Journal
NANO LETTERS
Volume 4, Issue 10, Pages 1943-1948Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl048846e
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We describe the single-step sell-organization of nanocrystal superlattice films infused with spatially ordered arrays of micrometer-size pores. In a humid atmosphere, water droplets condense on the surface of evaporating thin-film solutions of nanocrystals. Nanocrystals coated with the appropriate ligands stabilize the water droplets, allowing them to grow to uniform size and ultimately pack into very ordered arrays. The droplets provide a temporary template that casts an ordered macroporous nanocrystal film. This process could serve as a reliable bottom-up self-assembly approach for fabricating two-dimensional waveguides with tunable optical properties for single-chip integration of photonic and electronic technologies.
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