Synthesis and assembly of colloidal cuboids with tunable shape biaxiality

Yang Yang, Guangdong Chen, Srinivas Thanneeru, Jie He, Kun Liu () and Zhihong Nie ()
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Yang Yang: University of Maryland
Guangdong Chen: University of Maryland
Srinivas Thanneeru: University of Connecticut
Jie He: University of Connecticut
Kun Liu: Jilin University
Zhihong Nie: University of Maryland

Nature Communications, 2018, vol. 9, issue 1, 1-8

Abstract: Abstract The design and assembly of monodisperse colloidal particles not only advances the development of functional materials, but also provides colloidal model systems for understanding phase behaviors of molecules. This communication describes the gram-scale synthesis of highly uniform colloidal cuboids with tunable dimension and shape biaxiality and their molecular mesogen-like assembly into various mesophasic structures in pristine purity. The synthesis relies on the nanoemulsion-guided generation of ammonium sulfate crystals that template the subsequent silica coating. The shape of the cuboidal particles can be tuned from square platelike, to biaxial boardlike, and to rodlike by independently controlling the length, width and thickness of the particles. We demonstrated the assembly of the cuboidal colloids into highly pure mesoscopic liquid crystal phases, including smectic A, biaxial smectic A, crystal B, discotic, and columnar phases, as well as established a correlation between mesophasic formation and colloidal biaxiality in experiments.

Date: 2018
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Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-06975-8

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DOI: 10.1038/s41467-018-06975-8

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