Premium
Control of Metal‐Ion Composition in the Synthesis of Ternary II‐II′‐VI Nanoparticles by Using a Mixed‐Metal Cluster Precursor Approach
Author(s) -
DeGroot Marty W.,
Rösner Harald,
Corrigan John F.
Publication year - 2006
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.200501081
Subject(s) - nanoclusters , nanoparticle , nanocrystalline material , ternary operation , nanocrystal , cluster (spacecraft) , materials science , crystallography , metal , thermal decomposition , metal ions in aqueous solution , ion , stoichiometry , analytical chemistry (journal) , chemistry , nanotechnology , organic chemistry , computer science , metallurgy , programming language
The ternary molecular nanoclusters [Zn x Cd 10− x Se 4 (SePh) 12 (P n Pr 3 ) 4 ] ( x =1.8, 1 a ; x =2.6, 1 b ) were employed as single‐source precursors for the synthesis of high‐quality hexagonal Zn x Cd 1− x Se nanocrystals. The tellurium clusters [Zn x Cd 10− x Te 4 (TePh) 12 (P n Pr 3 ) 4 ] ( x =1.8, 2 a ; x =2.6, 2 b ) are equally convenient precursors for the synthesis cubic Zn x Cd 1− x E nanoparticles. The thermolysis of the cluster molecules in hexadecylamine provides an efficient system in which the inherent metal‐ion stoichiometry of the clusters is retained in the nanocrystalline products, whilst also affording control of particle size within the 2–5 nm range. In all cases, the nanoparticles are monodisperse, and luminescence spectra exhibit emission energies close to the absorption edge. Analysis of the optical spectra and X‐ray diffraction patterns of these materials indicates a metal‐ion concentration gradient within the structures of the nanocrystals, with Zn II ions predominantly located near the surface of the particles.