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Electrodeposited Quantum Dots: Metastable Rocksalt CdSe Nanocrystals on {111} Gold Alloys
Author(s) -
Zhang Y.,
Hodes G.,
Rubinstein I.,
Grünbaum E.,
Nayak R. R.,
Hutchison J. L.
Publication year - 1999
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/(sici)1521-4095(199912)11:17<1437::aid-adma1437>3.0.co;2-1
Subject(s) - materials science , wurtzite crystal structure , nanocrystal , metastability , alloy , quantum dot , deposition (geology) , epitaxy , phase (matter) , thin film , nanotechnology , chemical engineering , composite material , metallurgy , layer (electronics) , zinc , paleontology , chemistry , physics , organic chemistry , quantum mechanics , sediment , engineering , biology
Thin layers of epitaxial CdSe nanocrystals with rocksalt structure have been electrodeposited onto gold alloy films. The rocksalt phase does not normally exist for CdSe at ambient pressure, and its (meta)‐stability is attributed to the strong interaction between CdSe and Cd–Au (since the phase is virtually absent for deposition onto pure gold films), and to the compressive surface tension forces of the very thin crystals. As the deposition continues, the crystals undergo a solid–solid phase transition to the more stable zincblende and wurtzite phases.