Formation of silver nanoprisms with surface plasmons at communication wavelengths

  • Bastys V
  • Pastoriza-Santos I
  • Rodíguez-González B
 et al. 
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Abstract

Silver nanoprisms with strong absorption in the near-IR have been
synthesized using a modification of the photoinduced method by illuminating
preformed silver seeds under different illumination conditions. Low-intensity
light-emitting diodes and white light combined with different color
filters are used as light sources. The lateral dimensions of the
nanoprisms are found to be correlated in a quasilinear fashion with
the emission wavelength and the position of the main in-plane dipole
plasmon band. The structural characterization of the Ag nanoparticles,
carried out using scanning electron microscopy., transmission electron
microscopy (TEM), high-resolution TEM. and electron diffraction,
reveal that the particles are flat and have a single-crystal face-centered-cubic
structure. Time-resolved studies suggest that the nanoprisms are
formed by steady consumption of the original Ag seeds with little
variation of the aspect ratio after a short induction time.

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Authors

  • Vytautas Bastys

  • Isabel Pastoriza-Santos

  • Benito Rodíguez-González

  • Rimas Vaisnoras

  • Luis M. Liz-Marzán

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