| Abstract
| - We demonstrate a facile solution-phase method for the synthesis of single-crystal, high aspect ratio, andultrathin nanowires of hexagonal-phase Cu2S by thermal decomposition of CuS2CNEt2 in a mixed surfactantsolvent of dodecanethiol and oleic acid at 160 °C. Cu2S nanowires can be controllably synthesized with adiameter as thin as 1.7 nm and length up to tens of micrometers; they are usually aligned in the form ofbundles with a thickness of hundreds of nanometers. Based on the experimental results, the formationmechanism of the ultrathin nanowires has been properly proposed. Some key synthetic parameters, whichhave a significant effect on the sizes and shapes of the products, have also been investigated in detail. UV−vis spectroscopy measurement reveals that the resultant ultrathin nanowires show a strong quantum size effect.
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