Sub-10 nm monodisperse PbS cubes by post-synthesis shape engineering

Haitao Zhang; Jun Yang; Tobias Hanrath; Frank W Wise

doi:10.1039/c4cp01531b

Sub-10 nm monodisperse PbS cubes by post-synthesis shape engineering

Phys Chem Chem Phys. 2014 Jul 28;16(28):14640-3. doi: 10.1039/c4cp01531b.

Authors

Haitao Zhang¹, Jun Yang, Tobias Hanrath, Frank W Wise

Affiliation

¹ School of Applied and Engineering Physics, Cornell University, Ithaca, NY 14853, USA. hz244@cornell.edu.

PMID: 24916179
DOI: 10.1039/c4cp01531b

Abstract

Sub-10 nm monodisperse PbS cubes are synthesized by reacting quasi-spherical PbS nanocrystals with (NH4)2S. This reaction shapes the quasi-spheres into cubes via preferential growth of the (111) facets. A four-band envelope function calculation of the energy levels accounts well for the measured absorption spectra. Initial studies show that PbS cubes can organize into simple square superlattices with short ligands.