Jump to main content
Jump to site search

Issue 25, 2015
Previous Article Next Article

Dominant luminescence is not due to quantum confinement in molecular-sized silicon carbide nanocrystals

Author affiliations

Abstract

Molecular-sized colloid silicon carbide (SiC) nanoparticles are very promising candidates to realize bioinert non-perturbative fluorescent nanoparticles for in vivo bioimaging. Furthermore, SiC nanoparticles with engineered vacancy-related emission centres may realize magneto-optical probes operating at nanoscale resolution. Understanding the nature of molecular-sized SiC nanoparticle emission is essential for further applications. Here we report an efficient and simple method to produce a relatively narrow size distribution of water soluble molecular-sized SiC nanoparticles. The tight control of their size distribution makes it possible to demonstrate a switching mechanism in the luminescence correlated with particle size. We show that molecular-sized SiC nanoparticles of 1–3 nm show a relatively strong and broad surface related luminescence whilst the larger ones exhibit a relatively weak band edge and structural defect luminescence with no evidence of quantum confinement effect.

Graphical abstract: Dominant luminescence is not due to quantum confinement in molecular-sized silicon carbide nanocrystals

Back to tab navigation

Supplementary files

Publication details

The article was received on 21 Feb 2015, accepted on 21 May 2015 and first published on 25 May 2015


Article type: Communication
DOI: 10.1039/C5NR01204J
Author version
available:
Download author version (PDF)
Nanoscale, 2015,7, 10982-10988
  • Open access: Creative Commons BY-NC license
  •   Request permissions

    Dominant luminescence is not due to quantum confinement in molecular-sized silicon carbide nanocrystals

    D. Beke, Z. Szekrényes, Z. Czigány, K. Kamarás and Á. Gali, Nanoscale, 2015, 7, 10982
    DOI: 10.1039/C5NR01204J

    This article is licensed under a Creative Commons Attribution-NonCommercial 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 and it is not used for commercial purposes.

    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