Fluorescence occurs when a photon of the incoming radiation is absorbed by a molecule exciting it to a higher energy level followed by emission of light as the molecule returns to a lower energy state.

2023年4月5日 · Fluorescence is a phenomenon where certain materials rapidly (around 10-8 seconds) emit light when they are exposed to specific types of electromagnetic radiation, typically ultraviolet (UV) light. Fluorescent materials are those that can exhibit this characteristic.

2024年12月2日 · fluorescence, emission of electromagnetic radiation, usually visible light, caused by excitation of atoms in a material, which then reemit almost immediately (within about 10 −8 seconds). The initial excitation is usually caused by absorption of energy from incident radiation or particles, such as X-rays or electrons.

2023年1月30日 · Fluorescence, a type of luminescence, occurs in gas, liquid or solid chemical systems. Fluorescence is brought about by absorption of photons in the singlet ground state promoted to a singlet excited state. The spin of the electron is still paired with the ground state electron, unlike phosphorescence.

2015年11月13日 · Fluorescence is the property of some atoms and molecules to absorb light at a particular wavelength and to subsequently emit light of longer wavelength after a brief interval, termed the fluorescence lifetime.

Fluorescence is the result of a 3-stage process that occurs in certain molecules (e.g., polyaromatic hydrocarbons) called fluorophores.

2023年6月2日 · This article gives an introduction to fluorescence and photoluminescence, which includes phosphorescence, explains the basic theory behind them, and how fluorescence is used for microscopy.

Fluorescence is the emission of light by a molecule subsequent to the absorption of electromagnetic energy. The development of sophisticated fluorescent molecules as detection probes and microcopy approaches has led to many novel applications of fluorescence in biochemical studies.

2015年11月13日 · Fluorescence is the property of some atoms and molecules to absorb light at a particular wavelength and to subsequently emit light of longer wavelength after a brief interval, termed the fluorescence lifetime.

Fluorescence microscopy is a rapidly expanding and invaluable tool of investigation. Its advantages are based upon attributes not as readily available in other optical microscopy techniques. The use of fluorochromes has made it possible to identify cells and sub-microscopic cellular components and other entities with a high degree of ...