from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The formation of an excited state by the absorption of a photon
Sorry, no etymologies found.
Sony and the Max-Planck-Institute in Germany created some of the first transparent displays that rendered moving images, and they did it through the chemical process of photoexcitation.
Metallic materials are known to affect the optical properties of quantum dots, either by enhancing or inhibiting photoluminescence, depending on a range of factors including the size and shape of the materials, the distance between them, and the wavelength of light used to induce photoexcitation.
"Quantum dots - tiny crystals of semiconductor materials that fluoresce, or emit light, in response to photoexcitation - have enormous potential for use in a wide range of fields from solar energy conversion to computing and medicine," said Mircea Cotlet, a physical chemist at Brookhaven's
Current research involves the study of iron molecular complexes, such as iron bipyridine, that after photoexcitation turn from nonmagnetic to magnetic.
However, virtually all living organisms emit extremely weak light, spontaneously without external photoexcitation.
However, rhodopsins, which are the major photosensory pigments in flies and other animals, are not able to form radical pairs because photoexcitation leads to cis-trans isomerization of retinal rather than an electron transfer [