Synthesis and characterization of lead chalcogenide nanoparticles (PbE, E = selenium, tellurium) semiconductor nanocomposite materials in silica matrices
The semiconductors such as PbE (E = Se, Te) are known for their large band gaps. These band gaps provide unique properties to PbE. At the nanoscale the properties are enhanced due to increase in the surface area to volume ratio and the emergence of new properties such as photoluminescence and multiple electron generation. The sol-gel method has been used as a general process for synthesis of nanocomposites in silica matrices. This project entails the development of a synthesis pathway through ideal selection of solvent used, source of lead, heat treatment time and temperature. X-ray patterns of experiments conducted and calculated average particle size are used as a support for the changes in synthesis design. The final reaction pathways of PbSe and PbTe nanocomposites are explained and respective particle sizes are confirmed using TEM. This designed synthesis pathway will play a key role in synthesis design of PbSe/TiO2 and PbTe/TiO2 nanocomposites. Since the reaction mechanism is not completely understood, there are still some issue with particle size that remains to be addressed in future projects.
"Synthesis and characterization of lead chalcogenide nanoparticles (PbE, E = selenium, tellurium) semiconductor nanocomposite materials in silica matrices"
ETD Collection for Tennessee State University.