Two-photon photoinitiated polymerization

    Authors

    K. D. Belfield;K. J. Schafer

    Comments

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    Keywords

    OPTICAL-DATA STORAGE; 2-PHOTON POLYMERIZATION; CROSS-LINKING; PHOTOPOLYMERIZATION; MICROFABRICATION; 4-METHYLENE-2-PHENYL-1, 3-DIOXOLANE; FABRICATION; EXCITATION; SYSTEM; Chemistry, Multidisciplinary; Chemistry, Physical; Polymer Science

    Abstract

    The three-dimensional (3-D) spatial resolution of the two-photon absorption (2PA) process is being harnessed for 3-D microstructure fabrication and microlithography. In addition to the inherent spatial resolution of the two-photon excitation process, two-photon absorption can occur in certain materials at wavelengths well beyond that which monomers, polymers, and most organic substances absorb (one-photon), affording a greater depth of pcnetration and, in principle, creating little or no damage to the host. The near-IR two-photon induced free radical polymerization of (meth)acrylate monomers and the near-IR two-photon induced cationic polymerization of epoxide monomers using commercially available photoinitiator systems is described. We report the two-photon induced polymerization of a thiol-ene resin system utilizing near-IR radiation and a commercially available photoinitiator, isopropylthioxanthone (ITX). Polymerization depths of over 2 cm were achieved, demonstrating a new paradigm for deep curing of adhesives.

    Journal Title

    Photoinitiated Polymerization

    Volume

    847

    Publication Date

    1-1-2003

    Document Type

    Article

    Language

    English

    First Page

    464

    Last Page

    481

    WOS Identifier

    WOS:000183317100039

    ISSN

    0097-6156; 0-8412-3813-8

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