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Chemical nano-gardens: growth of salt nanowires from supramolecular self-assembly gels.

Daly, R and Kotova, O and Boese, M and Gunnlaugsson, T and Boland, JJ (2013) Chemical nano-gardens: growth of salt nanowires from supramolecular self-assembly gels. ACS Nano, 7. pp. 4838-4845.

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Abstract

In this article, we examine the phenomenon of single-crystal halide salt wire growth at the surface of porous materials. We report the use of a single-step casting technique with a supramolecular self-assembly gel matrix that upon drying leads to the growth of single-crystal halide (e.g., NaCl, KCl, and KI) nanowires with diameters ~130-200 nm. We demonstrate their formation using electron microscopy and electron-dispersive X-ray spectroscopy, showing that the supramolecular gel stabilizes the growth of these wires by facilitating a diffusion-driven base growth mechanism. Critically, we show that standard non-supramolecular gels are unable to facilitate nanowire growth. We further show that these nanowires can be grown by seeding, forming nanocrystal gardens. This study helps understand the possible prefunctionalization of membranes to stimulate ion-specific filters or salt efflorescence suppressors, while also providing a novel route to nanomaterial growth.

Item Type: Article
Uncontrolled Keywords: Europium Gels Nanotechnology Nanowires Porosity Salts
Subjects: UNSPECIFIED
Divisions: Div E > Production Processes
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 11:46
Last Modified: 28 Jul 2014 01:08
DOI: 10.1021/nn305813y

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