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Title
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Low-dimensional semiconductor superlattices formed by geometric control over nanocrystal attachment
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Author
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Abstract
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| Oriented attachment, the process in which nanometer-sized crystals fuse by atomic bonding of specific crystal facets, is expected to be more difficult to control than nanocrystal self-assembly that is driven by entropic factors or weak van der Waals attractions. Here, we present a study of oriented attachment of PbSe nanocrystals that counteract this tuition. The reaction was studied in a thin film of the suspension casted on an immiscible liquid at a given temperature. We report that attachment can be controlled such that it occurs with one type of facets exclusively. By control of the temperature and particle concentration we obtain one- or two-dimensional PbSe single crystals, the latter with a honeycomb or square superimposed periodicity in the nanometer range. We demonstrate the ability to convert these PbSe superstructures into other semiconductor compounds with the preservation of crystallinity and geometry. |
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Language
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English
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Source (journal)
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Nano letters / American Chemical Society. - Washington
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Publication
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Washington
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2013
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ISSN
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1530-6984
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DOI
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10.1021/NL303322K
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Volume/pages
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13
:6
(2013)
, p. 2317-2323
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ISI
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000320485100001
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Full text (Publisher's DOI)
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Full text (publisher's version - intranet only)
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