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Fabrication of highly oriented nanocluster arrays by biomolecular templating

  • M. Mertig
  • R. Kirsch
  • W. Pompe
  • H. Engelhardt
Conference paper

Abstract

The formation of highly oriented cluster arrays by chemical deposition. of platinum onto a regular 2D protein template is studied. The crystalline bacterial surface layer (S layer) of Sporosarcina ureae exhibiting a p4 symmetry with a lattice spacing of 13.2 nm is used as the protein template. Cluster deposition onto the S layer is achieved by chemical reduction of a platinum salt. The growth kinetics of the clusters has been examined by UV-VIS spectrometry. Transmission electron microscopy reveals the formation of well separated metal clusters with an average diameter of 1.9 ± 0.6 nm. The lateral cluster arrangement is defined by the underlying protein crystal. We observe 7 cluster sites per unit cell corresponding to a density of 4 × 1012 cm −2. They are located in the nano-sized pores and gaps of the crystalline S layer.

PACS

82.30.N Cluster formation in chemical reactions 68.65.+g Low dimensional structures: superlattices 87.15 Biopolymers 

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Copyright information

© Springer-Verlag Italia 1999

Authors and Affiliations

  • M. Mertig
    • 1
  • R. Kirsch
    • 1
  • W. Pompe
    • 1
  • H. Engelhardt
    • 2
  1. 1.Institut für WerkstoffwissenschaftTechnische Universität DresdenDresdenGermany
  2. 2.Max-Planck-Institut für BiochemieMartinsriedGermany

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