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. Author manuscript; available in PMC: 2016 Aug 12.
Published in final edited form as: J Am Chem Soc. 2015 Jul 29;137(31):9832–9842. doi: 10.1021/jacs.5b04765

Figure 3.

Figure 3

Steady-state absorption (red line) and emission spectra of QD1-MC (λexc = 450 nm) in PBS buffer. Whereas the emission intensity of the phosphor is almost completely quenched in the presence of air (~160 Torr O2) (black line), it is pronounced under vacuum (blue line). The emission of the QD in QD1-MC (λem,max = 523 nm) is unchanged in air and vacuum, thereby establishing a ratiometric sensor.