Simple synthesis of PbSe nanocrystals and their self-assembly into 2D ‘flakes’ and 1D ‘ribbons’ structures

[Display omitted] •PbSe is obtained in a simple way by the co-precipitation method at low-temperature.•The structural, morphological and optical properties of PbSe were studied.•Adding NH4OH to the precursor solutions influences on the morphology.•2D- and 1D-PbSe structures assemble by oriented atta...

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Bibliographic Details
Published in:Materials research bulletin 2016-08, Vol.80, p.96-101
Main Authors: Díaz-Torres, E., Ortega-López, M., Matsumoto, Y., Santoyo-Salazar, J.
Format: Article
Language:English
Subjects:
A. Nanostructures
ABSORPTION SPECTRA
AMMONIUM HYDROXIDES
AQUEOUS SOLUTIONS
B. Chemical synthesis
C. Transmission electron microscopy (TEM)
C. X-ray diffraction
COPRECIPITATION
CRYSTAL STRUCTURE
CRYSTALS
D. Crystal structure
LEAD NITRATES
LEAD SELENIDES
MATERIALS SCIENCE
NANOPARTICLES
NANOSCIENCE AND NANOTECHNOLOGY
NANOSTRUCTURES
NITROGEN OXIDES
OPTICAL PROPERTIES
SYNTHESIS
THERMOELECTRIC GENERATORS
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION
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Summary:[Display omitted] •PbSe is obtained in a simple way by the co-precipitation method at low-temperature.•The structural, morphological and optical properties of PbSe were studied.•Adding NH4OH to the precursor solutions influences on the morphology.•2D- and 1D-PbSe structures assemble by oriented attachment.•PbSe can be a potential candidate for thermoelectric applications. This work presents a simple and low-temperature method to prepare a variety of Lead selenide (PbSe) nanostructures, using aqueous solutions of Pb(NO3)2 and NaHSe. Nanostructures with different morphology were obtained by varying the Pb:Se molar ratio, as well as the mixing sequence of NH4OH with either Pb(NO3)2 or NaHSe. Nanoparticles with different shapes (spherical and octahedral), and self-assembled structures (flakes and ribbons) were observed by Transmission Electron Microscopy. X-ray results confirmed that the PbSe rock-salt crystalline structure was obtained for all of the prepared samples. The crystal size is in the order of 7.3 to 8.9nm for single nanocrystals. The absorption spectra of the samples show exciton absorption bands at 1395nm and 1660nm. This material could be used to develop more advanced structures for thermoelectric generators.
ISSN:0025-5408
1873-4227
DOI:10.1016/j.materresbull.2016.03.035