Femtosecond laser nano-structuring for surface plasmon resonance-based detection of uranium
Autor: | Sergii Mamykin, T.A. DeVol, M. Dusheyko, Valery N. Bliznyuk, I.M. Gnilitskyi |
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Rok vydání: | 2022 |
Předmět: |
Materials science
General Physics and Astronomy chemistry.chemical_element Nanoparticle Nanotechnology Surfaces and Interfaces General Chemistry Uranium Condensed Matter Physics Laser Surfaces Coatings and Films law.invention Nanolithography chemistry law Femtosecond Prism Surface plasmon resonance Diffraction grating |
Zdroj: | Applied Surface Science. 576:151831 |
ISSN: | 0169-4332 |
Popis: | Surface plasmon resonance (SPR) is a proven technique in sensorics. Wide application of the method is still limited by a necessity of a complex optical equipment using special dispersion elements like a prism or diffraction grating (DG). We have implemented a novel and inexpensive way for fabrication of the DG on a silicon substrate using femtosecond laser ablation (highly regular laser-induced periodic surface structures - HR-LIPSS) technique. The potential of the method has been illustrated for the case of detection of uranium in water. For this purpose, fabricated gratings were coated with thermally evaporated nanofilms of gold and then used as substrates for deposition of nanoparticles of bioinspired polymer polydopamine (PDA) highly selective to uranium under neutral pH. Synergistic combination of the advanced nanofabrication and SPR sensing techniques with advanced PDA ligand allowed preparation of sensing elements with a sub-microgram sensitivity to uranium (∼1.0 x 10-7 g/cm2). Even though the results reported here are just a proof of concept, we believe the approach can be expanded to selective detection of various types of analytes (heavy metals, biomolecules, viruses etc.) under different environments (water, air, aerosols) in the future. |
Databáze: | OpenAIRE |
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