Quantitative comparison of five different photosensitizers for use in a photopolymer

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Title: Quantitative comparison of five different photosensitizers for use in a photopolymer
Authors: Qi, Yue | Gleeson, Michael R. | Guo, Jinxin | Gallego, Sergi | Sheridan, John T.
Research Group/s: Holografía y Procesado Óptico
Center, Department or Service: Universidad de Alicante. Departamento de Física, Ingeniería de Sistemas y Teoría de la Señal | University College Dublin. Communications and Optoelectronic Research Centre, The SFI-Strategic Research Cluster in Solar Energy Conversion, College of Engineering and Architecture | Universidad de Alicante. Instituto Universitario de Física Aplicada a las Ciencias y las Tecnologías | Department of Computer Science, NUIM, Maynooth, Kildare, Ireland
Keywords: Photosensitizers | Photopolymers | Holography | Volume holograms
Knowledge Area: Física Aplicada | Óptica
Date Created: 2-May-2012
Issue Date: 14-Sep-2012
Publisher: Hindawi Publishing Corporation
Citation: QI, Yue, et al. "Quantitative comparison of five different photosensitizers for use in a photopolymer". Physics Research International. Vol. 2012, Article ID 975948, 11 pages (2012). ISSN 2090-2220
Abstract: Several studies of the time varying photon absorption effects, which occur during the photoinitiation process involving in photopolymer materials, have been presented. Three primary mechanisms have been identified: (i) the dye absorption, (ii) recovery, and (iii) bleaching. Based on an analysis of these mechanisms, the production of primary radicals can be physically described and modelled. In free radical photopolymerization systems, the excited dye molecules induce the production of the primary radicals, R.,which are key in determining how many monomers are polymerized. This, in turn, is closely related to the refractive index modulation formed during holographic recording. In this paper, to avoid the complexities involved in estimating the rate constant of intersystem crossing, kst, in going from the excited singlet state dye to the excited triplet state dye, we introduce two rates, kaS and kaT these are the proposed rate constants of photon absorption in going from the ground state to the singlet and triplet states, respectively. Using the resulting model, four kinds of Xanthene dyes: Erythrosin B; Eosin Y; Phloxine B, Rose Bengal, and one Thiazine dye: Methylene Blue, are experimentally characterised for use in an AA/PVA photopolymer.
Sponsor: The authors would like to acknowledge the funding support of the EU ERUSMAS Mundus fund. They would also like to acknowledge the support of Enterprise Ireland and Science Foundation Ireland under the national development fund and the Irish Research Council for Science, Engineering and Technology (IRCSET) through the EMPOWER postgraduate and postdoctoral fellowship schemes and the Ministerio de Economía y Competitividad of Spain under Project FIS2011-29803-C02-01 as well.
URI: http://hdl.handle.net/10045/24456
ISSN: 2090-2220 (Print) | 2090-2239 (Online)
DOI: 10.1155/2012/975948
Language: eng
Type: info:eu-repo/semantics/article
Rights: Copyright © 2012 Yue Qi et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Peer Review: si
Publisher version: http://dx.doi.org/10.1155/2012/975948
Appears in Collections:INV - GHPO - Artículos de Revistas

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