Platelet-shaped nanoparticles of PbI2 and PbMnI2 embedded in polymer matrix

Nanocrystals of PbI2 and Pb1−xMnxI2 (0<x<0.15) embedded in transparent polymer matrix have been studied by optical absorption and Faraday rotation spectroscopy. Average size of semiconductor nanoparticles was controlled by choosing polymer material and growth conditions. The obtained nanoparticles are platelet-like, with thickness up to 0.7 nm. The observed exciton peaks in the absorption spectra for nanocrystals into gelatin matrix correspond to the discrete thickness of the nanoparticles, which include finite number of atomic layers. For the Faraday rotation of Pb1−xMnxI2 nanocrystals, reversal negative sign and additional enhancement has been revealed as compared with bulk crystals.