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Plasmonic Photochemistry as a Tool to Prepare Metallic Nanopores with Controlled Diameter for Optimized Detection of Single Entities

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2023

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Lanzavecchia, German
Doricchi, Andrea
Douaki, Ali
Kumaranchira Ramankutty, Krishnadas
García, Isabel
Lin, Lyuye
Viejo Rodríguez, Alba
Maccaferri, Nicolò
Garoli, Denis
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Advanced Optical Materials. Wiley. 2023, 11(16), 2300786. eISSN 2195-1071. Available under: doi: 10.1002/adom.202300786

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Plasmonic solid-state nanopores with tunable hole diameters can be prepared via a photocatalytic effect resulting from the enhanced electromagnetic (EM) field inside a metallic ring on top of a dielectric nanotube. Under white light illumination, the plasmon-enhanced EM-field induces a site-selective metal nucleation and growth within the ring. This approach is used to prepare Au and bimetallic Au–Ag nano-rings and demonstrate the reduction of the initial inner diameter of the nanopore down to 4 nm. The tunability of the nanopore diameter can be used to enable optimized detection of single entities with different sizes. As a proof-of-concept, single object detection of double stranded DNA (dsDNA) and Au nanoparticles (AuNPs) with a diameter down to 15 nm is performed. Numerical simulations provide insights into the EM-field distribution and confinement, showing that a field intensity enhancement of up to 104 can be achieved inside the nanopores. This localized EM-field can be used to perform enhanced optical measurements and generate local heating, thereby modifying the properties of the nanopore. Such a flexible approach also represents a valuable tool to investigate plasmon-driven photochemical reactions, and it can represent an important step toward the realization of new plasmonic devices.

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ISO 690LANZAVECCHIA, German, Joel KUTTRUFF, Andrea DORICCHI, Ali DOUAKI, Krishnadas KUMARANCHIRA RAMANKUTTY, Isabel GARCÍA, Lyuye LIN, Alba VIEJO RODRÍGUEZ, Nicolò MACCAFERRI, Denis GAROLI, 2023. Plasmonic Photochemistry as a Tool to Prepare Metallic Nanopores with Controlled Diameter for Optimized Detection of Single Entities. In: Advanced Optical Materials. Wiley. 2023, 11(16), 2300786. eISSN 2195-1071. Available under: doi: 10.1002/adom.202300786
BibTex
@article{Lanzavecchia2023Plasm-68878,
  year={2023},
  doi={10.1002/adom.202300786},
  title={Plasmonic Photochemistry as a Tool to Prepare Metallic Nanopores with Controlled Diameter for Optimized Detection of Single Entities},
  number={16},
  volume={11},
  journal={Advanced Optical Materials},
  author={Lanzavecchia, German and Kuttruff, Joel and Doricchi, Andrea and Douaki, Ali and Kumaranchira Ramankutty, Krishnadas and García, Isabel and Lin, Lyuye and Viejo Rodríguez, Alba and Maccaferri, Nicolò and Garoli, Denis},
  note={Article Number: 2300786}
}
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