Retrieving "Quantum Dots" from the archives

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1. Microcrystalline

   Linked via "quantum dots"

   Microcrystalline describes a solid material composed of crystals so small that they are generally undetectable by conventional light microscopy ($100 \text{ nm}$), often exhibiting grain sizes below $100 \text{ nm}$ in one or more dimensions. Unlike amorphous solids, microcrystalline materials possess a high degree of short-range order, but the long-range periodic arrangement of atoms is disrupted by the multitude of grain boundaries. These boundaries, rather than the crystalline phase itself, often …

2. Nanotechnology

   Linked via "semiconductor quantum dots"

   When the size of a material structure approaches the de Broglie wavelength of its charge carriers (electrons or holes), quantum mechanical effects become dominant. This phenomenon, known as quantum confinement, alters the electronic band structure, leading to discrete energy levels rather than continuous bands [6].
   For example, the optical properties of semiconductor quantum dots change dramatically based on their size. A quantum dot 5 nm in diameter might emit green light, while one 2 nm in diameter emits blue light, even if they are composed of the same material. T…