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    Displaceable Templates with Sub-10 nm Periodicity Activate and Direct Epitaxial Assembly of Complex Aromatic Molecules

    Year: 2020

    Journal: Chem. Mat., Volume 32, MAR 24, page 2552–2560

    Authors: Russell, SR; Davis, TC; Clark, MG; Hayes, TR; Claridge, SA

    Organizations: NSF CAREER awardNational Science Foundation (NSF)NSF - Office of the Director (OD) [NSF-CHE 1555173]; DuPont Young Professor Award; 3 M Non-Tenured Faculty Award3M; W. Brooks Fortune Predoctoral Fellowship; Frederick N. Andrews Predoctoral Fellowship; Cagiantas Fellowship

    Templating molecular assembly at interfaces is a ubiquitous challenge in designing new nanostructured materials. Templates for heterostructured functional interfaces would ideally control assembly across a range of scales and constrain molecules to desired orientations, while leaving minimal residue to impact the physical properties of the completed interface. Here, we illustrate a class of displaceable molecular templates based on striped phases of amphiphiles (e.g., long-chain diynoic acids) on graphite. The noncovalently adsorbed striped templates control assembly of complex aromatic adsorbates (here, diphenylalanine derivatives). The template has a sub-10 nm periodicity, producing similar minimal adsorbate feature widths, and can be patterned over microscopic regions, thus controlling ordering across a range of length scales. Assembly of the molecular adsorbates proceeds through displacement of the alkyl templates. This capability minimizes template residue in the final assembled interface.
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