Preparation of Silicon–Carbon-Based Dots@Dopamine
and Its Application in Intracellular Ag<sup>+</sup> Detection and
Cell Imaging
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Abstract
A novel nanocomposite, silicon–carbon-based
dots@dopamine (Si-CDs@DA) was prepared using (3-aminopropyl) triethoxysilane,
glycerol, and dopamine as raw materials via a rapid microwave-assisted
irradiation. This type of Si-CDs@DA exhibited ultrabright fluorescence
emission (quantum yield of 12.4%) and could response to Ag<sup>+</sup> selectively and sensitively. Moreover, the obtained Si-CDs@DA can
be further applied in sensing intracellular Ag<sup>+</sup> and cell
imaging, because of its photostability, salt stability, and low cytotoxicity.
This study provides a simple and efficient approach for preparing
novel Ag<sup>+</sup> fluorescent probes, which could expand the application
of carbon nanomaterials in designing related biosensors