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Open Access Nano Express

Magnetic field dependence of singlet oxygen generation by nanoporous silicon

Jamaree Amonkosolpan, Gazi N Aliev, Daniel Wolverson*, Paul A Snow and James John Davies

Author Affiliations

Department of Physics, University of Bath, Claverton Down, BA2 7AY Bath, UK

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Nanoscale Research Letters 2014, 9:342  doi:10.1186/1556-276X-9-342

Published: 9 July 2014

Abstract

Energy transfer from photoexcited excitons localized in silicon nanoparticles to adsorbed oxygen molecules excites them to the reactive singlet spin state. This process has been studied experimentally as a function of nanoparticle size and applied external magnetic field as a test of the accepted understanding of this process in terms of the exchange coupling between the nano-Si exciton and the adsorbed O2 molecules.

Keywords:
Singlet oxygen; Photoluminescence; Energy transfer; Porous silicon