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Wavelength-optimized two-photon polymerization using initiators based on multipolar aminostyryl-1,3,5-triazines

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posted on 04.12.2018 by Maximilian Tromayer, Peter Gruber, Arnulf Rosspeintner, Aliasghar Ajami, Wolfgang Husinsky, Felix Plasser, Leticia Gonzalez, Eric Vauthey, Aleksandr Ovsianikov, Robert Liska
Two-photon induced polymerization (2PP) based 3D printing is a powerful microfabrication tool. Specialized two-photon initiators (2PIs) are critical components of the employed photosensitive polymerizable formulations. This work investigates the cooperative enhancement of two-photon absorption cross sections (σ2PA) in a series of 1,3,5-triazine-derivatives bearing 1-3 aminostyryl-donor arms, creating dipolar, quadrupolar and octupolar push-pull systems. The multipolar 2PIs were successfully prepared and characterized, σ2PA were determined using z-scan at 800 nm as well as spectrally resolved two-photon excited fluorescence measurements, and the results were compared to high-level ab initio computations. Modern tunable femtosecond lasers allow 2PP-processing at optimum wavelengths tailored to the absorption behavior of the 2PI. 2PP structuring tests revealed that while performance at 800 nm is similar, at their respective σ2PA-maxima the octupolar triazine-derivative outperforms a well-established ketone-based quadrupolar reference 2PI, with significantly lower fabrication threshold at exceedingly high writing speeds up to 200 mm/s and a broader window for ideal processing parameters.

Funding

The authors acknowledge the financial support by the Austrian Science Fund (FWF): P 27555, TU Wien, the University of Vienna and the Universite de Geneve.

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  • Science

Department

  • Chemistry

Published in

Scientific Reports

Citation

TROMAYER, M. ... et al, 2018. Wavelength-optimized two-photon polymerization using initiators based on multipolar aminostyryl-1,3,5-triazines. Scientific Reports, 8, Article number: 17273.

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Springer Nature © The Authors

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This work is made available according to the conditions of the Creative Commons Attribution 4.0 International (CC BY 4.0) licence. Full details of this licence are available at: http://creativecommons.org/licenses/ by/4.0/

Acceptance date

24/09/2018

Publication date

2018-11-22

Notes

This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

ISSN

2045-2322

Language

en

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