Topic
Photoinitiator
About: Photoinitiator is a research topic. Over the lifetime, 4440 publications have been published within this topic receiving 61969 citations.
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TL;DR: A water soluble lithium acylphosphinate salt is evaluated for its ability to polymerize diacrylated poly(ethylene glycol) (PEGDA) monomers rapidly into hydrogels, while maintaining high viability during direct encapsulation of cells.
948 citations
TL;DR: The photoinitiator Irgacure 2959 is well tolerated by many cell types over a range of mammalian species and cell photoencapsulation strategies may be optimized to improve cell survival by manipulating proliferation rate.
797 citations
TL;DR: The results demonstrated that at low photoinitiator concentrations, all of the initiator molecules were cytocompatible with the exception of CQ, Irgacure 651, and 4EDMAB which had a relative survival ~ 50% lower than a control.
Abstract: This work investigates the cytocompatibility of several photoinitiating systems for potential cell encapsulation applications. Both UV and visible light initiating schemes were examined. The UV photoinitiators included 2,2-dimethoxy-2-phenylacetophenone (Irgacure 651), 1-hydroxycyclohexyl phenyl ketone (Irgacure 184), 2-methyl-1-[4-(methylthio) phenyl]-2-(4-morpholinyl)-1-propanone (Irgacure 907), and 2-hydroxy-1-[4-(hydroxyethoxy)phenyl]-2-methyl-1-propanone (Darocur 2959). The visible light initiating systems included camphorquinone (CQ) with ethyl 4-N, N-dimethylaminobenzoate (4EDMAB) and triethanolamine (TEA) and the photosensitizer isopropyl thioxanthone. A cultured fibroblast cell line, NIH/3T3, was exposed to the photoinitiators at varying concentrations from 0.01% (w/w) to 0.1% (w/w) with and without the presence of initiating light. The results demonstrated that at low photoinitiator concentrations (6 0.01% (w/w)), all of the initiator molecules were cytocompatible with the exception of CQ, Irgac...
743 citations
606 citations
Patent•
IBM1
TL;DR: In this paper, a photo-initiator is used to generate acid upon radiolysis in a polymer having recurrent pendant groups such as tert-butyl ester or tertbutyl carbonates.
Abstract: Resists sensitive to UV, electron beam and X-ray radiation with positive or negative tone upon proper choice of a developer are formulated from a polymer having recurrent pendant groups such as tert-butyl ester or tert-butyl carbonates that undergo efficient acidolysis with concomitant changes in polarity (solubility) together with a photoinitiator which generates acid upon radiolysis A sensitizer component that alters wavelength sensitivity may also be added
557 citations