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Two-dimensional colloidal nanosheets represent very attractive optoelectronicmaterials. They combine good lateral conductivity with solution-processabilityand geometry-tunable electronic properties. In case of PbS nanosheets, so farthe synthesis was driven by the addition of chloroalkanes as coligands. Here,we demonstrate how to synthesize two-dimensional lead sulfide nanostructuresusing other halogen alkanes and primary amines. Further, we show that at areaction temperature of 170C a coligand is not even necessary, and the onlyligand, oleic acid, controls the anisotropic growth of the two-dimensionalstructures and using thiourea as sulfide source, nanosheets with lateraldimensions of over 10 microns are possible.

New ways to synthesize lead sulfide nanosheets - substituted alkanes direct the growth of 2D nanostructures