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Structural effects on Au and Ag colloidal nanoparticles

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Part of the Progress in Colloid and Polymer Science book series (PROGCOLLOID,volume 128)

Abstract

On the nanometer scale, size reduction effects affect materials properties. Au and Ag nanoparticles are interesting cases owing to a structural transition that occurs at nanometric sizes; this has been explored, for example, to change material properties. Here, we present structural studies on dodecanethiol-capped Au and Ag colloidal nanoparticles synthesized at room temperature and 80 °C. For the same synthesis conditions, Au nanoparticle sizes are smaller than Ag ones. From the structure point of view, the synthesis temperature has a minor effect on Au nanoparticles but it induces stacking faults and twin planes in the Ag case. These results suggest that hexagonal close-packed symmetry may be favored for Ag for certain synthesis conditions, but this has not been identified for Au.

Keywords

  • Colloidal gold
  • Nanoparticle
  • High-resolution transmission electron microscopy
  • X-ray diffraction

Acknowledgements: LNLS is acknowledged for the use of LME (HRTEM); SAXS and XRD1 beamlines. This work was funded by FAPESP (01/07715-8), CNPq (470904/2001-1) and CAPES (M.S.L. scholarship).

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  • DOI: 10.1007/b97110
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Correspondence to D. Zanchet .

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© 2004 Springer-Verlag

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Leite, M.S., Rodrigues, V., Zanchet, D. (2004). Structural effects on Au and Ag colloidal nanoparticles. In: Surface and Colloid Science. Progress in Colloid and Polymer Science, vol 128. Springer, Berlin, Heidelberg. https://doi.org/10.1007/b97110

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  • DOI: https://doi.org/10.1007/b97110

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  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-540-21247-8

  • Online ISBN: 978-3-540-39980-3

  • eBook Packages: Springer Book Archive