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Electrodeposited Quantum Dots. 6. Epitaxial Size Control in Cd(Se, Te) Nanocrystals on {111} Gold
Author(s) -
Golan Yuval,
Hatzor Anat,
Hutchison John L.,
Rubinstein Israel,
Hodes Gary
Publication year - 1997
Publication title -
israel journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.908
H-Index - 54
eISSN - 1869-5868
pISSN - 0021-2148
DOI - 10.1002/ijch.199700035
Subject(s) - quantum dot , chemistry , epitaxy , nanocrystal , relaxation (psychology) , condensed matter physics , lattice (music) , strain (injury) , substrate (aquarium) , strain energy , lattice constant , crystallography , perpendicular , nanotechnology , diffraction , materials science , optics , oceanography , acoustics , psychology , social psychology , layer (electronics) , medicine , thermodynamics , physics , organic chemistry , finite element method , geology , mathematics , geometry
Size control in epitaxial Cd(Se, Te) quantum dots (QDs) electrochemically deposited on {111} textured Au is achieved by mismatch tuning. The formation of QDs as a form of relaxation of heteroepitaxial strain energy is demonstrated. The increased lattice parameter resulting from incorporation of small amounts of Te in the CdSe lattice leads to reduced mismatch‐induced strain energy and therefore larger QD size. While the QD interatomic spacings at the interface are shown to be unchanged due to the heteroepitaxy with the Au substrate, the perpendicular QD d‐spacings (along the c‐axis) strongly increase with increasing Te content due to strain relaxation.