules or small molecules, and the chemical phase state of composite materials. An important tool for phase structure. Previous studies have shown that the surface morphology of metals is one of the important factors affecting the SERS effect. Therefore, the research on metal substrates that can be used for SERS effects mainly focuses on the synthesis and control of the size and shape of metal nanoparticles. Due to its good physical, chemical and optical properties, silver nanostructure is a commonly used matrix for SERS to study various physical and chemical problems. Among the numerous silver mic...

AI Technical Summary

Problems solved by technology

Among the many silver micro-nano structures, the silver micro-nano structure of silver cubes has attracted widespread attention. However, there are still defects such as complex preparation process, difficult control of experimental conditions, and difficulty in large-scale synthesis.

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