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Published June 1999 | Published
Journal Article Open

Spontaneous patterning of quantum dots at the air-water interface


Nanoparticles deposited at the air-water interface are observed to form circular domains at low density and stripes at higher density. We interpret these patterns as equilibrium phenomena produced by a competition between an attraction and a longer-ranged repulsion. Computer simulations of a generic pair potential with attractive and repulsive parts of this kind, reproduce both the circular and stripe patterns. Such patterns have a potential use in nanoelectronic applications.

Additional Information

© 1999 The American Physical Society Received 25 June 1998; revised 8 March 1999 We would like to acknowledge Sven E. Henrichs for preparing some of the Ag nanoparticles. This work was supported by the U.S. Office of Naval Research (ONR) under Order No. N00014-98-1-0422, and the American Chemical Society Petroleum Research Fund (PRF) under Grant No. 31797-AC9. J.R.H. acknowledges support from the Packard Foundation and the Sloan Foundation.

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