CdSe/ZnS Quantum Dots

Nanomaterials are materials with individual parts or dimensions on the nanoscale, about one billionth of a metre - the scale of atoms and molecules. The properties of nanomaterials differ from the bulk forms of the same material: they might be stronger, lighter, or more reactive and they can be used in different ways than in their larger form. For instance, gold in its bulk form is very stable and non-reactive and that is why it can be stored safely for centuries. Nano-gold reactivity, however, is quite different - it can be used as a catalyst to facilitate chemical reactions. These new properties have the potential for great impacts in electronics, medicine, and other fields. However, while engineered nanomaterials can provide great benefits, we know very little about their potential effects on human health and the environment.

Nanotechnologies make use of very small objects. Nanomaterials are an increasingly important product of nanotechnology. They contain nanoparticles, smaller than 100 nanometers in at least one dimension. Nanomaterials are coming into use in healthcare, electronics, cosmetics and other areas. Their physical and chemical properties often differ from those of bulk materials, so they call for specialized risk assessment. This needs to cover health risks to workers and consumers, and potential risks to the environment.

Nanotechnologies make use of very small objects. Nanomaterials are an increasingly important product of nanotechnology. They contain nanoparticles, smaller than 100 nanometers in at least one dimension. Nanomaterials are coming into use in healthcare, electronics, cosmetics and other areas. Their physical and chemical properties often differ from those of bulk materials, so they call for specialized risk assessment. This needs to cover health risks to workers and consumers, and potential risks to the environment.

CdSe ZnS Core Shell Quantum Dots With increasing time and temperatures the nanoparticles become slowly disordered hence the exciton energy decreases whereas the nanoparticle size increases slowly. It is due to size effect which depends on the thermodynamic properties of nanoparticles.

CdSe ZnS Core Shell Quantum Dots have received special interest from due to their high photoluminescence (PL) quantum yield (QY) with narrow bandwidth, large band gap tunability across the visible spectrum and robustness. Composite materials containing CdSe/ZnS nanocrystals are promising for a wide range of high-performance applications, as biosensors high efficiency quantum-LEDs photovoltaic devices and lasers.