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Silicon Nanocrystals in Liquid Media: Optical Properties and Surface Stabilization by Microplasma-Induced Non-Equilibrium Liquid Chemistry

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

Mariotti, D, Svrcek, V, Hamilton, JWJ, Schmidt, M and Kondo, M (2012) Silicon Nanocrystals in Liquid Media: Optical Properties and Surface Stabilization by Microplasma-Induced Non-Equilibrium Liquid Chemistry. Advanced Functional Materials, 22 (5). pp. 954-964. [Journal article]

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URL: http://dx.doi.org/10.1002/adfm.201102120

DOI: 10.1002/adfm.201102120

Abstract

Surface engineering of silicon nanocrystals directly in water or ethanol by atmospheric-pressure dc microplasma is reported. In both liquids, microplasma processing stabilizes the optoelectronic properties of silicon nanocrystals. The microplasma treatment induces non-equilibrium liquid chemistry that passivates the silicon nanocrystals surface with oxygen-/organic-based terminations. In particular, the microplasma treatment in ethanol drastically enhances the silicon nanocrystals photoluminescence intensity and causes a clear red-shift (≈80 nm) of the photoluminescence maximum. The photoluminescence properties are stable after several days of storage in either ethanol or water. The surface chemistry induced by the microplasma treatment is analyzed and discussed.

Item Type:Journal article
Keywords:silicon quantum dots, microplasma, photoluminescence
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:21300
Deposited By:Dr Davide Mariotti
Deposited On:07 Mar 2012 11:43
Last Modified:07 Mar 2012 11:43

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