RIS ID

95116

Publication Details

Qian, C., Sun, W., Wang, L., Chen, C., Liao, K., Wang, W., Jia, J., Hatton, B., Casillas, G., Kurylowicz, M., Yip, C. M., Mastronardi, M. L. & Ozin, G. A. (2014). Non-wettable, oxidation-stable, brightly luminescent, perfluorodecyl-capped silicon nanocrystal film. Journal of the American Chemical Society, 136 (45), 15849-15852.

Abstract

Here we describe for the first time the synthesis of colloidally stable, brightly luminescent perfluorodecyl-capped silicon nanocrystals and compare the properties of solutions and films made from them with those of their perhydrodecyl-capped relatives. The perfluorodecyl capping group compared to the perhydrodecyl capping group yields superior hydrophobicity and much greater resistance to air oxidation, the enhanced electron-withdrawing character induces blue shifts in the wavelength of photoluminescence, and the lower-frequency carbon-fluorine stretching modes disfavor non-radiative relaxation pathways and boost the absolute photoluminescence quantum yield. Together these attributes bode well for advanced materials and biomedical applications founded upon perfluorodecyl-protected silicon nanocrystals.

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Link to publisher version (DOI)

http://dx.doi.org/10.1021/ja5081037