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Askari S, Ul Haq A, Macias-Montero M, et al. Ultra-small photoluminescent silicon-carbide nanocrystals by atmospheric-pressure plasmas. Nanoscale. 2016;8(39):17141-17149doi: 10.1039/c6nr03702j.
Askari, S., Ul Haq, A., Macias-Montero, M., Levchenko, I., Yu, F., Zhou, W., Ostrikov, K. K., Maguire, P., Svrcek, V., & Mariotti, D. (2016). Ultra-small photoluminescent silicon-carbide nanocrystals by atmospheric-pressure plasmas. Nanoscale, 8(39), 17141-17149. https://doi.org/10.1039/c6nr03702j
Askari, Sadegh, et al. "Ultra-small photoluminescent silicon-carbide nanocrystals by atmospheric-pressure plasmas." Nanoscale vol. 8,39 (2016): 17141-17149. doi: https://doi.org/10.1039/c6nr03702j
Askari S, Ul Haq A, Macias-Montero M, Levchenko I, Yu F, Zhou W, Ostrikov KK, Maguire P, Svrcek V, Mariotti D. Ultra-small photoluminescent silicon-carbide nanocrystals by atmospheric-pressure plasmas. Nanoscale. 2016 Oct 06;8(39):17141-17149. doi: 10.1039/c6nr03702j. PMID: 27722686.
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Nanoscale. 2016 Oct 06;8(39):17141-17149. doi: 10.1039/c6nr03702j.

Ultra-small photoluminescent silicon-carbide nanocrystals by atmospheric-pressure plasmas.

Nanoscale

Sadegh Askari, Atta Ul Haq, Manuel Macias-Montero, Igor Levchenko, Fengjiao Yu, Wuzong Zhou, Kostya Ken Ostrikov, Paul Maguire, Vladimir Svrcek, Davide Mariotti

Affiliations

  1. Nanotechnology & Integrated Bio-Engineering Centre, Ulster University, BT37 0QB, UK. [email protected] and Department of Physics, Chemistry and biology (IFM), Linköping University, SE-581 83 Linköping, Sweden.
  2. Nanotechnology & Integrated Bio-Engineering Centre, Ulster University, BT37 0QB, UK. [email protected].
  3. School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane QLD 4000, Australia.
  4. EaStChem, School of Chemistry, University of St Andrews, St Andrews, KY16 9ST, UK.
  5. Institute for Future Environments and School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane QLD 4000, Australia and CSIRO-QUT Joint Sustainable Processes and Devices Laboratory, Commonwealth Scientific and Industrial Research Organization, P.O. Box 218, Lindfield, NSW 2070, Australia.
  6. Research Center of Photovoltaics, National Institute of Advanced Industrial Science and Technology-AIST, Central 2, Tsukuba, Japan.

PMID: 27722686 DOI: 10.1039/c6nr03702j

Abstract

Highly size-controllable synthesis of free-standing perfectly crystalline silicon carbide nanocrystals has been achieved for the first time through a plasma-based bottom-up process. This low-cost, scalable, ligand-free atmospheric pressure technique allows fabrication of ultra-small (down to 1.5 nm) nanocrystals with very low level of surface contamination, leading to fundamental insights into optical properties of the nanocrystals. This is also confirmed by their exceptional photoluminescence emission yield enhanced by more than 5 times by reducing the nanocrystals sizes in the range of 1-5 nm, which is attributed to quantum confinement in ultra-small nanocrystals. This method is potentially scalable and readily extendable to a wide range of other classes of materials. Moreover, this ligand-free process can produce colloidal nanocrystals by direct deposition into liquid, onto biological materials or onto the substrate of choice to form nanocrystal films. Our simple but efficient approach based on non-equilibrium plasma environment is a response to the need of most efficient bottom-up processes in nanosynthesis and nanotechnology.

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