Self-Assembly of Janus Nanoparticles into Transformable Suprastructures.

J Phys Chem Lett

Institute of Chemistry and Biotechnology , Zurich University of Applied Sciences, Einsiedlerstrasse 31 , 8820 Waedenswil , Switzerland.

Published: March 2018


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Article Abstract

One of the greatest challenges in colloidal self-assembly is to obtain multiple distinct but transformable suprastructures from the same particles in monophasic solvent. Here, we combined deformable and rigid lobes in snowman-shaped amphiphilic Janus nanoparticles (JNPs). These JNPs exhibited excellent ability to self-assemble into micelles, worms, mini-capsules, giant- and elongated-vesicles. This rich suprastructural diversity was obtained by kinetic manipulation of the self-assembly conditions. The suprastructures consist of four to thousands of highly oriented JNPs with dimensions ranging from 500-nanometer to 30-μm. Moreover, the suprastructures can be transformed into one another or dissembled into individual particles. These features make colloidal assembly highly comparable to that of amphiphilic molecules, however, key differences were discovered.

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http://dx.doi.org/10.1021/acs.jpclett.8b00206DOI Listing

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