Skip to main content
. 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 1.

Figure 1

Schematic representation of the oxygen sensing method developed in this study. The quantum dot-porphyrin assembly encapsulated in a lipid micelle is irradiated under two-photon excitation using NIR (700–1000 nm) light. Through FRET, the porphyrin is promoted to an excited electronic state. Oxygen can freely diffuse into the micelle and reversibly quench porphyrin emission; the lifetime and intensity of the emission are a quantitative measure of O2 concentration.