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

Abstract

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

arXiv comment27 pages, 10 figures

References in corpus (3)

• Ultra-thin PbS sheets by two-dimensional oriented attachment
• Tailoring the height of ultrathin PbS nanosheets and their application as field-effect transistors
• From dots to stripes to sheets - Shape control of lead sulfide nanostructures

Cited by in corpus (5)

• Photoexcitation of PbS Nanosheets Leads to Highly Mobile Charge Carriers and Stable Excitons
• Insights into the formation mechanism of two-dimensional lead halide nanostructures
• High Performance n- and p-Type Field-Effect Transistors Based on Hybridly Surface-Passivated Colloidal PbS Nanosheets
• Synthesis of single-crystalline lead sulfide nanoframes and nanorings
• Colloidal Lead Iodide Nanorings