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Tunable Assembly of Heterogeneously Charged Colloids

Autor(en)
Emanuela Bianchi, Christos N. Likos, Gerhard Kahl
Abstrakt

The self-assembly of colloidal particles is a route to designed materials production that combines high flexibility, cost effectiveness, and the opportunity to create ordered structures at length scales ranging from nano- to micrometers. For many practical applications in electronics, photovoltaics, and biomimetic material synthesis, ordered mono- and bilayers are often needed. Here we present a novel and simple way to tune via external parameters the ordering of heterogeneously charged colloids into quasi two-dimensional structures. Depending on the charges of the underlying substrate and of the particles, a rich and versatile assembly scenario takes place, resulting from the complex interplay between directional attractive and repulsive particle–particle and particle–substrate interactions. Upon subtle variations of the relative charge of the system components, emerging via pH modification, reversible changes either from extended aggregates to a monomeric phase or from triangular to square domains are observed.

Organisation(en)
Computergestützte Physik und Physik der Weichen Materie
Externe Organisation(en)
Technische Universität Wien
Journal
Nano Letters: a journal dedicated to nanoscience and nanotechnology
Band
14
Seiten
3412-3418
Anzahl der Seiten
7
ISSN
1530-6984
DOI
https://doi.org/10.1021/nl500934v
Publikationsdatum
06-2014
Peer-reviewed
Ja
ÖFOS 2012
103036 Theoretische Physik, 103018 Materialphysik
Schlagwörter
ASJC Scopus Sachgebiete
Condensed Matter Physics, Mechanical Engineering, Bioengineering, Allgemeine Chemie, Allgemeine Materialwissenschaften
Link zum Portal
https://ucrisportal.univie.ac.at/de/publications/34d56782-7d98-4440-8ad1-6aed41346ec1