Redox Multiphoton Polymerization for 3D Nanofabrication
| Autor: | Maria Vamvakaki, David Gray, Argyro N. Giakoumaki, Elmina Kabouraki, Paulius Danilevicius, Maria Farsari |
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| Rok vydání: | 2013 |
| Předmět: |
Materials science
Mechanical Engineering Radical Vanadium chemistry.chemical_element Bioengineering 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Photochemistry 01 natural sciences 0104 chemical sciences Photopolymer chemistry Polymerization Femtosecond General Materials Science Laser power scaling 0210 nano-technology Absorption (electromagnetic radiation) Photoinitiator |
| Zdroj: | Nano Letters. 13:3831-3835 |
| ISSN: | 1530-6992 1530-6984 |
| Popis: | We report for the first time on the redox multiphoton polymerization of an organic-inorganic composite material, in which one of the components, a vanadium metallo-organic complex, initiates the polymerization. The composite employs multiphoton absorption to self-generate radicals by photoinduced reduction of the metal species from vanadium (V) to vanadium (IV). We exploit this material for the fabrication of fully 3D structures by multiphoton polymerization with 200 nm resolution, employing a femtosecond laser operating at 800 nm, in the absence of a photoinitiator. Nonlinear absorption measurements indicate that the use of an 800 nm laser initiates the photopolymerization due to three-photon absorption of the vanadium alkoxide. The laser power required to induce this three-photon polymerization is comparable to what is required for inducing two-photon polymerization in materials using standard two-photon absorbers, most likely due to the high content of vanadium in the final composite (up to 50% mole). |
| Databáze: | OpenAIRE |
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