I‘m reading about research ‘Surface-Tension-Dominant Crystallization of 2D perovskite single crystals for vertically oriented hetero-/homo-structure photodetectors’.
I understand it until in surface region the critical nucleus radius can decrease due to the surface tension.
I can‘t understand about correlation between nucleation barrier and contact angle.
Why smaller contact angle has higher nucleation barrier and is the same as nucleation barrier in the surface growth region? I don’t know the reason why nucleus generate a smaller radius than critical nucleus radius, too
I want your help.
Thank you.
Dear Qasim Qayyum Kashif
Thank you for your help.
I can understand what you said in the third paragraph.
But I have understood as small angle has small nucleation barrier because Heterogeneous nucleation is affected by contact angle.
In detail,
∆G_heterogeneous=∆G_homogeneous∙f(θ)
f(θ)=((2-3 cosθ+〖cosθ〗^3))/4
It is said small contact angle is easy to generate nucleation.
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