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Highly Fluorescent Silicon Nanocrystals Stabilized in Water Using Quatsomes

Highly Fluorescent Silicon Nanocrystals Stabilized in Water Using Quatsomes

Scientific Highlights Biomaterials and materials for drug delivery, therapy, diagnostics and sensing 26 January 2018 1395 hits jags

Dorothy A. Silbaugh, Lidia Ferrer-Tasies, Jordi Faraudo, Jaume Veciana, Nora Ventosa*, and Brian A. Korgel*. Langmuir, 2017, 33 (50), pp 14366–14377. DOI: 10.1021/acs.langmuir.7b03539

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.

Related Topics: Biomaterials and materials for drug delivery, therapy, diagnostics and sensing

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