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

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 coli...

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Bibliographic Details
Published in:arXiv.org 2016-07
Main Authors: Bielewicz, Thomas, Klein, Eugen, Klinke, Christian
Format: Article
Language:English
Subjects:
Alkanes
Amines
Electronic properties
Lead sulfides
Nanosheets
Nanostructure
Oleic acid
Optoelectronics
Organochlorine compounds
Synthesis
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Summary: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.
ISSN:2331-8422
DOI:10.48550/arxiv.1607.08739