New initiator for two-photon absorption induced polymerization with a microlaser at 1.06 μm

Two-photon absorption (TPA) induced polymerization is a very promising way for three-dimensional (3D) microfabrication. However, the necessity to use onerous femtosecond Ti:sapphire lasers appears as a major drawback for this technology. We present a new symmetrical conjugated ketone with terminal a...

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Bibliographic Details
Published in:Synthetic metals 2003-06, Vol.138 (1), p.353-356
Main Authors: Martineau, C, Lemercier, G, Andraud, C, Wang, I, Bouriau, M, Baldeck, P.L
Format: Article
Language:English
Subjects:
Applied sciences
Catalysis
Chemical Sciences
Exact sciences and technology
Initiator
Inorganic chemistry
Material chemistry
Microlaser
Organic chemistry
Photopolymerization
Physicochemistry of polymers
Polymerization
Polymers and radiations
Two-photon absorption
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Summary:Two-photon absorption (TPA) induced polymerization is a very promising way for three-dimensional (3D) microfabrication. However, the necessity to use onerous femtosecond Ti:sapphire lasers appears as a major drawback for this technology. We present a new symmetrical conjugated ketone with terminal amino groups that can initiate TPA photopolymerization of acrylates when irradiated with an inexpensive Nd-YAG microlaser. This compound shows broad band TPA between 800 nm and 1100 nm with a cross-section of 100×10 −50 cm 4 s photon −1 at the photoinitiation wavelength (1.06 μm). The efficiency of this new initiator is evaluated by the determination of the threshold of absorbed energy density for polymerization.
ISSN:0379-6779
1879-3290
DOI:10.1016/S0379-6779(03)00111-5