Metallization of a genetically engineered polypeptide |
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Authors: | Carlsen Autumn Higashiya Seiichiro Topilina Natasha I Dunn Kathleen A Geer Robert E Eisenbraun Eric T Kaloyeros Alain E Welch John T |
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Institution: | College of Nanoscale Science and Engineering (CNSE), University at Albany, SUNY, Albany, NY 12203, USA. atcarlsen@gmail.com |
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Abstract: | Recently, well-ordered biological materials have been exploited to pattern inorganic nanoparticles into linear arrays that are of particular interest for nanoelectronic applications. In this work, a de novo designed E. coli-expressed polypeptide (previously shown to form highly rectilinear, β-sheet-containing structures) operates as a template for divalent metal cations. EDX and TEM analysis verify the attachment of platinum ions to the histidine-rich fibril surface, which was designed specifically to facilitate attachment of chemical moieties. Following chemical reduction, TEM further confirms the formation of localized zero-valent metal aggregates with sub-nanometer interparticle spacing. |
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Keywords: | biomimetic genetic engineering metallization polypeptides transmission electron microscopy |
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