A DNA crystal designed to contain two molecules per asymmetric unit

Area of Science:

• * Supramolecular chemistry
• * Nanotechnology
• * Materials science

Background:

• * DNA self-assembly is a powerful tool for creating complex nanostructures.
• * Tensegrity structures offer unique mechanical and architectural properties.
• * Controlling the optical properties of nanomaterials is crucial for advanced applications.

Purpose of the Study:

• * To describe the self-assembly of a novel DNA crystal.
• * To investigate the incorporation of tensegrity triangle molecules into DNA crystals.
• * To demonstrate tunable color properties of DNA crystals through dye attachment.

Main Methods:

• * X-ray crystallography was employed to determine the crystal structure.
• * Self-assembly of DNA components was utilized to form the crystal lattice.
• * Spectroscopic analysis was performed on crystals incorporating Cy3 and Cy5 dyes.

Main Results:

• * A DNA crystal structure containing two tensegrity triangle molecules per asymmetric unit was successfully determined.
• * Crystals exhibited distinct pink (Cy3) and blue-green (Cy5) colors based on dye incorporation.
• * Co-incorporation of both dyes resulted in purple crystals, indicating precise color control.

Conclusions:

• * The study successfully demonstrates the self-assembly of DNA crystals with embedded tensegrity motifs.
• * Tunable optical properties, specifically color, can be achieved by functionalizing DNA crystals with specific dyes.
• * This work opens avenues for developing programmable, color-changing DNA-based materials.