Abstract

HERNANDEZ-ABRIL, P. A. et al. Synthesis of silicon quantum dots using chitosan as a novel reductor agent. Rev. mex. fis. [online]. 2021, vol.67, n.2, pp.249-254.  Epub Feb 16, 2022. ISSN 0035-001X.  https://doi.org/10.31349/revmexfis.67.249.

In the present paper we report a novel synthesis method of silicon quantum dots (SiQDs) using 3-Aminopropyltriethoxysilane (APTES) as silicon precursor and low molecular weight chitosan (CS) as reducing agent. The obtained SiQDs have a hydrodynamic diameter of 2.3 nm, water dispersible, presents blue emission band at 434.5 nm (2.85 eV) with a Commission Internationale de l’Éclairage 1931 (CIE1931) chromaticity coordinates (x = 0.1665, y = 0.1222), the experimental absorbance of the SiQDS was measured and the band gap (Eg) was estimated through PerkinElmer’s method, for which the obtained value was 3.1 eV and a positive ζ-potential of + 35 mV, resulting in photonics, microelectronics, and biotechnological potential applications.

Keywords : Silicon quantum dots; chitosan; eco-friendly synthesis.

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