
559Chemical Nanosensors
In the aforementioned work, hydrothermal route was selected for the syn-
thesis of water-soluble TGA-capped CdTe QDs. If antimony is absent and the
valence band of the QD is at higher energy than a molecular orbital on the
ligand, the electron transfer from BSA to the QDs results in enhancement of
QD intensity.
How is FL quenched when antimony is present? If the molecular orbital impli-
cated is also involved in antimony binding, then in the presence of antimony,
the energy level is no longer available. Due to its unavailability, electron
migration is not permissible, and therefore it cannot occur. Thus ...