https://doi.org/10.1051/epjconf/201819004018
Near-infrared photopolymerization assisted by upconversion nanophosphors for biomedical applications
1
Federal Scientific Research Centre “Crystallography and Photonics” of the Russian Academy of Sciences, 119333 Moscow, Russia
2
Sechenov First Moscow State Medical University, 119991 Moscow, Russia
3
Institute of Fine Chemical Technologies, Moscow Technological University, 119571 Moscow, Russia
4
Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry of Russian Academy of Sciences, 117197 Moscow, Russia
* Corresponding author: a.g.savelyev@gmail.com
Published online: 26 September 2018
We present the concept and the experimental demonstration of near-infrared photopolymerization assisted by specially designed upconversion nanophosphors. The principle of this technique is based on conversion of 980 nm laser irradiation to ultraviolet photons subsequently absorbed by photoinitiator. The nonlinearity of upconversion allows for activation of the process locally in the laser beam waist. This approach enables precise fabrication of 3D constructs directly in the volume of photocurable composition. Furthermore, the presented technique is suitable for polymerization of a wide range of photocurable resins as well as gelation of hydrogels for biomedical applications.
© The Authors, published by EDP Sciences, 2018
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