Hydrodynamic assembly of two-dimensional layered double hydroxide nanostructures

Nicholas A. Jose, Hua Chun Zeng and Alexei A. Lapkin ()
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Nicholas A. Jose: University of Cambridge
Hua Chun Zeng: Cambridge Centre for Advanced Research and Education in Singapore Ltd.
Alexei A. Lapkin: University of Cambridge

Nature Communications, 2018, vol. 9, issue 1, 1-12

Abstract: Abstract Formation mechanisms of two-dimensional nanostructures in wet syntheses are poorly understood. Even more enigmatic is the influence of hydrodynamic forces. Here we use liquid flow cell transmission electron microscopy to show that layered double hydroxide, as a model material, may form via the oriented attachment of hexagonal nanoparticles; under hydrodynamic shear, oriented attachment is accelerated. To hydrodynamically manipulate the kinetics of particle growth and oriented attachment, we develop a microreactor with high and tunable shear rates, enabling control over particle size, crystallinity and aspect ratio. This work offers new insights in the formation of two-dimensional materials, provides a scalable yet precise synthesis method, and proposes new avenues for the rational engineering and scalable production of highly anisotropic nanostructures.

Date: 2018
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DOI: 10.1038/s41467-018-07395-4

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