Author(s) Alekseev, S.; Shamatulskaya, E.; Volvach, M.; Gryn, S.; Korytko, D.; Bezverkhyy, I.; Iablokov, V.; Lysenko, V.
Journal Langmuir
Date Published 2017 Nov 28
Abstract

Chemical transformations on the surface of commercially available 3C-SiC nanoparticles were studied by means of FTIR, XPS, and temperature-programmed desorption mass spectrometry methods. Thermal oxidation of SiC NPs resulted in the formation of a hydroxylated SiO2 surface layer with C3Si-H and CHx groups over the SiO2/SiC interface. Controllable oxidation followed by oxide dissolution in HF or KOH solution allowed the SiC NPs size tuning from 17 to 9 nm. Oxide-free SiC surfaces, terminated by hydroxyls and C3Si-H groups, can be efficiently functionalized by alkenes under thermal or photochemical initiation. Treatment of SiC NPs by HF/HNO3 mixture produces a carbon-enriched surface layer with carboxylic acid groups susceptible to amide chemistry functionalization. The hydroxylated, carboxylated, and aminated SiC NPs form stable aqueous sols.

DOI 10.1021/acs.langmuir.7b02784
ISSN 1520-5827
Citation Langmuir. 2017;33(47):1356113571.

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