The use of castor oil and ricinoleic acid in lead chalcogenide nanocrystal synthesis

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• 作者：Joseph W. M. Kyobe ; Egid B. Mubofu ; Yahya M. M. Makame…
• 关键词：Castor oil ; Ricinoleic acid ; Lead chalcogenide nanocrystals ; Optical properties ; Green synthesis
• 刊名：International Nano Letters
• 出版年：2016
• 出版时间：December 2016
• 年：2016
• 卷：6
• 期：4
• 页码：235-242
• 全文大小：1,579 KB
• 刊物主题：Nanotechnology;
• 出版者：Springer Berlin Heidelberg
• ISSN：2228-5326
• 卷排序：6

文摘

A green solution-based thermolysis method for the synthesis of lead chalcogenide (PbE, E = S, Se, Te) nanocrystals in castor oil (CSTO) and its isolate ricinoleic acid (RA) is described. The blue shift observed from the optical spectra of CSTO and RA-capped PbE nanocrystals (NCs) confirmed the evidence of quantum confinement. The dimensions of PbE NCs obtained from NIR absorption spectra, transmission electron microscopy (TEM), and X-ray diffraction (XRD) studies were in good agreement. The particle sizes estimated were in the range of 20, 25, and 130 nm for castor oil-capped PbS, PbSe, and PbTe, respectively. Well-defined close to cubic-shaped particles were observed in the scanning electron microscopy (SEM) images of PbSe and PbTe nanocrystals. The high-resolution TEM and selective area electron diffraction (SAED) micrographs of the as-synthesized crystalline PbE NCs showed distinct lattice fringes with d-spacing distances corroborating with the standard values reported in literature.