J. Phys. IV France 03 (1993) C8-377-C8-380
CdSxSe1-x nanocrystals in a silicate glassA. RAMOS1, D. TCHOUBAR2 and C.H. PONS2
1 Laboratoire de Minéralogie-Cristallographie (UA 09), Tour 16, Case 115, 4 place Jussieu, 75252 Paris cedex 5, France
2 Centre de Recherche sur la Matière Divisée (UM 0131), BP. 6759, rue de Chartres, 45067 Orléans cedex 2, France
A dilute system of CdSxSe1-x nanocrystals with low anisotropy and low size dispersion has been studied by SAXS. The presence of angularities at the surface of the nanoparticles is evidenced from the limit at zero of the chord distribution function. Moreover in a model of spherical particles the size given by the average chord does not agree with that given by the integral parameters. A cubic particle shape has been used to evaluation of the size distribution. This distribution agrees with the expected one, and allows to confirm the validity of a polyedral model for the treatment of the SAXS data. Structural information on the particle surface can be deduced from the presence of the angularities.
© EDP Sciences 1993