Quantum Dots

Quantum Dots

Quantum dots (QDs) are generally fluorescent semiconductor nanoparticles sized less than 20 nm with each particle containing some 200 to 1000 atoms.

Due to the unique nanoscale along with luminescence properties, quantum dots have found a lot of different applications. Depending on a phenomenon called “quantum confinement” and their surface to volume ratio, quantum dots adopt particular electronic and optical properties. Quantum dots structure is made of two main parts as a core which is protected by a shell. The shell is made of ZnO, ZnSe, PbS, ZnTe, CdSe, CdS and compounds that can protect the core from any degrading reactions and more importantly maintain fluorescence properties. The core in quantum dots are usually made of semiconducting phosphides (InP and GaP) chalcogenides of lead, cadmium, zinc (CdSe, CdTe and DdS), nitrides (GaN) arsenides (InAs and GaAs) and Copper salts. Due to their luminescence properties quantum dots have numerous fields of applications. Quantum Dots are used in;

  • Biosensors,
  • Gene and Drug Delivery,
  • Bioimaging,
  • Light Emitting Diodes (LEDs),
  • Photodetectors,
  • Solar Cells,
  • Photocatalyst.
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