Hierarchically self-assembled hexagonal honeycomb and kagome superlattices of binary 1D colloids

Sung-Hwan Lim, Taehoon Lee, Younghoon Oh, Theyencheri Narayanan, Bong June Sung and Sung-Min Choi ()
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Sung-Hwan Lim: Korea Advanced Institute of Science and Technology
Taehoon Lee: Korea Advanced Institute of Science and Technology
Younghoon Oh: Sogang University
Theyencheri Narayanan: European Synchrotron Radiation Facility
Bong June Sung: Sogang University
Sung-Min Choi: Korea Advanced Institute of Science and Technology

Nature Communications, 2017, vol. 8, issue 1, 1-9

Abstract: Abstract Synthesis of binary nanoparticle superlattices has attracted attention for a broad spectrum of potential applications. However, this has remained challenging for one-dimensional nanoparticle systems. In this study, we investigate the packing behavior of one-dimensional nanoparticles of different diameters into a hexagonally packed cylindrical micellar system and demonstrate that binary one-dimensional nanoparticle superlattices of two different symmetries can be obtained by tuning particle diameter and mixing ratios. The hexagonal arrays of one-dimensional nanoparticles are embedded in the honeycomb lattices (for AB2 type) or kagome lattices (for AB3 type) of micellar cylinders. The maximization of free volume entropy is considered as the main driving force for the formation of superlattices, which is well supported by our theoretical free energy calculations. Our approach provides a route for fabricating binary one-dimensional nanoparticle superlattices and may be applicable for inorganic one-dimensional nanoparticle systems.

Date: 2017
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DOI: 10.1038/s41467-017-00512-9

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