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Patterned when wet: Environment-dependent multifunctional patterns within amphiphilic colloidal crystals

Brozell, Adrian M. and Muha, Michelle A. and Abed-Amoli, Arian and Bricarello, Daniel and Parikh, Atul N. (2007) Patterned when wet: Environment-dependent multifunctional patterns within amphiphilic colloidal crystals. NANO LETTERS, 7 (12). pp. 3822-3826.

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Official URL: http://pubs.acs.org/doi/abs/10.1021/nl072483b

Abstract

A simple integration of molecular and colloidal self-assembly approaches with photopatterning is shown to produce multifunctional patterns of amphiphilic,colloidal crystals. These crystals display binary spatial patterns of wettability by water and a single photonic stop-band in air. Upon exposure to water, the uniform stop-band is replaced by a pattern of coexisting stop-bands that reflect the underlying pattern of surface wetting. These hydration-dependent photonic patterns within single colloidal crystals form because of near-complete water rejection from the three-dimensionally disposed nanoscale interstices in hydrophobic regions and its exclusive permeation within the hydrophilic regions. This water permeation pattern is further structured by the three-dimensional (3D) distribution and contiguity of the nanoscale interstices between individual colloids, allowing 3D patterned organization of functional units in secondary self-assembly processes, as illustrated using quantum dots, metal nanoparticles, and fluorescent probes.

Item Type:Article
Subjects:Material Science > Nanofabrication processes and tools
Material Science > Soft materials
Material Science > Nanostructured materials
ID Code:1868
Deposited By:Farnush Anwar
Deposited On:23 Dec 2008 10:45
Last Modified:23 Dec 2008 10:45

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