jp075096z_si_002.pdf (33.01 kB)
l-Cysteine-Assisted Tunable Synthesis of PbS of Various Morphologies
journal contribution
posted on 2007-11-15, 00:00 authored by Shenglin Xiong, Baojuan Xi, Dechen Xu, Chengming Wang, Xiaoming Feng, Hongyang Zhou, Yitai QianThis article describes a facile l-cysteine-assisted solvothermal method in a mixed solution made of
ethylenediamine (en) and distilled water for the large-scale synthesis of various PbS 1D and 3D novel
nanostructures. By varying process parameters such as the molar ratio of Pb(OAc)2 to l-cysteine (reactants),
the volume ratio of water to ethylenediamine, and the reaction temperature, a variety of 3D architectural
structures and a 1D wirelike structure can be controllably synthesized in large quantities. On the basis of
early arrested growth (nanowires), a reasonable possible mechanism for the growth of PbS dendritic structures
has been proposed. The as-prepared PbS products were examined using diverse techniques including X-ray
powder diffraction (XRD), field-emission scanning electron microscopy (FESEM), transmission electron
microscopy (TEM), selected-area electron diffraction, high-resolution TEM, Raman spectroscopy, and
photoluminescence emission.