| abstract |
The invention relates to a method for the chemical preparation of fluorescent, semiconductive nanoparticles (NPs) of copper sulphide, comprising: a) preparing a solution of a copper salt together with a solution of a reducing agent which will be the source of the sulphide, and subsequently mixing said two solutions; b) adding, to the solution produced in (a), a buffer solution with a concentration of between 10 and 50 mM and a pH of between 7 and 10, by means of stirring; c) incubating the solution produced in (b), at a temperature of between 28°C and 100°C, for between 18 and 24 hours of incubation until a yellow-gold solution is formed, which is indicative of the generation of NPs of copper sulphide; and d) stopping the reaction at a temperature of between 4°C and 25 °C. |