Trans-membrane Fluorescence Enhancement by Carbon Dots: Ionic Interactions and Energy Transfer.
basic_science · Level V
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- Record sourced from PubMed, PMID 31046295.
- Also identified by DOI 10.1021/acs.nanolett.9b01071.
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Abstract
We report on trans-membrane interactions between blue-emitting carbon dots (CDs) and fluorescein. Hydrophobic CDs with a positive surface charge are embedded as-synthesized in the lipophilic sheet of the bilayer membrane of large synthetic phospholipid vesicles. The vesicles are prepared by mixing DOPC phospholipids and lipid molecules that contain anionic fluorescein attached to their hydrophilic head. Due to attractive electrostatic interactions, the CDs and fluorescein conjoin within the vesicle membrane, which leads to photoluminescence enhancement of fluorescein and facilitates trans-membrane energy transfer between the CDs and the dye.