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2005
Nanotechnology
V 1505
Synthesis and Characterization of Highly Luminescent CdSe—Core
0.5Cd0.5S/ZnS Multishell Nanocrystals. — The title multishell nanocrystals
36- 215 CdS/Zn
are prepared using the newly developed successive ion layer adhesion and reaction
method which allows to gradually change the composition of the shell of the nanocrystals from CdS to ZnS in the radial direction with atomic precision. The samples are
characterized by powder XRD, UV/VIS spectroscopy, TEM, and EDX. They exhibit a
high fluorescence quantum yield of 70—85% for amine terminated multishell particles
in organic solvents and a quantum yield of up to 50% for mercapto propionic acid-covered particles in water. The multishell particles also show superior photochemical and
colloidal stability. — (XIE, R.; KOLB, U.; LI, J.; BASCHE, T.; MEWS*, A.; J. Am.
Chem. Soc. 127 (2005) 20, 7480-7488; Inst. Phys. Chem., Johannes-Gutenberg-Univ.,
D-55099 Mainz, Germany; Eng.) — W. Pewestorf
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