Abstract
Anisotropic colloidal crystals are materials with novel optical and electronic properties. However, experimental observations of colloidal single crystals have been limited to relatively isotropic 1018habits. Here, we show DNA-mediated crystallization of two types of nanoparticles with different hydrodynamic radii that form highly anisotropic, hexagonal prism microcrystals with AB2 crystallographic symmetry. The DNA directs the nanoparticles to assemble into a nonequilibrium crystal shape that is enclosed by the highest surface energy facets (AB2(1010) and AB2(0001)). Simulations and theoretical arguments show that this observation is a consequence of large energy barriers between different terminations of the AB2(1010) facet, which results in a significant deceleration of the (1010) facet growth rate. In addition to reporting a hexagonal colloidal crystal habit, this work introduces a potentially general plane multiplicity mechanism for growing nonequilibrium crystal shapes, an advance that will be useful for designing colloidal crystal habits with important applications in both optics and photocatalysis.
Original language | English (US) |
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Title of host publication | Spherical Nucleic Acids |
Subtitle of host publication | Volume 3 |
Publisher | Jenny Stanford Publishing |
Pages | 1017-1032 |
Number of pages | 16 |
Volume | 3 |
ISBN (Electronic) | 9781000092486 |
ISBN (Print) | 9789814877237 |
DOIs | |
State | Published - Jan 1 2021 |
Externally published | Yes |
ASJC Scopus subject areas
- General Biochemistry, Genetics and Molecular Biology
- General Engineering
- General Chemistry