Magnetic field dependence of singlet oxygen generation by nanoporous silicon
Department of Physics, University of Bath, Claverton Down, BA2 7AY Bath, UK
Nanoscale Research Letters 2014, 9:342 doi:10.1186/1556-276X-9-342Published: 9 July 2014
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.