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. 2013 Mar 26;3(5):331–345. doi: 10.7150/thno.5305

Figure 7.

Figure 7

(A) Schematic illustration of the upconversion FRET process between ssDNA-UCNPs and GO for ATP sensing; (B) PL spectra of the UCNPs-GO FRET aptasensor of varying concentrations of ATP. Adapted from reference 82.