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Langmuir. 2012 Dec 11;28(49):16782-7. doi: 10.1021/la303287z. Epub 2012 Oct 15.

Directed self-assembly of densely packed gold nanoparticles.

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Institute of Materials Research and Engineering, Agency for Science, Technology and Research (A*STAR), 117602, Singapore.


Directing the self-assembly of sub-10-nm nanoparticles has been challenging because of the simultaneous requirements to achieve a densely packed monolayer and rearrange nanoparticles to assemble within a template. We met both requirements by separating the processes into two steps by first forming a monolayer of gold nanoparticles on a suitable liquid subphase of anisole and then transferring it edgewise onto a silicon substrate with a prepatterned template comprising nanoposts and nanogratings. Doing so resulted in nanoparticles that assembled in commensuration with the template design while exhibiting appreciable template-induced strain. These dense arrays of nanostructures could either be directly applied or used as lithographic masks in applications for light collection, chemical sensing, and data storage.


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