Lead Sulfide: Tailoring the Height of Ultrathin PbS Nanosheets and Their Application as Field-Effect Transistors (Small 7/2015)

2D lead sulfide nanosheets with lateral extensions of several micrometers are produced by C. Klinke and co-workers in solution by colloidal chemistry. Their height can be tuned in the range of 2 to over 20 nm by varying the ligand concentrations. On page 826, individual nanosheets used as channel in field-effect transistors show that the confinement in height has a strong influence on the nanosheets' electronic properties in terms of conductivity, On/Off ratio, and sub-threshold swing.