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Formation of Single-Crystal Spherical Particle Architectures by Plasma-Induced Low-Temperature Coalescence of Silicon Nanocrystals Synthesized by Laser Ablation in Water

Biomedical Sciences Research Institute Computer Science Research Institute Environmental Sciences Research Institute Nanotechnology & Advanced Materials Research Institute

Svrcek, V, Mariotti, D, Kalia, K, Dickinson, C and Kondo, M (2011) Formation of Single-Crystal Spherical Particle Architectures by Plasma-Induced Low-Temperature Coalescence of Silicon Nanocrystals Synthesized by Laser Ablation in Water. The Journal of Physical Chemistry C, 115 (14). pp. 6235-6242. [Journal article]

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URL: http://pubs.acs.org/doi/abs/10.1021/jp111387q

DOI: 10.1021/jp111387q

Abstract

We report that the synthesis of silicon nanocrystals (SiNCs) by laser ablation in water produces unique surface characteristics and, in particular, hydroxyl-terminated surfaces, which can induce coalescence and formation of micrometer-sized single-crystal Si spherical particles under a low-temperature (550 °C) plasma process. We demonstrate that the spherical particles can be self-organized into aggregates that extend with varying gas concentrations. At the same time, SiNCs that were sufficiently apart not to coalesce have shown peculiar photoluminescence properties, which suggest an increased tunneling probability from self-trapped excitonic surface states.

Item Type:Journal article
Faculties and Schools:Faculty of Computing & Engineering
Faculty of Computing & Engineering > School of Engineering
Research Institutes and Groups:Engineering Research Institute
Engineering Research Institute > Nanotechnology & Integrated BioEngineering Centre (NIBEC)
ID Code:18209
Deposited By:Dr Davide Mariotti
Deposited On:19 Apr 2011 08:54
Last Modified:14 Sep 2012 10:01

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