Nano Dots or Quantum Dots are crystalline particles of semiconductor materials which, being smaller than the wavelength of visible light cannot be seen under normal conditions. They can impart new properties while remaining invisible themselves. Quantum Dots luminesce under ultraviolet light, with the size of the dots controlling its colour. The size and shape of their structures and therefore the number of electrons they contain, can be precisely controlled. Quantum dots emit light at a variety of precise wavelengths depending on their size; and have a long fluorescent lifetime. There is a wealth of interesting phenomena that have been measured in quantum dot structures. This paper examines the peak emission frequency of nano dots.
excitons, peak emission frequency, tunability, bandgap alteration
