10.1007/s40089-016-0189-4

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

  1. Department of Chemistry, University of Dar es Salaam, Dar es Salaam, TZ Department of Chemistry, University of Zululand, Kwa-Dlangezwa, 3886, ZA Department of Chemistry, St. John’s University of Tanzania, Dodoma, TZ
  2. Department of Chemistry, University of Dar es Salaam, Dar es Salaam, TZ
  3. Department of Chemistry, University of Zululand, Kwa-Dlangezwa, 3886, ZA
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Published in Issue 2016-08-23

How to Cite

Kyobe, J. W. M., Mubofu, E. B., Makame, Y. M. M., Mlowe, S., & Revaprasadu, N. (2016). The use of castor oil and ricinoleic acid in lead chalcogenide nanocrystal synthesis. International Nano Letters, 6(4 (December 2016). https://doi.org/10.1007/s40089-016-0189-4

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Abstract

Abstract 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.

Keywords

  • Castor oil,
  • Ricinoleic acid,
  • Lead chalcogenide nanocrystals,
  • Optical properties,
  • Green synthesis

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