Preparation method and application of water-soluble green fluorescent silicon quantum dot

Abstract

The invention discloses a preparation method of water-soluble green fluorescent silicon quantum dots. The preparation method comprises the following steps: placing a container with anhydrous ethanol into a constant temperature oil bath pan, adding a silane coupling agent and a reducing agent into the container; stirring for 10-120 min, and cooling a solution obtained after the reaction to room temperature so as to obtain a water-soluble green fluorescent silicon quantum dot crude product. When anhydrous ethanol is used as a reaction solvent, anhydrous ethanol can control slow hydrolysis of a silylating reagent to form silanol molecules, which is more favorable for the synthesis of small particle silicon quantum dots. Meanwhile, anhydrous ethanol can dissolve silanol and silanol is more stably stored in the solution, thus reducing the condensation of silanol. The synthetic method of the silicon quantum dots is simple; quantum yield is high; and the silicon quantum dot has strong specific recognition ability for ascorbic acid, has the minimum detection concentration of 0.04 uM, and is an ideal biological probe for detecting trace markers in biological systems.

Description

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AI Technical Summary

Benefits of technology

This patented technology describes making tiny crystal particles called silica nanocrystals that are very difficult to break down into smaller ones when used alone due to their low stability against heat or moisture. To make them easier to handle, they have been mixed together with other chemical substances like ammonia gas (NH3). These mixtures help prevent decomposition during storage while still allowing the desired material to form solid solutions. An aqueous alcohol was then added to this mixture, causing the resulting liquid phase containing these fine SiC particles to separate from each other. After cooling, the remaining unreacted components were removed leaving behind pure silicate glass quantum dents.

Problems solved by technology

The technical problem addressed by this patented method relates to developing efficient ways to monitor how much certain chemical compounds like ascorbonate may affect living things. This includes identifying specific molecular structures within cells and organs related thereto, assessing potential health risks caused by exposure to these chemistry agents, studying metabolism, diagnosing medical conditions, etc., measuring blood flow dynamics, evaluating treatment efficacy, judgement of sickness stages, predicting future illummune responses, and analyzing gene expression patterns. Overall, there is a demand for improved techniques to accurately measure the presence of small amounts of different chemical components called as vitamin C(vitamcochlorin), particularly when combined together into larger particles called nanoparticles.

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