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