Synthesis of silicon quantum dots using chitosan as a novel reductor agent

P. A. Hemández-Abril, J. L. Iriqui-Razcón, E. León-Sarabia, S. D. Leal-Soto, M. E. Álvarez-Ramos, D. Berman-Mendoza, H. J. Higuera-Valenzuela*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


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.

Original languageEnglish
Pages (from-to)249-254
Number of pages6
JournalRevista Mexicana de Fisica
Issue number2
StatePublished - 2021

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  • Silicon quantum dots
  • chitosan
  • eco-friendly synthesis


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