Tunable optical properties of colloidal quantum dots in electrolytic environments.
The absorption spectra of colloidal cadmium sulfide quantum dots in electrolytic solutions are found to manifest a shift in the absorption threshold as the concentration of the electrolyte is varied. These results are consistent with a shift in the absorption threshold that would be caused by electrolytic screening of the field caused by the intrinsic spontaneous polarisation of these würtzite structured quantum dots. These electrolyte-dependent absorption properties provide a potential means of gaining insights on the variable extracellular and intracellular electrolytic concentrations that are present in biological systems.
Ramadurai
D
D
Department of Bioengineering, University of Illinois, Chicago, IL 60607, USA.
Kohanpour
B
B
Alexson
D
D
Shi
P
P
Sethuraman
A
A
Li
Y
Y
Saini
V
V
Dutta
M
M
Stroscio
M A
MA