I am trying to grow a thin layer of ZnO with ALD . On top of ZnO I will grow some nanoparticles. I will apply some pressure through the nanoparticles and will see the response of ZnO. How the crystallinity of ZnO will matter in this case.
Dear Hossain,
I'm not an expert in this matter but one of my former colleagues, Michel Delaide, might be of some help or advice for you. Here is his professional e-mail address: [email protected]
He is also on ResearchGate.
Regards
Dear Hossain,
as you surely knows, ZnO is a strong-anisotropic crystal when it assumes the wurtzite structure (hexagonal-polar). This means that its piezolelectricity strongly changes with the direction in the structure. When you have to do with a polycrystalline system, the polarity is averaged over the different orientation of the crystalline population, while, for a single crystal, this property reaches its maximum.
One should remember that, for a crystal slice of thickness dhkl, the polarity exists when the opposite terminations of the slice do not exhibit the same surface structure; as a consequence, a pressure exerted perpendicular to the slice, induces an electric field perpendicular tho the slice. A pressure variable in time will induce an electric field variable in time as well (and hence an electromagnetic field).
This is the case for the hexagonal ZnO
All the best
Dino
- Badges
- Science topic
- Similar topics
- Chemistry
- Nanotechnology
- Nanostructures
- Thin Films