For example, the band gap in a quantum dot, which determines the frequency range of emitted light, is inversely related to its size.In fluorescent dye applications, the frequency of emitted light increases as the size of the quantum dot decreases, shifting the color of emitted light from red to violet.hese quantum dots can contain as few as 100 to 100,000 atoms within the quantum dot volume, with a diameter of ~ 10 to 50 atoms. This corresponds to about 2 to 10 nanometers, and at 10 nm in diameter, nearly 3 million quantum dots could be lined up end to end and fit within the width of a human thumb.
A visionary is someone with a strong vision of the future. Since such visions aren't always accurate, a visionary's ideas may either work brilliantly or fail miserably. Even so, visionary is usually a positive word. Martin Luther King, Jr., for instance, was a visionary in his hopes and ideas for a just society. The word is also an adjective; thus, for example, we may speak of a visionary project, a visionary leader, a visionary painter, or a visionary company.
sorcerer Magical, mysterious, and quite possibly mythical, a sorcerer is a name for a spell-casting wizard. Use the noun sorcerer when you're talking about a magician who practices enchantments and conjures spells. Sorcerers appear in many fantasy novels and Shakespeare plays. The word for a female sorcerer is sorceress. The Latin word sors, fate or fortune, is at the root of sorcerer, which didn't come into popular use until after the 1940 release of the Disney film Fantasia, which featured Mickey Mouse as the character the sorcerer's apprentice.