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PPh3 to the aggregates, the chain structures fall apart
immediately (Figure 4a, right, and Figure S7f). This result
strongly suggests that the metal coordination is the driving
force for particle assembly.
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In conclusion, this report describes the first use of metal
coordination to direct the self-assembly of colloidal particles. In
particular, we describe the self-assembly of patchy particles into
larger chains. Our research strategy is based on a triblock
copolymer containing multiple functionalities to functionalize
the patches of the colloidal particles. Metal-coordination-driven
assembly of the colloidal particles is highly directional and
reversible. We view this strategy as a modular method which
enables great advantages toward colloidal particle assembly
including flexibility: polymer size (Mn), architecture, function-
ality, recognition units, and solvents can be adjusted easily to
tune particle interactions.
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ASSOCIATED CONTENT
* Supporting Information
■
S
Experimental procedures, characterization data for all new
compounds, supplementary figures, and videos. This material is
AUTHOR INFORMATION
Corresponding Authors
■
Notes
The authors declare no competing financial interest.
ACKNOWLEDGMENTS
■
This work was supported partially by the MRSEC Program of
the National Science Foundation under Award No. DMR-
0820341. Additional financial support was provided by the
National Science Foundation (CHE-1213743 and DMR-
1105455) and by NASA (NNX08AK04G) to A.D.H. We
acknowledge support from the MRI program of the National
Science Foundation under Award No. DMR-0923251 for the
purchase of a Zeiss field emission SEM.
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