Mono-patchy zwitterionic microcolloids as building blocks for pH-controlled self-assembly

Soft Matter
Fatemeh Naderi MehrAlexander Böker

Abstract

A directional molecular interaction between microcolloids can be achieved through pre-defined sites on their surface, "patches", which might make them follow each other in a controlled way and assemble into target structures of more complexity. In this article, we report the successful generation and characterization of mono-patchy melamine-formaldehyde microparticles with oppositely charged patches made of poly(methyl vinyl ether-alt-maleic acid) or polyethyleneimine via microcontact printing. The study of their self-aggregation behavior in solution shows that by change of pH, particle dimers are formed via attractive electrostatic force between the patchy and non-patchy surface of the particles, which reaches its optimum at a specific pH.

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Citations

Aug 7, 2019·Chemical Communications : Chem Comm·Marcel SperlingAlexander Böker
Oct 17, 2019·Physical Chemistry Chemical Physics : PCCP·Manuella CerbelaudArnaud Videcoq
Mar 18, 2020·Small·Fatemeh Naderi MehrAlexander Böker
Nov 20, 2020·International Journal of Molecular Sciences·Carina KarnerEmanuela Bianchi

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Methods Mentioned

BETA
fluorescence microscopy
AFM

Software Mentioned

Leica
LAS X
Nanoscope Analysis

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