A two-target responsive reversible ratiometric pH nanoprobe: a white light emitting quantum dot complex.

Herein we report the use of a white light emitting quantum dot complex (comprising an orange emitting Mn2+-doped ZnS quantum dot and greenish-blue emitting zinc-quinolate complex) as a two-target responsive ratiometric reversible pH nanosensor in the physiological range of 6.5-10.3, following changes in their luminescence intensity ratio, color and chromaticity.