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1
5
transistor, the1–Co complex-linked 3D hybrid network
should have potential applications in nanodevice fabrication.
In summary, we have demonstrated weak and strong co-
ordination strategies for the controlled assembly of quite
different 3D nanostructures. The Au colloids assembled in situ
through weak coordination could be disassembled into indi-
vidual particles, which further reassembled into dispersed
spherical assemblies via strong coordination. It is significant
that the large aggregates formed in situ can be directly
transformed into monodispersed 3D spherical assemblies via
5
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1
strong coordination (with Co ), presenting the first example
of the direct transformation of one 3D nanonetwork into
another quite different one. This effective approach should
be general, not limited to Au colloids, and could be extended
to the assembly of other important inorganic materials, open-
ing new possibilities for the fabrication of optical and electro-
nic nanodevices.
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Acknowledgements
This work was partially supported by the National Natural
Science Foundation of China (nos. 20571050 and 20271031),
China Postdoctoral Science Foundation and the Natural
Science Foundation of Guangdong Province (no. 05300875).
We also thank Dr Qingrui Zhao of the University of Science &
Technology of China and Dr Mingliang Zhang of City Uni-
versity of Hong Kong for their fruitful discussions.
Eaton, A. G. Barrientos, M. Mene
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