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Light micrographs showing localized deposition of charged colloidal particles controlled by micropatterned ionic self-assembled monolayers.

(a) Positively charged spheres attach to negatively charged regions of a wet template. The inset shows a scanning electron micrograph of the substrate geometry.

(b) The structures focus due to capillary forces as the template dries.

(c) Positively charged colloids deposited from a 0.005M LiCl solution.

(d) Negatively charged spheres attach to positively charged regions.

From:

Authors: Joanna Aizenberg, Paul V. Braun, and Pierre Wiltzius.

Date: March 27, 2000.

Lucent Technologies, Bell Laboratories, Murray Hill, NJ 07974, USA

Physical Review Letters, vol. 84, no. 13, 2997-3000. [1]

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