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Design and Synthesis of a Reconfigurable DNA Accordion Rack

Design and Synthesis of a Reconfigurable DNA Accordion Rack

Published on: August 15, 2018

Binary Superlattice Design by Controlling DNA-Mediated Interactions.

Minseok Song¹, Yajun Ding¹, Hasan Zerze¹

¹Department of Chemical and Biomolecular Engineering, Lehigh University , 111 Research Drive, Iacooca Hall, Bethlehem, Pennsylvania 18015, United States.

Langmuir : the ACS Journal of Surfaces and Colloids

|November 8, 2017

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Researchers developed a new method for creating binary superlattices using DNA-functionalized particles. This approach controls particle interactions, enabling diverse lattice structures without relying on particle size differences.

Area of Science:

Materials Science
Nanotechnology
Biotechnology

Background:

Binary superlattices are typically formed using DNA-functionalized particles (DFPs) where size differences drive ordering.
Existing methods rely on particle size tuning (entropic forces) for structural diversity.

Purpose of the Study:

To develop a novel strategy for designing binary superlattices using tunable interparticle interactions (enthalpic driving forces).
To create diverse 2D lattices without relying on particle size differences.

Main Methods:

Utilized DNA functionalization of micron-sized silica particles.
Employed tailored blends of complementary single-stranded DNA (ssDNA) to control interparticle interactions.
Investigated the effect of ssDNA stoichiometry on particle assembly.

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Main Results:

Demonstrated the programmable assembly of binary superlattices into square, pentagonal, and hexagonal lattices.
Achieved compositional ordering in square checkerboard, hexagonal-alternating string, honeycomb, and Kagome arrangements.
Showcased the ability to control particle arrangement by adjusting mixture stoichiometry.

Conclusions:

The developed strategy offers a new route for designing complex binary superlattices.
This method expands the possibilities for creating ordered structures by controlling interaction enthalpies.
The approach is versatile, enabling diverse lattice geometries and compositions.