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5 March 2021 Modeling of polymerization kinetics in femtosecond two photon polymerization
Jason E. Johnson, Yijie Chen, Paul Somers, Xianfan Xu
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Proceedings Volume 11675, Synthesis and Photonics of Nanoscale Materials XVIII; 116750M (2021) https://doi.org/10.1117/12.2581960
Event: SPIE LASE, 2021, Online Only
Abstract
There is a lack of a comprehensive understanding of the size reduction in femtosecond two-photon polymerization (TPP) fabricated structures. In this work, we aim to evaluate the volumetric strain distribution induced by covalent bond formation during TPP. We present a transient computational model which simulates the photochemical processes during TPP and calculates the functional group conversion at each time step. The nonuniform strain development is obtained by incorporating the shrinkage – double bond conversion correlation of bulk materials. The shrinkage induced by chemical bond formation is found to reduce the size of the final structure on the order of a few percent.
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Jason E. Johnson, Yijie Chen, Paul Somers, and Xianfan Xu "Modeling of polymerization kinetics in femtosecond two photon polymerization", Proc. SPIE 11675, Synthesis and Photonics of Nanoscale Materials XVIII, 116750M (5 March 2021); https://doi.org/10.1117/12.2581960
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KEYWORDS
Femtosecond phenomena
Two photon polymerization
Polymerization
Polymers
Molecular lasers
Optical simulations
Oxygen
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