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Ambient-stable blue luminescent silicon nanocrystals prepared by nanosecond-pulsed 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 and Kondo, M (2009) Ambient-stable blue luminescent silicon nanocrystals prepared by nanosecond-pulsed laser ablation in water. Optics Express, 17 (2). pp. 520-527. [Journal article]

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Abstract

Even with intensive research, air-stable blue light emission from silicon nanocrystals (Si-ncs) at room temperature still remains a challenge. We show that stable and blue-luminescent Si-ncs can be produced by laser-generated plasma (nanosecond-pulsed excimer laser) confined in water. These Si-ncs exhibit quantum confinement effect dueto their size and are produced with an environmentally compatible process. The effect of aging for several weeks in water and air on blue Si-ncs emission properties is compared. The oxide shell around the nanocrystalline core formed during laser processing in water offers the required conditions for the confinement of excitons that allow for stable (in either air or water) blue photoluminescence at room temperature. (C) 2008 Optical Society of America

Item Type:Journal article
Faculties and Schools:Faculty of Computing & Engineering > School of Engineering
Research Institutes and Groups:Engineering Research Institute
Engineering Research Institute > Nanotechnology & Integrated BioEngineering Centre (NIBEC)
ID Code:252
Deposited By:Dr Davide Mariotti
Deposited On:03 Sep 2009 10:59
Last Modified:18 Aug 2011 11:51

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