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Substrate Based “Bricks-and-Mortar” Self-Assembly of Spherical Nanoparticle Aggregates

Published online by Cambridge University Press:  21 March 2011

Andrew K. Boal ,
Faysal Ilhan  and
Vincent M. Rotello
Andrew K. Boal
Affiliation:
Department of Chemistry, University of Massachusetts, Amherst Amherst, MA. 01003, U. S. A.
Faysal Ilhan
Affiliation:
Department of Chemistry, University of Massachusetts, Amherst Amherst, MA. 01003, U. S. A.
Vincent M. Rotello
Affiliation:
Department of Chemistry, University of Massachusetts, Amherst Amherst, MA. 01003, U. S. A.
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Abstract

Transmission Electron Microscope (TEM) sample girds were coated with recognition element functionalized polymer 2 and exposed to solutions of a Mixed Monolayer Protected Gold Cluster (MMPC) functionalized with a complimentarily recognition element. Interactions between the polymer and MMPC bound recognition elements provide a driving force for the formation of nanoparticle aggregates. Characterization of the resulting structures by TEM revealed that anisotropic growth of structures in the sub-micrometer size regime rapidly occurred. This process was shown to be the result of the specific hydrogen-bonding interactions between the two components. Casting films of polymer 2 from solutions of decreasing concentration achieved control over the process. This lead to the increased formation of regular, circular structuresand a decrease in random nanoparticle adsorption by the film. Analysis of the size of the circular structures revealed that a maximum diameter of approximately 1150 nm was achieved after 30 minutes exposure to MMPC 1 solutions. This size was independent of the concentration of polymer 2 solutions used to cast films.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 676: Symposium Y – Synthesis, Functional Properties and Applications of Nanostructures , 2001 , Y8.5
Copyright
Copyright © Materials Research Society 2001

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References

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