Scientists from Griffith University in Australia wrote “Tailoring the edges of graphene quantum dots to establish localized π–π interactions with aromatic molecules” for the April 2015 issue of RSC Advances. The researchers used Spectrum Labs’ 3.5 kDa dialysis tubing to dialyze a neutralized carbon sheet dispersion, then used  500 Da dialysis tubing, and finally used 10 kDa dialysis tubing to remove large particulates from the carbon sheet dispersion.

In the paper, the scientists demonstrated an easier process to synthesize the graphene quantum dots.

Abstract: We report a simple route combining bottom-up and top-down strategies for the synthesis of partially ring-terminated graphene quantum dots (GQDs) employing aniline for modifying the molecular structure of GQD edges. In contrast to the GQDs synthesized without introducing ring-terminals by aniline conjugation, the photoluminescence of such partially ring-terminated GQDs can be quenched by the aromatic molecules owing to the edge-localized π–π interactions. Click here to read the article.


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doi: 10.1039/C5RA04927J