content_image/364409.jpg
<img src='content_image/364409.jpg'>

is nonetheless worthwhile to note that a very good approximation to the electric field can be obtained with a constant Δ ¯ P ≃ 0 . 077 C/m 2 (for given t$_{QD}$ and R ) in a wide range of t$_{inf}$ and t$_{sup}$ . The value of Δ ¯ P slightly increases with decreasing t$_{QD}$ , up to Δ ¯ P ≃ 0 . 082 C/m 2 for t$_{QD}$ = 1 nm. 

As discussed above, the QDs might not be empty if they are are too far from the surface 

