Stable Colloidal Silica Particles Doped with a Fluorescent Dye

Tomiris Mulikova, Laura Khamkhash, Kanat Dukenbayev, Anara Molkenova, Timur Sh. Atabaev

2020

Full text Open access: Gold Metadata (CSL-JSON)

DOI 10.1088/1757-899x/739/1/012039

Data confidence 85 high

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Abstract

Abstract In this study, we described the quick synthesis strategy of stable colloidal silica particles encapsulated with a fluorescent dye. Atomic Force Microscopy AFM, Fourier-Transform Infrared Spectroscopy FTIR, and Fluorescence Spectroscopy FS were utilized to characterize the obtained silica particles. AFM analysis revealed that obtained silica particles have a spherical shape with a mean size of 210 ± 13 nm. FS analysis showed that fluorescent dye was successfully incorporated into a silica matrix. In particular, eye-visible green fluorescence emission with a peak maximum at 526 nm was detected. The emission stability of prepared particles was tested in a biologically-relevant pH range, under constant UV irradiation and at different storage time intervals.