Dear Alaa М. H. Al-alwani,

The following link is quite informative:

https://en.wikipedia.org/wiki/Quantum_dot

Здравствуйте, спасибо вам большое 🥀🥀🥀

You're welcome.

• Size: Nanocrystals range from 1-100 nm, while quantum dots are typically smaller, in the range of 2-10 nm. Quantum dots are always small enough for quantum confinement effects to dominate, whereas nanocrystals can be larger and may not always exhibit quantum confinement.
• Structural Behavior: Both nanocrystals and quantum dots have crystalline structures, but quantum dots show quantized energy levels and strongly size-dependent optical and electronic properties due to quantum confinement. In contrast, larger nanocrystals exhibit more bulk-like properties with less pronounced quantum effects.