https://doi.org/10.1140/epjd/e2005-00114-9
Stoichiometric and ultra-stable nanoparticles of II-VI compound semiconductors
1
Center for Interdisciplinary Research, Tohoku University, Sendai, Japan
2
Graduate School of Environmental Studies, Sendai, Japan
3
Institute for Materials Research, Tohoku University, Sendai, Japan
4
VKF, Chennai, India
5
Graduate School of Medicine, Tohoku University, Sendai, Japan
Corresponding author: a kasuya@cir.tohoku.ac.jp
Received:
6
September
2004
Published online:
13
July
2005
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.
PACS: 61.46.+w – Nanoscale materials: clusters, nanoparticles, nanotubes, and nanocrystals / 78.67.-n – Optical properties of nanoscale materials and structures / 78.66.Hf – II-VI semiconductors / 36.40.-c – Atomic and molecular clusters
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2005
