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Issue 1, 2016

Self-assembly of like-charged nanoparticles into microscopic crystals

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Abstract

Like-charged nanoparticles, NPs, can assemble in water into large, faceted crystals, each made of several million particles. These NPs are functionalized with mixed monolayers comprising ligands terminating in carboxylic acid group ligands as well as positively charged quaternary ammonium ligands. The latter groups give rise to electrostatic interparticle repulsions which partly offset the hydrogen bonding between the carboxylic acids. It is the balance between these two interactions that ultimately enables self-assembly. Depending on the pH, the particles can crystallize, form aggregates, remain unaggregated or even – in mixtures of two particle types – can “choose” whether to crystallize with like-charged or oppositely charged particles.

Graphical abstract: Self-assembly of like-charged nanoparticles into microscopic crystals

Supplementary files

Article information


Submitted
09 Oct 2015
Accepted
10 Nov 2015
First published
30 Nov 2015

Nanoscale, 2016,8, 157-161
Article type
Communication
Author version available

Self-assembly of like-charged nanoparticles into microscopic crystals

P. P. Pillai, B. Kowalczyk and B. A. Grzybowski, Nanoscale, 2016, 8, 157 DOI: 10.1039/C5NR06983A

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