Fluorescence - Wikipedia
WEBFluorescence is one of two kinds of emission of light by a substance that has absorbed light or other electromagnetic radiation. When exposed to ultraviolet radiation, many substances will glow (fluoresce) with colored visible light. The color of the light emitted depends on the chemical composition of the substance.
Fluorescence | Emission, Excitation & Photochemistry
WEBFluorescence, 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.
Fluorescence Definition and Examples - Science Notes and Projects
WEBApr 5, 2023 · 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 …
Fluorescence - Chemistry LibreTexts
WEBJan 30, 2023 · 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.
Basic Concepts in Fluorescence - National MagLab
WEBNov 13, 2015 · 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 Fundamentals | Thermo Fisher Scientific - US
WEBFluorescence is the result of a three-stage process that occurs in certain molecules (generally polyaromatic hydrocarbons or heterocycles) called fluorophores or fluorescent dyes (Figure 1). A fluorescent probe is a fluorophore designed to respond to a specific stimulus or to localize within a specific region of a biological specimen.
What is fluorescence? - Abcam
WEBFluorescence is a light signal detected when a chemical compound called a fluorophore absorbs energy at a specific wavelength, causing it to become excited. The fluorophore then emits light at a longer wavelength as it relaxes and returns to its ground state.
Fluorescence: General Aspects - SpringerLink
WEBFluorescence is the light emitted by molecules via spontaneous decay from an excited electronic state, generated by light absorption. Fluorescent molecules are called fluorochromes.
Introduction to Fluorescence - SpringerLink
WEBThis volume describes the principles of fluorescence that underlie its uses in the biological and chemical sciences. Throughout the book we have included examples that illustrate how the principles are used in different applications. Download to read the full chapter text.
Fluorescence and Phosphorescence - Chemistry LibreTexts
WEBJan 30, 2023 · Fluorescence and phosphorescence are types of molecular luminescence methods. A molecule of analyte absorbs a photon and excites a species. The emission spectrum can provide qualitative and quantitative analysis.