期刊
NANOTECHNOLOGY
卷 27, 期 35, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0957-4484/27/35/355602
关键词
lead sulfide; nanosheets; self-assembly; oriented attachment; colloidal nanostructures; oleic acid
资金
- German Research Foundation (DFG) [KL 1453/9-1]
- European Research Council [304980]
Two-dimensional colloidal nanosheets represent very attractive optoelectronic materials. They combine good lateral conductivity with solution-processability and geometry-tunable electronic properties. In the case of PbS nanosheets, so far synthesis has been 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 170 degrees C a coligand is not even necessary and the only ligand, oleic acid, controls the anisotropic growth of the two-dimensional structures. Also, using thiourea as a sulfide source, nanosheets with lateral dimensions of over 10 mu m are possible.
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