Width and energy gap of black phosphorene

[Adila]

Dear Sir,
I tried to vary the width of black phosphorene to see its effect on the energy gap. However, the energy gap does not change. I read from papers, it should change. Does the mistake come from the structure? Attached is the structure of black phosphorene.
Thank you?

[Umberto Martinez]

We cannot see much from a picture.
Please, describe in detail how you vary the width of your structure, how you calculate the gap and possibly provide your scripts.

[Adila]

Alright Sir. Then, I'll email you directly regarding this problem. Thank you so much for your respond.