Amphiphile-Induced Anisotropic Colloidal Self-Assembly

Rey M, Yu T, Bley K, Landfester K, Buzza DMA, Vogel N (2018)

Publication Language: English

Publication Status: Published

Publication Type: Journal article, Original article

Publication year: 2018

Journal

Langmuir American Chemical Society

Publisher: American Chemical Society

Book Volume: 34

Pages Range: 9990-10000

Journal Issue: 34

DOI: 10.1021/acs.langmuir.8b01382

Abstract

Spherical colloidal particles typically self-assemble into hexagonal lattices when adsorbed at liquid interfaces. More complex assembly structures, including particle chains and phases with square symmetry, were theoretically predicted almost two decades ago for spherical particles interacting via a soft repulsive shoulder. Here, we demonstrate that such complex assembly phases can be experimentally realized with spherical colloidal particles assembled at the air/water interface in the presence of molecular amphiphiles. We investigate the interfacial behavior of colloidal particles in the presence of different amphiphiles on a Langmuir trough. We transfer the structures formed at the interface onto a solid substrate while continuously compressing, which enables us to correlate the prevailing assembly phase as a function of the available interfacial area. We observe that block copolymers with similarities to the chemical nature of the colloidal particles, as well as the surface-active protein bovine serum albumin, direct the colloidal particles into complex assembly phases, including chains and square arrangements. The observed structures are reproduced by minimum energy calculations of hard core–soft shoulder particles with experimentally realistic interaction parameters. From the agreement between experiments and theory, we hypothesize that the presence of the amphiphiles manipulates the interaction potential of the colloidal particles. The assembly of spherical colloidal particles into complex assembly phases on solid substrates opens new possibilities for surface patterning by enriching the library of possible structures available for colloidal lithography.

Authors with CRIS profile

Marcel Rey Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik Taotao Yu Professur für Partikelsynthese Karina Bley Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik Nicolas Vogel Professur für Partikelsynthese

Involved external institutions

University of Hull GB United Kingdom (GB) Max-Planck-Institut für Polymerforschung (MPI-P) / Max Planck Institute for Polymer Research DE Germany (DE)

How to cite

APA:

Rey, M., Yu, T., Bley, K., Landfester, K., Buzza, D.M.A., & Vogel, N. (2018). Amphiphile-Induced Anisotropic Colloidal Self-Assembly. Langmuir, 34(34), 9990-10000. https://doi.org/10.1021/acs.langmuir.8b01382

MLA:

Rey, Marcel, et al. "Amphiphile-Induced Anisotropic Colloidal Self-Assembly." Langmuir 34.34 (2018): 9990-10000.

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