Title

Two-photon photoinitiated polymerization

Authors

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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