Ligand-Induced Shape Transformation of PbSe Nanocrystals

Chemistry of Materials : a Publication of the American Chemical Society
Joep PetersDaniël Vanmaekelbergh

Abstract

We present a study of the relation between the surface chemistry and nanocrystal shape of PbSe nanocrystals with a variable Pb-to-Se stoichiometry and density of oleate ligands. The oleate ligand density and binding configuration are monitored by nuclear magnetic resonance and Fourier transform infrared absorbance spectroscopy, allowing us to quantify the number of surface-attached ligands per NC and the nature of the surface-Pb-oleate configuration. The three-dimensional shape of the PbSe nanocrystals is obtained from high-angle annular dark field scanning transmission electron microscopy combined with an atom counting method. We show that the enhanced oleate capping results in a stabilization and extension of the {111} facets, and a crystal shape transformation from a truncated nanocube to a truncated octahedron.

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Citations

Jan 24, 2020·The Journal of Chemical Physics·Evan Thomas VickersJin Zhong Zhang
Jan 28, 2021·Accounts of Chemical Research·Bastiaan B V SalzmannDaniel Vanmaekelbergh
Jul 21, 2021·Nature Communications·Guozheng ShiWanli Ma
Mar 22, 2019·Chemistry of Materials : a Publication of the American Chemical Society·Joep L PetersDaniël Vanmaekelbergh
Jun 30, 2018·Journal of the American Chemical Society·Runchen LaiXiaogang Peng
Sep 19, 2017·Nano Letters·Benjamin T DirollChristopher B Murray
Aug 20, 2019·Chemistry of Materials : a Publication of the American Chemical Society·J L PetersD Vanmaekelbergh
Jun 23, 2018·The Journal of Physical Chemistry. C, Nanomaterials and Interfaces·Carlo van OverbeekDaniel Vanmaekelbergh
Sep 25, 2018·Chemistry of Materials : a Publication of the American Chemical Society·Joep L PetersSophia Buhbut Sinai

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Methods Mentioned

BETA
nuclear magnetic resonance
transmission electron microscopy
NMR
electron tomography

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