Multigram Scale, Solventless, and Diffusion-Controlled Route to Highly Monodisperse PbS Nanocrystals
The Journal of Physical Chemistry B2005Vol. 110(2), pp. 671–673
Citations Over TimeTop 10% of 2005 papers
Ludovico Cademartiri, Jacopo Bertolotti, Riccardo Sapienza, Diederik S. Wiersma, Georg von Freymann, Geoffrey A. Ozin
Abstract
High-quality PbS nanocrystals were produced in multigram-scale quantities through a solventless, heterogeneous, and relatively green route. The heterogeneous nature of this reaction allows one to limit the diffusion in the system, allowing for unprecedented monodispersity and quality of the product demonstrated by a full-width at half-maximum of the photoluminescence peak (PL fwhm) as low as 52 meV, a Stokes shift as low as 10 meV, and a quantum yield (QY) of 40%. The growth of the nanocrystals is interpreted in the framework of a diffusion-controlled Ostwald growth in conditions of strong supersaturation.
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