Shape and Phase Control of Colloidal ZnSe Nanocrystals
Chemistry of Materials2005Vol. 17(6), pp. 1296–1306
Citations Over TimeTop 10% of 2005 papers
P. Davide Cozzoli, Liberato Manna, Maria Lucia Curri, Stefan Kudera, Cinzia Giannini, Marinella Striccoli, Angela Agostiano
Abstract
Shape- and phase-controlled ZnSe nanocrystals are synthesized in hot mixtures of long-chain alkylamines and alkylphosphines. The variation in the rate of precursor addition, down to low and controlled levels, allows the nucleation, as well as the growth of the nanocrystals, to switch between the wurtzite and the zinc blend structures. Such a level of control leads to a variety of shapes, from spheres to rods to three-dimensional structures formed by rod sections interconnected through branching points. The temperature- and time-dependence of the chemical potentials for the monomer species in solution are the most relevant parameters involved in the growth mechanism.
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