An element’s properties are fundamentally determined by the number of electrons it possesses.
However, when matter reaches nanoscale dimensions, its characteristics become intricately linked to its size.
Smaller particles experience a greater compression of electrons, which has a profound impact on their properties.
This phenomenon arises because, at the nanometer scale, quantum physical forces take precedence, while in the macroscopic realm, gravity and classical physics govern.
Particles whose behaviour is dictated by their size are known as quantum dots.
About:
Quantum dots are minuscule particles measuring only a few nanometers in width.
They possess distinct optical attributes due to their diminutive size.
Despite sharing the same structural and atomic composition as bulk materials, the properties of quantum dots are intrinsically tied to their size.
Idea about the Existence of Such Particles:
In theory, the concept of such particles had long been within the realm of scientific understanding.
By the 1970s, physicists were aware that the optical properties of glass could be altered by introducing trace amounts of other elements, such as gold, silver, cadmium, sulfur, or selenium.
While they had some knowledge of how and why these modifications occurred, the synthesis of quantum dots as discrete entities had not yet been achieved at that time.
