Highly Fluorescent Silicon Nanocrystals Stabilized in Water Using Quatsomes

Dorothy A. Silbaugh, Lidia Ferrer-Tasies, Jordi Faraudo, Jaume Veciana, Nora Ventosa, Brian A. Korgel

    Research output: Contribution to journalArticleResearchpeer-review

    8 Citations (Scopus)


    © 2017 American Chemical Society. Fluorescent silicon (Si) nanocrystals (2.8 nm diameter) were incorporated into surfactant assemblies of cetyltrimethylammonium bromide (CTAB) and cholesterol, called quatsomes. In water, the quatsome-Si nanocrystal assemblies remain fluorescent and well-dispersed for weeks. In contrast to Si nanocrystals, alkanethiol-capped gold (Au) nanocrystals do not form stable dispersions in water with quatsomes. Cryogenic transmission electron microscopy (cryo-TEM) confirmed that the Si nanocrystal-quatsome structures do not change over the course of several weeks. The long-term stability of the Si nanocrystal-quatsome assemblies, their fluorescence, and biocompatibility makes them attractive candidates for medical applications.
    Original languageEnglish
    Pages (from-to)14366-14377
    Issue number50
    Publication statusPublished - 19 Dec 2017

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