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Rod–sphere cluster irradiation with femtosecond laser pulses : cut and paste at the nanoscale

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2021

Autor:innen

Díaz-Núñez, Pablo
Thomä, Sabrina L. J.
Borrell-Grueiro, Olivia
Höller, Roland P. M.
Chanana, Munish
Garoz, David
Guerrero-Martínez, Andrés
Rivera, Antonio
Peña-Rodríguez, Ovido
et al.

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Nanophotonics. De Gruyter. 2021, 10(12), pp. 3153-3159. ISSN 2192-8606. eISSN 2192-8614. Available under: doi: 10.1515/nanoph-2021-0240

Zusammenfassung

We report on the irradiation of gold rod–sphere assemblies with ultrashort laser pulses, producing structures that are very difficult to obtain by other methods. The optical response of these assemblies displays several peaks arising from the interaction of the plasmon modes of the individual particles, offering thus great flexibility to control the energy deposited on the individual particles. Judicious selection of the wavelength and fluence of the laser pulses allow fine control over the changes produced: the particles can be melted, welded and/or the organic links cleaved. In this way, it is possible to generate structures “à la carte” with a degree of control unmatched by other synthetic protocols. The method is exemplified with gold nanoparticles, but it can be easily implemented on particles composed of different metals, widening considerably the range of possibilities. The final structures are excellent candidates for surface-enhanced spectroscopies or plasmonic photothermal therapy as they have a very intense electric field located outside the structure, not in the gaps.

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540 Chemie

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laser irradiation, nanoparticle welding, plasmonic assemblies

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ISO 690DÍAZ-NÚÑEZ, Pablo, Sabrina L. J. THOMÄ, Guillermo GONZALEZ-RUBIO, Olivia BORRELL-GRUEIRO, Roland P. M. HÖLLER, Munish CHANANA, David GAROZ, Andrés GUERRERO-MARTÍNEZ, Antonio RIVERA, Ovido PEÑA-RODRÍGUEZ, 2021. Rod–sphere cluster irradiation with femtosecond laser pulses : cut and paste at the nanoscale. In: Nanophotonics. De Gruyter. 2021, 10(12), pp. 3153-3159. ISSN 2192-8606. eISSN 2192-8614. Available under: doi: 10.1515/nanoph-2021-0240
BibTex
@article{DiazNunez2021-09-20Rodsp-59070,
  year={2021},
  doi={10.1515/nanoph-2021-0240},
  title={Rod–sphere cluster irradiation with femtosecond laser pulses : cut and paste at the nanoscale},
  number={12},
  volume={10},
  issn={2192-8606},
  journal={Nanophotonics},
  pages={3153--3159},
  author={Díaz-Núñez, Pablo and Thomä, Sabrina L. J. and Gonzalez-Rubio, Guillermo and Borrell-Grueiro, Olivia and Höller, Roland P. M. and Chanana, Munish and Garoz, David and Guerrero-Martínez, Andrés and Rivera, Antonio and Peña-Rodríguez, Ovido}
}
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