Synthesis of cadmium sulphide superlattices using self-assembled bacterial S-layers (original) (raw)

Nature volume 389, pages 585–587 (1997)Cite this article

Abstract

Methods for organizing materials at the nanometre scale have advanced tremendously in recent years1,2. One important objective is the synthesis of patterned arrays of inorganic nanocrystals3,4,5,6, whose optical, electronic and magnetic properties might find technological uses, for example as memory elements. Techniques such as colloidal crystallization7,8,9, monolayer deposition10,11,12, multilayer casting13, molecular crosslinking14,15, the use of complementary interactions16,17 and the synthesis of nanoparticles in patterned etch pits18 have been used to organize nanocrystals into superlattices. Here we describe the use of bacterial S-layers — self-assembled, two-dimensionally ordered films of proteins that feature in many bacterial cell walls — as templates for the in situ nucleation of ordered two-dimensional arrays of cadmium sulphide nanocrystals about 5 nm in size. Nucleation of the inorganic phase is confined to the pores between subunits in the S-layers. Two-tier stacks of nanoparticles can be formed in the presence of double-layered protein crystals. The structural diversity of S-layers19,20, their ease of self-assembly on a wide range of substrates and the potential for surface chemical modification suggest that this approach could be exploited to offer a wide range of ordered nanoparticle arrays.

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Acknowledgements

W.S. thanks the University of Bath for a postgraduate studentship. This work was supported in part by the Austrian Science Foundation, Project S7204 and S7205, the Austrian Ministry of Science and Transportation, and the Austrian National Bank.

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Author notes

  1. Wayne Shenton, Dietmar Pum and Uwe B. Sleytr: These authors contributed equally to this work

Authors and Affiliations

  1. School of Chemistry, University of Bath, Bath, BA2 7AY, UK
    Wayne Shenton & Stephen Mann
  2. Center for Ultrastructure Research and Ludwig Boltzmann Institute for Molecular Nanotechnology, Universitt for Bodenkultur Wien, Vienna, Austria
    Dietmar Pum & Uwe B. Sleytr

Authors

  1. Wayne Shenton
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  2. Dietmar Pum
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  3. Uwe B. Sleytr
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  4. Stephen Mann
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Corresponding authors

Correspondence toUwe B. Sleytr or Stephen Mann.

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Shenton, W., Pum, D., Sleytr, U. et al. Synthesis of cadmium sulphide superlattices using self-assembled bacterial S-layers.Nature 389, 585–587 (1997). https://doi.org/10.1038/39287

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