Jump to main content
Jump to site search

Issue 15, 2016
Previous Article Next Article

Hierarchical organization and molecular diffusion in gold nanorod/silica supercrystal nanocomposites

Author affiliations

Abstract

Hierarchical organization of gold nanorods was previously obtained on a substrate, allowing precise control over the morphology of the assemblies and macroscale spatial arrangement. Herein, a thorough description of these gold nanorod assemblies and their orientation within supercrystals is presented together with a sol–gel technique to protect the supercrystals with mesoporous silica films. The internal organization of the nanorods in the supercrystals was characterized by combining focused ion beam ablation and scanning electron microscopy. A mesoporous silica layer is grown both over the supercrystals and between the individual lamellae of gold nanorods inside the structure. This not only prevented the detachment of the supercrystal from the substrate in water, but also allowed small molecule analytes to infiltrate the structure. These nanocomposite substrates show superior Raman enhancement in comparison with gold supercrystals without silica owing to improved accessibility of the plasmonic hot spots to analytes. The patterned supercrystal arrays with enhanced optical and mechanical properties obtained in this work show potential for the practical implementation of nanostructured devices in spatially resolved ultradetection of biomarkers and other analytes.

Graphical abstract: Hierarchical organization and molecular diffusion in gold nanorod/silica supercrystal nanocomposites

Back to tab navigation

Supplementary files

Publication details

The article was received on 26 Jan 2016, accepted on 26 Feb 2016 and first published on 29 Feb 2016


Article type: Paper
DOI: 10.1039/C6NR00712K
Citation: Nanoscale, 2016,8, 7914-7922
  • Open access: Creative Commons BY license
  •   Request permissions

    Hierarchical organization and molecular diffusion in gold nanorod/silica supercrystal nanocomposites

    C. Hamon, M. N. Sanz-Ortiz, E. Modin, E. H. Hill, L. Scarabelli, A. Chuvilin and L. M. Liz-Marzán, Nanoscale, 2016, 8, 7914
    DOI: 10.1039/C6NR00712K

    This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. Material from this article can be used in other publications provided that the correct acknowledgement is given with the reproduced material.

    Reproduced material should be attributed as follows:

    • For reproduction of material from NJC:
      [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the Centre National de la Recherche Scientifique (CNRS) and the RSC.
    • For reproduction of material from PCCP:
      [Original citation] - Published by the PCCP Owner Societies.
    • For reproduction of material from PPS:
      [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the European Society for Photobiology, the European Photochemistry Association, and RSC.
    • For reproduction of material from all other RSC journals:
      [Original citation] - Published by The Royal Society of Chemistry.

    Information about reproducing material from RSC articles with different licences is available on our Permission Requests page.

Search articles by author

Spotlight

Advertisements