Fudong Wang, W. E. Buhro
Feb 8, 2018
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Influential Citations
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Journal
Chemistry of Materials
Abstract
n-Tetradecylphosphonic acid (TDPA) is an acid and also a source for a strong-binding ligand, n-tetradecylphosphonate (TDPT), for the preparation of the cadmium precursor Cd(DOPT)x(TDPT)1–0.5x (where DOPT = di-n-octylphosphinate). The reaction chemistry of the cadmium precursor and tri-n-octylphosphine telluride (TOPTe) is manipulated to favor the formation of a CdTe solute if the catalytic role of TDPA as an acid is predominant; otherwise the stabilization of the cadmium precursor by TDPT incorporation results in a significant excess of Te in the reaction mixture. These exert opposite consequences on the crystal-phase purity of colloidal CdTe quantum wires (QWs) grown from initial bismuth (Bi) nanoparticles. Primary dissolution of the available CdTe or Te into Bi nanoparticles affords liquid (y ≈ z) or solid (y ≪ z) BixCdyTez catalysts, respectively. The solid catalysts enable the solution–solid–solid growth of nearly phase-pure wurtzite QWs, whereas the liquid catalysts fulfill the solution–liquid–solid ...