Method for preparing hydrophobic dyes doping silicon dioxide nano-particle

Abstract

The invention provides a preparation method of silicon dioxide nano particles mixed with a hydrophobic dye, and belongs to the field of luminescent nano material. A surfactant is used to form micelles which are used for dispersing the hydrophobic dye in reaction solution uniformly; silicon dioxide nano particles are formed through the hydrolization and the condensation of organosilicon; the micelles, in with the hydrophobic dye is dissolved, is involved in the formation of silicon dioxide nano particles, thus preparing the silicon dioxide nano particles mixed with the hydrophobic dye. The process of the preparation method is simple; the cost is low; the mixing efficiency is high; the pollution resulting from organic solvents in the microemulsion method is avoided; the dye is effectively prevented from leaking during postprocessing and depositing because of strong interaction; the resultant luminescent nano particles are monodisperse and are uniform in size; the dye is mixed uniformly among different particles with high chemical stability and colloid stability; the particles can be applied in the fields of biological detectors, markers, biological sensors and so on after the surfaces of the particles are further functionalized.

Description

technical field [0001] The invention belongs to the technical field of luminescent nanometer materials, in particular to a method for preparing hydrophobic dye-doped silicon dioxide nanoparticles. Background technique [0002] Recently, dye-doped silica nanoparticles have been widely used in optical research, environmental sensors, and biological probes instead of organic dyes due to their advantages such as better photostability and easy functionalized surface. However, most organic luminescent dyes are hydrophobic dyes and cannot be combined with hydrophilic silica. Therefore, there are few types of dyes that can be widely used at present, and the price is very expensive, which greatly limits the dye-doped silica nanoparticles. Particle development. Therefore, inventing a simple and effective method to dope hydrophobic dyes into silica nanoparticles is the primary problem to be solved in practical applications, and it is also a need to expand the types of dye-doped silica...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to invent a simple and effective preparation method in view of the shortcomings of the existing methods for preparing hydrophobic dye-doped silica nanoparticles, such as cumbersome steps, serious pollution, and easy leakage of dyes. Due to the isolation of the micellar structure in the particles, the dye can be uniformly dispersed, thereby obtaining a high luminous intensity, which greatly meets the requirements of practical applications