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The PbS nanocrystals (NCs) embedded in amorphous zirconia sol-gel films were grown at a temperature ranging from 200 to 350 o C. The size of PbS NCs was determined both by TEM and by the blue shift of the absorption edge, which increased with an increase of the synthesis temperature and PbS concentration in the range of 5-30 mol%. Any further increase of the PbS concentration (40-50 mol%)...
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