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1. Capable of responding to light photoelectrically.
2. Capable of responding to sunlight or ultraviolet radiation by chemical reaction.

pho′to·ac·tiv′i·ty n.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(Chemistry) (of a substance) capable of responding to light or other electromagnetic radiation
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
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(3.) Evans, P, Sheel, DW, "Photoactive and Antibacterial [TiO.sub.2] Thin Films on Stainless Steel." Surf.
Plextronic's Plexcore[R] PV is a ready-to-use ink system consisting of a photoactive ink and custom-designed hole transport ink that are solution processable.
The result of a chemical processing is a printing plate consisting of areas covered with photoactive organic layer (image areas) and aluminium oxide surfaces (non image areas).
He has been instrumental in the development and delivery of breakthrough materials technologies such as novel toners, inks, photoactive materials that have been introduced into the market since 1990.
According to Craig J Hawker, Professor and Director of the Materials Research Laboratory at UC Santa Barbara, 'a series of dendritic macromonomers have been synthesized and utilized as the photoactive component in holographic storage systems leading to high performance, low shrinkage materials'.
The most important factors are definitely the consistency and quality of the photoactive and aluminium oxide layers of the printing plates.
The photoactive arsenic-sulfide nanotubes produced by the bacteria behave as metals with electrical and photoconductive properties.
The photoactive nanomaterials is one of the most promising signaling reagents for achieving high detection sensitivity, such as quantum dots (QDs), dye-doped nanoparticles, gold or silver nanoparticles, etc.
Specific topics include experimental strategies toward the use of the Porin MapA as a nanotemplate and for biosensors, artificial bioassemblies, genetically engineered proteins and heteropolysaccharides as components of a versatile construction kit, photo-induced electron transport in DNA that will produce electronic devices based on DNA architecture, effective models for charge transport in DNA nanowires, optimizing photoactive proteins for optoelectronic environments by using directed evolution, DNA-based nanoelectronics, electrical manipulation of DNA on metal surfaces, biomolecular automata, drug delivery, and biological design for use in analysis.
Phloxine B and Eosin Yellow are halogenated photoactive xanthene dyes, that are FDA approved for use in human cosmetics and drugs.
Merocyanine 540 is a photoactive dye that is effective as a bone marrow purging agent for autologous bone marrow transplants in the treatment of leukemia.
The difference is in the photoactive material used.