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| Main Authors: | , , , , , |
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| Format: | Preprint |
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2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2511.10169 |
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| _version_ | 1866914156380160000 |
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| author | Tartaj, Pedro Luengo, Yurena Moronta, Pedro Forzani, Luisina Blanco, Alvaro López, Cefe |
| author_facet | Tartaj, Pedro Luengo, Yurena Moronta, Pedro Forzani, Luisina Blanco, Alvaro López, Cefe |
| contents | Earth-abundant materials exhibiting Mie resonances across the visible and near-infrared offer opportunities for efficient and sustainable sensing, thermal regulation, and sunlight harvesting. For anatase TiO$_2$, a broadband optical and abundant material, Mie calculations indicate that robust resonances require size tunability and monodispersity (standard deviation, $\lesssim$ 5\%) over an extended range (0.5-2 $μ$m) not yet experimentally covered, while maintaining a refractive index above 2 to ensure optical contrast, for example with biomolecules. Here, we demonstrate that a simple UV-assisted thermal hydrolysis route yields anatase particles that meet all these criteria and remain aqueous-processable. Consequently, the materials display intense and modulable Mie resonances across the visible/near-infrared regions (including biological windows), outperforming previous results that were limited by size. Strong optical resonances combined with ambient-temperature processability enable robust, broadband, label-free detection of transparent biomolecules. Our insights advance precise synthesis and Mie-based photonics of an earth-abundant material, and indicate the potential for cost-effective and rapid-on-demand integration via printing technologies, further enhanced by anatase's biocompatibility and photochemical properties. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_10169 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Wavelength-commensurate anatase TiO\_2 particles for ro-bust and functional Mie resonances across the visible and near infrared Tartaj, Pedro Luengo, Yurena Moronta, Pedro Forzani, Luisina Blanco, Alvaro López, Cefe Materials Science Earth-abundant materials exhibiting Mie resonances across the visible and near-infrared offer opportunities for efficient and sustainable sensing, thermal regulation, and sunlight harvesting. For anatase TiO$_2$, a broadband optical and abundant material, Mie calculations indicate that robust resonances require size tunability and monodispersity (standard deviation, $\lesssim$ 5\%) over an extended range (0.5-2 $μ$m) not yet experimentally covered, while maintaining a refractive index above 2 to ensure optical contrast, for example with biomolecules. Here, we demonstrate that a simple UV-assisted thermal hydrolysis route yields anatase particles that meet all these criteria and remain aqueous-processable. Consequently, the materials display intense and modulable Mie resonances across the visible/near-infrared regions (including biological windows), outperforming previous results that were limited by size. Strong optical resonances combined with ambient-temperature processability enable robust, broadband, label-free detection of transparent biomolecules. Our insights advance precise synthesis and Mie-based photonics of an earth-abundant material, and indicate the potential for cost-effective and rapid-on-demand integration via printing technologies, further enhanced by anatase's biocompatibility and photochemical properties. |
| title | Wavelength-commensurate anatase TiO\_2 particles for ro-bust and functional Mie resonances across the visible and near infrared |
| topic | Materials Science |
| url | https://arxiv.org/abs/2511.10169 |