TITLE

Room temperature ferromagnetism at self-assembled monolayer modified Ag nanocluster–ZnO nanowire interface

AUTHOR(S)
Deng, S.; Loh, K. P.; Yi, J. B.; Ding, J.; Tan, H. R.; Lin, M.; Foo, Y. L.; Zheng, M.; Sow, C. H.
PUB. DATE
November 2008
SOURCE
Applied Physics Letters;11/10/2008, Vol. 93 Issue 19, p193111
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Magnetic characterization of ZnO nanowires (NW) decorated with thiol-capped Ag nanoclusters (NCs) reveals spontaneous field-dependent magnetization and hysteresis at room temperature. The saturation magnetization is temperature independent for the 13 nm thiol-capped Ag NCs but unexpectedly increases with temperature for the 4 nm thiol-capped Ag NCs. The high magnetic moment results from the efficient dispersal of Ag NCs on the ZnO NW scaffold and charge transfer interaction between Ag and ZnO. The anomalous magnetic behavior in 4 nm NCs may be due to the spin reorientation of Ag–S dipoles mediated by Zn–S dipoles.
ACCESSION #
35514287

 

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