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Stoichiometric and ultra-stable nanoparticles of II-VI compound semiconductors
A. Kasuya, Y. Noda, I. Dmitruk, V. Romanyuk, Y. Barnakov, K. Tohji, , R. Belosludov, Y. Kawazoe, N. Ohuchi
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Volume: 34
Issue: 1-3
Pages: 39 - 41
Nanoparticles of (CdSe)n are found extremely stable at n = 33 and 34 with structures distinctively different from the bulk fragments. They grow exclusively in large amount with a simple solution method. The diameter is determined as 1.5 nm. Such ultra-stable nanoparticles had been predicted both theoretically and experimentally after the discovery of carbon fullerenes, but not been produced macroscopically in any other element or compound system. First-principles calculations predict that the structures of (CdSe)33 and (CdSe)34 are puckered (CdSe)28-cages accommodating respectively (CdSe)5 an (CdSe)6 inside to form a three-dimensional network of essentially hetero-polar sp3-bonding. {\textcopyright} EDP Sciences, Societ{\`{a}} Italiana di Fisica, Springer-Verlag 2005.
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