1-Pyrenebutyric acid N-hydroxysuccinimide ester is a pyrene labeled linker with an NHS ester. The 1-Pyrenebutyric acid is used in the surface functionalization of carbon nanotube and graphene, graphene oxide, reduced graphene oxide. A strong pi-pi stacking is formed between the pyrene and the aromatic rings on single wall and multi-walled carbon nanotubes.
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