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The growth of nanocrystal superlattices of 5 nm single domain Au nanocrystals at an air–toluene interface induces formation of well-defined thin films (300–400 nm) with large coherence lengths. High-resolution electron microscopy showed that polyhedral holes (negative supracrystal) were formed on the nanocrystal superlattice surface. Formation of negative supracrystals is attributed to inclusion in the superlattice of organic molecules (dodecanethiol), which are present in concentrated zones at the air–toluene interface. The coexistence of two supracrystalline structures (bcc/fcc) is attributed to diffusion of dodecanethiol molecules resulting in a Bain deformation of the nanocrystal array.

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Publication history
Copyright
Acknowledgements

Publication history

Received: 30 August 2013
Revised: 04 November 2013
Accepted: 06 November 2013
Published: 14 December 2013
Issue date: February 2014

Copyright

© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2013

Acknowledgements

Acknowledgements

The authors thank Dr. Albouy for small angle X-ray scattering experiments and Prof. Brust for fruitful discussion. This research has received funding from an Advanced Grant of the European Research Council under Grant Agreement No. 267129.

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