Articles (4)

Luminescence mechanisms in 6H-SiC nanocrystals J. Botsoa, J.M. Bluet, V. Lysenko, L. Sfaxi, Y. Zakharko, O. Marty, G. Guillot Physical Review B: Condensed Matter and Materials Physics 80 155317 2009 AbstractExperimental conditions allowing consequent selection of a dominating photoluminescence mechanism in 6H-SiC nanocrystals at room temperature are reported. Electrostatic screening of surface states involved in radiative transitions can be efficiently achieved by polar ethanol molecules. This leads to a preponderant radiative channel between the electronic levels corresponding to the impurity atoms (N and Al). This radiative channel is deactivated by centrifugation-induced selection of the smallest colloidal 6H-SiC nanocrystals in which the probability to have both donor and acceptor atoms is negligible. Consequently, for these smallest 6H-SiC nanocrystals with switched off transitions between surface states and impurity levels, quantumconfinement effect can be clearly observed. The formation of energy subbands in the 6H-SiC nanocrystals is then evidenced from photoluminescence excitation and absorption measurements performed on the centrifuged colloidal nanosuspension. A most probable mean diameter of 1.9 nm for these particles is deduced from calculation of energy levels in the effective-mass approximation.       Full pdf (Restricted access)

Application of 3C-SiC quantum dots for living cell imaging J. Botsoa, V. Lysenko, A. Geloen, O. Marty, J.M, Bluet, G. Guillot Applied Physics Letters 92 173902 2008       Full pdf (Restricted access)

Photoluminescence of 6H-SiC nanostructures fabricated by electrochemical etching J. Botsoa, J.M, Bluet, V. Lysenko, O. Marty, D. Barbier, G. Guillot Journal of Applied Physics 102 083526 2007       Full pdf (Restricted access)

Incorporation of hydrogen in porous silicon nanocrystallites V. Lysenko, S. Alekseev, J. Botsoa, D. Barbier Physica Status Solidi (a): Applications and Materials Science 204 1307 2007       Full pdf (Restricted access)

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