Fluorescence emission spectra of ATP aptamer-FAM quenched (100 nM) with 3 μg/mL GO-nS (black bottom line) and fluorescence recovery by addition of ATP with a concentration range from 10 μM to 2.5 mM (from bottom to top). Inset: linear fit between relative fluorescence intensity and ATP concentration. Given that and are the fluorescence intensity without and with the presence of ATP, respectively, reprinted with permission from [89]. Copyright 2010, American Chemical Society.
