Subnanometer Replica Molding of Molecular Steps on Ionic Crystals

Elhadj, Selim and Rioux, Robert M. and Dickey, Michael D. and DeYoreo, James J. and Whitesides, George M.. (2010) Subnanometer Replica Molding of Molecular Steps on Ionic Crystals. Nano Letters, 10 (10). p. 4140. ISSN 1530-6984

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Replica molding with elastomeric polymers has been used routinely to replicate features less than 10 nm in size. Because the theoretical limit of this technique is set by polymer-surface interactions, atomic radii, and accessible volumes, replication at subnanometer length scales should be possible. Using polydimethylsiloxane to create a mold and polyurethane to form the replica, we demonstrate replication of elementary steps 3−5 Å in height that define the minimum separation between molecular layers in the lattices of the ionic crystals potassium dihydrogen phosphate and calcite. This work establishes the operation of replica molding at the molecular scale. Keywords: Replica molding; KDP; calcite; molecular scale; PDMS; imprint lithography

Item Type: Article
InterNano Taxonomy: Nanoscale Objects and Nanostructured Materials
Nanomanufacturing Processes
Collections: Nanomanufacturing Research Collection
Depositing User: Amulya Gullapalli
Date Deposited: 13 Jul 2011 01:42
Last Modified: 13 Jul 2011 01:42

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